JP2017051562A - Medical powder intracorporeal injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical powder intracorporeal injection device with a novel structure which, when a medical powder such as an antiadhesive material is injected into a body along with an aseptically introduced pressure gas, can achieve a predefined injection state regardless of the injection direction even during endoscopic surgery, etc.SOLUTION: Provided is a medical powder intracorporeal injection device 10 for injecting a medical powder along with a pressure gas, the injection device being provided with a rotatable powder storage component 30 for storing the medical powder such that the medical powder is supplied from the powder storage component 30 to an injection passage 60 of the pressure gas by a centrifugal force due to the rotation of the powder storage component 30 so as to be injected along with the pressure gas.SELECTED DRAWING: Figure 4

Description

  TECHNICAL FIELD The present invention relates to a medical powder injection device used for surgery and the like, and in particular, a medical powder suitably used for treatment by injecting a powder for prevention of adhesion or hemostasis to a tissue. The present invention relates to a body injection device.

  If a tissue such as an organ damaged by a surgical procedure such as surgery or tissue sampling is left unattended, the damaged portion may adhere to surrounding tissues. Such tissue adhesion causes infertility due to tubal adhesion or intestinal obstruction due to intestinal adhesion, which is a heavy burden on the patient, and it is necessary to peel the adhesion part during reoperation. It can also cause new damage to organs. Therefore, conventionally, in order to prevent adhesion in a damaged tissue, a film-like adhesion preventing material that physically covers a wound part during surgery or the like has been used.

  By the way, in recent years, since the burden on patients can be reduced, cases of performing surgical measures such as surgery under an endoscope are increasing.

  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 Publication No. 2007-529280 (Patent Document 1), a powder-like adhesion preventing material is used, and adhesion prevention is performed together with pressure gas from a nozzle inserted into the body. It is conceivable to treat the material by injecting it into the damaged part of the body. However, depending on the treatment site, there is a case where an operation or the like is performed on the patient lying on the bed from the ceiling surface, or an operation or the like is performed from the side. For example, in the duster of Patent Document 1, the orientation of the duster In some cases, a sufficient amount of the anti-adhesion material may not be ejected, or the anti-adhesion material may be ejected non-uniformly, making it impossible to perform the intended treatment.

Special table 2007-529280 gazette

  Here, the present invention has been made in the background as described above, and the problem to be solved is that medical powder such as an anti-adhesion material is introduced into the body together with the pressure gas introduced aseptically. An object of the present invention is to provide an in-vivo injection device for medical powder having a novel structure capable of stably realizing a predetermined injection state regardless of the injection direction.

  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 a first aspect of the present invention, in a medical powder in-vivo injection device for injecting medical powder together with a pressure gas, a powder storage member for storing the medical powder is rotatably provided. And the medical powder is supplied from the powder containing member to the pressure gas injection passage by a centrifugal force accompanying the rotation of the powder containing member and is injected together with the pressure gas. To do.

  According to the in-vivo injection device for medical powder having the structure according to the first aspect as described above, the medical powder is supplied to the injection passage by the centrifugal force accompanying the rotation of the powder containing member. The difference in the direction of gravity action on the medical powder corresponding to the direction hardly affects the supply of the medical powder to the injection passage. Therefore, the medical powder stored in the powder storage member is stably supplied to the injection passage, and the target medical powder is injected into the body regardless of the orientation of the apparatus.

  In addition, the medical powder inside the member is agitated by the rotation of the powder containing member, so that the medical powder collected in the lower part by gravity can be dispersed before injection and then supplied to the injection passage. Instability of jetting due to powder aggregation is also avoided.

  According to a second aspect of the present invention, in the in-vivo injection device for medical powder described in the first aspect, the injection passage is formed on the outer periphery of the powder containing member over the entire circumference. is there.

  According to the second aspect, since the medical powder is supplied from the rotating powder storage member to the injection passage in the entire circumference, the medical powder is distributed and supplied to the injection passage on the circumference. Thus, stable injection is realized. Further, even when the powder supply hole is partially formed on the circumference, the injection state of the medical powder changes depending on the rotation position on the circumference within one rotation period of the powder container. Therefore, it is possible to achieve substantially constant injection.

  According to a third aspect of the present invention, in the in-vivo injection device for a medical powder described in the first or second aspect, the inside of the powder containing member has a non-rotating body shape, and the powder A powder supply hole communicating with the injection passage is formed through the outermost peripheral end portion of the peripheral wall portion of the body housing member.

  According to the third aspect, since the medical powder stored in the powder storage member is easily guided and gathered at the outermost peripheral end on the periphery when the powder storage member rotates, the medical powder Is supplied to the injection passage through the powder supply hole formed in the outermost peripheral end portion, so that the medical powder hardly remains in the powder containing member.

  According to a fourth aspect of the present invention, in the in-vivo injection device for medical powder according to any one of the first to third aspects, the inner wall surface of the peripheral wall portion of the powder housing member contains the powder. The guide wall surface is inclined with respect to the rotation center axis of the member, and a powder supply hole communicating with the injection passage is formed through the outermost peripheral end portion of the guide wall portion.

  According to the fourth aspect, the medical powder is guided to the outermost peripheral end portion by the guide wall surface during the action of the centrifugal force accompanying the rotation of the powder containing member. Therefore, the required amount of medical powder accommodated in the powder accommodating member is supplied to the injection passage through the powder supply hole.

  According to a fifth aspect of the present invention, in the in-vivo injection device for medical powder according to any one of the first to fourth aspects, the powder containing member is vibrated at the time of rotation. It is what.

  According to the fifth aspect, by rotating the powder containing member while being vibrated by the aggregation preventing means, the medical powder is less likely to remain in the powder containing member. Powder can be stably sprayed.

  In addition, since the medical powder stored in the powder storage member is dispersed by vibration, the aggregation of the medical powder is eliminated before injection, and the medical powder is dispersed and injected.

  According to a sixth aspect of the present invention, in the in-vivo injection device for medical powder according to any one of the first to fifth aspects, the stirring blade portion that disperses the medical powder in the injection passage. Is arranged.

