JP5731131B2 - Medical infusion tube connection device - Google Patents

Description

  The present invention relates to a connection device for a medical infusion set or an infusion tube for extension, and relates to a connection device for an infusion tube that can be used as a lock-type and slip-type connection device or a slip-type connection device.

  A plurality of techniques are known as an infusion tube having a lock-type connector in this type of medical instrument. For example, as a first known example, a connector core portion fixed to the tip of a tube and an outer cylinder portion rotatable around the outer periphery of the core portion, the connector core portion has a central portion passing therethrough, The tip has a tubular shape with a tapered outer diameter, followed by a rib-like portion, a rear portion having a plurality of protrusions, and the outer tube portion has a rib-like portion on the inner surface. The rib-shaped portion has a groove corresponding to a plurality of protrusions at the rear portion of the core portion, and the inner diameter of the rib-shaped portion is smaller than the outer diameter of the rib-shaped portion of the connector core portion, and all of the rib-shaped portions are inside the inner surface. It is a luer lock connector characterized by comprising a screw (see Patent Document 1).

  This luer lock connector can rotate the outer cylinder of the male connector and can be connected easily and securely without twisting the catheter or tube, improving workability and ensuring a secure fit, making it extremely useful clinically It is that.

  For example, as a second known example, a male luer part having a lock nut first desorption prevention part on the base end side and a second desorption prevention part of the lock nut on the outer peripheral surface on the base end side, In the lock-type connector fitted to the male luer part, the lock-type connector is characterized in that the lock nut part can be detached from the first desorption preventing part of the male luer part ( Patent Document 2).

  This lock-type connector can be used in two ways: a lock-type connection by screwing and a slip-type connection only by fitting with one connection member. Further, when the lock-type connection is released, the slip-type connection can be easily released at the same time.

  Further, as a third known example, in a lock-type connection device in which a lock ring is fitted to a male connector having a male luer on the distal end side, a lumen of the lock ring is formed in a stepped cylinder shape, A first female screw that can be screwed with an end of a mating female connector connected to the male luer is provided in the large-diameter lumen portion on the distal end side, and the small-diameter lumen portion on the proximal end side includes the first female screw. Provided with a second female screw that can be engaged with a locking portion formed on the outer periphery of the male connector on the base end side, and can be brought into contact with the end surface of the lumen step of the lock ring in front of the outer periphery on the base end side of the male connector This is a lock-type connecting device provided with a simple protruding stopper (see Patent Document 3).

  This lock-type connector can be easily and safely attached and detached when the user intends, and conversely, the lock nut can be easily removed when not intended, improving usability did. In addition, since the direction of the first and second female threads of the lock ring is set to be opposite to each other, two functions of attachment / detachment and fastening with different purposes can be established at the same time, further improving usability. I was able to make it.

Japanese Utility Model Publication No. 59-87840 JP-A-7-148271 JP 2004-81433 A

  By the way, in the known examples 1 and 2, although there is a difference in expression, a plurality of protrusions are provided substantially on the outer periphery of the base end of the male luer connector, and the lock nut fitted to the male luer connector is connected to the lock nut. Providing a plurality of grooves corresponding to the protrusions, shifting the position of the protrusions and grooves prevents the lock nut from being detached from the male luer connector, and aligning the positions of the protrusions and grooves allows the slide movement in the axial direction. The lock nut is provided with both a lock-type function and a slip-type function in relation to the male luer connector.

  However, in actual use, in the case of the operation of picking the male luer connector, inserting it into the female connector, and fitting it, the lock nut is positioned so as to cover the male luer connector in a loose fit when used in the lock type. The problem is that not only is it difficult to operate due to interference, but it is difficult to fix even if you try to fix it to the patient with tape, etc., and it will come out of the locked state even if the user does not intend it Have On the other hand, when used as a slip type, the lock nut does not cover the male luer connector, so the male luer connector can be picked and easily inserted and fitted into the female connector, so operability is good, On the other hand, when screwing the lock nut to the outer peripheral surface of the female connector, the lock nut must be slid to the position that is far from the male connector and covers the male luer connector, Even if it is brought to that position, the protrusion and groove must be aligned, moved further, and screwed together, and the alignment may not be smooth and workability is also poor. Have.

