JP2016022259A - Medical powder internal injection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical powder internal injection device with novel structure that is easily held by a user and stably operated regardless of an injection direction, when medical power such as an antiadhesive material is injected to the inside of a body along with a pressure gas.SOLUTION: A medical powder internal injection device 10 comprises: a body part 18 including an injection passage 28 for injecting the medical powder along with the pressure air, and a grip part 12 to be held in the hand; and operation means 32 provided on the body part 18, and operated, by the hand holding the grip part 12, to switch between the injection and stop of the medical powder. The medical power internal injection device 10 further includes an injection-direction setting mechanism for changing the direction of an injection nozzle part 16 at a tip end of the injection passage 28.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 surgery or the like is performed from the ceiling surface on the patient lying on the bed, or surgery or the like is performed from the side surface. For example, in the duster shown in FIG. If the duster is tilted and used, there is a risk that the handle is difficult to grasp or the operation of spraying the anti-adhesion material becomes difficult.

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. When injecting, for example, an endoscopic device for medical powder with a novel structure that can be easily grasped and stably operated by a user regardless of the injection direction even in endoscopic surgery or the like It is to provide.

  The first aspect of the present invention is provided with an injection passage for injecting medical powder together with a pressure gas. On the other hand, the first embodiment of the present invention has a holding portion for a main body portion having a holding portion that can be held by hand. In the in-vivo injection device for medical powder provided with an operation means capable of switching between injection and stop of the medical powder by operating with an open hand, the direction of the injection nozzle portion at the tip portion of the injection passage is changed An injection direction setting mechanism is provided.

  According to the in-vivo injection device for medical powder having a structure according to this aspect, by providing the injection direction setting mechanism and changing the direction of the injection nozzle portion, when injecting medical powder into the body, Regardless of the injection direction, it is possible to stably hold and operate the holding portion of the injection device. Accordingly, for example, a patient who lies on a bed can easily perform a treatment from any direction such as a ceiling surface or a side surface, and the burden on the medical staff can be reduced.

  According to a second aspect of the present invention, in the in-vivo injection device for medical powder according to the first aspect, the injection passage includes a flexible passage portion connected to a proximal end side of the injection nozzle portion. The injection direction setting mechanism is configured, and the direction of the injection nozzle portion is changed by bending and deforming the flexible passage portion.

  According to the in-vivo injection device for medical powder having a structure according to this aspect, the direction of the injection nozzle portion is changed by bending and deforming the flexible passage portion connected to the proximal end side of the injection nozzle portion. Therefore, a mechanism that allows a change in the direction of the injection nozzle portion can be easily realized. In addition, when changing the direction of the injection nozzle portion, the injection passage is gently curved, so that the medical powder can be smoothly injected.

  According to a third aspect of the present invention, in the in-vivo injection device for medical powder according to the first or second aspect, by positioning the injection nozzle portion with respect to the main body portion, A positioning mechanism for setting the direction to be releasable is provided.

  According to the in-vivo injection device for medical powder having a structure according to this aspect, the injection nozzle portion positioning mechanism is provided, and the direction of the injection nozzle portion can be determined temporarily and fixed. In addition, the medical powder can be more stably ejected in a specific ejection direction. In particular, since the positioning mechanism is set to be releasable, for example, the direction of the injection nozzle portion can be easily changed and determined even during surgery.

  According to a fourth aspect of the present invention, there is provided the in-vivo injection device for medical powder according to any one of the first to third aspects, wherein the main body portion contains the medical powder. Including a powder flow path communicating with a powder container attached to the container holder and a gas flow path to which the pressure gas is supplied from the outside. An injection passage is configured.

  According to the in-vivo injection device for medical powder having a structure according to this aspect, the container holder of the powder container is provided in the main body portion, so that the support state of the powder container by the container holder is kept substantially constant. However, it is also possible to change the direction of the injection nozzle part. Further, since the powder passage for supplying the medical powder and the gas passage for supplying the pressure gas are separately provided in the injection passage, different types of medical use can be obtained by changing the powder container. It is also possible to spray the powder appropriately.

  According to a fifth aspect of the present invention, there is provided the in-vivo injection device for medical powder according to any one of the first to fourth aspects, wherein the direction of the injection nozzle portion changed by the injection direction setting mechanism is changed. The powder container attached to the container holder can be swingably changed within a predetermined angle range along a plane including the central axis of the powder container.

  According to the in-vivo injection device for a medical powder having a structure according to this aspect, the direction of the injection nozzle portion can be changed in a swinging manner within a predetermined angle range. In particular, since the injection nozzle can be changed in a swinging manner within a predetermined plane, the injection nozzle is inadvertently displaced to the side or the like without complicating the support mechanism of the injection nozzle in the main body, for example. It is also possible to prevent this from happening.

