WO2008035422A1 - Joint for medical tools and medical instrument - Google Patents

Abstract

It is intended to provide a joint for medical tools which can be easily attached to a liquid port of a medical tool and detached therefrom, makes it possible to movably and air-tightly connect a tube for medical use, has a simple structure and is disposable. It is also intended to provide a disposable medical instrument which can be conveniently and safely connected to a medical tool. A joint (60, 70) for a medical tool comprising a coupler (30), a connector (40) and a locking mechanism, wherein the coupler (30) has an outer tube (32) that is connectable to a liquid port of a medical tool, an inner tube (33) that can be packed in the outer tube (32) and a connection board (1) that air-tightly connects the intermediate part of the inner wall of the outer tube (32) with the outer wall of the inner tube (33), the connector (40), which comprises a hollow tube having a protruding stopper (42) in the outside intermediate part, is movably and air-tightly connected when inserted into the inner tube (33) of the coupler (30). The locking mechanism is characterized by being a mechanism for preventing the connector (40) from detachment from the coupler (30). The constitution of the medical instrument is characterized in that the joint for medical tools as described above or the parts of thejoint for medical tools excluding the coupler are integrated with the end of the tube.

Description

 Specification

 Medical device fittings and medical devices

 Technical field

 The present invention relates to a medical device joint and a medical device for liquid-tightly connecting a liquid port of a medical device and a medical tube.

 Background art

 [0002] Medical devices used for extracorporeal circulation treatment of bodily fluids typified by blood and plasma, such as human kidney, hemofiltration dialyzer, blood filter, plasma component separator, plasma separator, leukocyte remover, A blood component adsorber or the like has one or more liquid ports for circulating body fluids and passing water and aqueous solutions.

 [0003] When performing extracorporeal circulation treatment of bodily fluids, these fluid ports allow a physiological solution to flow for priming medical devices and collecting bodily fluids, circulate bodily fluids themselves, or flow dialysis fluids. Used to do.

 Conventionally, in order to circulate dialysate through a dialyzer, a circuit having a Hansen-type force bra that can be connected to a dialysate-side port of the dialyzer has been used. This force bra can be connected to a port having a structure that conforms to the standards of the International Organization for Standardization (ISO) as described in Non-Patent Document 1, and prevents inflow and outflow of dialysate from the dialyzer. It can be done and is widely used.

 [0005] For example, Patent Document 1 discloses a joint for a blood purification apparatus for connecting a tube end to a blood side port of the blood purification apparatus. According to the present invention, the inner cylinder member is pressed against the opening cylinder part by the stopper part to make it liquid-tight, and only the outer cylinder member is rotated to form the screw shape formed on the outer peripheral wall on the inner peripheral wall of the outer cylinder part. Since the joint can be connected to the port by screwing it into the formed screw shape, the tube does not remain twisted when the joint is rotated, and the tube is not twisted.

[0006] In Patent Document 2, it is easy to plug and unplug, when it does not come into direct contact with the liquid port during sealing and unplugging, and when the internal pressure of the container increases during sterilization or transportation. In addition, it is possible to completely prevent the internal liquid from leaking out due to a plug removal etc. A device's liquid port sealing structure and a medical device having such a sealing structure are described.

 That is, a sealing structure for a liquid port of a medical device, comprising: a cylindrical wall as a liquid port formed in the medical device; and a plug body sealed in a sealed state on the cylindrical wall. The outer circumferential surface of the cylindrical wall is formed with a ridge in a direction perpendicular to the axis, and the plug body is composed of a top plate and a cylindrical body connected to the top plate, and is sealed on the back surface of the top plate. A cylindrical sealing body to be inserted in a sealed state is integrally formed on the inner peripheral surface of the cylindrical wall at the time of stopping, and a receding thin portion for allowing the protrusions to easily enter the inner peripheral surface of the cylindrical body. And a sealing structure for a liquid port of a medical device in which a concave groove is formed in which a protruding line that has entered the thin portion enters when the plug is rotated for sealing. Yes.

 [0008] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-160214

 Patent Document 2: Japanese Patent Laid-Open No. 2002-172161

 Non-Patent Document 1: DRAFT INTERNATIONAL STANDARD ISO / DIS 8637 [§ 4.4.4, § 4. 4.5, § 5.5.5, § 5.5.6, page 15 ~ 3 Figure 3, International Organization for Standardizati on, 2002]

 Disclosure of the invention

 Problems to be solved by the invention

[0009] However, in the above-described conventional example, the force bra used in dialysis as described in Non-Patent Document 1 is generally made of stainless steel and is not disposable. It was. In addition, some are made of greaves, but usually they are not thrown away, but they must be washed and sterilized before being used again. In addition, these power bras have a problem in that the structure itself is complicated, and therefore it is necessary to perform a careful sterilization treatment to suppress the growth of bacteria, and the cost is inevitably high.

 [0010] Further, in the joint of Patent Document 1, force can be used for a port including an open cylindrical portion communicating with the inside and an external cylindrical portion having a thread shape formed on the inner peripheral wall while protruding outward from the open cylindrical portion. Therefore, there is a restriction that the twist generated after being connected cannot be eliminated.

[0011] In addition, the technique of Patent Document 2 considers only sealing the liquid in the medical device. Therefore, the structure does not take into account the introduction or derivation of the external liquid. Further, Patent Document 2 has no description or even suggests a structure considering the introduction or derivation of an external liquid. Furthermore, the pressure applied during dialysis and filtration is of course not assumed and there is no description or suggestion.

 [0012] In view of the above-described problems occurring in a joint that liquid-tightly connects a liquid port of a medical device and a medical tube, the present invention can be easily attached to and detached from the liquid port of the medical device, and the tube can be freely rotated. The purpose of the present invention is to provide a joint for a medical device that can be tightly connected, has a simple structure, can be used, and can be discarded. Further, the present invention provides a use that can be easily and safely connected to a medical device. The purpose is to provide an instrument.

 Means for solving the problem

[0013] As a result of diligent research to solve the above-mentioned problems, the present inventors have found the structure of a joint for a medical device having a force bra part, a connector part, and a locking mechanism force, and have completed the present invention. Is.

