JP6610867B2 - Medical powder injection device - Google Patents

Description

  The present invention relates to an in-vivo injection device for medical powder used in surgery or the like. In particular, the present invention relates to a device for injecting medical powders such as powdered adhesion preventing materials and hemostatic materials used for organs and blood vessels during endoscopic surgery to a target site.

  In recent years, there are an increasing number of cases of performing an operation under an endoscope because the wound after the operation is small compared with a normal surgical operation and the burden on the patient can be reduced and the hospitalization period can be shortened.

  During surgery, if tissues such as organs and blood vessels damaged by surgical measures are left unattended, there is a risk of adhesion to surrounding tissues. The adhesion between tissues requires detachment at the time of reoperation, which not only creates the possibility of causing unnecessary damage to organs, but also causes stenosis and obstruction of the intestinal tract, fallopian tubes, ovaries, and the like. Since such a situation may cause permanent abdominal pain, intestinal obstruction, and infertility, a film-like film that physically covers the damaged site with the purpose of preventing adhesion between tissues against a conventionally damaged organ. Adhesion prevention materials are used.

  However, it has been difficult to use conventionally used film-like anti-adhesive materials for endoscopic surgery or the like. In other words, after film-like anti-adhesive material is rolled up into a small amount and inserted into the body through a trocar, it is possible to apply the anti-adhesive material in the body so as to cover the damaged part. However, there is a problem that the film-like adhesion preventing material is easily cracked and it is difficult to apply the adhesion preventing material to the correct position covering the damaged part.

  In view of such a problem, for example, as described in Japanese Patent Application Laid-Open No. 2014-140577 (Patent Document 1), while using a pressure gas and vibrating a powdered adhesion prevention material by a vibration mechanism, the body It is conceivable to inject and treat the damaged part.

JP 2014-140577 A

  However, when an operation is performed under the endoscope in the abdominal cavity, a treatment called “pneumo-abdominal” is performed in which a gas such as carbon dioxide gas is fed into the abdominal cavity and the abdominal cavity is inflated to secure a surgical space. . Thereby, the pressure in the abdominal cavity during the operation under the endoscope is kept higher than the outside. Under such circumstances, the injection device according to Patent Document 1 has a pressure gas flow path communicating with the outside from the nozzle through the vibration mechanism, and therefore, when injection is stopped, that is, pressure gas is supplied to the injection device. In the absence, there is a possibility that the gas sent into the abdominal cavity during the pneumoperitia will flow back through the pressure gas flow path due to the pressure difference between the abdominal cavity and the outside.

In that case, if the gas that expands the abdominal cavity and secures the surgical space flows back through the flow path of the pressure gas and leaks out of the abdominal cavity without limit, the surgical space is reduced and the burden on the medical staff is increased. The difficulty level of will increase.

  The present invention has been made in the background as described above, and the problem to be solved is that medical powders such as anti-adhesion materials and hemostatic materials are introduced into the body together with aseptically introduced pressure gas. An object of the present invention is to provide an in-vivo injection device for medical powder having a novel structure capable of preventing the backflow of gas in a body cavity even when no pressure gas is supplied to the injection device.

  Hereinafter, the aspect of this invention made | formed in order to solve such a subject is described. In addition, the component employ | adopted in each aspect as described below is employable by arbitrary combinations as much as possible.

  That is, according to the first aspect of the present invention, an injection nozzle portion that is a tubular body that injects medical powder together with a pressure gas, a grip portion that can be held by a hand, and vibration caused by the supply of the pressure gas. In a medical powder in-vivo injection device provided with a vibration mechanism for generating a medical device and a powder container containing the powder for medical treatment, An injection passage communicating to the base end and a branch passage branched from the injection passage at a branching portion and communicating with the vibration mechanism are provided, and a backflow prevention mechanism is provided on the distal end side from the branching portion. .

  According to the in-vivo injection device for medical powder having the structure according to the first aspect as described above, the backflow prevention mechanism is provided on the distal end side from the branch portion, so that the medical powder is fed into the body by treatment such as pneumoperitoneum. It is possible to prevent the leaked gas from flowing out of the body by flowing backward from the injection nozzle portion through the branch passage to the vibration mechanism. Therefore, an in-vivo injection device for medical powder is realized in which the part inflated with gas is deflated and there is no fear of lack of operating space.

