JP6478270B2 - Liquid dosing device - Google Patents

Description

  The present invention relates to a solution administration device for administering a solution by puncturing a bundled needle configured by bundling a plurality of needles into a target site.

  Conventionally, as such a liquid medicine administration device, an outer cylinder part, an inner cylinder part movable within the outer cylinder part, and a bundle needle fixed to the front end part of the inner cylinder part are provided, and a drug such as a gene or a test drug There has been known a drug administration device for administering to the affected tissue (for example, see Patent Document 1). In the drug administration treatment device of Patent Document 1, the inner tube portion can move between a position where the bundle needle protrudes forward of the outer tube portion and a position where the bundle needle is housed inside the outer tube portion. Configured.

  When a drug is administered to the affected tissue in the body cavity by this drug administration device, the drug administration device is passed from the front end side of the endoscope through the endoscope channel with the bundling needle stored in the outer cylinder. It is introduced into the body cavity and positioned so that the front end of the drug administration treatment device faces the affected tissue. Then, the bundling needle protrudes from the front end of the outer cylinder portion and punctures the affected tissue. Thereafter, the medicine is supplied from the syringe or the like to the bundle needle through the inner cylinder portion. The supplied medicine is injected into the affected tissue through the bundle needle.

  Moreover, in another aspect of the drug administration treatment device in Patent Document 1, instead of supplying a drug from a syringe or the like, the drug is applied to the bundle needle and applied to the bundle needle by capillary action or surface tension. Thereafter, the drug is administered to the affected tissue by similarly puncturing the affected tissue with the bundling needle through the endoscope.

Japanese Patent Laid-Open No. 8-150215

  However, according to the conventional drug administration treatment tool, an amount of drug according to the operation amount of a syringe or the like is supplied. Therefore, when the operation amount is large, an excessive amount of drug is administered to the affected tissue. There is a risk. Moreover, the medicine supplied into the inner cylinder part is transmitted from the front end of the inner cylinder part as it is to the bundle needle and flows out to the affected tissue. This may also cause an excessive amount of drug to be administered to the affected tissue.

  Further, according to another aspect of the drug administration treatment tool, since the drug given to the bundling needle is administered to the affected tissue, it is possible to avoid to some extent that an excessive amount of drug is administered to the affected tissue. it can. However, when the drug is administered to several parts of the affected tissue, it is complicated because the drug administration treatment tool must be repeatedly attached to and detached from the endoscope each time.

  An object of the present invention is to provide a liquid medicine administration device that can easily administer an appropriate amount of liquid medicine to a target site in view of the problems of the prior art.

  The liquid medicine administration device of the present invention includes an outer cylinder portion having an open front end, a liquid agent application portion for applying a liquid agent to a target site located at the front end portion of the outer cylinder portion, and an inner side of the outer cylinder portion An inner cylinder part that forms a filling gap that is disposed in the outer cylinder part and is filled with the liquid agent, the inner cylinder part having a connection hole that connects the inside and the filling gap, and the liquid agent A moving part that moves the applying part between a protruding position that protrudes from the front end of the outer cylinder part and a storage position that is stored inside the outer cylinder part, and a liquid agent from the filling gap to the liquid agent applying part And a first opening / closing part that restricts the flow of the liquid agent when the liquid agent application part is located at the protruding position and allows the liquid agent application part when the liquid agent application part is located at the storage position.

  In the present invention, when a liquid agent is administered to a target site, first, the liquid agent application part is moved to the protruding position. Thereby, the distribution of the liquid agent from the gap for filling to the liquid agent applying unit is restricted by the first opening / closing unit. In this state, the liquid agent is supplied to the inner cylinder portion from the rear end side. The supplied liquid agent is filled into the filling gap through the connection hole.

  Next, the liquid agent application unit is moved to the storage position. As a result, the first opening / closing part allows the liquid agent to flow from the filling gap to the liquid agent applying part, and the liquid agent in the filling gap flows into and permeates the liquid agent applying part.