[0014] That is, the first configuration of the medical device joint according to the present invention for achieving the above object includes an open cylindrical portion communicating with the inside of the medical device, and an outer peripheral surface of the cylindrical wall of the open cylindrical portion. A medical device joint for connecting a tube end to a medical device liquid port formed with a protrusion on the medical device, wherein the medical device joint has a force bra portion, a connector portion, and a lock mechanism. The force bra portion is a connecting member between the medical device liquid port and the connector portion, the outer tube connectable to the medical device liquid port, the inner tube accommodated in the outer tube, A connecting plate for airtightly connecting the inner wall intermediate portion of the outer cylinder and the outer wall of the inner cylinder, and the medical instrument liquid port side inner peripheral surface of the outer cylinder has a convexity of the medical instrument liquid port; A retracted thin portion for allowing the strip to easily enter, and the outer tube to the medical device When the protrusion is inserted into the liquid port and rotated, a concave groove is formed into which the convex line of the liquid port for the medical device is inserted, and the inner tube is formed on the inner peripheral surface of the cylindrical wall of the liquid port for the medical device. The connector portion is a connecting member between the force bra portion and the tube end portion, and has a hollow tube having a protruding stubber on an intermediate outer side. Has a function of restricting the movement in the insertion direction when the hollow tube is inserted inside the inner tube of the force bra part and liquid-tightly joining the inner tube of the force bra part. One end of the hollow tube has a structure connectable to the tube end portion, and there is a protrusion on the intermediate outer surface of the insertion portion of the force bra portion inside the inner cylinder, which is the other end of the hollow tube. The projections on the outer surface of the middle have a function of rotating and joining in a liquid-tight manner when the hollow tube is inserted into the inner cylinder of the force bra portion, and the locking mechanism includes the connector It is a mechanism for preventing detachment of the part from the force bra part.

 [0015] Further, the second configuration of the medical device joint according to the present invention is the first configuration, wherein the projection on the intermediate outer surface of the hollow tube is a circumferential projection along the outer periphery of the hollow tube. It is characterized by being.

 [0016] Further, the third configuration of the medical device joint according to the present invention is characterized in that, in the first configuration, the protrusion on the intermediate outer surface of the hollow tube is a textured surface.

 [0017] Further, in a fourth configuration of the medical device joint according to the present invention, in the first to third configurations, the lock mechanism is inserted into the inner tube of the force bra portion inside the hollow tube. A projection provided on the outer side near the tip of the portion, the projection on the outer side near the tip is the liquid port for the medical device at the tip of the inner cylinder when the hollow tube is inserted into the inner cylinder of the force bra part. It protrudes on the side surface, and has a function of preventing the hollow tube from being detached from the inner cylinder of the turnip portion in the tube side direction.

 [0018] Further, the fifth configuration of the medical device joint according to the present invention is the first to third configurations V, and the lock mechanism is detached from the force bra portion and the connector portion. The locking portion is a prevention member, and a screw is formed on the outer peripheral surface of the outer cylinder of the force bra portion on the tube side, and the locking portion can pass through one end of the hollow tube of the connector portion. However, the stocker has a cap having a through-hole that cannot be inserted, and a screw that engages with a screw formed on an outer peripheral surface of the tube side of the outer cylinder of the force bra portion on a side wall inner peripheral surface of the cap. A hollow tube of the connector part inserted into the inner cylinder of the force bra part is passed through the through hole of the lock part and rotated with respect to the force bra part while rotating the lock part. When the screw is inserted, the cap presses the stopper of the connector part. And features.

[0019] Also, a sixth configuration of the medical device joint according to the present invention is the fifth configuration, wherein a protrusion is formed on the top plate of the cap of the lock portion, and the force bra The hollow tube of the connector part inserted inside the inner cylinder of the part is passed through the through hole of the lock part. When the screw is screwed into the force bra portion while rotating the lock portion, the protrusion formed on the top plate of the cap presses the stagger of the connector portion.

[0020] Further, in the seventh configuration of the medical device joint according to the present invention, in addition to the fifth or sixth configuration, the insertion portion of the hollow tube into the inner cylinder of the force bra portion There is a protrusion on the outer side near the tip of the tube, and when the hollow tube is inserted inside the inner cylinder of the force bra part, the protrusion protrudes on the side of the liquid port for medical devices at the tip of the inner cylinder, It has a function of preventing the empty tube from being detached from the inner cylinder of the turnip portion in the tube side direction.

 [0021] Further, an eighth configuration of the joint for a medical device according to the present invention is the above-described first to seventh configurations, in which the stopper is attached to the side of the liquid port for the medical device of the stopper. There is a circumferential projection for rotating and liquid-tightly joining the inner cylinder.

 [0022] Further, in the ninth configuration of the medical device joint according to the present invention, a gasket is fitted to the tube side of the connecting plate of the force bra portion in the first to eighth configurations. It is characterized in that a gasket base is formed.

 [0023] Further, a tenth configuration of the medical device joint according to the present invention is the structure of one end of the hollow tube of the connector portion connected to the tube end portion in the first to ninth configurations. Has a structure based on IS05 94-2 standard.

 [0024] Further, in the eleventh configuration of the joint for medical device according to the present invention, in the first to tenth configurations, the medical device connected to the tube end portion by the joint for medical device includes: It is selected from human kidney, hemofiltration dialyzer, hemofilter, plasma component separator, plasma separator, ascites filter, and ascites concentrator.

 [0025] Further, the first configuration of the medical instrument according to the present invention is characterized in that the medical device joints of the first to eleventh configurations are configured integrally with the tube end. .

 [0026] Further, in the second configuration of the medical instrument according to the present invention, a portion excluding the force bra portion of the joint for a medical device having the first to eleventh configurations is integrated with the tube end portion. It is characterized by being composed.

 The invention's effect

[0027] According to the medical device joint according to the present invention, it goes without saying when connecting to the medical device. Even after connection, the tube can rotate, so the tube will not twist during operation of the medical device. In addition, the medical device joint according to the present invention can have two or three parts, and can be manufactured at low cost because of its simple structure. Further, by using the medical device joint according to the present invention, a medical device that can be easily and safely connected to the medical device can be produced.

Brief Description of Drawings

FIG. 1 is a side view illustrating a state in which a medical device joint according to the present invention is connected to a liquid port of a medical device.

 FIG. 2 is a side view illustrating that the medical device joint according to the present invention includes three parts, a force bra part, a connector part, and a lock part.

 FIG. 3 is a side view illustrating that the joint force for a medical device according to another embodiment of the present invention is composed of three parts, a S force bra part, a connector part, and a lock part.

 [FIG. 4] (a) is an external side view of the joint for medical devices according to the present invention, and (b) is a cross-sectional side view taken along the line DD of (a).

 [FIG. 5] (a) is a partial cross-sectional side view for explaining a state before joining of the medical device joint and the medical device liquid port according to the present invention, and (b) is the medical device joint according to the present invention. It is a partial cross section side view explaining the state after joining with the liquid port for medical devices.

FIG. 6 is a cross-sectional view of the joint side force for explaining the state of joining of the medical device joint and the medical device liquid port according to the present invention.

 [Fig. 7] (a) to (c) are a top view, a side view and a bottom view of the force bra part, and (d) is a cross-sectional side view taken along the line BB of (a).

 [FIG. 8] (a) to (c) are a top view, a side view and a bottom view of the connector part, and (d) is a cross-sectional side view taken along the line CC of (b).

 [FIG. 9] (a) to (c) are a top view, a side view, and a bottom view of another embodiment of the connector portion, and (d) is a cross-sectional side view taken along the line FF of (b).

 [FIG. 10] (a) to (c) are a top view, a side view, and a bottom view of the lock part, and (d) is a cross-sectional side view taken along line AA of (a).

