JP2012029786A - Chemical expelling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical expelling device capable of ejecting a chemical with more sureness to a target site.SOLUTION: A chemical spray tool 10 serving as the chemical ejecting tool is a device used by being connected to an outlet 20 of a syringe 12 filled with a chemical L and spraying the chemical L supplied from the outlet 20. The chemical spray tool 10 includes: a proximal part 16 provided with an inlet 28 fittable to the outlet 20; a spray nozzle 14 provided with a micro passage 40 which is a spray hole for spraying the chemical L supplied from the outlet 20 to the inlet 28; and a flexible tube section 18 provided between the proximal part 16 and the spray nozzle 14 and provided with a passage 34 allowing the chemical L supplied to the inlet 28, to flow to the spray nozzle 14.

Description

  The present invention relates to a chemical solution discharge tool that is used by being connected to a syringe and discharges a chemical solution filled in the syringe.

  In the medical field, for example, in the treatment of stomatitis (affected area) caused by side effects of anticancer drugs or radiation therapy, an aqueous solution such as a non-steroidal anti-inflammatory drug is sprayed to the entire oral cavity with a spray container for the pain relief. Things have been done. In addition, for example, when treating an affected part in the nasal cavity, a chemical spraying tool (medical solution discharge tool) connected to the tip of a syringe may be used (see Patent Documents 1 to 3).

Japanese Utility Model Publication No. 58-43415 Utility Model Registration No. 3047521 JP-A-8-47530

  In the configuration using the chemical solution spraying tool connected to the spray container or the syringe as described above, a spray nozzle for spraying the chemical solution is integrally provided at one end of the container or the syringe. For this reason, it is difficult to deliver the spray nozzle to the target site (affected part) in the oral cavity or nasal cavity, and the chemical solution is sprayed to the entire oral cavity or nasal cavity in a state where it cannot be determined whether the target solution is sprayed reliably. Will be. As a result, the therapeutic effect on the affected area is reduced, and there is a possibility that the drug may be excessively used or the patient may accidentally swallow.

  The present invention has been made in consideration of such a conventional problem, and an object thereof is to provide a chemical solution discharger capable of more reliably discharging a chemical solution to a target site.

  A chemical solution discharge device according to the present invention is used by being connected to an outlet port of a syringe filled with a chemical solution, and discharges the chemical solution supplied from the outlet port. A base provided with a fitting inlet, a discharge nozzle provided with a discharge hole for discharging the chemical liquid supplied from the outlet to the inlet, and between the base and the discharge nozzle Provided with a flexible tube portion provided with a flow path through which the chemical liquid supplied to the injection port is circulated to the discharge nozzle, and the tube portion may maintain its bent state. It has a shape holding function that can be performed.

  According to such a configuration, by providing a flexible tube portion between the base connected to the syringe and the discharge nozzle that discharges the liquid medicine, for example, the liquid medicine discharge tool can be used as a therapeutic agent for stomatitis. When using it as a discharge device, the tube part can be applied to the target part (affected part) in a position where it is difficult to approach the discharge nozzle, such as the back part of the oral cavity or the back side of the teeth, depending on the shape of the oral cavity. It is possible to approach smoothly while flexing as appropriate. For this reason, a chemical | medical solution can be reliably discharged with respect to the target site | part. In addition, since the tube portion has a shape maintaining function capable of maintaining its bent state, the tube portion can be deformed into a desired bending posture according to the position of the target portion for discharging the chemical solution, and the discharge nozzle Therefore, it is possible to set the injection direction of the chemical liquid in a desired direction more reliably.

  The tube portion may be provided with a shape holding member for holding the bent state, whereby the shape holding function may be achieved. The shape-retaining member is wound on the outer peripheral surface of the tube part or a coil wound at least partially embedded in the outer peripheral wall surface of the tube part, or along the flow path of the tube part. If it is a linear member or a plate-like member embedded in the wall surface, a shape holding mechanism can be easily added to the tube portion.

  The discharge hole can discharge a chemical solution more smoothly when it has a structure having a collective flow path in which the downstream sides of a plurality of micro passages having different flow directions are gathered.

  According to the present invention, there is provided a tube portion having a shape holding function that has flexibility and can hold a bent state between a base connected to a syringe and a discharge nozzle that discharges a chemical solution. Provide. This makes it possible to smoothly approach the target portion at a position where it is difficult to approach the discharge nozzle while flexing the tube portion appropriately according to the peripheral shape of the target portion. In contrast, the chemical solution can be reliably discharged. In addition, since the tube portion has a shape maintaining function capable of maintaining its bent state, the tube portion can be deformed into a desired bending posture according to the position of the target portion for discharging the chemical solution, and the discharge nozzle Therefore, it is possible to set the injection direction of the chemical liquid in a desired direction more reliably.