  Next, the liquid agent application part is moved to the protruding position, and the liquid agent is applied from the liquid agent application part to the target site. At this time, since the flow of the liquid agent from the filling gap to the liquid agent applying part is restricted by the first opening / closing part, the application of the liquid agent is performed without leakage of excess liquid agent from the filling gap to the liquid agent applying part. Done.

  Therefore, according to the present invention, the minimum necessary liquid agent can be easily administered to the target site. In addition, when a dye solution is used as a liquid agent and a bundle needle is used as a liquid agent application part and marking (marking treatment) is performed on the target site via an endoscope, the dye solution leaks around the target site It is possible to prevent difficulty in securing a visual field by an endoscope.

  In addition, when the liquid agent is administered through an endoscope, the liquid agent can be administered to a plurality of target sites or a plurality of liquid agents can be administered while the liquid agent administration device is attached to the endoscope. That is, with the liquid medicine administration device attached to the endoscope, filling the liquid medicine into the filling gap described above, moving the liquid medicine application section to the storage position, moving the liquid medicine application section to the protruding position, and moving to the target site What is necessary is just to repeat procedures, such as administration of a liquid agent, arbitrary times.

  In the present invention, there may be provided a second opening / closing part that opens the connection hole when the liquid agent application part is located at the protruding position and closes the connection hole when the liquid agent application part is located at the storage position. .

  In this case, when the liquid agent applying part is moved to the storage position and the liquid agent is allowed to flow from the filling gap to the liquid agent applying part, and the liquid agent flows and penetrates into the liquid agent applying part, The connecting hole of the tube portion is closed. For this reason, there is no possibility that the liquid agent in the filling gap is excessively supplied to the liquid agent application unit.

  Therefore, it is possible to easily administer the minimum necessary liquid agent to the target site more reliably. Further, when marking (inking treatment) is performed as described above, it is possible to more reliably prevent the dye solution from leaking around the target site and making it difficult to secure a visual field by the endoscope.

  In the present invention, the liquid agent applying portion is provided at a front end portion of the inner cylinder portion, the moving portion is constituted by the inner cylinder portion, and the first opening / closing portion has the liquid agent applying portion at the protruding position. A first opening / closing member that restricts the flow of the liquid agent to the liquid agent applying portion in close contact with the front end portion of the inner cylinder portion when positioned and releases the restriction when the liquid agent applying portion moves to the storage position It may be constituted by.

  According to this, since the inner cylinder part is used as the moving part, a mechanism for moving the liquid agent application part between the protruding position and the storage position only by adding an operation part for inserting and removing the inner cylinder part from the outer cylinder part. Can be configured. Further, the liquid agent application part can be moved between the protruding position and the storage position only by operating the operation part. Therefore, the configuration and operation of the liquid medicine administration device can be simplified. In addition, a configuration other than the distal end portion of the conventional puncture needle having such an operation unit can be used to easily configure the liquid medicine administration device.

  In the present invention, the second opening / closing part opens the connection hole when the liquid agent application part is located at the protruding position, and closes the connection hole when the liquid agent application part is located at the storage position. You may be comprised by the 2nd opening-and-closing member located in a position. According to this, a 2nd opening-and-closing part can be easily comprised only by providing a 2nd opening-and-closing member in the position which can open and close | close a connection hole.

  In the present invention, the first opening / closing portion and the second opening / closing portion constitute a slide portion that is connected by a connecting member and can slide integrally in the front-rear direction between the outer cylinder portion and the inner cylinder portion. The outer tube portion includes a movement blocking portion that blocks the liquid agent application portion from moving forward relative to the protruding position, and the first opening / closing portion is a cylinder that is supported through the liquid agent application portion on the inside thereof. When the liquid agent application part is located at the protruding position, the liquid agent is interposed between the front end part of the inner cylinder part and the movement prevention part of the outer cylinder part to distribute the liquid agent. The inner cylinder part is configured to push the slide part after the connection hole is closed by the second opening / closing part when the liquid agent application part moves from the protruding position to the storage position. By moving to a position corresponding to the storage position, It may comprise a pusher member to continue the support of the agent deposition unit according to one opening portion.