  According to the sixth aspect, the medical powder introduced from the powder containing member into the injection passage is caused by direct contact with the stirring blade portion or the stirring blade portion when moving in the injection passage. Aggregation is eliminated by the action of turbulence. Therefore, the medical powder is sprayed evenly and stably, and a treatment such as adhesion prevention by spraying the medical powder is more efficiently realized.

  According to a seventh aspect of the present invention, in the in-vivo injection device for medical powder according to any one of the first to sixth aspects, the injection passage is partially provided in the passage length direction in the injection passage. The narrowing blade | wing part which is narrowed is arrange | positioned.

  According to the 7th aspect, the flow velocity of the pressure gas which flows through an injection channel is raised by partial constriction of the injection channel by a constriction blade part, and it becomes possible to inject medical powder efficiently. Moreover, since the flow of the pressure gas becomes faster, it is easy to avoid the remaining of the medical powder in the injection passage.

  According to an eighth aspect of the present invention, in the in-vivo injection device for a medical powder according to the seventh aspect, the narrowed blade portion is provided in the powder containing member, and the narrowed blade portion is The blower blade structure is configured to generate an airflow in the injection direction in the injection passage by the rotation of the powder containing member.

  According to the eighth aspect, since the narrowed blade portion has a blower blade structure, in addition to partially narrowing the injection passage with the narrowed blade portion, the airflow in the injection direction generated by the rotation of the narrowed blade portion. Thus, the flow rate of the pressure gas can be further increased. Therefore, the medical powder can be more efficiently transported and injected in the injection direction by the pressure gas, and the remaining of the medical powder in the injection passage is more easily avoided.

  According to a ninth aspect of the present invention, in the in-vivo injection device for a medical powder described in any one of the first to eighth aspects, a rotational output is generated at a proximal end portion of the powder containing member. An output means is attached, and the tip of the powder containing member is rotatably supported.

  According to the ninth aspect, when the powder containing member is rotated by the output means, the opposite side of the powder containing member from the mounting side of the output means is rotatably supported. Rotation operation is more stable. Further, for example, by supporting the front end side of the powder containing member with a slight gap, the powder containing member at the time of rotation is intentionally caused by minute vibration due to the shake of the rotating shaft to prevent the aggregation of the medical powder. It can also be done.

  According to a tenth aspect of the present invention, in the in-vivo injection device for medical powder according to any one of the first to ninth aspects, the powder containing member is attachable to and detachable from an output means for generating a rotational output. It is attached to.

  According to the tenth aspect, depending on the type of medical powder to be injected and the size of the damaged part in the body, the volume and shape, the amount of medical powder supplied to the injection passage per unit time, etc. It is possible to use powder accommodating members selected from a plurality of types different from each other by attaching them to the output means.

  Furthermore, if the used powder container is removed from the output means and discarded to avoid reuse of the powder container, the powder container connected to the internal environment can be kept clean. The medical powder remaining in the powder containing member does not cause a problem at the time of reuse. Moreover, by removing the powder storage member from the output means and replacing it, the output means that is less likely to cause problems such as contamination or residual medical powder can be used repeatedly, reducing costs and effectively using resources. Etc. can be realized.

  According to an eleventh aspect of the present invention, in the in-vivo injection device for medical powder described in any one of the first to tenth aspects, an output means for generating a rotational output is attached to the powder containing member. A power source for supplying power to the output means, and a switching mechanism for switching supply and stop of power from the power source to the output means. The source and the switching mechanism are provided so as to be detachable integrally.

  According to the eleventh aspect, the output means, the power source, and the switching mechanism can be integrally attached and detached in the injection device. Thereby, even when the surface of the injection device and the powder container are contaminated with blood or the like during surgery, the output means, the power source, and the switching mechanism are detached as one unit from the contaminated portion, The detached unit can be reused. As a result, the surface of the injection device directly contacted by the medical staff can be kept clean, and the output means, the power source, and the switching mechanism where contamination is less likely to be a problem can be used repeatedly. Reduction and effective use of resources can be realized.

  According to a twelfth aspect of the present invention, in the in-vivo injection device for medical powder according to any one of the first to eleventh aspects, the powder is interlocked with the switching between the supply and stop of the pressure gas. An interlocking mechanism that switches between rotation and stop of the housing member is provided.

  According to the twelfth aspect, there is no need to separately switch between supply and stop of the pressure gas and rotation and stop of the powder containing member, and the medical powder is injected together with the pressure gas by a simple operation. be able to. Note that if the powder container is rotated without supplying the pressure gas, the medical powder may accumulate at the outlet portion from the powder container to the injection passage. If the rotation of the body housing member functions in conjunction with the body housing member, problems due to such an operation procedure cannot occur.

  According to a thirteenth aspect of the present invention, in the medical powder in-vivo injection device described in any one of the first to twelfth aspects, the powder containing member contains the medical powder. A housing member main body comprising a powder supply port provided with an opening of a powder storage container for supplying the medical powder to the housing space and fitted with the powder; and the powder attached to the housing member main body And a cap member that closes the body supply port.

  According to the thirteenth aspect, the powder containing member has a structure in which the containing member main body and the cap member are combined, and after the medical powder is put into the containing empty space of the containing member main body from the powder storage container Thus, the medical powder can be easily put into the powder containing member by attaching the cap member to the containing member main body and closing the cap. In addition, the powder supply port that communicates with the storage cavity is designed to fit the powder storage container, so that medical powder can be inserted into the storage cavity from the powder storage container. Can be added without spilling powder.

  According to the present invention, since the powder containing member that contains the medical powder is rotatable, the medical powder is ejected from the powder containing member by the centrifugal force accompanying the rotation of the powder containing member. Supplied to the passage. Thereby, the supply of the medical powder to the injection passage is stable regardless of the injection direction, and the target injection is realized in any injection direction.