[Fig.11] The hollow tube end structure on the medical tube connection side of the connector is IS0594-2 FIG. 6 is a side view illustrating a connection state between a medical device joint and a medical device having a structure of a medical tube end connected to the medical device joint of IS 0594-1 and a liquid port of the medical device.

 [Fig. 12] (a) to (c) are a top view, a side view, and a bottom view of a connector portion in which the hollow tube end structure on the medical tube connection side is IS0594-2. (D) is a view of (a). E—E cross-sectional side view

[FIG. 13] (a) to (c) are a top view, a side view and a bottom view of the connector part of another embodiment in which the hollow tube end structure on the medical tube connection side is IS0594-2, (d) It is a GG line section side view of (a).

 [FIG. 14] (a) is a partial cross-sectional side view illustrating a state before joining of a medical device joint and a medical device liquid port where the hollow tube end structure on the medical tube connecting side of the connector is IS0594-2 FIG. 4B is a partial cross-sectional side view for explaining a state after joining a medical device joint and a medical device liquid port in which the hollow tube end structure on the medical tube connecting side of the connector portion is IS05 942 is there.

 FIG. 15 is a side view illustrating that the joint force S for the medical device according to another aspect of the present invention is composed of two parts, a S force bra part and a connector part.

 FIG. 16 is a side view for explaining that the medical device joint according to still another aspect of the present invention is composed of two parts, a force bra part and a connector part.

Explanation of symbols

 1 ... Connecting plate

 10 ··· Medical tools

 11 ... Inlet

 12 ... Outlet

 13 · “Cap

 14 ... Medical tube end

 21 ... Inflow port

 22 ... Outflow port

23 ... Cylinder wall ... small diameter part ... annular depression a ... projection

 ... Inner peripheral surface ... Force plastic part ... Screw

 · · ·

a ... Inner perimeter b ... All-around knurl ... Inner cylinder

a ... End sealing part b ... Inner peripheral surface c ... End side of tube side ... Open end ... Outer cylinder

a… Guide… Gasket base… End

... thin part

a ... concave groove

... Guide part a ... Round

, 100 ... Connector part ... Hollow tube large diameter part ... Stopper

a ... Small diameter side b ... Large diameter side ... Hollow tube small diameter 43a, 43b… Circular projection

 43c-'Rough textured surface

 43d '' 'Dense textured surface

 50

 51.

 52.-Protrusions

 53-Screw

 54 ...

 60,200 ... Fittings for medical devices

 70,210… Fittings for medical devices

 81 ... Lock ring

 81a ... Screw

 82 ... Hollow tube

 91 ··· Teno Minoh

 92 ... Protrusions

 BEST MODE FOR CARRYING OUT THE INVENTION

 [0030] Hereinafter, an embodiment of a joint for medical devices and a medical instrument according to the present invention will be specifically described with reference to the drawings.

 [0031] When the direction is described using the top and bottom in the following description, the medical device joint and the medical device tube are in a posture in which the medical device is positioned with the medical device liquid port facing up. Is the vertical direction when connected. In the present invention, the “tube side” of the force bra part, connector part, or lock part of the joint for medical equipment means that the tube is connected when the joint is connected to the liquid port of the medical equipment and the tube of the medical equipment. Similarly, the “liquid port side” refers to a portion closer to the liquid port. Therefore, in the present invention, “upper” means “tube side” and “lower” means “liquid port side”.

[0032] The medical device 10 to which the present invention is applied is a medical device 10 used for extracorporeal circulation treatment of a bodily fluid represented by blood or plasma. As an example, as described above, an artificial kidney, blood Examples thereof include a filtration dialyzer, a hemofilter, a plasma component separator, a plasma separator, an ascites filter, and an ascites concentrator. Such a medical device 10 can be used for medical purposes by the medical device joint 60 according to the present invention. Connected to tube end 14.

[0033] When a medical device fluid port performs extracorporeal circulation treatment of a body fluid, a physiological solution is flowed to collect the body fluid, a body fluid itself is circulated, or a dialysis fluid is flowed. At that time, the fluid port for medical devices is accompanied by the inflow and outflow of fluid such as body fluid, and the connector connecting the medical device liquid port and the medical tube has high pressure-tightness. Therefore, the medical device joint 60 according to the present invention is preferably used.

 In FIG. 1, a medical device 10 is, for example, an artificial kidney in which a hollow fiber or the like is accommodated, and an inflow port 11 and an outflow port 12 for blood or the like in the axial direction (longitudinal direction) of the medical device 10 An inflow port 21 and an outflow port 22 for other fluids such as dialysate are provided on the peripheral surface in the vicinity of both ends of the cylinder. A conventionally known cap 13 is detachably attached to the inflow port 11 and the outflow port 12, and the inflow port 21 and the outflow port 22 that are liquid ports for medical devices are connected to the medical device joint 60 according to the present invention. Is crowned in close contact.

 [0035] The inflow port 21 and the outflow port 22 are configured in the same shape, and the same medical device joint 60 to be covered therewith is used. Therefore, in the following description, an example in which the medical device joint 60 is crowned on the inflow port 21 will be described as an example of the medical device liquid port.

 [0036] As shown in Figs. 2 and 3, the medical device joint 60 is composed of three parts: a force plastic part 30, a connector part 40, and a lock part 50 constituting a lock mechanism. Assemble as shown. For example, first, the hollow tube small diameter portion 43 of the connector portion 40 is inserted into the inner cylinder 33 of the force bra portion 30, and the lock portion is inserted into the through hole 54 of the lock portion 50 through the hollow tube large diameter portion 41 of the connector portion 40. Just screw in 50. As the material for the force plastic part 30, olefin-based materials, polyethylene, polypropylene, etc. are preferred. The lock part 50 constituting the lock mechanism is a detachment prevention member for the force bra part 30 and the connector part 40, and the lock mechanism is a detachment prevention mechanism for the connector part 40 from the force bra part 30.

[0037] In the inner cylinder of the force bra portion 30 which is the other end of the connector portions 40, 100 to be hollow tubes in the present invention The protrusion provided on the intermediate outer surface of the hollow tube small-diameter portion 43 serving as the insertion portion on the side is basically a conical shape, and has a shape whose width decreases in the height direction. To tell. If the height of the protrusion is too high, the adhesion cannot be maintained and leakage occurs. If the height is too low, the degree of adhesion increases, the resistance increases, and the connector can rotate freely. It becomes impossible to do it. Therefore, the height of the protrusion is 1 μm or more and 100 μm or less, preferably 10 μm or more and 50 m or less.

 [0038] Regarding the presence of the protrusions, the contact area between the protrusions and the force bra part is advantageously small as the connector part is rotated. Further, in order to increase the degree of adhesion, it is advantageous to arrange the front surface without any gap. The following explains the existence of protrusions that exert an effect of balancing the conflicting performance.