  According to this, even when the liquid agent application part is located at any position between the protruding position and the storage position, the liquid agent application part can be supported by the first opening / closing part.

  In this case, the second opening / closing part may be configured by a member that defines a rear end of the filling gap. According to this, after the liquid agent applying part is positioned at the protruding position and the liquid agent is filled in the filling gap, when the liquid agent applying part is moved from the protruding position to the storage position, first, the pushing member of the inner cylinder part moves the slide part. The inner cylinder part moves away from the first opening / closing part by the movement distance L1 of the inner cylinder until the pushing starts.

  During this time, the rear end of the filling gap is defined and maintained by the second opening / closing portion, so that the liquid agent in the filling gap in an amount corresponding to the distance L1 flows into the liquid application portion. After the inner cylinder part has moved away from the first opening / closing part by the moving distance L1, the feeding member of the inner cylinder part pushes the slide part, so that the liquid agent applying part is maintained while the positional relationship between the inner cylinder part and the slide part is maintained. The storage position is reached. Therefore, by moving the liquid agent application part from the protruding position to the storage position, a certain amount of liquid agent corresponding to the distance L1 can be supplied to the liquid agent application part.

  In the present invention, the liquid agent applying member may be a bundling needle configured by bundling a plurality of needles. According to this, when the liquid agent application part is moved from the protruding position to the storage position and the liquid agent is circulated from the filling gap to the liquid agent application part, only a part of the rear end side of the bundle needle is more than the second opening / closing member. Even when the liquid agent is located on the rear end side and is in contact with the filling gap, the liquid agent can be appropriately supplied to the front end side of the bundle needle by the capillary phenomenon.

It is a front view of the liquid medicine administration device concerning one embodiment of the present invention. (A) is sectional drawing of the front end vicinity in the state in which the bundle needle | hook of a liquid medicine administration device is located in a protrusion position, (b) is sectional drawing in a 90-degree cross section different from (a). (A) is a front view of the front-end obstruction | occlusion member to which the bundle needle of the liquid medicine administration device was fixed, (b) is the side view. (A) is a front view of the pushing member of a liquid medicine administration device, and (b) is the side view. (A) is a front view of the slide part of a liquid agent administration apparatus, (b) is the right view, (c) is a left view. FIG. 2 (a) shows an enlarged view of the side hole vicinity portion A in FIG. 2 (a), in which the dye solution flows from the side hole of the inner cylinder portion into the rear end portion of the filling gap and is filled. It is explanatory drawing. The state in which the dye liquid flowing into the rear end portion of the filling gap is filled into the front end side of the filling gap through the flow passage is enlarged in the vicinity B of the rear end portion of the filling gap in FIG. It is explanatory drawing shown. It is sectional drawing which shows the state with which the pigment | dye liquid was filled in the gap for filling in the state of Fig.2 (a). It is sectional drawing which shows a state when a bundle needle | hook is moved to the accommodation position from the state of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, a liquid administration device 1 according to an embodiment is provided with a liquid injection tube 2 inserted into an endoscope (not shown) from the front end side, a front end of the liquid injection tube 2, and a plurality of needles. Are provided with a bundle needle 3 as a liquid agent applying section configured by bundling and a hand operation section 4 for operating the bundle needle 3 via the liquid dispensing tube 2.

  The hand operation unit 4 includes an operation unit body 5 on the front end side and a terminal unit 6 on the rear end side. The operation portion main body 5 and the terminal portion 6 are each provided with a tubular space penetrating in the length direction. The operation portion main body 5 and the terminal portion 6 are configured such that the front end side of the terminal portion 6 can be inserted into and removed from the rear end side of the tubular space of the operation portion main body 5. A connection terminal 7 for connecting a syringe or the like to the tubular space of the terminal portion 6 is provided at the rear end portion of the terminal portion 6.