  According to a sixth aspect of the present invention, there is provided the in-vivo injection device for medical powder according to any one of the first to fifth aspects, wherein the injection nozzle portion at the tip portion is detachable in the injection passage. It is a structure.

  According to the in-vivo injection device for a medical powder having a structure according to this aspect, since the injection nozzle portion is detachable, for example, the medical powder is gelled with moisture in the abdominal cavity to form the injection nozzle portion. Even if clogging occurs, such a problem can be solved by replacing only the injection nozzle part, and for example, it is possible to appropriately select and use an injection nozzle part having a different length or diameter.

  According to a seventh aspect of the present invention, there is provided the in-vivo injection device for medical powder according to any one of the first to sixth aspects, wherein the gripping portion of the main body portion does not specify a gripping direction by a hand. It is a substantially rotationally symmetric shape.

  According to the in-vivo injection device for a medical powder having a structure according to this aspect, since the gripping portion is substantially rotationally symmetric, it is possible for a medical worker to grip from any direction. The Thereby, the medical powder can be stably ejected from any direction during the treatment of the patient. It should be noted that the gripping portion has a substantially rotationally symmetric shape as long as the medical staff can equally grip from any direction on the circumference, and does not have to be a geometrically strict rotationally symmetric shape. . That is, for example, the outer peripheral surface of the gripping portion may be provided with irregularities at predetermined intervals in the circumferential direction so as to have an anti-slip function.

  According to an eighth aspect of the present invention, in the in-vivo injection device for medical powder according to the seventh aspect, an operating portion by hand in the operating means is provided on the outer end surface of the grip portion. It is what.

  According to the in-vivo injection device for medical powder having a structure according to this aspect, since the operation unit is provided on the outer end surface of the gripping part, the gripping part can be used without re-gripping the gripping part. The operation can be performed. In particular, for example, when the operation unit is operated from the palm of the hand, the operation force can be stably applied to the operation unit regardless of the direction of the ejection device. Also, even when holding the torso between the index finger and middle finger like a general syringe and operating the operation part with the thumb, the operation force can be stably exerted on the operation part regardless of the direction of the injection device. it can.

  According to a ninth aspect of the present invention, in the in-vivo injection device for medical powder according to the seventh or eighth aspect, a pressing portion that is positioned on a proximal end side of the grip portion and is rotatable in the circumferential direction. It is provided.

  According to the in-vivo injection device for medical powder having a structure according to this aspect, since the pressing portion located on the proximal end side of the gripping portion is rotatable in the circumferential direction, for example, from the pressing portion to the outside When the pipe line extends, the circumferential position of the external pipe line can be adjusted. Therefore, the target injection operation can be performed satisfactorily regardless of the direction of the injection device without causing the external pipe line to get in the way.

  In the in-vivo injection device for medical powder having a structure according to the present invention, the direction of the injection nozzle portion can be changed by providing an injection direction setting mechanism, regardless of the injection direction of the medical powder. It becomes possible to operate the injection device stably.

BRIEF DESCRIPTION OF THE DRAWINGS The front view which shows the whole medical powder in-vivo injection apparatus as the 1st Embodiment of this invention. The perspective view which shows the whole structure of the in-vivo injection apparatus of the medical powder shown by FIG. FIG. 2 is a left side view of the medical powder in-vivo injection device shown in FIG. 1. IV-IV sectional drawing in FIG. The front view which shows the state which changed the direction of the injection nozzle part of the in-vivo injection apparatus of the medical powder shown by FIG. FIG. 6 is a longitudinal sectional view of the medical powder internal injection device shown in FIG. 5. The longitudinal cross-sectional view which shows the injection state of the medical powder internal injection apparatus shown by FIG. The front view which shows the whole in-vivo injection apparatus of the medical powder as the 2nd Embodiment of this invention. FIG. 9 is a perspective view showing the overall structure of the medical powder internal injection device shown in FIG. 8. FIG. 9 is a left side view of the medical powder internal injection device shown in FIG. 8. XI-XI sectional drawing in FIG. The longitudinal cross-sectional view which shows the injection state of the internal injection apparatus of the medical powder shown by FIG.

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

  First, FIGS. 1 to 4 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. By operating the piston-like pressing portion 14 while holding the holding portion 12, the medical powder is fed together with the pressure gas from the tip of the injection nozzle portion 16. It comes to inject. 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.