The perspective view which shows the injection apparatus as the 1st Embodiment of this invention. The right view of the injection device shown in FIG. The right view which shows the injection apparatus shown in FIG. 1 in an internal perspective state. It is a longitudinal cross-sectional view of the injection apparatus shown in FIG. 1, Comprising: IV-IV sectional drawing of FIG. VV sectional drawing of FIG. The perspective view of the accommodating member main body which comprises the injection apparatus shown in FIG. The perspective view which shows the accommodation member main body shown in FIG. 6 at another angle. The right view of the accommodating member main body shown in FIG. The front view of the accommodating member main body shown in FIG. XX sectional drawing of FIG. The right view of the front part which comprises the injection apparatus shown in FIG. The perspective view of the front part shown in FIG. The right view of the rear part which comprises the injection apparatus shown in FIG. FIG. 14 is a rear perspective view shown in FIG. 13. The longitudinal cross-sectional view which shows the injection apparatus as the 2nd Embodiment of this invention. FIG. 16 is a perspective sectional view of the injection device shown in FIG. 15. The longitudinal cross-sectional view which shows the injection apparatus as another one Embodiment of this invention. The perspective view which shows the accommodating member main body which comprises the injection apparatus as the 3rd Embodiment of this invention. The perspective view which shows the accommodation member main body shown in FIG. 18 at another angle. The right view of the accommodating member main body shown in FIG.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 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 pistol shape as a whole, and pushes the pressing portion 14 while gripping the grip portion 12 to inject medical powder together with the pressure gas from the tip of the barrel portion 16. ing. In the following description, in principle, the front-rear direction refers to the left-right direction in FIG. 2 that is the axial direction, and the up-down direction refers to the up-down direction in FIG.

  More specifically, the injection device 10 includes a main body case 20 having a hollow structure including a grip portion 12 and a body portion 18, and a substantially rollover hollow conical cover 22 is detachably attached to the front end of the main body case 20. ing. Furthermore, a tubular barrel portion 16 is attached to the front end of the cover 22 having a small diameter, and communicates with the space in the cover 22.

  Further, the rear portion of the cover 22 has a substantially cylindrical shape, and an intermediate member 24 is attached to the opening thereof. The intermediate member 24 has a substantially hollow truncated cone shape opposite to the cover 22, and a concave groove-shaped seal holding portion 26 that opens to the outer periphery is provided at the front portion. The seal holding part 26 accommodates a seal ring 28 formed of an annular rubber elastic body. The seal holding part 26 is inserted into the rear part of the cover 22 having a substantially cylindrical shape. 22 and the intermediate member 24 are assembled fluid-tightly.

  Further, a powder containing member 30 is disposed between the cover 22 and the intermediate member 24. The powder containing member 30 has a structure in which a cap member 34 is attached to a containing member main body 32.

  As shown in FIGS. 6 to 9, the housing member main body 32 has an intermediate portion in the front-rear direction having a substantially cross-shaped four-sided radial shape when viewed in the front-rear axial direction, and has a non-rotating body shape. A hollow protrusion 35 that protrudes toward the outer periphery is formed every time. Further, the intermediate portion of the accommodating member main body 32 having a cross shape has a substantially small-diameter cylindrical powder supply cylinder portion 36 that forms the front end portion as it goes to the front and rear sides, and a substantially small-diameter columnar shape that forms the rear end portion. The shape converges to the connecting portion 38. Further, a flange-like narrowed blade portion 40 that extends in a direction perpendicular to the axis is integrally formed at an intermediate portion of the housing member main body 32 so as to connect between the circumferential directions of the hollow protrusions 35. Thus, stabilization of the shape of the housing member main body 32 is achieved. Furthermore, as shown in FIGS. 9 and 10, a weight 42 as an aggregation preventing means is attached to a part of the circumference of the narrowed blade portion 40. The weight 42 causes the center of gravity of the housing member main body 32 to deviate from a rotation center axis, which will be described later, so that periodic vibration is generated during rotation.

  Further, the accommodating member main body 32 has a cross-shaped front and rear intermediate portion that is hollow, and an accommodating space 44 that accommodates medical powder described later is formed therein. The housing space 44 is a substantially cross-shaped space whose outermost peripheral end is positioned in four directions on the circumference, and opens forward through the inner hole 45 of the powder supply cylinder portion 36. As used herein, the outermost peripheral edge means a portion farthest in the radial direction from the rotation center axis of the housing member main body 32. In the present embodiment, the entire peripheral wall portion 47 of the housing member main body 32 has a substantially constant thickness, and the inside of the housing member main body 32, that is, the inner peripheral surface, has a non-rotating body shape around the central axis. Further, the inner wall surface of the peripheral wall portion 47 of the housing space 44 in the housing member main body 32 has a guide wall surface 46 that is inclined with respect to the rotation center axis of the housing member main body 32. In the present embodiment, the wall portions on both sides in the axial direction of the accommodation space 44 are inclined with respect to the rotation center axis on both the inner surface and the outer surface. In addition, in the wall part of the accommodation space 44, the part which comprises the hollow protrusion 35 is made into the inclined shape which becomes narrow as it goes to an outer periphery.

  Furthermore, a powder supply hole 48 is formed in the peripheral wall portion 47 of the storage space 44 in the storage member main body 32 at the outermost peripheral end that is the apex of the hollow protrusion 35, and the storage space 44 is powdered. The body supply hole 48 communicates with an injection passage 60 (described later) provided on the outer peripheral side of the housing member main body 32. The powder supply hole 48 is a small-diameter through-hole, and the diameter is appropriately set according to the particle size of the medical powder to be used, but is preferably about 0.1 mm to 1.5 mm. Is done. In the present embodiment, the inner peripheral surface of the outermost peripheral end portion of the hollow protrusion 35 is substantially parallel to the axial direction between the guide wall surfaces 46 on both sides in the axial direction. A body supply hole 48 is formed.

  Further, the housing member main body 32 is integrally formed with a plurality of stirring blade portions 50. The stirring blade portion 50 has a plate shape protruding from the outer peripheral surfaces of the powder supply cylinder portion 36 and the connecting portion 38, and is accommodated from the powder supply cylinder portion 36 and the connecting portion 38 as shown in FIGS. It is provided on the ridge line reaching the outermost peripheral end of the wall portion of the void 44.

  The cap member 34 includes a bottomed cylindrical bearing portion 52 that opens forward, and a front end portion (powder supply) of the powder supply cylinder portion 36 of the housing member body 32 that extends from the opening end of the bearing portion 52 to the outer periphery. And a mounting portion 54 that covers the mouth). The cap member 34 is accommodated by inserting the bearing portion 52 into the powder supply cylinder portion 36 of the accommodation member main body 32 and fitting the attachment portion 54 to the front end portion of the powder supply cylinder portion 36. Attached to the member main body 32, the tip end side of the inner hole 45 that is an opening of the powder supply port is closed. As described above, the cap member 34 is attached to the housing member main body 32, whereby the powder housing member 30 including the housing space 44 is formed.