  As shown in FIG. 2, the liquid dispensing tube 2 includes an outer tube 8 as an outer tube portion on the outside, and an inner tube 9 that is moved in the front-rear direction on the inner side. The rear end portion of the outer tube 8 is fixed to the front end portion of the operation portion main body 5 (see FIG. 1) and connected to the tubular space. The outer tube 8 and the inner tube 9 are formed using, for example, a fluororesin having excellent slidability.

  In the vicinity of the rear end portion of the outer tube 8, a vent hole 8 a penetrating the side wall of the outer tube 8 is provided (see FIG. 1). The vent hole 8 a allows air to enter and exit between the outer tube 8 and the outer tube 8 and the outer tube 8. Thereby, the operation which makes the bundling needle 3 protrude from the front-end part of the outer cylinder tube 8, and accommodates in this front-end part can be performed smoothly.

  The front end of the outer tube 8 is open, and a front end small diameter portion 10 having an inner diameter smaller than the rear side is provided at the front end portion. The front end small-diameter portion 10 functions as a movement preventing portion that prevents a later-described first opening / closing member from moving forward from a position corresponding to the protruding position. The front end of the inner tube 9 is closed by the front end closing member 12.

  As shown in FIG. 3, the above-described bundle needle 3 is fixed toward the front at the front end portion of the front end closing member 12. The rear end portion of the inner tube 9 is fixed to the front end portion of the terminal portion 6 (see FIG. 1) through the tubular space of the operation portion main body 5 and connected to the tubular space of the terminal portion 6.

  Therefore, by inserting and removing the terminal portion 6 with respect to the operation portion main body 5, the bundle needle 3 is projected through the inner tube 9 to the front of the outer tube 8 as shown in FIG. 9, it can be moved between the storage positions stored inside the outer tube 8. That is, the inner tube 9 functions as a moving unit that moves the bundle needle 3 between the protruding position and the storage position.

  As shown in FIG. 3, the bundling needle 3 is configured by, for example, bringing seven needles into close contact with each other and fixing the needle to the front end of the front end closing member 12. You may fix between the mutually adjacent needle | hooks with an adhesive agent. The front end closing member 12 includes a columnar portion 13 having the same outer diameter as the outer diameter of the inner tube 9 and a rod-shaped portion 14 extending rearward from the rear end surface of the columnar portion 13. The front end closing member 12 and the bundle needle 3 are formed using a metal such as stainless steel.

  As shown in FIG. 2, the front end portion of the inner tube 9 is closed by inserting the rod-like portion 14 into the inner tube 9 until the rear end surface of the cylindrical portion 13 is in close contact with the front end surface of the inner tube 9. Is called. The inner cylinder tube 9 and the front end closing member 12 constitute an inner cylinder part.

  A side hole 15 as a connection hole penetrating from the inner side to the outer side of the inner tube 9 is provided at a predetermined location near the front end closing member 12 of the inner tube 9. The connection terminal 7 (see FIG. 1) of the terminal portion 6 communicates with the side hole 15 through the tubular space of the terminal portion 6 and the inner tube 9.

  A feeding member 16 having a partial cylindrical shape as shown in FIG. 4 is provided on the outer periphery on the front end side of the side tube 15 of the inner tube 9. The pushing member 16 has a function of pushing a cylindrical rear end member 20 of a slide portion 17 described later to a position corresponding to the storage position when the bundle needle 3 moves from the protruding position to the storage position. The pushing member 16 is formed using a metal such as stainless steel.

  As shown in FIG. 2, a slide portion 17 slidable with the outer tube 8, the inner tube 9, and the front end closing member 12 (inner tube portion) is disposed. The slide part 17 keeps the distance between the outer tube 8 and the inner tube 9 constant. As a result, a filling gap 18 is formed between the outer tube 8, the inner tube 9, and the front end closing member 12 (inner tube portion) for circulating the liquid agent. The slide portion 17 is formed using a metal such as stainless steel.