 [0039] Examples of the shape of the protrusion are given below. Figures 4 (a) and 4 (b) show the appearance and structure of the medical device joint 60 after assembly. As shown in FIG. 8, the hollow tube is formed on the intermediate outer surface of the small-diameter portion 43 of the hollow tube serving as the insertion portion inside the inner tube 33 of the cover portion 30 of the connector portion 40 formed of a hollow tube. There is a circumferential projection 43a along the outer periphery of the hollow tube small diameter portion 43, and when the hollow tube small diameter portion 43 force S force bra portion 30 is inserted into the inner tube 33 inside, the inner periphery of the inner tube 33 The surface 33b and the projecting portion of the circumferential projection 43a are in contact with each other and are formed so as to be rotatable and liquid-tightly joined.

 [0040] Here, the circumferential protrusion 43a means one that protrudes in a circular shape along the outer peripheral surface of the small-diameter portion 43 of the hollow tube. The number of the circumferential protrusions 43a may be any number as long as it is one or more, but is preferably one, and more preferably two. When there are two or more circumferential protrusions 43a, the circumferential protrusions 43a may not be independent of each other. For example, if the ridges of the circumferential protrusions 43a overlap, the vertices exist independently!

 [0041] Further, if the circumferential projection 43a can be in uniform contact with the inner circumferential surface 33b of the inner cylinder 33, as shown in FIG. It may be a circular protrusion 43a having a sharp point. However, if the area where the circumferential protrusion 43a is in contact with the inner peripheral surface 33b of the inner cylinder 33 is too large, it is not preferable because the frictional resistance is increased and the rotational performance is lowered.

In another aspect according to the present invention, as shown in FIG. 9, a hollow tube small-diameter portion 43 that serves as an insertion portion of the force plastic portion 30 of the connector portion 100 formed of a hollow tube into the inner cylinder 33. The outer surfaces 43c and 43d are Each has a rough and dense texture surface, and when inserted into the inner cylinder 33 of the force plastic portion 30, it is joined to the inner peripheral surface 33b of the inner cylinder 33 in a freely rotatable and liquid-tight manner. ing. In other words, the protrusions on the intermediate outer surfaces 43c and 43d of the hollow tube small diameter portion 43 of the connector portion 100 to be a hollow tube are formed with a textured surface.

 [0043] Here, wrinkle is a technique for making fine irregularities and is a term generally used in injection molding. The advantage of using a textured surface is that it is relatively easy to achieve both liquid-tightness and rotation without increasing the accuracy of the parts. For example, when using parts that do not have a textured surface, high parts accuracy is required to improve liquid tightness. Finding close contact so that no gap is created increases the frictional resistance and makes rotation difficult. If the accuracy is such that a gap is created, rotation is easy, but liquid tightness cannot be maintained, and liquid leakage occurs.

 [0044] The grain is sprayed with sand of uniform size on the surface of the molding die (sand blasting), or! Is made by applying electrical discharge machining to create fine irregularities on the surface of the molding die with fine scratches. The machining conditions for electrical discharge machining are set based on the state of embossing by sandblasting. Shibo does not have a unified standard such as an industrial standard, and each manufacturer has its own standard, and the standard is determined based on the surface condition of the sample. Factors that control the roughness and depth of the textured surface are the amount of sand to be blown and the pressure at the time of blowing in sandblasting, and the distance from the surface of the discharge electrode to the mold, The moving speed, voltage, and current of the discharge electrode along the surface.

 [0045] Basically, the embossing is controlled by the depth of the groove, in other words, by the convex height of the surface of the molded product. Sand used for sandblasting is an abrasive specified by JIS R6001 abrasive particle size. The grain size and depth of the JIS standard have a correlation, and the grain size of the abrasive is determined by determining the groove depth. For example, abrasive grain size # 46 is used for 7 to 10 microns, abrasive grain size 20 for 30 microns, and abrasive grain size 14 for 50 microns. The rough and dense states appearing on the surface correlate with the size of the abrasive grains, with shallow grooves having surface dense wrinkles and deep grooves having surface rough wrinkles.

[0046] The height of the fine protrusions on the surface of the molded product thus formed is 10 microns to 50 microns. About Ron. The height of the convex part of the rough textured surface is 20 to 50 microns, preferably 20 microns and 30 microns. The height of the convex portion of the dense embossed surface is 10 to 30 microns, preferably 10 to 20 microns.

 [0047] The arrangement order of the rough texture surface and the dense texture surface is not particularly limited, but it is more preferable that the stopper 42 side is rough and the end portion side is dense. Further, the ratio of the rough texture surface and the dense texture surface to the outer surfaces 43c, 43d of the hollow tube small diameter portion 43 is not particularly limited. Non-textured surfaces may also be included. Preferably, the proportion of the rough textured surface in the outer surfaces 43c and 43d of the hollow tube small diameter portion 43 is 50%, and the ratio of the dense textured surface is 50%.

 [0048] The dense embossed surface is a force that contributes to improving the liquid tightness between the hollow tube of the connector part 100 and the inner tube 33 of the force plastic part 30. The rotation of the bra part 30 with the inner cylinder 33 works obstructively. On the other hand, the rough textured surface reduces the force-liquid tightness that contributes to improving the pivotability of the hollow tube of the connector portion 100 and the inner tube 33 of the force bra portion 30. Therefore, it is only necessary to select the optimal ratio according to the purpose by changing the ratio of both.

 [0049] There is a circumferential protrusion 43b on the outer side of the inner tube 33 of the inner portion of the inner tube 33 of the force bra portion 30 of the hollow tube small diameter portion 43 to be a hollow tube. Is inserted into the inner tube 33 of the force bra portion 30, the circumferential projection 43 b protrudes on the side of the medical device liquid port at the tip of the inner tube 33 of the force bra portion 30, and the hollow tube The hollow tube small-diameter portion 43 is prevented from detaching from the inner tube 33 of the turnbuckle portion 30 in the tube side direction.

 That is, when the force bra part 30 and the connector part 40 are connected at one end, the connector part 40 does not come out even when pulled. A hollow projection 43b provided on the outer side near the front end of the insertion portion to the inside of the inner tube 33 of the force bra portion 30 of the hollow tube small-diameter portion 43 serving as a hollow tube is connected to the force bra portion 30 of the connector portion 40. It is configured as a lock mechanism as a mechanism for preventing detachment from the body.

[0051] The circular protrusion 43b may have any shape as long as it can prevent the hollow tube small-diameter portion 43 serving as a hollow tube from being separated from the inner tube 33 of the turnbuckle portion 30, but is preferably as described above. This is a circumferential protrusion 43b similar to the circumferential protrusion 43a that protrudes in a circular shape along the outer peripheral surface of the hollow tube small-diameter portion 43. Further, in the medical device joint 60 having the lock portion 50, since the detachment of the connector portion 40 and the force bra portion 30 can be prevented by the lock portion 50, the circumferential protrusion 43b may be omitted. [0052] By adopting the structure as described above, twisting of the medical instrument tube that often occurs when the medical instrument is attached to the medical instrument 10 can be eliminated. The connector part 40 is composed of independent parts, and this part rotates to connect the medical instrument tube! Even if the tube is restored, the twisting is eliminated by the restoring force of the tube. . The hollow tube large-diameter portion 41, which is one end portion of the connector portion 40 having a hollow tube force, has a structure that can be connected to the medical tube end portion.