  More specifically, the injection device 10 is configured such that a device main body 18 as a main body portion includes a hollow body portion 20 and a pressing portion 14 attached to the body portion 20. The body portion 20 is generally shaped like a syringe, and a flange-like flange portion 22 is formed on the proximal end portion of the body portion 20 so as to protrude to the outer periphery over the entire circumference in the circumferential direction. The body portion 20 has a divided structure in the width direction (the left-right direction in FIG. 3), and is formed by overlapping and fixing the end faces of the half-cut cylindrical members by bonding or fitting. Yes.

  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 at the base end portion of the apparatus main body 18, and the outer diameter dimension at the distal end is made larger than the inner diameter dimension at the base end of the body portion 20. The pressing portion 14 is prevented from coming out from the trunk portion 20 to the proximal end side. The base end portion of the pressing portion 14 protrudes to the outer peripheral side over the entire circumference in the circumferential direction, and the base end surface is a circular operation portion 24. In the injection device 10, the proximal end side of the flange portion 22 including the pressing portion 14 is the grip portion 12. In the present embodiment, since the grip portion 12 is substantially circular when viewed in the axial direction, the grip portion 12 has a substantially rotationally symmetric shape in which the grip direction is not specified. It can be gripped even from the outside.

  On the other hand, an injection nozzle portion 16 extending toward the distal end side is provided at the distal end of the body portion 20, and the injection nozzle portion 16 has a single tube structure by the tubular body 26. An injection passage 28 extending from the end of the pressing portion 14 to the tip of the injection nozzle portion 16 is provided inside the injection device 10.

  The base end side portion of the injection passage 28 is constituted by an internal passage 29 provided inside the pressing portion 14. The internal passage 29 extends in the axial direction from the tip of the pressing portion 14, bends downward near the operation portion 24, and extends to the outside. The base end of the internal passage 29 opens to the outside as a connection port 30. ing. An external pneumatic line is connected to the connection port 30 so that the proximal end side of the injection passage 28 communicates with a positive pressure source such as a compressor or an accumulator. Further, the pressing portion 14 is rotatable in the circumferential direction around the central axis of the body portion 20, and the connecting port 30 can arbitrarily adjust the extending direction with the rotation of the pressing portion 14. On the other hand, the tip side portion of the injection passage 28 is constituted by the injection nozzle portion 16 formed of the tubular body 26.

  Further, an operation means 32 for switching the injection passage 28 between a communication state and a cutoff state and a powder supply mechanism 34 for supplying medical powder into the injection passage 28 are provided at an intermediate portion of the injection passage 28. . By operating this operating means 32, it is possible to switch between injection and stop of medical powder.

  The operation means 32 includes a pressing portion 14 and an opening / closing valve 36, and transmits an external operating force applied to the pressing portion 14 to the opening / closing valve 36, thereby switching the opening / closing valve 36 and the injection passage 28 to open / close. It is supposed to let you. Various known structures can be employed as the on-off valve 36. In this embodiment, a sealing valve is disposed at the tip of the internal passage 29, and a fixed nozzle 38 is provided at the tip of the sealing valve. The internal passage 29 is communicated with the fixed nozzle 38 by inserting the fixed nozzle 38 into the sealing valve, while the internal passage 29 is sealed by pulling out the fixed nozzle 38. The thing of the structure intercepted is adopted.

  A cylindrical member 40 extending in the axial direction is provided at the tip of the pressing portion 14, and a sealing valve is sandwiched and fixed between the pressing portion 14 and the cylindrical member 40 by adhesion or the like. On the other hand, the fixed nozzle 38 provided on the distal end side of the sealing valve is fixed inside the proximal end portion of the trunk portion 20, extends to the proximal end side, and the extended distal end of the fixed nozzle 38 is a tubular member. 40 inside. Further, a spring 42 as a biasing means is provided in a compressed state on the outer peripheral side of the cylindrical member 40 between the fixed portion of the fixed nozzle 38 and the cylindrical member 40. As a result, the pressing portion 14 is constantly biased toward the base end side.

  Thus, in the initial state, the pressing portion 14 is elastically positioned to the proximal end side moving end, the fixed nozzle 38 and the sealing valve are separated from each other by a predetermined distance, and the on-off valve 36 is held in the shut-off state. It has come to be. On the other hand, when the pressing portion 14 is pushed toward the tip side against the urging force, the fixed nozzle 38 enters the sealing valve and the injection passage 28 is brought into a communication state. Further, by releasing the pushing force on the pressing portion 14, the pressing portion 14 is automatically returned to the initial position.

  Further, a holding member 43 is provided in the body portion 20 on the distal end side of the fixed nozzle 38. 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 tubular body 26, while the proximal end of the relay passage 44 is the fixed nozzle 38. Connected to the tip. Thus, an injection passage 28 is formed that extends from the internal passage 29 of the pressing portion 14 to the tip of the injection nozzle portion 16 via the fixed nozzle 38 and the relay passage 44. The proximal end of the relay passage 44 and the distal end of the fixed nozzle 38 are connected by a flexible tube body.