  As shown in FIG. 5, the slide portion 17 is longer than the front end opening / closing member 19 and the cylindrical front end opening / closing member 19 having an inner diameter that allows the front end of the columnar portion 13 of the front end closing member 12 to be detachably fitted. A cylindrical rear end member 20, and a connecting portion 21 that connects and integrates the front end opening / closing member 19 and the cylindrical rear end member 20 are provided.

  The front end opening / closing member 19 restricts the flow of the liquid agent from the filling gap 18 to the bundling needle 3 when the bundling needle 3 is positioned at the above-described protruding position, and allows the first end when the bundling needle 3 is positioned at the above-described storage position. Configure the opening and closing part. That is, the front end opening / closing member 19 is in close contact with the front end portion of the cylindrical portion 13 of the front end closing member 12 when the bundle needle 3 is located at the protruding position, and restricts the flow of the liquid agent to the bundle needle 3. It functions as a first opening / closing member that releases the restriction when moving to the storage position.

  The cylindrical rear end member 20 constitutes a second opening / closing portion that opens the side hole 15 when the bundle needle 3 is located at the protruding position and closes the side hole 15 when the bundle needle 3 is located at the storage position. That is, the cylindrical rear end member 20 opens the side hole 15 when the bundle needle 3 is located at the protruding position, and is located at a position where the side hole 15 is closed when the bundle needle 3 is located at the storage position. 2 Functions as an opening / closing member.

  The pushing member 16 of the inner tube 9 has a cylindrical rear end member 20 of the slide portion 17 after the side hole 15 is closed by the cylindrical rear end member 20 when the bundle needle 3 moves from the protruding position to the storage position. And has a function of moving to a position corresponding to the storage position. Thereby, the support of the bundle needle 3 by the below-mentioned front end opening and closing member 19 is continued.

  Of the gaps between the outer tube 8 and the inner tube 9 and the front end closing member 12 (inner tube portion), the portion existing between the front end opening / closing member 19 and the cylindrical rear end member 20 is a filling gap. 18 is used.

  On the front end side of the front end opening / closing member 19, there is provided an annular small diameter portion 19a having a smaller inner diameter than the rear end side and through which the binding needle 3 passes on the radially inner side. The rear end side of the front end opening / closing member 19 with respect to the annular small diameter portion 19a has an inner diameter that allows the front end portion of the cylindrical portion 13 of the front end closing member 12 to be detachably fitted. The annular small diameter portion 19a supports the bundle needle 3 in the radial direction so that it can slide in the length direction.

  As shown in FIGS. 2 and 8, when the bundling needle 3 is located at the protruding position, the cylindrical portion 13 of the front end closing member 12 is fitted to the front end opening / closing member 19, and the annular small-diameter portion 19a of the front end opening / closing member 19 is the cylindrical portion. 13 is pressed against the front end small diameter portion 10 of the outer tube 8. Accordingly, the front end opening / closing member 19 closes the front end of the filling gap 18 in cooperation with the columnar portion 13 and the front end small diameter portion 10.

  As shown in FIG. 9, when the bundling needle 3 is positioned at the storage position, the front end opening / closing member 19 is separated from the front end small diameter portion 10 and the front end closing member 12. As a result, the filling gap 18 communicates with the proximal end side of the bundle needle 3.

  The cylindrical rear end member 20 defines the rear end of the filling gap 18 and opens the side hole 15 with respect to the filling gap 18 when the binding needle 3 is located at the protruding position as shown in FIG. Further, when the bundle needle 3 moves to the storage position shown in FIG. 9, the cylindrical rear end member 20 is positioned at a position corresponding to the storage position by being pushed by the pushing member 16 after closing the side hole 15. .

  As shown in FIG. 2B, the cylindrical rear end member 20 is provided with a slit 22 extending from the front end to the rear end. The slit 22 absorbs a dimensional error of the slide portion 17 with respect to the inner tube 9, facilitates its assembly, and brings the tubular rear end member 20 into contact with the outer periphery of the inner tube 9 with an appropriate elastic force. The contact by the appropriate elastic force makes the sliding of the slide portion 17 with respect to the inner tube 9 moderately smooth, and the side hole 15 is appropriately closed by the cylindrical rear end member 20.