  In addition, when the lock nut is used as a slip type, the lock nut moves freely on the flexible tube. For example, when used as an infusion, the lock nut often moves to the patient side. In contact with the patient's skin, causing irritation, especially when the patient is used on newborns (such as premature babies) and infants. There is also a problem of causing inconveniences in various medical practices such as risk of incurring.

  Furthermore, also in the known example 3, in short, the lock nut (lock ring) has both a lock type and a slip type function in relation to the male luer connector as in the known examples 1 and 2, and the user In order to prevent it from coming out of the locked state unless it is intentionally operated, a reverse screw is formed on the base end side of the male luer connector, and the small diameter bore on the base end side of the lock nut is also screwed into the female connector. Screws are formed by screwing them in the opposite direction, and the structure is complex and safety is ensured because it cannot be removed unless the user intends to use it. If the lock nut is not rotated in the same direction as screwed into the connector, it will not be possible to remove the lock nut from the male luer connector and make it slip-type. There is a problem that it is difficult to operate (not easy to use), and when used as a slip type, the lock nut (lock ring) moves freely on the flexible tube as described above. There is a problem in that it causes inconveniences in various medical practices such as risk of causing damage to the skin of the patient.

  By the way, in the connection of the infusion tube in the known technique, the lock nut (lock ring) has both functions of a lock type and a slip type in relation to the male luer connector. In any case, the operability is poor, and preferably the slip type is superior in terms of handling and operability.

  Therefore, in the infusion tube connecting device in the above-mentioned known technique, the structure is simplified to facilitate handling and operability, and inconvenience in medical practice such as risk of causing damage to the patient's skin in relation to the patient. There is a solution problem to be solved completely.

As a specific means for solving the above-mentioned problems, a female connector is attached to an end of one infusion tube of at least two infusion tubes to be connected, and a male connector is attached to the other infusion tube, A connection device comprising a lock nut movably arranged in a loosely fitted state on an infusion tube to which a male connector is attached, and restricting the movement range of the lock nut to an arbitrary range in the other infusion tube A stopper ring is slidably disposed, and the male connector has a male luer with a tapered surface whose diameter is reduced at the tip, and a ring shape on the outer peripheral surface of the male connector at the base end side of the male luer. The lock nut is formed in a cylindrical shape and is provided with a plurality of rib-shaped protrusions on the outer circumferential surface in the longitudinal direction. There is provided a connecting device for medical infusion tube, wherein the rear end providing the stopper portion abutting the stepped portion of the male connector provided with a female screw.

  In the medical infusion tube connecting device according to the present invention, the stopper ring is disposed in a positional relationship such that the lock nut is sandwiched between the male connector; and the stopper ring has an inner peripheral surface. A plurality of protrusions that are in frictional engagement with the infusion tube are provided as additional requirements.

According to the medical infusion tube connecting device according to the present invention, the male connector includes a male luer having a tapered surface whose diameter is reduced at the distal end portion, and an outer peripheral surface of an intermediate portion of the male connector on the proximal end side of the male luer. A ring-shaped stopper portion is integrally formed, and the lock nut is formed in a cylindrical shape, provided with a plurality of rib-shaped protrusions on the outer circumferential surface in the length direction, and provided with a female screw on the tip side of the inner circumferential surface. by providing the stepped portion abuts with the stopper portion of the male connector to the rear side along with, since each component can be formed into a simple structure, yet simple construction, the two infusion tube securely The lock nut for connection is a slip type, but by providing rib-shaped protrusions for slip prevention on the outer circumferential surface in the length direction, even when tightening at the time of connection, When loosening However, it is easy to operate by reliably picking it with the fingertip, and by providing a stopper ring that regulates the movement range of the lock nut, the stopper ring is positioned at a distance from the patient, that is, the male connector. If placed in the vicinity, handling and operation of the lock nut is easy, and all inconveniences in medical practice such as the risk that the lock nut will inadvertently move and contact the patient's skin will cause damage. There is an excellent effect that can be made.