  Furthermore, the front end of the trunk portion 20 is provided with a movement allowing portion 46 having a substantially sector shape with a central angle of 90 degrees when viewed from the front. The movement-permitting portion 46 has a fan-shaped arc portion facing downward from the tip of the injection device 10. The movement-permitting portion 46 has a central portion in the width direction at the inside of the apparatus main body 18 from the front end to the lower end. A through window 47 that communicates with the outside is formed. Further, guide grooves 48 and 48 extending in the circumferential direction are formed in the vicinity of the arc portion on both sides in the width direction on the inner surface of the movement allowing portion 46. The guide grooves 48, 48 are formed along a surface that extends in the vertical direction (up and down direction).

  On the other hand, a substantially cylindrical fixing member 50 is fitted and fixed to the proximal end portion of the tubular body 26, and a male screw is formed on the outer peripheral surface of the fixing member 50. Furthermore, a substantially cylindrical support member 52 is provided on the proximal end side of the fixing member 50, and an outer cylinder portion 54 extending to the distal end side is integrally formed on the outer peripheral side of the support member 52. An internal thread is formed on the inner peripheral surface of the outer cylinder portion 54.

  Further, support protrusions 56, 56 projecting outward are provided on both sides in the width direction on the outer peripheral surface of the outer cylinder portion 54, and are fitted into the guide grooves 48, 48 of the movement allowance portion 46. Thereby, in the movement permission part 46 of the apparatus main body 18, the support member 52 and the distal end portion of the outer cylinder part 54 protrude outside through the through window 47. The fixing member 50 and the support member 52 are fixed in a luer lock manner, so that the fixing member 50 and the tubular body 26 extend from the tip of the support member 52 to the tip side. Thereby, the tubular body 26 is detachably fixed to the support member 52, that is, the apparatus main body 18.

  The support protrusions 56 and 56 are movable in the guide grooves 48 and 48, and the direction of the support member 52 and the tubular body 26 connected thereto can be changed by the movement of the support protrusions 56 and 56. . That is, the direction of the tubular body 26 can be changed in a swinging manner along the guide grooves 48, 48, and the angle range thereof is, for example, the size of the central angle formed by the guide grooves 48, 48 and the through window 47. It is determined by the opening length and the like.

  Further, the distal end of the relay passage 44 and the proximal end of the support member 52 are connected by a flexible tube 58 as a flexible passage portion, whereby the distal end of the relay passage 44 and the proximal end of the tubular body 26 are connected. And are connected. In short, the gas flow path to which the pressure gas is supplied from the external pressure source includes the internal passage 29, the fixed nozzle 38, the relay passage 44, the flexible tube 58, and the tubular body 26.

  On the other hand, as the powder supply mechanism 34, the holding member 43 is provided with a container holder 60 exposed upward from the body portion 20, and a powder container containing medical powder in the container holder 60. 62 is detachably mounted. 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. For example, the powder can be applied to medical powder such as a hemostatic material and various drugs in addition to the adhesion preventing material described in Patent Document 1. Accordingly, the powder container 62 and the container holder 60 that are employed can be set as appropriate.

  The holding member 43 is formed with a powder supply path 64 that extends from the formation portion of the container holder 60 toward the relay path 44. Then, by attaching the powder container 62 to the container holder 60 with its opening facing downward, the inside of the powder container 62 is communicated with the relay passage 44 through the powder supply path 64, and the powder container 62 is connected to the powder container 62. The stored medical powder is supplied to the relay passage 44. Therefore, in the present embodiment, the powder flow path is configured by the powder supply path 64, and the medical powder injection path 28 includes the gas flow path and the powder flow path.

  Furthermore, the holding member 43 is equipped with a vibration mechanism 66. As this vibration mechanism 66, for example, a known one disclosed in JP 2012-143502 A can be employed. That is, the eccentric rotating body 68 is assembled to the lower part of the holding member 43 so as to be rotatable about the central axis, and the eccentric pressure is exerted by the fluid pressure exerted through the branch passage 70 branched from the front end side of the fixed side nozzle 38. The rotating 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 exerted on the sawtooth 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. Then, the powder container 62 is vibrated to prevent clogging or clogging of medical powder inside the powder container 62, the powder supply path 64, etc., and to relay the medical powder as described above. Supply to the passage 44 is realized more stably.