  As shown in FIG. 2B, the connecting portion 21 extends between the one end edge and the other end edge in the circumferential direction of the pushing member 16 and extends in the front-rear direction, and the front end opening / closing member 19 and the cylindrical rear end member 20 is connected. Between the connection part 21 and this one end edge and other end edge, the flow path 23 which can distribute | circulate a liquid agent is formed. The filling gap 18 extends over the front and rear of the pushing member 16 via the flow passage 23.

  Next, an example of a method for using the solution administration device 1 will be described. In this example, a dye solution is used as a liquid agent, and an inking treatment is performed through a endoscope to give a mark to a target site such as the small intestine. That is, first, the liquid medicine administration device 1 is taken out from its packaging while paying sufficient attention to contamination, and it is confirmed that the bundling needle 3 is not bent or bent, and that the liquid dispensing tube 2 is not crushed or markedly bent.

  Next, a syringe or the like containing the dye solution is connected to the connection terminal 7 of the liquid medicine administration device 1. And the terminal part 6 of the hand operation part 4 is pushed, and the bundle needle 3 is moved to a protrusion position. Thereby, as shown in FIG. 2, the tip of the liquid administration device 1 is such that the bundle needle 3 protrudes from the tip of the outer tube 8, and the side hole 15 of the inner tube 9 is in contact with the filling gap 18. It will be in an open state.

  After confirming the protrusion of the bundling needle 3, the dye solution is injected into the inner tube 9 while gradually pushing a pusher (plunger) such as a syringe. This injection is performed until the dye solution flows into the filling gap 18 through the side holes 15 and is filled into the filling gap 18. At this time, since the air for the injected dye solution is released from the vent hole 8a (see FIG. 1) of the outer tube 8, the dye solution is smoothly injected.

  At that time, as shown in FIG. 6, the dye solution 24 reaching the front end of the inner tube 9 flows out from the side hole 15 of the inner tube 9 to the rear end of the filling gap 18. The dye solution 24 that has flowed out further flows into the front side of the pushing member 16 in the filling gap 18 through the flow passage 23 between the connecting portion 21 of the sliding portion 17 and the pushing member 16 as shown in FIG. To do.

  Thereby, finally, as shown in FIG. 8, the dye liquid 24 is filled from the rear end to the front end of the filling gap 18. During this time, the front end of the filling gap 18 is closed by the front end opening and closing member 19 of the slide portion 17 being sandwiched between the columnar portion 13 of the front end closing member 12 and the front end small diameter portion 10 of the outer tube 8. The dye solution 24 does not leak from the filling gap 18 toward the bundle needle 3.

  Next, after confirming that the dye solution 24 is filled in the filling gap 18, the terminal portion 6 of the hand operation unit 4 is pulled to move the bundle needle 3 to the storage position. During this time, the side hole 15 of the inner tube 9 is closed by the cylindrical rear end member 20 when the inner tube 9 moves rearward by the distance L1 shown in FIG.

  At this time, the front end portion of the filling gap 18 is connected to the space at the outer periphery of the rear end portion of the bundling needle 3, and the dye solution 24 filled in the filling gap 18 is placed at the rear portion of the bundling needle 3 by a distance L1. Extruded. The extruded dye liquid passes between the needles of the bundle needle 3 by capillary action and permeates the front end side of the bundle needle 3.

  Further, thereafter, the inner tube 9 is moved backward by a distance L2 shown in FIG. 9 until the bundle needle 3 reaches the storage position. During this time, the cylindrical rear end member 20 is pushed by the pushing member 16, so that the slide portion 17 is also moved backward by the distance L2. Thereby, the front-end part of the liquid agent administration apparatus 1 will be in the state shown in FIG.

  Next, in a state where the bundle needle 3 is housed in the outer tube 8, the liquid dispensing tube 2 of the liquid medicine administration device 1 is inserted into the endoscope from the forceps opening. This insertion is performed until the tip of the liquid dispensing tube 2 enters the field of view of the endoscope.