 [0053] The connector portion 40, which is a connecting member between the force bra portion 30 and the medical tube end portion 14, has a stopper 42 that protrudes outside the outer peripheral intermediate portion of the hollow tube. The stopper 42 restricts movement in the insertion direction when the connector portion 40 made of a hollow tube is inserted into the inner tube 33 of the force bra portion 30 and is joined to the inner tube 33 of the force bra portion 30 in a liquid-tight manner. It has a function.

 [0054] The degree of joining of the small-diameter side surface 42a of the stopper 42 and the tube side end surface 33c of the inner cylinder 33 of the force plastic portion 30 is important for the liquid tightness between the connector portion 40 and the force plastic portion 30. The small diameter side surface 42a of the stopper 42 and the tube side end surface 33c of the inner cylinder 33 of the force plastic portion 30 are brought into contact with each other, and the large diameter side surface 42b of the stagger 42 is pressed by the lock portion 50 to make it liquid-tight. I can do it. In order to further improve the liquid tightness, a gasket may be fitted into a gasket base 36 provided on the tube side of the connecting plate 1 of the force bra portion 30 shown in FIG.

 [0055] Further, a circumferential shape (not shown) for joining the stopper 42 to the inner tube 33 of the force bra portion 30 in a rotatable and liquid-tight manner on the side surface 42a of the small-diameter portion serving as the side surface of the liquid port for the medical device of the stopper 42. Protrusions can also be provided.

 [0056] The gasket is a disk-shaped seal, and the material is polytetrafluoroethylene (PTFE) or fluorine-based soot typified by tetrafluoroethylene 'perfluoroalkyl butyl ether copolymer (PFA). A material having slidability such as fat or silicone resin is used. As described above, it is possible to keep liquid-tight without using a gasket.

 [0057] In this case, the bottom surface of the gasket pedestal 36 of the force plastic part 30 is pulled up to the same height as the tube side end face 33c of the inner cylinder 33 to make it the same plane, and the contact area with the small diameter side surface 42a of the stopper 42 of the connector part 40 Is maximized.

[0058] The material of the stopper 42 and the tube side end surface 33c of the inner cylinder 33 is important. The stopper 42 must be made of a hard material. In addition, the outer peripheral surface of the large-diameter portion 41 of the hollow tube or Acrylonitrile-butadiene-styrene (ABS) resin, hard polyvinyl chloride (hard PVC), which is preferred to be a relatively hard material that can be dissolved in a solvent. ), Polycarbonate resin, etc. are preferred. The material of the tube side end surface 33c of the inner cylinder 33 is preferably a relatively soft material, for example, an olefin-based material, polyethylene, polypropylene or the like.

 In the stopper 42, the large-diameter side surface 42b is pressed by the lock portion 50, and the tube side end surface 33c of the inner cylinder 33 and the small-diameter side surface 42a are brought into close contact with each other. At this time, if the stopper 42 is soft, it is distorted by the pressing force of the lock portion 50, and the degree of adhesion between the tube side end surface 33c of the inner cylinder 33 and the small diameter side surface 42a of the stopper 42 decreases. In addition, in order to maintain adhesion to the seal ring, the stopper 42 is hard, so that a pressing force can be uniformly applied to the entire circumferential surface. The tube side end surface 33c of the inner cylinder 33 uses a soft material to disperse the pressing force. Thereby, the liquid tightness between the small diameter side surface 42a of the stopper 42 of the connector portion 40 and the tube side end surface 33c of the inner cylinder 33 of the force plastic portion 30 may be increased. In addition, when the small diameter side surface 42a of the stopper 42 is in close contact with the tube side end surface 33c of the inner cylinder 33, if the pivotability of the connector portion 40 is significantly reduced, it is not shown on the small diameter side surface 42a of the stopper 42. Circumferential protrusions may be provided to reduce the contact area and improve the turning performance.

 The lock part 50 is a member for preventing the detachment between the force plastic part 30 and the connector part 40. The hollow tube large-diameter portion 41 serving as one end of the hollow tube of the connector portion 40 can pass through, but the stopper 42 also has a cap force having a through hole 54 that cannot pass through. A screw 53 is formed on the inner peripheral surface of the side wall of the cap. The screw 53 is screwed to the screw 31 formed on the outer peripheral surface of the outer cylinder 35 of the force plastic portion 30.

 [0061] A protrusion 52 is formed on the inner side of the top plate of the lock portion 50 having a cap force, and the hollow tube of the connector portion 40 inserted into the inner cylinder 33 of the force plastic portion 30 is connected to the through hole of the lock portion 50. When the lock part 50 is screwed into the force bra part 30 while passing through 54 and screwed into the force bra part 30, the protrusion 52 formed on the inner side of the top part of the lock part 50 presses the stopper 42 of the connector part 40.

[0062] Further, as shown in FIG. 4 (b), when the lock portion 50 is screwed into the force bra portion 30, the small diameter portion of the stopper 42 of the connector portion 40 is pressed by pressing the stopper 42 with the protrusion 52. The side surface 42a and the tube side end surface 33c of the inner cylinder 33 of the force bra portion 30 are brought into close contact with each other to keep them both liquid-tight. As a result, when the stopper 42 is pressed against the inner cylinder 33 of the force bra 30, it has a function of joining liquid tightly. Have.

 As shown in FIG. 10, the screw 53 formed on the inner peripheral surface of the lock portion 50 and the screw 31 formed on the outer peripheral surface of the outer cylinder 35 of the force plastic portion 30 are screwed together. It is formed like this! It can be right-handed or left-handed!

 [0064] When connecting the fluid port of the medical device 10 and the force bra portion 30, the force bra portion 30 is rotated in the right-handed screw direction, so it is more preferable that the lock portion 50 and the force bra portion 30 are also right-handed. Further, the shape of the present embodiment is not limited as long as the anti-slip 51 is provided around the mouth portion 50 as long as it functions as a non-slip.

 FIGS. 5 and 6 show the joined state of the medical device joint 60 and the inflow port 21 according to the present invention. The inflow port 21 serving as the liquid port for the medical device has an open cylindrical portion communicating with the inside of the medical device 10, and a protrusion 26 a is formed on the outer peripheral surface of the cylindrical wall 23 of the open cylindrical portion. The medical device joint 60 is used to connect the medical tube end 14 to the inflow port 21 serving as a medical device liquid port.

 [0066] The inflow port 21 has a cylindrical wall 23, a small-diameter portion 24 at the tip, and an annular recess 25 on the base side. This annular depression 25 is used to stabilize the connection by allowing a part of the device to enter when connecting to other devices. A predetermined number of ridges 26a are formed in a body at a position slightly closer to the medical device 10 than the annular depression 25 on the outer peripheral surface of the cylindrical wall 23. In the present embodiment, two ridges 26a are formed.