It is a disassembled perspective view which shows the chemical | medical solution spray tool and syringe which concern on one Embodiment of this invention. It is a side view in the state where the chemical | medical solution spray tool shown in FIG. 1 was connected to the syringe. It is a partial cross section side view of the chemical | medical solution spray tool shown in FIG. It is sectional drawing which follows the IV-IV line in FIG. It is sectional drawing of the structural example using the linear member as a shape holding member. It is explanatory drawing which shows a mode that a chemical | medical solution is sprayed with respect to the affected part in an oral cavity with the syringe which connected the chemical | medical solution spraying tool. It is a partial cross section side view of the structural example which comprised the flow path of the tube part by the small diameter flow path and the enlarged diameter flow path. It is a side view of the example of composition using a coil as a shape maintenance member. It is side surface sectional drawing which shows the 1st modification of a spray nozzle. It is side surface sectional drawing which shows the 2nd modification of a spray nozzle. FIG. 11A is a side cross-sectional view of a configuration example in which a lock mechanism is provided at a connection portion between a syringe and a chemical spraying tool, and FIG. 11B is a side cross-sectional view in which the lock mechanism shown in FIG. 11A is in a locked state.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a chemical solution discharge tool according to the present invention will be described with reference to the accompanying drawings by giving preferred embodiments in relation to a syringe to which the discharge tool is connected.

  FIG. 1 is an exploded perspective view showing a chemical liquid spraying tool 10 and a syringe 12 connecting the chemical liquid spraying tool 10 according to an embodiment of the present invention, and FIG. 2 shows the chemical liquid spraying tool 10 shown in FIG. FIG. FIG. 3 is a partial cross-sectional side view of the chemical sprayer 10.

  A chemical liquid spraying tool 10 (hereinafter, also simply referred to as “spraying tool 10”) as a chemical liquid discharging tool according to the present embodiment is used by being connected to the tip of a syringe 12 filled with the chemical liquid L. This is a device for discharging (spraying) from the discharge nozzle (spray nozzle 14) to the target site. Below, the chemical | medical solution spraying tool 10 which applied the spray nozzle 14 which can spray the chemical | medical solution L as an example of a discharge nozzle is illustrated, and the structural example of the chemical | medical solution discharge tool which concerns on this invention is demonstrated.

  For example, in the treatment of stomatitis, the spray device 10 inserts the tube portion 18 extending from the base portion 16 connected to the syringe 12 into the oral cavity of the patient, and sprays the liquid medicine (therapeutic agent) L supplied from the syringe 12. It is used as a medical device that sprays from the nozzle 14 to the affected area. The drug solution L may be appropriately selected according to the application of the spraying tool 10, but for example, an aqueous solution of a non-steroidal anti-inflammatory analgesic or the like can be used.

  Hereinafter, in the side view of FIG. 3, the left side (base 16 side) of the tube portion 18 is referred to as a “base end (rear end)” side, and the right side (spray nozzle 14 side) of the tube portion 18 is referred to as a “front end” side. To do.

  As shown in FIGS. 1 and 2, the syringe 12 is configured to define a chemical chamber by sliding in a liquid-tight manner within the outer cylinder 22 and an outer cylinder (cylinder) 22 provided with a reduced diameter outlet 20 at the tip. And a pusher (plunger rod) 26 for moving the gasket 24 attached to the tip in the front-rear direction (axial direction). The outlet 20 is an opening for allowing the chemical liquid L to flow inside and outside the outer cylinder 22, and is a tapered tapered convex portion protruding from the distal end surface of the outer cylinder 22.

  As shown in FIGS. 1 to 3, the spray tool 10 includes a base portion (connector portion) 16 provided with an injection port 28 that can be fitted to the outlet 20 of the syringe 12, and an axial direction extending from the distal end of the base portion 16. The tube portion 18 having a small diameter and a long diameter and the spray nozzle 14 provided at the tip of the tube portion 18 are provided.

  The base 16 has a flange 30 at the base end to which a user puts a finger when connecting the spraying tool 10 to the syringe 12, that is, when fitting the injection port 28 to the outflow port 20, at the center thereof. The inlet 28 is open. A base channel 32 that communicates with the inlet 28 is formed in the base 16 so as to extend in the axial direction.