  Next, the terminal part 6 is pushed by operation of the hand operation part 4, and the bundle needle 3 is moved to a protrusion position. Thereby, the bundle needle 3 into which the dye solution 24 has permeated is in a state of protruding from the front end of the outer tube 8 as shown in FIG. Then, the bundle needle 3 is punctured at a target site to which a mark is to be given. As a result, the dye solution 24 penetrating the bundle needle 3 is administered to the target site, and a mark is provided.

  In addition, when a mark is given to a plurality of parts, the bundle needle 3 is punctured into each target part while moving the bundle needle 3 to the storage position and moving the bundle needle 3 to the protruding position. Repeat it. In the meantime, when the dose of the dye solution 24 to the target site is reduced and it becomes difficult to give a clear mark, the above-described pusher (plunger) is pushed to send the dye solution from the syringe or the like to the inner tube 9. The operation of injecting into the liquid may be performed.

  When the application of the mark to the target part is completed in this way, the liquid dispensing tube 2 is slowly removed from the endoscope in a state where the bundle needle 3 is positioned at the storage position and the bundle needle 3 is stored. Thereby, the inking treatment is completed. The removed used liquid medicine administration device 1 is safely discarded while paying attention to infection and contamination.

  According to the present embodiment, the dye solution 24 in the filling gap 18 penetrates the bundle needle 3 in a state where the side hole 15 of the inner tube 9 is closed by the cylindrical rear end member 20 as shown in FIG. . Then, the dye solution 24 that has permeated the bundle needle 3 is administered to the target site with the tip of the filling gap 18 closed as shown in FIG. Therefore, the minimum necessary dye solution can be easily administered to the target site.

  In addition, the dye liquid 24 is filled in the filling gap 18 with the front end closed, and the dye liquid 24 penetrates the bundle needle 3 in a state where the inflow of the dye liquid 24 into the filling gap 18 is restricted. Further, the dye solution 24 is administered to the target site with the tip of the filling gap 18 closed. Therefore, it is possible to prevent the dye solution 24 from leaking around the target site and making it difficult to secure a visual field by the endoscope.

  Further, the injection of the dye solution 24 into the inner tube 9 as necessary, the movement of the bundle needle 3 to the storage position, the movement of the bundle needle 3 to the protruding position, and the puncture of the target site of the bundle needle 3 are repeated. Thus, the dye solution 24 can be easily administered to a plurality of target sites while the solution administration device 1 is mounted on the endoscope.

  Moreover, since the flow path 23 is formed between the circumferential direction one end edge and other end edge of the pushing member 16, and the connection part 21 extended in the front-back direction through these, the path | route which the connection part 21 passes through And the circulation of the liquid agent around the push member 16 can be appropriately ensured.

  Further, the pushing member 16 extends in the circumferential direction of the inner tube 9 excluding the connecting portion 21 and the flow passage 23, and as shown in FIG. 4B, from one circumferential edge to the other edge. Has a partially cylindrical shape with a large central angle (the central angle of the missing portion is small and acute). For this reason, the inner tube 9 can be slidably supported with respect to the outer tube 8 by the pushing member 16. Therefore, the movement between the protruding position of the bundling needle 3 and the storage position and the movement of the slide portion 17 by the pushing member 16 associated therewith can be performed smoothly.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to this. For example, as long as it is possible to move the slide portion 17 by pushing the cylindrical rear end member 20 when the bundle needle 3 is moved to the storage position, the pusher member is replaced with the partial cylindrical pusher member 16 in another shape. The pushing member may be used. Moreover, you may use the liquid agent administration apparatus 1 in order to administer drugs, such as a gene and a test drug, to an affected part tissue.

  Further, as the liquid agent application portion, a sponge, porous ceramic, one needle, or the like may be used instead of the bundle needle 3. Further, as the moving part, instead of the inner cylinder part (inner cylinder tube 9 and front end closing member 12), a long member such as a wire passed through the gap between the outer cylinder tube 8 and the inner cylinder part is used. May be.