 [0067] In the side view of Fig. 5 (a), only one ridge 26a is visible in front, but another ridge 26a is formed on the opposite side (back side) with the cylinder in between (Fig. 6). reference). The ridge 26a is disposed in the same plane perpendicular to the axis of the inflow port 21 and has a rib shape extending in a direction perpendicular to the axis.

[0068] In the case where the medical device joint 60 according to the present invention is connected to the medical device liquid port of the medical device 10, the annular depression 25 is not essential. Further, in the medical device joint 60 according to the present invention, the structure of the cylindrical wall 23 formed as a medical device liquid port on the medical device 10 side is arbitrary, and the medical device joint 60 can be crowned and its outer periphery. There is no particular limitation as long as the ridges 26a are formed on a part of the surface. Further, the ridge 26a may be a cylindrical protrusion, but considering the strength, A rib shape in a direction perpendicular to the axis as shown is preferable.

 [0069] The force bra portion 30 is a connecting member between the medical device liquid port and the connector portion 40, and includes an outer cylinder 32 connectable to the medical device liquid port, and an inner cylinder 33 accommodated in the outer cylinder 32. The intermediate portion of the inner wall of the outer cylinder 32 and the outer wall of the inner cylinder 33 are hermetically coupled by the connecting plate 1.

 [0070] The medical device liquid port side inner peripheral surface 32a of the outer cylinder 32 is an expanded and retracted thin portion 38 for allowing the protrusion 26a of the inflow port 21 to be a medical device liquid port to easily enter 38. Then, when the outer cylinder 32 is fitted into the inflow port 21 serving as a medical device liquid port and rotated, a concave groove 38a into which the ridge 26a of the inflow port 21 enters is formed. A screw 31 is formed on the outer peripheral surface of the outer cylinder 32 on the tube side.

 As shown in FIG. 5, when the force bra part 30 is crowned and connected to the inflow port 21, the inner cylinder 33 of the force bra part 30 is inserted into the inflow port 21 and the tip of the inner cylinder 33 is inserted. The sealing portion 33a and the inner peripheral surface 27 of the cylindrical wall 23 of the inflow port 21 are in close contact with each other and inserted in a liquid-tight manner. At this time, the guide 35a functions to hold the inflow port 21 in place and keep it from moving.

 [0072] A thin portion 38 is formed on the opening side of the inner peripheral surface 32a of the outer cylinder 32 of the force plastic portion 30, and a number corresponding to the ridge 26a of the inflow port 21 with an equal interval therebetween. Only (two in the present embodiment) is formed with ridges 39a. A concave groove 38a is formed between the convex line 39a and the step-shaped guide part 39. The concave groove 38a is formed in a direction perpendicular to the axis of the inflow port 21 and in the same plane perpendicular to the axis. The length of the ridge 39a or the groove 38a is equal to or slightly longer than the length of the ridge 26a of the force bra part 30, and the width of the groove 38a in the axial direction (D-D direction in Fig. 4 (a)) is It is formed to be equal to or slightly wider than the width of the ridge 26a of the force plastic portion 30.

[0073] One end 37 of the concave groove 38a is closed. The thin portion 38 is an intrusion portion of the ridge 26a of the inflow port 21, and reaches the open end 34 over at least the length of the ridge 26a. As shown in FIG. 6, the diameter of the imaginary circle connecting the inner peripheral surface of the thin portion 38 is set to be approximately equal to the diameter of the imaginary circle connecting the tip surface of the ridge 26a. Further, the guide portion 39 of the thin portion 38 serves as a guide surface for guiding the ridge 26a to the concave groove 38a. When the force bra portion 30 and the inflow port 21 are joined, the force bra portion 30 is rotated. Accordingly, the protrusion 26a of the inflow port 21 that has entered from the thin portion 38 from the open end 34 side of the force bra portion 30 is recessed along the guide surface formed by the guide portion 39. Induced to a.

 [0074] The ridge 26a that has entered the groove 38a cannot be moved in the axial direction by being sandwiched between the ridge 39a of the force bra portion 30 and the guide portion 39. The guide portion 39 extends a predetermined distance in a direction perpendicular to the axis of the inflow port 21, that is, in the horizontal direction, and may be configured to end as a vertical wall in the axial direction.

 [0075] At the time of joining the medical device joint 60, the force bra 30 is covered with the upward force of the inflow port 21 and pressed to the medical device 10 with some force. As the pressure is applied, the inner cylinder 33 of the force bra part 30 is inserted into the inflow port 21, and the tip sealing part 33a of the inner cylinder 33 and the inner peripheral surface 27 of the inflow port 21 are brought into close contact with each other. Further, by pushing the force bra portion 30 by a predetermined distance, the open end portion 34 of the force bra portion 30 reaches the position of the ridge 26a of the inflow port 21. At this position, the medical device joint 60 is rotated so that the ridge 26a and the thin portion 38 of the force bra portion 30 are opposed to each other.

 [0076] When the medical device joint 60 is further pushed in at that position, the protrusion 26a of the inflow port 21 enters the thin portion 38. By rotating the joint 60 for a medical device together with the pushing, the ridge 26a is slid into the concave groove 38a while being guided by the guide portion 39 of the thin portion 38. Since the concave groove 38a has a closed end portion 37, the rotation stops when one end of the ridge 26a contacts the end portion 37, and the connection between the medical device joint 60 and the inflow port 21 is completed.

 [0077] When separating the medical device joint 60, similarly, the entire circumference knurled 32b of the outer cylinder 32 of the force bra portion 30 is picked and rotated clockwise by a predetermined angle so that the ridge 26a becomes a groove 38a. When the thin part 38 is reached, the separation operation is completed simply by pulling up the medical device joint 60 in the axial direction of the inflow port 21. The entire circumferential knurl 32b means that the entire circumferential surface has a jagged shape and is mainly attached as a non-slip to the outer periphery of the round object, but if it has a non-slip function, it is limited to the shape of this embodiment. It's not something.

Therefore, the operation for joining and separating the joint 60 for a medical device can be performed in a state where the outer cylinder 32 of the force bra portion 30 is picked, and there is no possibility of touching the inflow port 21 at all. Further, since the medical device joint 60 is made of a relatively hard material, it is easy to connect the medical device joint 60 without causing deformation. In addition, as described above, since the ridge 26a of the inflow port 21 enters the concave groove 38a of the force bra portion 30 in the connected state, the medical device joint 60 does not move freely in the axial direction of the inflow port 21. Absent. Therefore, the internal pressure in the medical device 10 is increased. Even if the temperature rises or the pressure is reduced, the medical device fitting 60 is not inadvertently disconnected or the liquid-tight state is not destroyed.

 In the above-described embodiment, two or more forces that are formed on the outer peripheral surface of the cylindrical wall 23 forming the inflow port 21 may be formed. In that case, the load generated between the inflow port 21 and the medical device joint 60 generated at the time of joining can be evenly distributed to more places, and the internal pressure increases greatly as well as at the time of ordinary close joining. In this case, a stable connection state can be maintained even when the pressure is reduced or the liquid-tight state can be more effectively prevented.