  Further, the rear portion of the support shaft 56 is fitted into the bearing portion 52 of the cap member 34, and the front portion of the support shaft 56 protruding forward from the bearing portion 52 is in contact with the bearing ring 58 fixed to the cover 22. And is rotatably inserted and supported. Thereby, the powder containing member 30 is allowed to rotate with respect to the cover 22 with the central axis of the support shaft 56 as the substantially rotational central axis. In the present embodiment, the inner diameter of the bearing ring 58 is slightly larger than the outer diameter of the support shaft 56, and the support shaft 56 is inserted into the bearing ring 58 with a gap.

  An injection passage 60 is formed between the inner peripheral surface of the cover 22 and the intermediate member 24 and the outer peripheral surface of the powder containing member 30, and the injection passage 60 communicates with the inner hole of the barrel portion 16 at the front end. In addition, the rear end communicates with a fluid channel 66 described later. The injection passage 60 of the present embodiment is continuously provided over the entire circumference of the powder containing member 30 and is a cylindrical space extending in the front-rear direction. Further, the injection passage 60 communicates with the accommodation space 44 in the powder accommodation member 30 through the powder supply hole 48, and near the opening of the powder supply hole 48 by the narrowed blade portion 40. The channel cross-sectional area is reduced by being partially narrowed. In the present embodiment, the rear end portion of the intermediate member 24 has a cylindrical shape, the injection passage 60 opens rearward, and a thread is formed on the outer peripheral surface of the rear end portion of the intermediate member 24. Yes. Further, the stirring blade portion 50 provided in the front portion of the housing member body 32 is provided in front of the opening portion of the powder supply hole 48 and has a channel cross-sectional area in front of the narrowed portion of the injection passage 60. Is disposed in the enlarged portion, is disposed away from the cover 22 toward the inner periphery, and protrudes into the injection passage 60. On the other hand, the stirring blade portion 50 provided at the rear portion of the housing member main body 32 is provided behind the opening portion of the powder supply hole 48 and is disposed away from the intermediate member 24 toward the inner periphery. , Projecting into the injection passage 60.

  On the other hand, a connection member 62 is attached to the main body case 20. The connecting member 62 is a hard member made of synthetic resin, and has a substantially truncated cone shape with a front portion expanding forward, and a rear portion having a small diameter stepped cylinder shape. . Furthermore, a screw thread that is screwed into the intermediate member 24 is formed on the inner peripheral surface of the rear front end of the connecting member 62 having a cylindrical shape. Further, the connecting member 62 includes an intermediate port 64 protruding downward, and the internal space of the connecting member 62 communicates with the inner cavity of the intermediate port 64 to constitute a part of the fluid flow path 66.

  The fluid flow channel 66 is a flow channel through which the pressure gas flows by being connected to a pressure gas supply source (not shown), and includes the internal space of the pressing portion 14. The pressing portion 14 has a substantially bottomed cylindrical shape that opens forward. The pressing portion 14 is attached to the upper end portion of the grip portion 12 and protrudes rearward, and the grip portion 12 is pressed by pushing the rear surface forward with fingers or the like. It is attached so that it may move to the front. An opening / closing valve 68 is disposed so as to close the opening of the pressing portion 14, and a guide member 70 that holds the opening / closing valve 68 between the pressing portion 14 is fixed to the pressing portion 14. Further, the internal space of the pressing portion 14 is communicated with a connection port 74 provided at the lower end of the grip portion 12 via the tube 72.

  Further, the rear portion of the nozzle 76 is inserted into the guide member 70. The nozzle 76 is a cylindrical member formed of a hard synthetic resin, and is supported by the main body case 20. In an initial state where no external force is applied to the pressing portion 14, the rear portion of the nozzle 76 is inserted into the guide member 70, and the nozzle 76 is separated forward from the opening / closing valve 68, so that the opening / closing valve 68 is shut off. ing. When the pressing portion 14 is pushed forward, the nozzle 76 passes through the notch of the opening / closing valve 68 and communicates with the internal space of the pressing portion 14. In other words, by operating the pressing portion 14, the opening / closing valve 68 is opened and the fluid channel 66 is switched to the communication state.

  In addition, a flange-shaped spring support is provided in the middle portion of the nozzle 76, and a coil spring is disposed between the front and rear facing surfaces of the spring support and the pressing portion 14 and the guide member 70, so that they are pressed forward by fingers. The pressing portion 14 may be urged rearward so that the pressing portion 14 quickly returns to the initial position when the pressing is released.

  Furthermore, a check valve 78 is connected to the front end of the nozzle 76. The check valve 78 allows a gas flow in only one direction, and various known check valves such as a diaphragm type, a ball type, and a disk type may be employed. By arranging such a check valve 78, medical powder, which will be described later, is prevented from flowing back together with the gas from the injection passage 60 to the pressure gas supply source (blower). In addition to or in addition to the check valve 78, a dust collection filter for preventing the passage of medical powder may be provided, so that medical powder described later flows back from the injection passage 60 side. However, the medical powder does not enter the blower or the like, and the failure of the blower or the like is avoided.

  By connecting the front end of the check valve 78 to the intermediate port 64 of the connection member 62 with a pipe or the like, the inner hole of the connection member 62 can be connected to a blower (not shown).

  In addition, an electric motor 80 as an output means is attached to the rear end portion of the connection member 62. The electric motor 80 is disposed such that an output shaft 82 that outputs a rotational force protrudes forward, and a connecting shaft 84 that is externally fitted to the output shaft 82 is rotatably inserted into the connecting member 62. Yes. Further, a power source 85 as a power source such as a battery or a battery for supplying power (electric power) to the electric motor 80 is accommodated in the grip portion 12 and is electrically connected to the electric motor 80.