It is the perspective view which showed schematically the principal part of the connection apparatus of the medical infusion tube which concerns on preferable embodiment which concerns on this invention. It is sectional drawing which expanded and showed the principal part of the connection apparatus which concerns on the same embodiment. FIG. 2 is an enlarged view of a stopper ring used in the connection device according to the embodiment, in which FIG. (A) is a side view, FIG. (B) is a rear view seen from the rear end side, and FIG. FIG.

  The present invention will be described based on the illustrated embodiment. In FIG. 1, the medical infusion tube connecting apparatus according to a preferred embodiment is provided with a female connector 2 at the end of one flexible infusion tube 1 to be connected, and at the end of the other infusion tube 3. A movable lock nut 5 provided with a male connector 4 and arranged loosely with respect to the infusion tube 3, and between the male connector 4 so that the movement range of the lock nut 5 can be arbitrarily set. And a stopper ring 6 that is slidable and disposed in such a positional relationship that the lock nut 5 is sandwiched therebetween.

  The female connector 2 has a plurality of wings 2a formed on the outer peripheral surface thereof so as to be easily picked by the operator. Further, the inner peripheral surface of the female connector 2 is provided with a female luer 2b having a tapered surface that slightly expands in diameter on the free end side and receives the male connector 4 as in the prior art, and an outer peripheral surface on the free end side. Is formed with a male screw 2c, and a conventional one can be used as it is.

  As shown in FIG. 2, the male connector 4 is formed on a male luer 4 a having a tapered surface with a slightly reduced diameter, and the base end side of the male luer 4 a, that is, approximately in the middle of the male connector 4. Is formed thick over the required length, and a stopper portion 4b of the lock nut 5 formed of a ring-shaped bulging portion is formed on the outer peripheral surface thereof.

As shown in FIG. 2, the lock nut 5 is formed in a substantially cylindrical shape having a required length that can be externally fitted to and removed from the male connector 4. The rib-shaped protrusion 5a is formed along the length direction, and a female screw 5b that is screwed with the male screw 2c of the female connector 2 is provided on the front end side of the inner peripheral surface. Is provided with a stepped portion 5c that is rotatably contacted with the stopper portion 4b of the male connector 4.

  As shown in FIG. 3A, the stopper ring 6 is a short cylindrical body as a whole, and is provided with a ring-shaped protrusion 6a serving as a finger hook at a substantially central portion of the outer peripheral surface thereof, and the lock nut 5 The tip portion located on the side is formed in the small diameter portion 6b through a step. Further, as shown in FIG. 3C, the inner peripheral surface of the stopper ring 6 is divided into a front end portion side and a rear end portion side at a substantially central portion, and the front end portion side is slightly enlarged to increase the diameter. A plurality of projections 6d that frictionally engage with the infusion tube 3 are provided along the length direction on the inner peripheral surface on the rear end side that forms the portion 6c.

  As shown in FIG. 3B, the tops of the plurality of protrusions 6d in the stopper ring 6 are formed in an arc shape, and the circular a connecting the tops of these protrusions 6d is the infusion tube 3 to be inserted. It is formed slightly smaller than the outer diameter. This slightly smaller diameter is preferably in a range of about 0.05 to 0.1 mm from the outer diameter of the infusion tube 3, and the top of the projection 6 d and the outer peripheral surface of the infusion tube 3 are substantially formed. Since the contact is linear and there is a certain amount of frictional resistance, it does not move freely unless the stopper ring 6 is picked and slid. The small diameter portion 6b on the distal end side can be inserted and fitted to the rear end portion side of the lock nut 5, and the rear end portion side of the male connector 4 can be fitted to the enlarged diameter portion 6d. Yes.