 [0080] As another embodiment of the connector portion 40 connected to the medical tube end portion 14, the structure of one end portion of the hollow tube of the connector portion 40 connectable to the medical tube end portion 14 is IS059 4 — A configuration having a structure based on two standards may be used. That is, as shown in FIG. 12, the end structure of the large-diameter portion 41 of the hollow tube of the connector portion 40 can be based on the IS0594-2 standard. In such a structure, the end of the hollow tube There are protrusions 92, and the inner wall surface of the hollow tube is a tapered surface 91.

 [0081] As shown in FIG. 14, the structure of the medical tube end portion 14 coupled to the hollow tube of the connector portion 40 having a structure in which one end portion has a structure based on the IS0594-2 standard is IS0594 1 The structure is based on a standard, and such a structure is configured with a lock ring 81 and a hollow tube 82, and a screw 81a into which a projection 92 at the end of the hollow tube is screwed inside the lock ring 81. Is formed.

 [0082] When connecting the connector portion 40 and the medical tube end portion 14, first, the distal end force of the hollow tube 82 S enters the hollow tube large-diameter portion 41 of the connector portion 40 and further pushes into the connector. The protrusion 92 at the end of the large diameter portion 41 of the hollow tube 41 of the portion 40 enters the space between the lock ring 81 and the hollow tube 82 of the medical tube end portion 14. Next, when the medical tube end portion 14 is rotated, the projection 92 at the end of the hollow tube large-diameter portion 41 is formed inside the medical tube end portion 14 along the screw 81a formed on the inner side of the lock ring 81. The connection is completed in the state shown in Fig. 14 (b).

[0083] In such a connection, since the connector 40 and the medical tube end 14 are screwed, it is safer to remove them easily. In extracorporeal circulation treatment, a special device and medical instrument are usually used according to the treatment. If it is set to 2, the choices of medical instruments that can be connected to the joint 60 for medical instruments of the present invention will increase, and it can be expected that the options of treatment methods will expand accordingly. Furthermore, in the medical device joint 60 according to the present invention, since the connector portion 40 freely rotates, the medical tube can be twisted even in the case of this embodiment in which the medical tube end portion 14 is connected while rotating. Absent.

 [0084] The medical device joint 60 according to the present invention may be used as a joint for connecting a medical device and the medical device 10 by sterilizing and wrapping the joint alone, or for a medical device. The joint 60 may be sterilized and packaged integrally with the medical device with the joint 60 connected to the medical device. That is, the medical instrument joint 60 can be a medical instrument configured integrally with the medical tube end 14. In addition, a medical instrument in which a portion excluding the force bra portion 30 of the medical device joint 70 is configured integrally with the medical tube end portion 14 may be used.

 [0085] Alternatively, only the connector part 40 and the lock part 50, which are a part of the medical device joint 60, may be used by being sterilized and packaged integrally with the medical device in a state where the medical device is connected. In other words, the medical device in which the connector portion 40 and the lock portion 50 provided on the medical device joint 60 are integrally formed with the medical tube end portion 14 can be obtained.

 [0086] Here, the medical device refers to an artificial kidney, a blood filtration dialyzer, a blood filter, a plasma component separator, plasma, which are medical devices used for extracorporeal circulation treatment of body fluids typified by blood and plasma. It refers to the blood circuit required when using a separator or the like. The blood circuit includes an arterial line, a venous line, a filtration line, a dialysate line, a replacement fluid line, and the like. However, the blood circuit is mainly used together with the medical device joint according to the present invention. Dialysate line and replacement fluid line. The filtration line is a tube for draining excess water and components in body fluids from the fluid port of medical devices, and the dialysate line is for injecting dialysate from a container containing dialysate into the fluid port. Usually, polychlorinated bull tubes are used. The replacement fluid line is a tube for injecting a replacement fluid containing necessary components and water.

[0087] As another aspect according to the present invention, as shown in Figs. 15 and 16, a medical device which is composed of a force bra portion 30 and connector portions 40 and 100 and does not have the lock portion 50 described above. There are joints 70 and 210. In the case of the medical device joints 70 and 210, the force bra part 30 is connected to the lock part 50. It is not necessary to have a function, so the screw 31 on the outer periphery of the force plastic part 30 as shown in Fig. 2 may or may not be present. In the joints 60 and 200 for the medical device having the lock part 50, a force that has a good force even if the circumferential protrusions 43b of the connector part 40 and 100 are not present. The protrusion 43b is essential. Except for the above points, the structures of the connector portions 40 and 100 of the medical device joints 60 and 200 and the medical device joints 70 and 210 and the force plastic portion 30 may be the same. The feature of medical device fittings 70 and 210 is that the number of parts is only 2 V, which is simpler in structure and more suitable for disposal than medical device fittings 60 and 200.

[Example 1]

 <Texture processing of connector mold>

 As described above, each manufacturer has its own standard for grain, and the standard is determined based on the surface condition of the sample. In this example, the rough textured surface (outer surface 43c in Fig. 9) entrusted to Fujita Metal Industry Co., Ltd. is shown in the standard of Fujita Metal Industry Co., Ltd. and is equivalent to RM34. (Outer surface 43d in Fig. 9) corresponds to the sample RM36 shown in the above standard.

 [0089] The molding die was subjected to sanding by the sand blast method. The outer surface 43d, which is a dense textured surface of RM36, uses an abrasive with a grain size of # 46 so that the depth is 10 microns, and the outer surface 43c, which is a rough textured surface of RM34, has a depth of 30 An abrasive with an abrasive grain size of # 20 was used to achieve a micron. The abrasive was sprayed using a blasting machine (blast cabinet B-3T suction type) manufactured by Atsuji Steel Co., Ltd., with a compressed air pressure of 392.4 kPa and an injection angle of 90 degrees.

 [Example 2]

 <Leak test>

Connect the joint 60 for medical devices according to the present invention to the dialyzer APS (manufactured by Asahi Kasei Medical Co., Ltd.) for artificial dialysis, and connect the connector part 40 with an inner diameter of 50 mm and an outer diameter of 3.4 mm X outer diameter of 5.1 mm The salty tube tube was bonded with an adhesive. Compressed air was pressed into the vinyl chloride tube through a pressure reducing valve with a compressor at a predetermined pressure, and submerged in a water tank to check for air leaks. The pressure was 0.15 MPa. [0091] When the above test was performed on the medical device joints 60 and 200 without a gasket, leakage was strong up to 0.15 MPa. A similar test was conducted on the medical device joints 60 and 200 having gaskets on the gasket base 36, and there was no leakage up to 0.15 MPa. Further, when the above test was conducted with the lock 50 removed, there was no leakage up to 0.15 MPa.

 [0092] Medical device 10 generally used for treatment of extracorporeal circulation of body fluids, for example, artificial kidney, blood filtration dialyzer, blood filter, plasma component separator, plasma separator, leukocyte remover, blood component adsorber The equivalent pressure is 400mmHg ~ 500mmHg (about 53.3kPa ~ 66.7kPa). Therefore, from the above test results, the medical device joints 60 and 200 according to the present invention or the medical device joints 60 and 200 (equivalent to the medical device joints 70 and 210) with the lock 50 removed are used as medical devices. It was shown that it has sufficient pressure resistance.