  According to a second aspect of the present invention, in the in-vivo injection device for medical powder described in the first aspect, the backflow prevention mechanism is based on the powder supply passage for supplying the medical powder to the injection passage. It is provided on the end side.

  According to the second aspect, the backflow prevention mechanism is provided on the base end side with respect to the powder supply mechanism for supplying the medical powder to the injection passage. The supplied medical powder does not pass through the backflow prevention mechanism. Therefore, the medical powder can be prevented from being clogged without passing through the backflow prevention mechanism, and the medical powder stored in the powder container is stably supplied into the body together with the pressure gas. An in-vivo injection device for powders is realized.

  According to a third aspect of the present invention, in the in-vivo injection device for medical powder described in the first or second aspect, the gripping portion is a finger hook portion provided so as to protrude from the opposing surface of the main body portion. It is what.

  According to the third aspect, since the gripping portion is a finger-hanging portion provided so as to protrude from the opposing surface of the main body portion, when the gripping portion is gripped by hand, The relative position is determined. When using the medical powder in-vivo injection device, the powder container is present upward in the gravity direction with respect to the trunk so that the medical powder is supplied to the injection passage from the opening of the powder container. Need to be. In other words, medical personnel look at the eyepieces or display the image on the monitor while performing endoscopic surgery while confirming the affected area. I can grasp it. Thereby, the position and direction of the powder container can be appropriately maintained without checking one's hand, and the burden and complexity of treatment can be reduced.

  According to a fourth aspect of the present invention, in the in-vivo injection device for medical powder described in any one of the first to third aspects, the injection nozzle portion is a flexible tube. .

  According to the fourth aspect, since the injection nozzle portion inserted into the body is a flexible tube, any position at which it is easy to inject medical powder onto the damaged site using forceps or the like. It is possible to guide the injection nozzle part. Moreover, according to the 4th aspect, possibility that the injection | spray nozzle part inserted in the body may injure tissues, such as an organ and a blood vessel, can be reduced.

  According to a fifth aspect of the present invention, in the in-vivo injection device for medical powder described in any one of the first to fourth aspects, a rotation mechanism that allows the injection nozzle portion to rotate with respect to the main body portion. It is provided.

  According to the fifth aspect, since the injection nozzle portion is rotatable, the injection nozzle portion is detached from the main body portion at an unintended timing due to the force applied during the operation, and the injection nozzle portion is flexible. In the case of a sex tube, kinking of the tube can be prevented.

  According to a sixth aspect of the present invention, in the in-vivo injection device for medical powder described in any one of the first to fifth aspects, a non-slip mechanism is provided in the injection nozzle portion.

  According to the sixth aspect, since the ejection nozzle portion is provided with the anti-slip mechanism, the medical staff can more easily grasp the ejection nozzle portion when grasping the ejection nozzle portion with a forceps or the like and guiding it to an arbitrary position. it can. In addition, according to the sixth aspect, since the injection nozzle portion can be reliably gripped even with a small force by the slip stopper, the spray nozzle portion is prevented from being crushed by the gripping force even when a flexible tube is used. be able to.

  According to a seventh aspect of the present invention, in the in-vivo injection device for medical powder described in any one of the first to sixth aspects, the branching portion is provided on the proximal end side with respect to the finger hooking portion. It is.

  According to the seventh aspect, the branch portion is provided further on the proximal end side of the finger hook portion provided on the relatively proximal end side of the main body portion. When the pressure gas is supplied to the injection passage, the fluid pressure of the pressure gas becomes smaller due to the pressure loss as it goes to the tip side of the injection passage. According to the seventh aspect, since the pressure gas is supplied from the injection passage to the vibration mechanism via the branch portion before the fluid pressure of the pressure gas decreases, the vibration mechanism operates stably, and the inside of the powder container An in-vivo injection device for medical powder in which the medical powder housed in is stably supplied into the body together with the pressure gas is realized.