  Further, the supply and stop of electric power from the power supply 85 to the electric motor 80 are controlled by a switch 86 as a switching mechanism. In the present embodiment, the supply and stop of the pressure gas by a blower (not shown) are switched almost simultaneously with the switch 86 for switching on / off of the electric motor 80 by the operation of the pressing unit 14. The interlocking mechanism is configured. In this embodiment, the electric motor 80, the power source 85, and the switch 86 are separately and independently arranged. However, the electric motor 80, the power source 85, and the switch 86 are unitized to form a unitized electric motor 80. The power source 85 and the switch 86 may be provided so as to be detachable integrally with the grip portion 12. Here, the unit means that the output means, the power source, and the switching mechanism are integrally configured. That is, although not particularly limited, for example, an electric motor 80 as an output means, a power source 85 as a power source, and a switch 86 as a switching mechanism are arranged in the same housing, and the entire housing is attached to the grip portion 12. The thing which enabled insertion and removal integrally is mentioned. According to this, the electric motor 80, the power source 85, and the switch 86 that are expensive and are not exposed to the outside in the state of use are taken out from the grip portion 12 and repeatedly used while easily maintaining cleanliness by appropriately replacing the grip portion 12. You can also

  The injection device 10 according to the present embodiment includes a cartridge unit 90 (see FIGS. 11 and 12) including a cover 22, an intermediate member 24, and a powder storage member 30, a main body case 20, a connection member 62, and each attached thereto A grip operation unit 92 (see FIGS. 13 and 14) including components is detachably attached by screwing the intermediate member 24 and the connection member 62.

  Further, when connecting the cartridge unit 90 and the gripping operation unit 92, the connecting unit 38 provided at the rear end of the powder container 30 is connected to the connecting shaft 84 fixed to the output shaft 82 of the electric motor 80. Butt in the axial direction and detachably connected. That is, a substantially T-shaped engaging groove 94 as shown in FIGS. 7 and 12 is formed on the rear surface of the connecting portion 38, and the front surface of the connecting shaft 84 corresponds to that shown in FIG. A substantially T-shaped engaging protrusion 96 is formed, and the engaging protrusion 96 is inserted into the engaging groove 94, whereby the connecting portion 38 and the connecting shaft 84 are relatively positioned in the direction perpendicular to the axis and in the circumferential direction. Are connected non-adhering. As a result, the front end (front end portion) of the powder containing member 30 is rotatably supported by the cover 22, and the rear end (base end portion) is supported by the output shaft 82 of the electric motor 80 so as to rotate. Has come to be exerted.

  In addition, the ejection passage 60 of the cartridge unit 90 and the fluid channel 66 of the gripping operation unit 92 are in communication with each other, and the pressure pumped from a blower (not shown) in the communication state of the fluid channel 66 with the open / close valve 68 opened. The gas is supplied to the ejection passage 60 through the fluid channel 66. Thereby, the pressure gas supplied from a blower can be injected from the front-end | tip of the barrel part 16 of the injection apparatus 10. FIG.

  The injection device 10 having such a structure is used when, for example, medical powder such as an adhesion preventing material is injected into the body. Below, the case where medical powder is injected to the damaged part by surgery is mentioned as an example, and the usage method of the injection apparatus 10 is demonstrated.

  First, the cap member 34 is removed from the housing member main body 32 before use, and the powder in the powder supply cylinder 36 is opened in the state where the inner hole 45 is opened at the powder supply port which is the front end of the powder supply cylinder 36. A powder storage container (not shown) such as a vial containing medical powder such as an anti-adhesion material is fitted into the supply port, and the medical powder is stored in the cavity 44 by opening the powder storage container downward. Put in. After putting the medical powder, the powder storage container is removed from the powder supply cylinder 36, and the cap member 34 is attached to the powder supply cylinder 36 to close the inner hole 45 including the powder supply port. . Thus, the medical powder is stored in the storage space 44.

  Next, the powder storage member 30 is assembled to the cover 22 and the intermediate member 24 to form the cartridge unit 90, and the cartridge unit 90 is attached to the grip operation unit 92 to configure the ejection device 10.

  And after inserting the barrel part 16 in a body and directing the front-end | tip of the barrel part 16 to spraying target parts, such as a damaged part by the operation under an endoscope, for example, with the thumb of the hand which grasped the grip part 12 Push the pressing part 14 forward. As a result, the opening / closing valve 68 is expanded by the nozzle 76, the fluid channel 66 is switched to the communication state, and the supply of the pressure gas by the blower and the rotational output of the electric motor 80 are started substantially simultaneously.

  Here, the rotational output generated by the electric motor 80 is applied to the powder container 30 via the connecting shaft 84, and the powder container 30 is rotated about the front and rear axes. Thereby, the centrifugal force accompanying the rotation of the powder container 30 acts on the medical powder (not shown) stored in the storage space 44. Then, the medical powder that has moved to the outermost peripheral end is discharged from the accommodation space 44 to the outer periphery through the powder supply hole 48 and supplied into the injection passage 60. In the present embodiment, since the inner wall surface of the accommodation space 44 is configured with an inclined surface that is inclined toward the outermost peripheral end, the medical powder on which the centrifugal force has acted is the inner wall surface of the accommodation space 44. To the outermost peripheral end where the powder supply hole 48 is opened. Thereby, the medical powder in the storage space 44 is supplied to the injection passage 60 without staying in the storage space 44, and an appropriate amount of medical powder can be injected.

  The medical powder supplied into the ejection passage 60 is conveyed to the distal end side of the barrel portion 16 by the pressure gas fed from the fluid flow channel 66 to the ejection passage 60, and enters the body from the distal end opening of the barrel portion 16. Injected with pressure gas. For example, when the medical powder is an adhesion preventing material, it is sprayed onto the wound part by surgery to cover the wound part, and postoperative adhesion is physically prevented.

  According to the in-vivo injection device 10 for a medical powder having a structure according to this embodiment, the powder storage member 30 that stores the medical powder is rotated by the electric motor 80 and is stored in the storage space 44. The accommodated medical powder is supplied to the injection passage 60 through which the pressure gas flows by the action of centrifugal force. Therefore, regardless of the direction of the injection device 10 in use, in other words, the direction of the action of gravity on the medical powder in the injection device 10, the medical powder is stably supplied from the storage space 44 to the injection passage 60. It can be supplied and the target injection of the medical powder can be realized.