  In the injection device 10 having the shape as described above, the direction of the injection nozzle portion 16 can be changed as shown in FIGS. That is, in the initial state shown in FIG. 1 and the like, the injection nozzle portion 16 extends toward the tip end side in the axial direction. For example, the support protrusions 56 and 56 move downward in the guide grooves 48 and 48, thereby supporting protrusions. The support member 52 provided with 56, 56 also moves downward. At this time, since the proximal end side of the flexible tube 58 connected to the support member 52 is fixed to the relay passage 44, only the distal end of the flexible tube 58 is bent and deformed downward. Along with this, the front end side of the support member 52 faces downward, and the direction of the injection nozzle portion 16 connected to the front end side of the support member 52 is changed downward. That is, in this embodiment, the injection direction setting mechanism that changes the direction of the injection nozzle portion 16 that is the tip portion of the injection passage 28 includes the support protrusions 56 and 56, the guide grooves 48 and 48, and the flexible tube 58. It is configured. By making the length dimension of the flexible tube 58 substantially equal to the radius of curvature of the movement allowing portion 46, the flexible tube 58 can have a substantially constant curvature even when the direction of the injection nozzle portion 16 is changed. It can be bent and the medical powder can be smoothly ejected. Further, the change in the direction of the injection nozzle portion 16 can be realized, for example, by grasping the tubular body 26 and pushing it downward.

  Further, the guide grooves 48 and 48 are locally provided with portions slightly narrower than the support protrusions 56 and 56, and the positions beyond the narrow width portions position the support protrusions 56 and 56. It is set as the positioning part 72 for doing. That is, the support protrusions 56, 56 that have moved through the guide grooves 48, 48 are positioned at the positioning portion 72, so that the movement of the support protrusions 56, 56 is restricted, and the direction of the injection nozzle section 16 relative to the apparatus main body 18 can be determined. It is said that. The number of positioning parts 72 is not particularly limited, but if a large number of positioning parts 72 are provided, the direction of the injection nozzle part 16 relative to the apparatus main body 18 can be determined at an arbitrary angle corresponding to each positioning part 72. Further, the guide grooves 48 and 48 are locally provided with portions slightly narrower than the support protrusions 56 and 56, so that the positioning portion is caused by the frictional force between the guide grooves 48 and 48 and the support protrusions 56 and 56. The direction of the injection nozzle unit 16 relative to the apparatus main body 18 can be determined at an arbitrary angle, not limited to the position of 72. That is, in the present embodiment, the positioning mechanism 72 is configured to set the direction of the injection nozzle unit 16 so as to be releasable in a plurality of different directions by the positioning portion 72 and the narrow portion as described above.

  And in the injection apparatus 10 of this embodiment, the palm part 22 and the operation part 24 of the pressing part 14 are overlapped while the grip part 12 is gripped while the hook part 22 is hooked with fingers. Then, the medical powder contained in the powder container 62 is ejected from the distal end opening 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. Can do. That is, as shown in FIG. 7, when the pressing portion 14 is pushed into the distal end side, the opening / closing valve 36 held in the closed state is opened and the entire length of the injection passage 28 is brought into a communication state. Pressure gas is supplied through the gas flow path. On the other hand, since the pressure gas is supplied to the vibration mechanism 66 through the branch passage 70 branched from the fixed nozzle 38, the eccentric rotating body 68 rotates and the excitation force is continuously generated. The medical powder in the powder container 60 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 of the injection nozzle portion 16. In FIG. 7, the medical powder is injected by pressing the pressing portion 14 in a state where the direction of the injection nozzle portion 16 is directed downward, but the direction of the injection nozzle portion 16 is axially changed as shown in FIG. 1. Alternatively, the pressing part 14 may be pressed in a state where the medical powder is directed to spray the medical powder.

  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 urging force of the spring 42, so that the open / close valve 36 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.

  In the present embodiment, the rectifying plate 74 is assembled to the distal end opening of the tubular body 26 in the accommodated state. The shape of the rectifying plate 74 is not particularly limited, but is a torsion plate shape in the present embodiment. The jet fluid is guided along the torsional surface of the current plate 74 and jetted to the outside while being swirled in a spiral shape, so that the medical powder to be sprayed is centrifuged based on a spiral rotation action. The force is exerted so that the medical powder is diffused and sprayed uniformly over a wider range.

  In the in-vivo injection device 10 of the medical powder of the present embodiment having the shape as described above, an injection direction setting mechanism for changing the direction of the injection nozzle portion 16 is provided, so that it is stable regardless of the injection direction. This makes it possible to perform the injection operation of the medical powder.