  According to the present invention, the backflow prevention mechanism is provided between the proximal end and the distal end of the injection passage in which the backflow prevention mechanism is provided on the tip side from the branch portion. It is possible to prevent the gas sent into the body from flowing backward. Therefore, the medical powder can be stably supplied into the body together with the pressure gas without clogging the injection nozzle part and lack of operation space.

The right view which shows the injection apparatus as the 1st Embodiment of this invention. The front view and back view of the injection apparatus shown in FIG. It is a longitudinal cross-sectional view of the injection apparatus shown in FIG. 1, Comprising: AA sectional drawing of FIG. The top view and bottom view of the injection apparatus shown in FIG. The perspective view of the injection apparatus shown in FIG. BB sectional drawing of the injection device shown in FIG. The right view which shows the injection apparatus as the 2nd Embodiment of this invention. FIG. 8 is a front view and a rear view of the housing member main body shown in FIG. 7. It is a longitudinal cross-sectional view of the injection device shown in FIG. 7, and is an AA cross-sectional view of FIG. FIG. 8 is a top view and a bottom view of the housing member main body shown in FIG. 7. The perspective view of the injection apparatus shown in FIG. BB sectional drawing of the injection apparatus shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, this embodiment is only one embodiment of this invention, and it cannot be overemphasized that an embodiment can be changed in the range which does not change the summary of this invention.

  First, FIGS. 1 to 5 show an in-vivo injection device (hereinafter, also referred to as an injection device) 10 for medical powder as a first embodiment of the present invention. The injection device 10 has a substantially syringe shape as a whole, and operates a piston-like pressing portion 14 by grasping a holding portion 12 that can be held by a hand, so that the medical device can be used for medical purposes. The powder is jetted together with the pressure gas. In the following description, the axial direction refers to the left-right direction in FIG. 1 where the injection device 10 extends, and the distal direction refers to the left direction in FIG. The direction indicates the right direction in FIG. The vertical direction indicates the vertical direction in FIG. Furthermore, the width direction indicates the left-right direction in FIG.

  More specifically, the injection device 10 includes an injection nozzle portion 16 and a main body portion 18. The main body part 18 includes a hollow body part 20 and a pressing part 14 attached to the body part 20, and is more proximal than the injection nozzle part 16. Further, the injection device 10 is provided with an injection passage 28 and a branch passage 70 for the passage of pressurized gas and medical powder. Here, the body part 20 has a generally syringe shape with a circular opening 48 provided at the tip as a whole, and finger hook parts 22a and 22b projecting from opposing surfaces are provided on the base end side of the body part 20. Is formed. Here, the “facing surface” refers to a portion facing a portion of the outer peripheral surface of the body portion 20 with the central axis of the body portion 20 interposed therebetween. The shape of the finger hanging portion 22 is an arched shape so that the fingers can be easily hung. In the present embodiment, the finger hooks 22a and 22b are provided so as to protrude in the vertical direction from the trunk. In this case, in the present embodiment, the position of the powder container 62 is determined in the direction of the finger hook portion 22a.

  Further, the distal end portion of the piston-like pressing portion 14 is inserted into the proximal end side opening of the trunk portion 20. The pressing portion 14 is slidable in the axial direction on the proximal end side of the main body portion 18, and the outer diameter dimension of the distal end portion is made larger than the inner diameter dimension of the proximal end portion of the body portion 20. Thus, the pressing portion 14 is prevented from coming out from the trunk portion 20 to the proximal end side. The proximal end portion of the pressing portion 14 protrudes to the outer peripheral side in the vertical direction and serves as the operation portion 24. The grip portion 12 according to the present invention refers to a region that fits in the palm of the hand for gripping, including the pressing portion 14, the operation portion 24, and the finger hook portion 22.