  In addition, since the injection passage 60 is continuously formed on the outer peripheral side of the powder containing member 30 over the entire circumference, the powder supply hole 48 connecting the accommodation space 44 and the injection passage 60 is provided with powder. Regardless of the orientation of the housing member 30, the communication state is always set. Therefore, compared with the case where the injection passage 60 is partially provided on the circumference, the supply of the medical powder to the injection passage 60 accompanying the rotation of the powder container 30 is more stably realized. .

  In the present embodiment, the powder supply hole 48 is formed with a sufficiently small diameter so that agglomerated medical powder or the like cannot pass therethrough, and the medical powder is distributed and supplied to the injection passage 60. Is done. Further, the powder containing member 30 is attached with a weight 42 as an aggregation preventing means, and the center of gravity is set at a position deviating from the center of rotation. Aggregation is eliminated by hitting the inner surface of the housing space 44. Accordingly, the dispersed medical powder can be supplied to the injection passage 60 substantially uniformly and stably on the circumference without clogging the powder supply hole 48. Particularly in the present embodiment, the support shaft 56 provided at the front end of the powder containing member 30 has a smaller diameter than the inner diameter of the bearing ring 58, and the rear end of the powder containing member 30 is relative to the connecting shaft 84. Since they are connected in a non-fixed manner, vibration due to a shift in the center of gravity of the powder container 30 is effectively generated.

  Further, the stirring blade portion 50 of the housing member body 32 protrudes from the ejection passage 60, and the stirring blade portion 50 that rotates together with the housing member body 32 stirs the medical powder in the ejection passage 60. As a result, the medical powder is further finely dispersed and more uniform injection is realized. Further, in this embodiment, since the injection passage 60 is partially narrowed by the narrowing blade portion 40 in the vicinity of the opening of the powder supply hole 48, an increase in the flow velocity of the pressure gas due to the venturi effect is expected in this portion. In addition, it is possible to efficiently move the medical powder from the accommodation space 44 to the injection passage 60 and to promote the dispersion of the medical powder in the injection passage 60. In particular, the medical powder that has been vigorously carried forward by the Venturi effect is not only more efficiently dispersed in a wide space in front, but is also agitated by the agitating blade portion 50, so that the dispersion is more effective. Is realized. In addition, since the stirring blade part 50 is distribute | arranged ahead rather than the constriction part, arrangement | positioning space is fully ensured and the outstanding stirring effect | action is exhibited. Further, in this embodiment, the narrowed blade portion 40 is integrally formed with the powder containing member 30, but the narrowed blade portion may be formed separately from the powder containing member 30 and fixed later. It may be provided on the cover 22 side.

  In the present embodiment, the operation of pushing the pressing portion 14 forward causes the output of the electric motor 80, the supply of the pressure gas by the blower, and the communication of the fluid flow channel 66 by opening the opening / closing valve 68 to be interlocked. To be generated. Accordingly, the operations required for injection can be collectively controlled without requiring a plurality of operations, and can be used easily and quickly. Further, by returning the pressing portion 14 to the initial position, the output stop of the electric motor 80, the supply stop of the pressure gas by the blower, and the shutoff of the fluid flow channel 66 by closing the opening / closing valve 68 occur in conjunction with each other. Therefore, the operation at the end of injection can be performed easily and promptly. Although not shown in the drawing, it is desirable that the pressing unit 14 is biased at least in a forward pressing state so that the pressing unit 14 returns to the initial position by releasing the pressing of the pressing unit 14 with a finger. Thus, it is possible to intuitively start and stop the injection by a very simple operation of pressing the pressing portion 14 and releasing it.

  In addition, since the fluid flow path 66 includes a check valve 78 that prevents backflow, the medical powder remaining in the injection passage 60 after stopping the injection flows back through the fluid flow path 66. Thus, the pressure gas source can be prevented from reaching the source. As a result, failure of the blower and the like due to intrusion of medical powder through the fluid channel 66 is avoided, and reliability and durability are improved.

  In the injection device 10 according to the present embodiment, the cartridge unit 90 directly touches the medical powder and is connected to the internal environment of the patient, and the rear part is the electric motor 80, the power source 85, and the switch. It is a relatively expensive part with electrical components such as 86. Since the cartridge unit 90 and the gripping operation unit 92 are detachably attached, the cartridge unit 90 is removed from the gripping operation unit 92 and discarded after use, and the rear part is attached with a new cartridge unit 90 and reused. You can also Thereby, the cartridge part 90 which becomes a problem due to adhesion of medical powder after use or contamination due to connection to the internal environment can be kept clean by always replacing it with a new one. By repeatedly using the rear part where contamination by the body and body environment is not a problem, cost and manufacturing resources can be reduced.

  In addition, considering the type and particle size of the medical powder used, the amount to be sprayed, the ease of aggregation, etc., the diameter and position and number of powder supply holes, the structure and arrangement of the injection passage, and accommodation Appropriate ones can be selected and used from a plurality of types of cartridges having different void volumes and structures of vibration generating means such as weights. Similarly, a plurality of different types of gripping operation units may be prepared, and an appropriate one selected from the plurality of types of gripping operation units may be used. For example, according to the size of the user's hand It is conceivable that the size of the grip portion can be selected. Also, for example, instead of an electric motor as an output means for rotating the powder containing member, a gripping operation unit having an air pressure or a human power, or an extension of the rotation center axis (front / rear axis) instead of a pistol type grip Any gripping operation unit including a grip portion extending upward can be employed.

  FIG. 15 shows an in-vivo injection device 100 for medical powder as a second embodiment of the present invention. In the following description, members and portions that are substantially the same as those in the first embodiment are denoted by the same reference numerals in the drawings, and the description thereof is omitted.

  More specifically, the injection device 100 includes a connection member 102 that is attached to the body portion 18. The connecting member 102 has a tapered cylindrical shape with the front portion expanding toward the front, the rear portion has a stepped cylindrical shape, and the electric motor 80 is attached to the rear end portion. Further, a concave groove-like seal holding portion 104 that is continuous over the entire circumference is integrally formed at the front end portion of the connecting member 102 and is opened to the outer periphery. An annular seal ring 28 is formed on the seal holding portion 104. It is arranged. In the connecting member 102, the locking claw 106 protruding from the wall portion of the seal holding portion 104 is locked in the axial direction in the opening portion of the trunk portion 18, and the rear portion is clamped by the trunk portion 18. Is attached to the body 18.