  The medical infusion tube connecting apparatus configured as described above connects the male connector 4 attached to the other infusion tube 3 to be connected to the female connector 2 attached to one infusion tube 1. At this time, the female connector 2 is picked with one hand, the male connector 4 is picked with the other hand, the male luer 4a is inserted into the female luer 2b, and then the other hand is placed loosely in the infusion tube 3. The infusion tubes 1 and 3 are in a stable state by picking up the lock nut 5 and moving it forward so as to cover the male connector 4 and screwing the female screw 5b of the male connector 4 to the male screw 2c of the female connector 2. Connected with.

  At this time, the lock nut 5 provided in the other infusion tube 3 to be connected is not placed outside the male connector 4 (covered) but supported by the stopper ring 6 in the vicinity of the male connector 4. Since the male connector 4 can be easily picked and inserted into the female connector 2, the lock nut 5 in the standby state is also picked up in the vicinity and can be easily put on the male connector 4. Twisting (turning) a plurality of times is sufficient, and operations such as alignment are not required, so the operations are simple and can be smoothly connected and fixed. It should be noted that the vicinity means a range that does not get in the way when the male connector 4 is picked, and may be within 5 cm at most.

  Further, the stopper ring 6 after the lock nut 5 is used for connection / fixing may be left as it is, and if it interferes with medical treatment, the stopper ring 6 may be shifted to the lock nut 5 side. Also, when the lock nut 5 is loosened and removed, if the loosened lock nut 5 is moved away from the male connector 4, the stopper ring 6 is also pushed without any extra operation. They move together.

  In any case, by using a slip-type connection device, the configuration of each part can be simplified, and the handling and operation of each part can also be easily performed. The movement of the lock nut 5 in the state can be restricted to an arbitrary position range, and thereby the operability is remarkably improved, and in particular, medical practices such as the risk of causing damage to the skin of an infant patient due to the lock nut. The above accident or inconvenience can be completely eliminated.

  The connection device for medical infusion tubes according to the present invention improves the operability of the lock nut by providing a stopper ring that restricts the movement of the lock nut not only in the slip type but also in the lock type connection device according to the prior art. At the same time, various accidents or inconveniences in medical practice can be solved, and it can be widely used for connecting this kind of infusion tube.

1, 3 Infusion tube
2 female connector 2a wing 2b female luer 2c male screw 4 male connector 4a male luer
4b Stopper portion 5 Lock nut 5a Rib-shaped protrusion 5b Female screw 5c Stepped portion 6 Stopper ring 6a Ring-shaped protrusion 6b Small diameter portion 6c Wide diameter portion 6d Projection portion a Circular shape

Claims (3)

A female connector is attached to the end of one infusion tube of at least two infusion tubes to be connected, a male connector is attached to the other infusion tube, and is loosely fitted to the infusion tube to which the male connector is attached. A connecting device comprising a lock nut movably disposed;
In the other infusion tube, a stopper ring for restricting the moving range of the lock nut to an arbitrary range is disposed so as to be slidable,
The male connector is formed by integrally forming a male luer having a tapered surface with a reduced diameter at the tip, and a ring-shaped stopper on the outer peripheral surface of the middle part of the male connector on the base end side of the male luer,
The lock nut is formed in a cylindrical shape, provided with a plurality of rib-like protrusions on the outer circumferential surface in the length direction, provided with a female screw on the front end side of the inner peripheral surface, and a stopper portion of the male connector on the rear end side. A medical infusion tube connecting device, characterized in that a stepped portion is provided . The medical infusion tube connecting device according to claim 1, wherein the stopper ring is disposed in a positional relationship such that the lock nut is sandwiched between the stopper ring and the male connector. 3. The medical infusion tube connecting device according to claim 1, wherein the stopper ring is provided with a plurality of protrusions in contact with the infusion tube in a frictional engagement state on an inner peripheral surface.

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