  In the present embodiment, since the finger hook portion 22 protruding from the opposing surface is provided, the relative position of the powder container relative to the direction of the back of the hand is determined when the grip portion 12 is gripped. For example, in FIG. 7, when the injection device 10 is gripped by placing the index finger and middle finger of the right hand from above the finger hooks 22c and 22d, the back of the hand and the powder container are necessarily present upward in the gravitational direction with respect to the trunk. Will do. The direction of the back of your hand can be understood without looking at the hand, so medical personnel can look at their own hands, such as during an endoscopic operation while looking at the affected area by looking through the eyepiece or on the monitor. Even in situations where it is impossible to gaze, if the direction of the back of the hand can be understood, the position and direction of the powder container can be surely understood. Note that the finger hooking portion 22 and the pressing portion 14 may be slid in the axial direction after attaching an operation assisting tool such as an adapter.

  Further, an opening / closing valve 34 is provided on the distal end side of the internal passage 29 provided in the pressing portion 14, and a tubular member 40 is provided on the further distal end side of the opening / closing valve 34. Here, the cylindrical member 40 is set so as to sandwich the opening / closing valve 34 together with the pressing portion 14, and when the medical powder is injected, the opening / closing valve 34 is caused by an external operating force in the axial direction applied to the pressing portion 14. Slide toward the tip end in the axial direction. As the on-off valve 34, various known structures that can shut off the internal passage 29 in a sealed state can be applied, but in this embodiment, a sealing valve is employed.

  Further, a fixed nozzle 36 having a branching portion 54 is provided on the front end side of the opening / closing valve 34 so as to be separated from the opening / closing valve 34. When the open / close valve 34 slides to the distal end side, the base end of the fixed nozzle 36 is inserted while pushing the open / close valve 34 open, and the fixed nozzle 36 and the internal passage 29 are communicated with each other. Here, a connection port 30 communicating with the internal passage 29 and extending downward is provided, and a flexible tube communicating with a pressure gas supply source is connected to the connection port 30. The connection port 30 or a flexible tube is provided with a filter that allows passage of pressurized gas and prevents passage of germs in the pressure gas. Aseptic pressure gas is supplied. Further, the base end side of the fixed nozzle 36 is set so as to enter the inside of the cylindrical member 40. Further, a spring 42 is provided on the outer peripheral side of the cylindrical member 40 and the fixed nozzle 36 so that the pressing portion 14 and the operation means 32 are always urged toward the axial base end side.

  Thereby, when injecting the medical powder, if an external operating force for moving the pressing portion 14 toward the distal end in the axial direction is applied, the fixed nozzle 36 is inserted into the opening / closing valve 34 and communicated with the internal passage 29. Pressure gas is supplied to the injection passage 28. When stopping the injection of the medical powder, if the axial external operation force applied to the pressing portion 14 is released, the fixed nozzle 36 is automatically moved from the opening / closing valve 34 by the biasing force of the spring 42. Withdrawn, the communication with the internal passage 29 is released, and the supply of the pressure gas to the injection passage 28 is stopped. Here, the opening / closing valve 38 is set to be closed at the same time that the fixed nozzle 36 is pulled out, and to shut off the internal passage 29 in a sealed state. Finally, the pressing portion 14 moves to a position before the medical powder is ejected by the urging force of the spring 42.

  On the other hand, on the front end side of the body portion 20, there are provided a support member 52 rotatably attached to the circular opening 48, and an injection nozzle portion 16 extending from the support member 52 to the front end side. The injection nozzle portion 16 is configured by a tubular body 26 having a single tube structure, a non-slip mechanism 72, and a diffusion member 74. Here, since the tubular body 26 is a flexible tube, even in a situation where the surgical field is limited such as an operation under an endoscope, the ejection nozzle unit 16 is used with forceps or the like. It is easy to guide to an arbitrary position. An injection passage 28 that communicates from the proximal end of the pressing portion 14 to the distal end of the injection nozzle portion 16 is provided inside the injection device 10.

  In this embodiment, as shown in FIG. 6, the anti-slip mechanism 72 is provided as an outer peripheral surface having a polygonal cross section in a part of the tubular body 26. The aspect of the anti-slip mechanism 72 is not particularly limited, and may be, for example, a groove or unevenness provided on the outer peripheral surface of the tubular body 26, or an arbitrary part may be formed of a material having a high friction coefficient. Further, the position at which the anti-skid mechanism 72 is provided is not limited, and may be provided at the distal end portion of the tubular body 26, or may be provided at the intermediate portion or the proximal end portion. It may be provided over the entire outer peripheral surface.