  In addition, a powder container 108 is disposed between the connection member 102 and the cover 22. The powder containing member 108 has a structure in which a cap member 112 is attached to the containing member main body 110. As shown in FIG. 16, the housing member main body 110 has a three-way radial shape in which three hollow protrusions 114 convex toward the outer periphery are formed every 120 ° on the circumference. The outermost peripheral end is set at the tip, and a powder supply hole 48 is formed therethrough. Further, in the housing member main body 110 of this embodiment, a connecting shaft 116 is integrally formed at the rear end portion, and the connecting shaft 116 is fixed to the output shaft 82 of the electric motor 80. The housing member main body 110 has radial shapes on the front and rear sides with respect to the narrowed blade portion 40, the wall inner surfaces on both sides in the circumferential direction are inclined toward the outermost peripheral end, and the front and rear outer sides from the outermost peripheral end. Inclined gradually toward the center axis of rotation.

  A stirring blade portion 118 that extends outside the housing member main body 110 is integrally formed behind the attachment portion 54 in the cap member 112. The stirring blade portion 118 extends in the front-rear direction while being inclined in the circumferential direction, and is disposed in the injection passage 60 formed between the housing member main body 110 and the cover 22. Further, the rear end portion of the stirring blade portion 118 of the present embodiment extends in the circumferential direction with a substantially constant radius of curvature, and the rear end surface is overlapped with the outer peripheral end portion of the narrowed blade portion 40 from the front. Thereby, the stirring blade portion 118 constitutes a narrowed blade portion that partially narrows the injection passage 60 in the injection direction together with the narrowed blade portion 40.

  In the in-vivo injection device 100 for a medical powder having a structure according to the present embodiment as described above, the centrifugal force acting on the medical powder is stable regardless of the direction of use, as in the first embodiment. Injection is realized. Further, compared to the first embodiment, the connection structure between the powder containing member 108 and the electric motor 80 is simplified, and the number of parts can be reduced and the manufacturing can be facilitated.

  Moreover, as shown in this embodiment, the stirring blade part 118 which stirs and disperse | distributes medical powder in the injection channel 60 may be provided in the cap member 112, and the stirring blade part 50 is the accommodation member. The effect substantially the same as 1st Embodiment provided in the main body 32 can be anticipated. However, it is desirable that the stirring blade portion be provided on the rotating powder container member side. However, if the stirring blade portion protrudes into the injection passage 60, for example, even if it is provided on the cover 22 side, the medical powder is dispersed. Can be achieved.

  In the structure shown in the present embodiment, as shown in FIG. 17, a housing member main body 120 having a small volume of the housing space 44 can be employed. Also in this case, the same effect as the first and second embodiments is exhibited. Moreover, since the stirring blade portion 118 is provided not on the housing member main body 120 but on the cap member 112, the difference in the injection characteristics due to the difference in the shapes of the stirring blade portion 118 and the first half of the injection passage 60 is reduced.

  18 to 20 show a housing member main body 130 that constitutes an in-vivo injection device for medical powder as a third embodiment of the present invention. The housing member main body 130 is provided with two hollow protrusions 35 on the upper and lower sides and a narrowed blade portion 134 at the front and rear intermediate portion.

  More specifically, as shown in FIGS. 18 to 20, the narrowed blade portion 134 is composed of a plurality of blades 136 arranged radially on the circumference. The blades 136 are respectively inclined at a predetermined angle with respect to the front-rear direction, which is the injection direction of the injection passage 60, and the narrowed blade portion 134 rotates together with the powder containing member to move forward. A flowing airflow is generated. In this embodiment, only one blade 136 is provided with a weight 42, and vibration occurs due to a shift in the center of gravity with respect to the center of rotation when the powder containing member is rotated by an electric motor 80 described later. Yes.

  The housing member main body 130 is configured with a powder housing member by attaching a cap member (not shown) to the front end, and is housed in the body case 20 and the injection passage 60 as in the first and second embodiments. The connecting portion 138 provided at the rear end of the housing member main body 130 is connected to the output shaft 82 of the electric motor 80 in an extrapolated state. Thereby, the powder containing member including the containing member main body 130 can be rotated around the front and rear central axes by the rotational driving force of the electric motor 80.

  When the powder container is rotated by the rotational driving force of the electric motor 80, the medical powder stored in the storage space 44 of the storage member main body 130 is powder as in the first and second embodiments. The medical powder is supplied to the injection passage 60 through the supply hole 48 and is injected forward by the pressure gas flowing through the injection passage 60.

  Further, a narrowing blade portion 134 is provided in the vicinity of the rear of the powder supply hole 48, and the passage cross-sectional area of the injection passage 60 is partially reduced by a portion of the passage length direction by the narrowing blade portion 134. Yes. Thereby, the flow velocity of the pressure gas is increased by the venturi effect, and the medical powder supplied from the powder supply hole 48 to the injection passage 60 is efficiently carried forward by the pressure gas flowing vigorously. Is injected.

  In addition, in the present embodiment, the narrowed blade portion 134 has a structure including a plurality of blades 136, and an air flow forward (injection direction in the injection passage 60) like a fan is generated by the rotation of the housing member main body 130. It has a blower blade structure. Accordingly, the pressure gas flowing through the injection passage 60 is further accelerated by the rotation of the narrowing blade portion 134, so that the medical powder is more difficult to stay in the injection passage 60 and the entire amount of the medical powder is efficiently used. Can be injected.

  In particular, the narrowed blade part 134 devised in shape so as to have a blower blade structure is provided only in the rotatable housing member main body, without increasing the performance of a blower or the like that causes pressure gas to flow into the injection passage 60. Since the pressure of the pressure gas can be increased to prevent the medical powder from remaining, effective injection can be realized with a low-cost and compact device configuration.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the structure of the first embodiment, the method for connecting the cartridge unit 90 and the grip operation unit 92 is not limited to the screwing using the illustrated screws. Specifically, for example, it may be mechanically locked in the axial direction by being pushed in and fitted in the axial direction, or may be connected by frictional resistance by press-fitting.