 [0093] <Tensile strength test>

 A dial for artificial dialysis APS (manufactured by Asahi Kasei Medical Co., Ltd.) is connected to the joints 70 and 210 for medical devices according to the present invention, and 70 and 210 for medical devices. 50 mm inner diameter 3.4 mm X outer diameter 5. A 1 mm vinyl chloride tube was bonded with an adhesive.

 [0094] In a connected state, a load was applied to the tube side, and the state of holding for 1 minute and releasing was confirmed. The load was 14.7N, 19.6N, 24.5N, 29.4N, 34.3N. It was confirmed that the medical device joints 60 and 200 had sufficient tensile strength to prevent the medical device joints 70 and 210 from coming off even when the load force was 33.4N.

Therefore, if the medical device joints 60 and 200 or the medical device joints 70 and 210 are used, the liquid port of the medical device 10 and the medical tube end 14 can be connected in a liquid-tight manner. At this time, or after the connection, the medical tube is not twisted. Also, it does not easily come off the medical device 10. Further, the medical device joints 60 and 200 or the medical device joints 70 and 210 of the present invention can be easily connected to or disconnected from the liquid port by rotating with the force bra 30 so that the liquid port is touched. There is no need, so it is safe. The medical device joints 60 and 200 according to the present invention, and the medical device joints 70 and 210 have a simple structure, so that they can be made into inexpensive disposable products. There is no need for disinfection and it is hygienic and safe.

Industrial applicability

 As an application example of the present invention, the present invention can be applied to a medical device joint and a medical device for liquid-tightly connecting a liquid port of a medical device and a medical tube.

Claims

The scope of the claims  [1] A medical device for connecting an end of a tube to a liquid port for a medical device having an open cylindrical portion communicating with the inside of the medical device and having a protrusion formed on the outer peripheral surface of the cylindrical wall of the open cylindrical portion A fitting for a medical device,  The medical device joint has a force bra part, a connector part, and a lock mechanism,  The force bra portion is a connection member between the medical device liquid port and the connector portion,  An outer cylinder connectable to the liquid port for the medical device, an inner cylinder accommodated in the outer cylinder, a connecting plate for airtightly coupling the inner wall intermediate portion of the outer cylinder and the outer wall of the inner cylinder, On the inner peripheral surface of the outer tube on the medical device liquid port side, a retracted thin portion for allowing the protrusions of the medical device liquid port to easily enter, and the outer tube on the medical device liquid port. When fitted and rotated, a concave groove is formed into which the convex line of the liquid port for medical device enters, and the inner cylinder is liquid-tight on the inner peripheral surface of the cylindrical wall of the liquid port for medical device. Formed to be inserted,  The connector portion is a connecting member between the force bra portion and the tube end portion, and has a hollow tube having a protruding stubber on an intermediate outer side, and the stubber attaches the hollow tube to the force bra portion. Structure that restricts movement in the insertion direction when inserted into the inner cylinder and has a function of liquid-tightly joining to the inner cylinder of the force bra part, and one end of the hollow tube is connectable to the tube end There is a protrusion on the intermediate outer surface of the insertion portion of the force bra portion, which is the other end of the hollow tube, into the inner cylinder, and the protrusion on the intermediate outer surface is connected to the force tube by the hollow tube. And a function of joining in a fluid-tight manner when inserted into the inner cylinder of the part, wherein the locking mechanism is a mechanism for preventing the force bra part force of the connector part from being detached. Joint for medical equipment.  [2] The medical device joint according to claim 1, wherein the protrusion on the intermediate outer surface of the hollow tube is a circumferential protrusion along the outer periphery of the hollow tube. [3] The medical device joint according to claim 1, wherein the projection on the intermediate outer surface of the hollow tube is a textured surface. [4] The locking mechanism is provided with a distal end of an insertion portion inside the inner tube of the force bra portion of the hollow tube. Protrusions provided near the outside, wherein the protrusions near the tip are located on the side of the liquid port for the medical device at the tip of the inner tube when the hollow tube is inserted into the inner tube of the force bra part. The medical device joint according to any one of claims 1 to 3, which has a function of protruding and preventing the hollow tube from being detached from the inner cylinder of the turnip portion in the tube side direction. hand.  [5] The lock mechanism is a lock portion that is a detachment preventing member between the force bra portion and the connector portion,  A screw is formed on the tube-side outer peripheral surface of the outer cylinder of the force bra portion, and the lock portion is a force that allows one end of the hollow tube of the connector portion to pass through. A screw is formed on the inner peripheral surface of the side wall of the cap. The screw is screwed into a screw formed on the outer peripheral surface of the outer tube of the force bra portion on the tube side. When the hollow tube of the connector portion inserted inside the cylinder is passed through the through hole of the lock portion and screwed into the force bra portion while rotating the lock portion, the cap is moved to the connector portion of the connector portion. The joint for a medical device according to any one of claims 1 to 3, wherein the stopper is pressed.  [6] A protrusion is formed inside the top plate of the cap of the lock portion, and the hollow tube of the connector portion inserted into the inner cylinder of the force bra portion is used as the through hole of the lock portion. The protrusion formed on the top plate of the cap presses the stocker of the connector portion when threaded and screwed into the force bra portion while rotating the lock portion. A joint for medical devices as described in 1.  [7] There is a protrusion on the outer side near the tip of the insertion portion of the hollow tube into the inner tube of the force bra portion, and when the hollow tube is inserted into the inner tube of the force bra portion, The protrusion protrudes on the side of the liquid port for medical devices at the end of the inner cylinder, and has a function of preventing the hollow tube from being detached from the inner cylinder of the turnip portion in the tube side direction. 5. The medical device fitting according to any one of 5 or Claim 6. 8. The medical device according to claim 8, wherein a circumferential projection is provided on a side surface of the liquid port for the medical device of the stocker to rotatably and liquid-tightly join the stocker with the inner cylinder of the force bra part. The joint for medical devices of any one of 1-7. [9] The joint for medical device according to any one of [1] to [8], wherein a gasket base in which a gasket is fitted is formed on the tube side of the connecting plate of the force bra portion.  10. The medical device according to any one of claims 1 to 9, wherein a structure of one end of the hollow tube of the connector portion connected to the tube end portion has a structure based on IS0594-2 standard. Tool fittings.  [11] The medical device connected to the tube end by the medical device joint includes an artificial kidney, a hemofiltration dialyzer, a blood filter, a plasma component separator, a plasma separator, an ascites filter, and an ascites concentrator The joint for medical devices according to any one of claims 1 to 10, wherein force is also selected.  [12] A medical instrument, wherein the joint for medical device according to any one of claims 1 to 11 is configured integrally with the tube end. [13] A medical instrument characterized in that a portion excluding the force bra portion of the joint for medical device according to any one of claims 1 to 11 is configured integrally with the tube end portion.