  Further, the diffusion member 74 is assembled in the accommodated state at the distal end opening of the tubular body 26. The shape of the diffusing member 74 is not particularly limited, and examples thereof include a plate shape or a spiral shape combined with a cross, and an orifice for reducing the inner diameter of the tubular body 26. The ejected fluid is guided and rectified along the surface of the diffusing member 74 and ejected to the outside, so that the medical powder to be ejected is diffused and ejected substantially uniformly over a wider range. Yes.

  Further, a backflow prevention mechanism 46 is provided in the body portion 20 at the front end side of the fixed nozzle 36, and is set so that the communication state can be switched by supplying pressure gas. When the injection of the medical powder is stopped, that is, when the pressurized gas is not supplied to the injection passage 28, the injection passage 28 is substantially blocked by the backflow prevention mechanism 46. On the other hand, when the medical powder is injected, that is, when the pressure gas is supplied to the injection passage 28, the blocking of the pressure gas by the backflow prevention mechanism 46 is released, and the injection passage 28 is communicated from the proximal end to the distal end. It becomes a state. The specific mechanism of the backflow prevention mechanism 46 is appropriately set depending on the type and nature of the medical powder and is not particularly limited. For example, a check valve, more specifically, a diaphragm valve, a duckbill valve, a flapper valve, etc. Applicable.

  Further, a holding member 43 is provided in the body portion 20 on the distal end side of the backflow prevention mechanism 46. A relay passage 44 extending in the axial direction is formed in the holding member 43, and the distal end of the relay passage 44 is connected to the proximal end of the support member 52, while the proximal end of the relay passage 44 is a backflow prevention mechanism 46. Connected to the tip of the. Thereby, the injection passage which can communicate from the connection port 30 of the pressing portion 14 to the tip of the injection nozzle portion 16 via the internal passage 29, the opening / closing valve 34, the fixed nozzle 36, the backflow prevention mechanism 46, the relay passage 44, and the support member 52. 28 is configured. Each member which comprises an injection channel may be connected by members, such as a tube, and may be connected by well-known means, such as a fitting and welding. Furthermore, the members may be integrally formed as necessary.

  On the other hand, a substantially cylindrical fixing member 50 is fitted and fixed to the proximal end side of the tubular body 26, and the proximal end side of the fixing member 50 is fitted to a substantially cylindrical support member 52. Here, since the fixing member 50 and the support member 52 are set so as to be detachable, the medical powder gels with moisture in the body and clogs inside the tubular body 26, and the medical powder is Even in a situation where the injection cannot be performed, it can be easily solved by replacing the fixing member 50 and the tubular body 26. Further, the distal end side of the relay passage 44 is fitted into the proximal end side of the support member 52. In the operation under the endoscope, the engagement between the fixing member 50 and the support member 52 is released, and the fixing member 50 and the tubular body 26 are prevented from being accidentally dropped into the trocar. The outer diameter of 50 is set to be larger than the inner diameter of the trocar.

Further, the opening 48 and the support member 52 provided in the main body constitute a rotation mechanism 56. The inner diameter dimension on the base end side of the support member 52 is slightly larger than the outer diameter dimension on the distal end side of the intermediate passage 44. The outer diameter of the support member 52 is formed to be larger than the diameter of the opening 48 on the distal end side and the proximal end side, and is formed to be slightly smaller than the diameter of the opening 48 on the intermediate portion. In addition, a flange portion is provided on the outer peripheral surface of the intermediate portion so that the support member 52 does not move in the axial direction with respect to the opening 48. Thereby, since the injection nozzle part 16 becomes rotatable with respect to the main-body part 18, even if the tubular body 26 is a flexible tube like this embodiment, the tubular body 26 does not kink, but medical Powder can be stably sprayed.