  In particular, in this embodiment, when the direction of the injection nozzle portion 16 is changed, the flexible tube 58 connected to the proximal end side of the injection nozzle portion 16 is also bent and deformed, so that the injection passage 28 is gently curved. Thus, the medical powder can be smoothly injected. Further, when changing the direction of the injection nozzle unit 16, the change within a predetermined angle is allowed (approximately 90 degrees in the present embodiment), and therefore the injection nozzle unit 16 is excessively bent with respect to the apparatus main body 18. Therefore, the risk of difficulty in ejecting medical powder is reduced. Furthermore, since it is possible to adjust the angle of the injection nozzle unit 16 in a swinging manner along the vertical plane, the injection nozzle unit 16 is also prevented from being accidentally displaced laterally.

  Moreover, in this embodiment, since the positioning mechanism which sets the direction of the injection | spray nozzle part 16 is provided, the direction of the injection | spray nozzle part 16 can be adjusted suitably, and medical powder is a desired human body. It can be stably sprayed to the location.

  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 the present embodiment, the tubular body 26 is fixed to the apparatus main body 18 by a luer lock type and can be removed, so that the tubular body can be easily replaced, for example, 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 easily can be solved.

  Moreover, in this embodiment, since the holding part 12 can be hold | gripped from any direction, the injection operation of medical powder can be easily performed irrespective of an injection direction. In particular, by operating the operation unit 24 with the palm of the hand instead of the fingers, the ejection operation can be performed regardless of the orientation of the ejection device 10, and the operability can be further improved. Moreover, even when holding the torso 20 between the index finger and the middle finger like a general syringe and operating the operation unit 24 with the thumb, the injection operation can be performed regardless of the direction of the injection device 10. The property can be further improved. Furthermore, since the pressing member 14 is rotatable in the circumferential direction, the circumferential position of the connection port 30 can be adjusted, and an injection operation can be performed regardless of the orientation of the connection port 30. The operability of 10 can be further improved.

  Next, FIGS. 8 to 11 show an in-vivo injection device 76 for medical powder as a second embodiment of the present invention. The injection device 76 has a substantially pistol shape as a whole. By operating the trigger-like pressing portion 80 while holding the holding portion 78, the medical powder is pressed from the tip of the injection nozzle portion 16. It comes to inject with gas. In the following description, members or parts that are substantially the same as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment in the drawings, and detailed description thereof is omitted.

  That is, in the present embodiment, the proximal end side portion of the injection passage 82 is configured by the tube 84, and one end portion is open to the outside, and the other end portion is inside the upper end of the grip portion 78. It is connected to the valve housing 86 located. On the other hand, the tip side portion of the injection passage 82 is constituted by the injection nozzle portion 16 extending forward from the body portion 20.

  The operating means 32 provided in the intermediate portion of the injection passage 82 includes a pressing portion 80 and an opening / closing valve 36, and transmits an external operating force applied to the pressing portion 80 to the opening / closing valve 36. As a result, the opening and closing of the injection passage 82 is switched. In the present embodiment, the movable nozzle 88 integrally formed with the pressing portion 80 is inserted into the sealing valve disposed in the opening of the valve housing 86 by pressing the pressing portion 80 toward the proximal end side. It is supposed to be. On the other hand, by releasing the pushing force to the pressing portion 80, the movable nozzle 88 is pulled out from the sealing valve, and the inside of the valve housing 86 is sealed and shut off.

  Note that a spring 42 as a biasing means is compressed on the outer peripheral side of the movable nozzle 88 between the axial direction of the distal end portion of the movable nozzle 88 and the cylindrical member 40 provided on the distal end side of the valve housing 86. The movable nozzle 88 and the pressing portion 80 are always urged toward the distal end side.

  Thus, in the initial state, the pressing portion 80 is elastically positioned to the moving end on the distal end side, the movable nozzle 88 and the sealing valve are separated from each other by a predetermined distance, and the opening / closing valve 36 is held in the shut-off state. It has become so. On the other hand, by pushing the pressing portion 80 against the urging force toward the proximal end side, the movable nozzle 88 enters the sealing valve and the injection passage 82 is brought into a communication state. Further, by releasing the pushing force on the pressing portion 80, the pressing portion 80 automatically returns to the initial position.

  Furthermore, also in this embodiment, the front end of the trunk portion 20 is provided with a movement allowance portion 46 having a substantially sector shape with a central angle of 90 degrees when viewed from the front. In the vicinity of the center of curvature of the sector-shaped movement-permissible portion 46, through holes 90, 90 are formed on both sides in the width direction (left and right direction in FIG. 10), and the base of the through grooves 90, 90 is formed. On the end side, guide grooves 92 and 92 extending in a substantially arc shape are formed so as to penetrate therethrough.