  Further, the shape of the housing member main body does not necessarily have a radial shape when viewed in the axial direction. For example, a polygonal shape such as a triangle or a quadrangle when viewed in the axial direction can be suitably employed. Furthermore, considering the efficiency of discharging the medical powder from the empty space for storing the medical powder into the injection passage, the receiving member main body is preferably a non-rotating body having a corner on the circumference as described above. A circular rotating body shape can also be used in the present invention.

  Furthermore, the inner wall surface of the housing space is preferably a guide wall surface that is inclined with respect to the rotation center axis of the powder housing member, but the housing space having a wall inner surface substantially parallel to the rotation center axis. Can also be employed. Specifically, for example, the accommodation space may be a columnar space. In this case, the powder supply holes are provided at a plurality of positions in the axial direction, or slit-shaped extending in a predetermined length in the axial direction. By adopting the powder supply hole, the medical powder can be efficiently discharged from the accommodation space.

  Further, the aggregation preventing means for applying vibration during rotation of the powder containing member is not limited to a structure in which a separate weight is attached. For example, the center of gravity position is set to a position deviated from the rotational center by the shape of the containing member main body. However, the same effect can be obtained. In addition, protrusions may be formed on the outer peripheral surface of the housing member main body and the inner peripheral surface of the cover, and vibration may be generated by the contact of the protrusions.

  Further, the rotation and stop of the powder container, the supply and stop of the pressure gas, and the opening / closing operation of the opening / closing valve do not necessarily occur in conjunction with one operation, but require separate operations. Also good. For example, when the powder container is turned manually (manually), a rotational force is applied to the powder container after starting the supply of pressure gas and opening the opening / closing valve. .

  Further, the size, number, arrangement and the like of the powder supply holes 48 are not particularly limited, and can be appropriately changed according to the shape of the housing member main body 32 and the like. For example, the powder supply hole 48 may be provided at a position away from the outermost peripheral end portion in addition to or in place of the outermost peripheral end portion of the wall portion of the accommodation space 44. Furthermore, the powder supply hole 48 may be formed, for example, as a slit extending continuously in the circumferential direction at a predetermined length or over the entire circumference. In addition, the injection passage 60 is not limited to the one formed on the outer peripheral side of the powder container 30 over the entire circumference, and one or a plurality of injection passages extending in the front-rear direction are partially formed on the circumference. May be.

  Further, the shape, position, operation method, and the like of the pressing portion 14 are merely examples and are not particularly limited. Specifically, for example, it may be provided in front of the grip portion in the form of a pistol trigger, or may be operated by stepping on a foot switch provided outside.

10, 100: In-vivo injection device for medical powder, 14: Pressing portion (interlocking mechanism), 30, 108: Powder housing member, 32, 110, 120, 130: Housing member body, 34, 112: Cap member, 36: Powder supply cylinder part (powder supply port), 40, 134: Narrow blade part, 42: Weight, 44: Storage space, 45: Inner hole (powder supply port), 46: Guide wall surface, 47: Peripheral wall part, 48: powder supply hole, 50, 118: stirring blade part, 60: injection passage, 80: electric motor (output means), 85: power source (power source), 86: switch (switching mechanism, interlocking mechanism)

Claims (13)

In the medical powder injection device for injecting medical powder together with pressure gas,
A powder storage member for storing the medical powder is rotatably provided, and the pressure gas is injected from the powder storage member by a centrifugal force accompanying the rotation of the powder storage member. An in-vivo injection device for medical powder, which is supplied to a passage and injected together with the pressure gas.   The in-vivo injection device for medical powder according to claim 1, wherein the injection passage is formed on the outer periphery of the powder containing member over the entire periphery.   The inside of the powder containing member has a non-rotating body shape, and a powder supply hole communicating with the injection passage is formed through the outermost peripheral end portion of the peripheral wall portion of the powder containing member. Item 3. The medical powder internal injection device according to Item 1 or 2.   The inner wall surface of the peripheral wall portion of the powder containing member is a guide wall surface that is inclined with respect to the rotation center axis of the powder containing member, and the outermost end portion of the powder containing member is connected to the injection passage. The in-vivo injection device for medical powder according to any one of claims 1 to 3, wherein a communicating powder supply hole is formed so as to penetrate therethrough.   The medical powder in-vivo injection device according to any one of claims 1 to 4, further comprising aggregation preventing means that vibrates the powder containing member during rotation.   The in-vivo injection device for medical powder according to any one of claims 1 to 5, wherein a stirring blade portion for dispersing the medical powder is disposed in the injection passage.   The medical powder in-vivo injection device according to any one of claims 1 to 6, wherein the injection passage is provided with a narrowed blade portion that partially narrows the injection passage in a passage length direction.   The narrowing blade portion is provided in the powder containing member, and the narrowing blade portion has a blower blade structure that generates an airflow in an injection direction in the injection passage by rotation of the powder containing member. 8. A medical powder internal injection device according to 7.   Output means for generating rotational output is attached to the base end portion of the powder containing member, and the tip end portion of the powder containing member is rotatably supported. The medical powder injection device according to item.   The medical powder in-vivo injection device according to any one of claims 1 to 9, wherein the powder containing member is detachably attached to an output means for generating a rotational output.   Output means for generating rotational output is attached to the powder containing member, a power source for supplying power to the output means is provided, and power supply from the power source to the output means is stopped. The medical powder body according to any one of claims 1 to 10, further comprising a switching mechanism for switching between the first and second output means, a power source, and a switching mechanism that are integrally detachable. Injection device.   The in-vivo injection of medical powder according to any one of claims 1 to 11, further comprising an interlocking mechanism that switches between rotation and stop of the powder containing member in conjunction with switching between supply and stop of the pressure gas. apparatus.   The powder storage member includes a storage space for storing the medical powder and a powder supply port into which an opening of a powder storage container for supplying the medical powder is fitted into the storage space. The medical powder according to any one of claims 1 to 12, comprising: a housing member main body provided; and a cap member that is attached to the housing member main body and closes the powder supply port. In-vivo injection device.