  On the other hand, the powder supply mechanism 32 includes the holding member 43, the container holder 60, the powder container 62, and the powder supply passage 64. The holding member 43 is provided with a container holder 60 exposed upward from the body portion 20, and a powder container 62 containing medical powder is detachably attached to the container holder 60. . The powder container 62 has various shapes and sizes depending on the type of medical powder to be used, and the shape and size of the container holder 60 is also the same as the powder container 62 to be used. It is set accordingly. In particular, in the present invention, the medical powder to be used is not limited, and can be applied to medical powders such as anti-adhesion materials, hemostatic materials and various drugs, and is adopted accordingly. The powder container 62 and the container holder 60 can be set appropriately.

  Further, the holding member 43 is provided with a powder supply passage 64 extending from the container holder 60 toward the relay passage 44. The powder supply passage 64 communicates from the container holder 60 to the intermediate passage 44, and the powder container 62 is attached to the container holder 60 with its opening facing downward so that the relay passage is passed through the powder supply passage 64. The medical powder is supplied to 44. Here, the inner diameter of the powder supply passage 64 is appropriately determined in order to supply an appropriate amount of medical powder to the relay passage 44.

  The branch passage 70 is formed so as to branch from the injection passage 28 at the branch portion 54 provided on the distal end side of the fixed nozzle 36 and communicate with the vibration mechanism 66. Therefore, the pressure gas is supplied to the vibration device 66 via the branch passage 70 at the same time as the pressure gas is supplied to the injection passage 28. Specifically, in the present embodiment, a flexible tube is connected to the tip of the branch portion 54 and connected so as to communicate with the vibration mechanism 66.

  Furthermore, the holding member 43 is equipped with a vibration mechanism 66. The vibration mechanism 66 is provided inside the trunk portion 20, and for example, a publicly known one described in JP 2012-143502 A can be employed. That is, the eccentric rotating body 68 is assembled to the lower portion of the holding member 43 so as to be rotatable around the central axis, and the eccentric rotation is caused by the fluid pressure exerted through the branch passage 70 branched from the front end side of the fixed nozzle 36. The body 68 is driven to rotate. Here, the eccentric rotator 68 has its center of gravity set eccentric from the rotation center axis, and fluid pressure is applied to the saw-tooth-shaped pressure receiving surface provided on the outer peripheral surface to rotate around the rotation center axis. Thus, the powder container 62 mounted on the holding member 43 is vibrated at a frequency corresponding to the rotation period. The powder container 62 is vibrated to prevent clogging of the medical powder inside the powder container 62 and the powder supply passage 64 and the like, and the medical powder relay passage 44 as described above. Supply to is realized more stably.

  As described above, the vibration mechanism 66 is operated by the fluid pressure of the pressurized gas. At this time, if the pressure gas cannot be discharged to the outside, the air pressure in the vibration mechanism 66 increases each time the medical powder is injected, and eventually becomes equal to the fluid pressure of the pressure gas. If it becomes so, pressure gas will not be supplied to the vibration mechanism 66, and the vibration mechanism 66 will become inoperable. Therefore, the pressure gas supplied to the vibration mechanism 66 through the branch passage 70 needs to be discharged to the outside. In order to release the pressure gas to the outside of the injection device 10, the body portion 20 is in gaseous communication with the outside. That is, the pressure gas supplied to the vibration mechanism 66 through the branch passage 70 is released from the trunk portion 20 to the outside after the vibration mechanism 66 is operated.

  In the ejection device 10 of the present embodiment, the gripping portion 12 is moved so that the palm, more specifically, the base portion of the palm side thumb and the operation portion 24 of the pressing portion 14 are overlapped with each other while hooking the finger hanging portion 22 with fingers. It is designed to grip. Then, the medical powder contained in the powder container 62 can be ejected from the distal end opening portion of the tubular body 26 by pushing the pressing portion 14 toward the distal end side with the palm and switching the ejection passage 28 to the communicating state. it can. That is, when the pressing portion 14 is pushed toward the distal end side, the open / close valve 34 held in the closed state is opened, and the entire length of the injection passage 28 is brought into communication, and pressure gas is supplied through the injection passage 28. . On the other hand, as the pressure gas is supplied to the vibration mechanism 66 through the branch passage 70 branched from the fixed nozzle 36, the eccentric rotating body 68 rotates and vibration continuously occurs, and the powder container 60. The medical powder in the inside is sent out little by little into the injection passage 28 and is injected to the outside together with the pressure gas flowing through the injection passage 28 from the tip opening portion of the injection nozzle portion 16.