  On the other hand, a swing member 93 is fitted on the tip of the movement allowing portion 46. That is, a pair of support plate members 94 are provided on both outer sides in the width direction at the tip of the movement allowing portion 46. The support plate member 94 has a substantially rectangular front end side and a substantially circular base end side in a front view. And from the center part of the base end side made into substantially circle shape of the support plate members 94 and 94, while the center protrusion 96,96 protrudes toward the width direction inward, the outer peripheral part of base end side From the side, support protrusions 98 and 98 are formed so as to protrude inward in the width direction. The central protrusions 96 and 96 and the support protrusions 98 and 98 are fitted in the through holes 90 and 90 and the guide grooves 92 and 92 of the movement allowing portion 46, respectively. The central protrusions 96 and 96 are inserted into the through holes 90 and 90. The support protrusions 98 and 98 are movable in the guide grooves 92 and 92.

  Further, the distal ends of the support plate members 94 and 94 are connected by the distal end plate portion 100. As a result, the swing member 93 has a substantially U-shape opening to the proximal end side in plan view, the distal end plate portion 100 is located on the distal end side from the movement allowing portion 46, and the support plate The base end portions of the members 94 and 94 are fitted into the movement allowing portion 46 from the outside. Further, an outer tube portion 54 having an internal thread formed on the inner peripheral side protrudes from the distal end surface of the distal end plate portion 100 and is fixed to the fixing member 50 having an external thread formed on the outer peripheral side in a luer lock type. It has come to be. A pipe line 102 is formed at the center of the distal end plate portion 100 so as to protrude toward the base end side, and the distal end of the relay path 44 and the pipe line 102 are connected by a flexible tube 58. Thereby, in this embodiment, the gas flow path to which the pressure gas is supplied from the external pressure source includes the tube 84, the movable nozzle 88, the relay passage 44, the flexible tube 58, and the tubular body 26. Yes.

  Also in the injection device 76 of the present embodiment configured as described above, the direction of the injection nozzle portion 16 can be changed. That is, as shown in FIG. 12, the swinging member 93 rotates around the central protrusions 96 and 96, and the support protrusions 98 and 98 move in the guide grooves 92 and 92, thereby swinging. The direction of the member 93 is changed, and the direction of the injection nozzle portion 16 connected to the tip end side of the swinging member 93 can be changed. Therefore, in this embodiment, the ejection direction setting mechanism includes the central projections 96 and 96 and the support projections 98 and 98 of the swinging member 93, the through holes 90 and 90, the guide grooves 92 and 92, the flexible tube 58, and the like. It is configured.

  In the present embodiment, a positioning portion 72 that determines the positions of the support protrusions 98 and 98 is provided in the guide groove 92. The number of positioning portions 72 is not particularly limited, but if a large number of positioning portions 72 are provided, the direction of the injection nozzle portion 16 relative to the apparatus main body 18 can be determined at a more various arbitrary angle. Further, the guide grooves 92, 92 and the support protrusions 98, 98 are provided with a portion slightly narrower than the support protrusions 98, 98 over a predetermined length or the entire length of the guide grooves 92, 92. The direction of the injection nozzle 16 relative to the apparatus main body 18 can be determined at an arbitrary angle by the frictional force regardless of the presence or absence of the positioning portion 72.

  Thus, as shown in FIG. 12, by changing the angle of the injection nozzle portion 16 and holding the grip portion 78 and pushing the pressing portion 80 toward the base end side with fingers, the injection passage 82 is formed. In communication, the medical powder is injected together with the pressure gas. Thus, also in the injection device 76 of the present embodiment, since the direction of the injection nozzle portion 16 can be changed, the same effect as in the first embodiment can be exhibited. Also in the present embodiment, since the powder supply mechanism 34 and the vibration mechanism 66 are provided, the injection of medical powder can be efficiently realized as in the first embodiment.

  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 above-described embodiment, the injection nozzle unit 16 has a single tube structure of the tubular body 26, and the injection direction setting mechanism is configured by changing the direction of the tubular body 26 to a swinging shape. It is not limited to an aspect. That is, for example, by providing a plurality of attachment holes for the tubular body at the distal end portion of the apparatus body, selecting one of the attachment holes of the tubular body, and detachably connecting the tubular body to the attachment opening, An injection direction setting mechanism that changes the direction of the nozzle portion may be employed. At that time, the injection passage on the upstream side of the attachment port of the tubular body may be provided with a switching mechanism so as to be connected to the selected attachment port, or connected to all the attachment ports and selected. You may close attachment ports other than an attachment port.

  Further, in the embodiment, the guide grooves 48, 48 are provided with narrow portions, and a positioning mechanism for setting the direction of the injection nozzle portion 16 is provided using the narrow portions. The embodiment is not limited to such an embodiment. For example, after setting the direction of the injection nozzle portion, a stopper is inserted into the through window of the movement allowing portion, or in the second embodiment, the swinging of the swinging member is fixed from the outside. Alternatively, the direction of the injection nozzle portion may be set.