  Further, the first opening / closing part may be constituted by a member fixed to the outer tube 8 instead of the front end opening / closing member 19. In this case, it is preferable that the bundle needle 3 has a length stored in the outer tube 9 when moved to the storage position. Further, the second opening / closing part may be configured by a member fixed to the inner surface of the outer tube 9 instead of the cylindrical rear end member 20. In such a case, the connecting portion 21 is not necessary.

  DESCRIPTION OF SYMBOLS 1 ... Liquid agent administration apparatus, 3 ... Bundling needle (liquid agent provision part), 8 ... Outer cylinder tube (outer cylinder part), 9 ... Inner cylinder tube (inner cylinder part, moving part), 10 ... Front end small diameter part (movement prevention part) ), 12 ... Front end closing member (inner cylinder part, moving part), 15 ... Side hole (connection hole), 16 ... Pushing member, 17 ... Slide part, 18 ... Filling gap, 19 ... Front end opening / closing member (first opening / closing member) Part, first opening and closing member), 20 ... cylindrical rear end member (second opening and closing part, second opening and closing member), 21 ... connection part, 23 ... flow passage, 24 ... dye solution.

Claims (7)

An outer cylinder having an open front end;
A liquid agent applying part for applying a liquid agent to the target site located at the front end of the outer cylinder part; and
An inner cylinder part that is disposed inside the outer cylinder part and forms a filling gap in which the liquid agent is filled in the outer cylinder part, and has a connection hole that connects the inside and the filling gap. A tube part;
A moving part for moving the liquid agent application part between a protruding position protruding from a front end of the outer cylinder part and a storage position stored inside the outer cylinder part;
A first opening / closing portion that restricts the flow of the liquid agent from the filling gap to the liquid agent applying portion when the liquid agent applying portion is positioned at the protruding position and allows the liquid agent when the liquid agent applying portion is positioned at the storage position. A liquid medicine administration device.   The second opening / closing portion that opens the connection hole when the liquid agent application portion is located at the protruding position and closes the connection hole when the liquid agent application portion is located at the storage position. 2. The liquid medicine administration device according to 1. The liquid agent application part is provided at a front end part of the inner cylinder part,
The moving part is constituted by the inner cylinder part,
The first opening / closing part restricts the flow of the liquid agent to the liquid agent application part in close contact with the front end portion of the inner cylinder part when the liquid agent application part is located at the protruding position, and the liquid agent application part is The liquid medicine administration device according to claim 2, wherein the liquid medicine administration device is configured by a first opening / closing member that releases the restriction when moving to the storage position.   The second opening / closing part is located at a position where the connection hole is opened when the liquid agent application part is located at the protruding position, and the connection hole is closed when the liquid agent application part is located at the storage position. The liquid medicine administration device according to claim 2 or 3, comprising a second opening / closing member. The first opening / closing part and the second opening / closing part constitute a slide part that is connected by a connecting member and can slide integrally in the front-rear direction between the outer cylinder part and the inner cylinder part,
The outer cylinder portion includes a movement blocking unit that blocks the liquid agent application unit from moving forward relative to the protruding position.
The first opening / closing portion is formed of a cylindrical or annular member that supports the liquid agent application portion on the inside thereof, and when the liquid agent application portion is located at the projecting position, the front end portion of the inner cylinder portion and the outer portion It is sandwiched between the movement preventing part of the cylinder part and restricts the flow of the liquid agent,
The inner cylindrical portion, when said agent deposition unit is moved to the storage position from the projecting position, after the contact hole is closed by the second closing part, press the front Symbol slide portion corresponding to the storage position The liquid medicine administration device according to any one of claims 2 to 4, further comprising a pushing member that continues to support the liquid medicine application section by the first opening / closing section by moving to a position.   The solution administration device according to claim 5, wherein the second opening / closing part is configured by a member that defines a rear end of the filling gap.   The liquid drug administration device according to claim 1, wherein the liquid drug application unit is a bundling needle configured by bundling a plurality of needles.