  On the other hand, when the pressing force of the pressing portion 14 is released, the pressing portion 14 returns to the initial position by the biasing force of the spring 42, so that the opening / closing valve 34 held in the open state is closed and the injection passage 28 is shut off. Is done. Thereby, since supply of the pressure gas into the injection passage 28 is stopped, the injection of the medical powder to the outside is also stopped.

  In short, the communication path and the blocking state of the injection passage 28 are switched by the operation means 32. In other words, supply and stop of the pressure gas in the injection device 10 are switched by the operation means 32. Here, when the injection passage 28 is in the communication state, the medical powder is injected, while when the injection passage 28 is in the cut-off state, the injection of the medical powder is stopped. Also, the injection and stop of injection of the medical powder are switched.

  Further, in the present embodiment, erroneous injection preventing means 76 that is fitted to the outer peripheral surface of the intermediate portion in the axial direction of the pressing portion 14 is provided. The erroneous injection preventing means 76 is constituted by a fitting portion formed in a substantially semicircular shape and a plate-shaped handle, and the inner peripheral surface of the fitting portion corresponds to the outer peripheral surface of the intermediate portion in the axial direction of the pressing portion 14. Has been. By attaching the erroneous injection preventing means 76 to the pressing portion 14 when the injection is stopped, it is possible to prevent the medical powder from being injected at an unintended timing.

  Furthermore, in this embodiment, the powder container 62 containing the medical powder is detachably attached to the container holder 60, and the pressure gas and the medical powder are ejected through different flow paths. 28. Thereby, even during surgery, by changing the powder container, different types of medical powder can be injected, and it is not necessary to prepare a plurality of types of injection devices.

  Furthermore, in this embodiment, since the fixing member 50 is fitted and fixed to the support member 52 with respect to the main body portion 18 and can be removed, the tubular body 26 can be easily replaced. Thus, for example, it is possible to easily solve the problem that the medical powder gels with moisture in the abdominal cavity and becomes clogged inside the tubular body 26 and the medical powder cannot be ejected.

  As mentioned above, although embodiment of this invention has been explained in full detail, this invention is not limitedly interpreted by the specific description in this embodiment.

  For example, in the said embodiment, although the injection nozzle part 16 was made into the single tube | pipe structure of the tubular body 26, it is not limited to this aspect. For example, the tubular body may be a multiple tube including a double tube. Moreover, although the tubular body 26 was made into the flexible tube in the said embodiment, it is not limited to this aspect. For example, a tube formed of a hard resin may be used.

  Moreover, in the said embodiment, although the finger-hanging part 22 was made into the arch shape which protruded from the trunk | drum 20, it is not limited to this aspect. The finger-hanging portion may be appropriately set in a shape that allows easy fingering, for example, a flange shape or a rod-like shape. Further, the position at which the finger hooking portion 22 is provided is not particularly limited, but is preferably provided so as to protrude in the vertical direction or the width direction from the outer peripheral surface of the trunk portion 20.

  Moreover, in the said embodiment, although the fixing member 50 was fixed by fitting with respect to the support member 52, it is not limited to this aspect. That is, the tubular body and the fixing member may be fixed by press fitting or luer lock. In addition, by making the tubular body detachable, it is possible to easily cope with problems such as clogging of medical powder in the tubular body, but even if the tubular body is made detachable Good. In that case, it is preferable to provide a mechanism for removing clogging of the medical powder.

  In the above embodiment, the backflow prevention mechanism 46 is provided on the proximal end side with respect to the powder supply passage 64 and on the distal end side with respect to the branch portion 54, but is not limited to this mode. The backflow prevention mechanism may be provided on the distal end side of the branch portion, and may be provided on the distal end side of the powder supply mechanism, for example, between the powder supply mechanism and the support member or in the injection nozzle portion. By setting it as such an aspect, it can prevent that the gas sent in the body flows backward in an injection channel, and leaks through the branch channel infinitely to the outside of a backflow prevention mechanism or an injection device.