  Furthermore, in the above-described embodiment, the powder flow path and the gas flow path are provided separately, but it is not necessary to introduce a pressure gas containing medical powder from the outside, and the tip of the injection nozzle portion. You may make it inject from.

  Furthermore, in the above-described embodiment, the direction of the injection nozzle unit 16 can be changed in a swinging manner along a vertical surface (a surface extending in the vertical direction). For example, the horizontal direction (the horizontal direction in FIG. 3) The direction may be changeable along the surface extending in the direction. Further, for example, the injection nozzle portion inserted therethrough may be changed in both the vertical plane and the horizontal plane by a guide hole provided in a cross shape in front view. Furthermore, by supporting the base end portion of the injection nozzle portion with a ball joint or the like, the direction can be changed in a swinging manner in a 360 ° direction like a joystick.

  Moreover, in the said embodiment, although the tubular body 26 was being fixed to the support member 52 of the apparatus main body 18 by the luer lock type, it is not limited to this aspect. That is, the tubular body and the support member may be fixed by press fitting or unevenness. In addition, by making the tubular body detachable in this way, it is possible to easily cope with problems such as clogging of medical powder in the tubular body, but the tubular body is not removable. May be. In that case, it is preferable to provide a mechanism for removing clogging of the medical powder.

  Further, as the interlocking mechanism that opens and closes the valve body in conjunction with the injection and stop of the medical powder by the operation means 32, an electrical interlocking mechanism can be adopted in addition to the mechanical interlocking mechanism as illustrated. . That is, the operation of the pressing portion 14 is detected by an electrical contact or a sensor, and a pressure valve that switches supply and stop of the pressure gas and a valve body that covers the tip opening of the inner cylinder member are respectively connected by an actuator or the like. A mechanism for opening and closing can also be employed.

  In the present invention, the vibration mechanism 66 is not essential. Even when the vibration mechanism is employed, it is not necessary to link the vibration of the injection device by the vibration mechanism and the injection of the medical powder, and the vibration mechanism may be configured using, for example, an electric motor other than the pressure gas. .

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

10, 76: In-vivo injection device for medical powder, 12, 78: Grasping part, 14: Pressing part, 16: Injection nozzle part, 18: Apparatus body (main part), 24: Operation part, 28, 82: Injection Passage, 32: operation means, 58: flexible tube (flexible passage portion), 60: container holder, 62: powder container

Claims (9)

While the injection passage for injecting the medical powder together with the pressure gas is provided, the medical part can be operated by operating the body part having the grip part that can be held by the hand with the hand having the grip part. In-body injection device for medical powder provided with operation means capable of switching between injection and stop of powder for medical use,
An in-vivo injection device for medical powder, characterized in that an injection direction setting mechanism is provided for changing the direction of an injection nozzle portion at a tip portion of the injection passage.   The injection direction setting mechanism is configured to include a flexible passage portion connected to a base end side of the injection nozzle portion in the injection passage, and the injection nozzle is configured by bending and deforming the flexible passage portion. The medical powder injection device according to claim 1, wherein the direction of the part is changed.   The in-vivo injection of medical powder according to claim 1 or 2, wherein a positioning mechanism is provided for positioning the injection nozzle portion with respect to the main body portion so that the direction of the injection nozzle portion can be released. apparatus.   In the main body portion, a container holder to which a powder container containing the medical powder is detachably attached is provided, and a powder flow path communicating with the powder container attached to the container holder, The in-vivo injection device for medical powder according to any one of claims 1 to 3, wherein the injection passage is configured to include a gas flow path through which pressurized gas is supplied from the outside.   The direction of the injection nozzle part changed in the injection direction setting mechanism can be changed in a swinging manner within a predetermined angle range along a plane including the central axis of the powder container attached to the container holder. The medical powder internal injection apparatus according to any one of claims 1 to 4.   The medical powder in-vivo injection device according to any one of claims 1 to 5, wherein the injection passage has a split structure in which an injection nozzle portion at a distal end portion is detachable.   The medical powder in-vivo injection device according to any one of claims 1 to 6, wherein the gripping portion of the main body portion has a substantially rotationally symmetric shape in which a gripping direction by a hand is not specified.   The medical powder in-vivo injection device according to claim 7, wherein an operation part by hand in the operation means is provided on an outer end face of the grip part.   The medical powder in-vivo injection device according to claim 7 or 8, further comprising a pressing portion that is positioned on a proximal end side of the gripping portion and is rotatable in a circumferential direction.

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