  Further, it is desirable that the backflow prevention mechanism 46 is provided on the base end side with respect to the powder supply passage 64. According to this aspect, in addition to the backflow of the gas introduced into the body described above, the medical powder supplied from the powder supply mechanism to the injection passage flows back through the injection passage to the pressure gas supply source and the vibration mechanism. Intrusion can be prevented.

  Moreover, in the said embodiment, although the branch part 54 is provided in the front end side of the fixed nozzle 36, it is not limited to this aspect. The branch part should just be provided in the base end side rather than the backflow prevention mechanism among injection paths. Moreover, the branch part should just be provided in the front end side rather than the opening-and-closing valve and the base end side rather than the injection nozzle part among injection paths. Therefore, not only a fixed nozzle but a branch part can be provided in each member which constitutes an injection passage, a tube which connects each member, etc. By setting it as this aspect, it can prevent that the gas introduce | transduced into the body flows backward in an injection channel and leaks to the exterior of a backflow prevention mechanism and an injection device infinitely through a branch channel.

  Further, the branching portion 54 may be provided on the proximal end side with respect to the finger hanging portion 22. According to this aspect, since the branch portion is set relatively to the proximal end side of the injection passage, the pressure gas is supplied from the injection passage to the vibration mechanism through the branch portion before the fluid pressure of the pressure gas decreases. The Therefore, the vibration mechanism can be stably operated.

  Moreover, in the said embodiment, the flexible tube was connected to the front-end | tip of the branch part 54, and it connected so that it might connect with the vibration mechanism 66, However, It is not limited to this aspect. For example, a conduit that integrally extends from the branch portion 54 to the distal end side may communicate with the vibration mechanism.

  In the present invention, the erroneous injection preventing means 76 is not essential. Even when the erroneous injection preventing means is employed, there is no need to use the erroneous injection preventing means fitted to the outer peripheral surface of the pressing portion 14, and the body portion and the pressing portion are fixed to each other so as not to move as necessary. May be provided. Further, in the above-described embodiment, the medical powder internal injection device 10 is a separate member. However, the medical powder may be integrally provided on the body or the pressing portion.

  Furthermore, in the present invention, the pressure gas is supplied from the outside. However, for example, a pressure gas cylinder, a pump, or the like may be built in the injection device.

10: Medical powder in-vivo injection device, 12: gripping part, 16: injection nozzle part, 18: main body part, 24: operation part, 28: injection passage, 46: backflow prevention mechanism, 60: container holder, 62: Powder container 66: Vibration mechanism

Claims (6)

An injection nozzle that is a tubular body for injecting medical powder together with pressure gas;
A medical device provided with a gripper that can be held by hand, a vibration mechanism that generates vibration when the pressurized gas is supplied, and a main body that includes a powder container that stores the medical powder. In-body powder injection device
An injection passage capable of communicating from the tip of the injection nozzle part to the base end of the main body part;
A branch passage branching from the injection passage at a branch portion and capable of communicating with the vibration mechanism;
A backflow prevention mechanism is provided in the jet passage on the tip side of the branch portion to block the gas flowing back from the jet nozzle portion .
An in-vivo injection device for medical powder, wherein the backflow prevention mechanism is provided at a base end side with respect to a powder supply passage for supplying the medical powder to the injection passage . The medical powder in-vivo injection device according to claim 1 , wherein the gripping portion is a finger-hanging portion provided so as to protrude from an opposing surface of the main body portion. The medical powder internal injection device according to claim 1 or 2 , wherein the tubular body is a flexible tube. The medical powder in-body injection device according to any one of claims 1 to 3 , further comprising a rotation mechanism that enables the injection nozzle portion to rotate with respect to the main body portion. The in-vivo injection device for medical powder according to any one of claims 1 to 4 , wherein an anti-slip mechanism is provided in the injection nozzle portion. The medical powder in-vivo injection device according to claim 2 , wherein the branch portion is provided on a proximal end side with respect to the finger-hanging portion.

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