  The tube portion 18 is a flexible tubular member that is connected and fixed to the distal end of the base portion 16, and forms a flow path 34 whose lumen communicates with the base flow path 32 in a liquid-tight manner. Therefore, the chemical liquid L supplied from the outlet 20 of the syringe 12 to the inlet 28 of the base 16 flows from the base channel 32 to the distal end side of the tube portion 18 via the channel 34 and to the spray nozzle 14 at the tip. Supplied with. In addition to being formed by the lumen of the tube portion 18, the flow path 34 has, for example, a configuration in which another small tube (not shown) is inserted into the lumen as a double tube. Good.

  A plate-like member (band-like member) 36 is provided on the inside of the wall surface of the tube portion 18, that is, between the inner wall surface and the outer wall surface that define the flow path 34, over the entire length from the proximal end to the distal end. Is embedded (see FIGS. 3 and 4). The plate-like member 36 is made of a metal thin plate such as stainless steel or aluminum, or a resin thin plate capable of plastic deformation such as ultrahigh molecular weight polyolefin or ethylene-α-olefin copolymer, so that the bent state is maintained. It is a possible shape retaining member. That is, since the plate-like member 36 which is a shape maintaining member is mixed in the wall surface along the longitudinal direction of the flexible tube portion 18, the tube portion 18 can maintain its bent state. A shape-retaining function is provided (see FIG. 2).

  The plate-like member 36 may be formed by a linear member 37, for example, instead of a plate-like shape, as long as it functions as a shape-holding member for bending the tube portion 18 into a desired shape and holding the state. (See FIG. 5). When the linear member 37 is used, in order to ensure the shape retaining function more reliably, a plurality of tubes (four configurations are illustrated in FIG. 5) are arranged at equal intervals in the circumferential direction of the tube portion 18. May be. Of course, two or more plate-like members 36 may be provided. Moreover, since the linear member 37 can be comprised with a thin metal wire etc., it can also be affixed and used on the outer surface of the tube part 18, for example.

  The spray nozzle 14 has a tapered substantially conical shape integrally provided at the tip of the tube portion 18, and as shown in FIG. 3, a tapered nozzle channel 38 communicating with the channel 34, and the nozzle channel And a plurality of (seven configurations are illustrated in FIG. 3) micro passages 40 that open from 38 to the outer wall surface. Each microchannel 40 is a spray hole that opens to the outer surface of the spray nozzle 14 in different directions that are substantially radially. Therefore, the chemical liquid L that has flowed from the flow path 34 of the tube portion 18 to the nozzle flow path 38 is surely sprayed from each minute passage 40 to the periphery of the spray nozzle 14.

  Although the material of the spraying tool 10 is not specifically limited, For example, as the base part 16 and the spray nozzle 14, it is good to use resin, such as polyvinyl chloride, polyethylene, a polypropylene, polyamide. Moreover, the tube part 18 should just be a material which can ensure flexibility, for example, when resin, such as a polyvinyl chloride, polyethylene, a polypropylene, polyamide, is used and it is comprised more flexibly than the base 16 or the spray nozzle 14. Good.

  Moreover, as for the dimension of the spraying tool 10, the tube part 18 has an outer diameter of about 0.5 mm to 5.0 mm, preferably about 1.0 mm to 2.0 mm, and a wall thickness of 0.1 mm to 2.mm. About 0 mm, preferably about 0.5 mm to 1.0 mm, about 50 mm to 300 mm in length, preferably about 50 mm to 100 mm, and the inner diameter of the flow path 34 serving as a lumen is about 0.3 mm to 4.0 mm, A tubular shape with a thickness of about 1.0 mm to 2.0 mm is preferable.

  The plate-like member 36 embedded in the tube portion 18 has a length of about 50 mm to 300 mm, preferably about 50 mm to 100 mm, and a plate thickness of about 0.05 mm to 1.9 mm, preferably 0.5 mm to 1. .2 mm and the plate width is about 0.05 mm to 4 mm, preferably about 0.5 mm to 1.5 mm. In a similar manner, the linear member 37 has a wire diameter of about 0.1 mm to 1.9 mm. The length may be equal to that of the plate-like member 36, preferably about 0.5 mm to 1.5 mm.

  The spray nozzle 14 has a length of, for example, about 3 mm to 20 mm, preferably about 5 mm to 10 mm, and the micro passage 40 has, for example, an inner diameter of about 0.01 mm to 0.2 mm, preferably about 0.05 mm to 0.1 mm. It is good to be. The dimensions of the tube portion 18 and the size of the spray nozzle 14 may be set appropriately and optimally depending on the type and spray amount of the chemical liquid L, the application site (oral cavity and nasal cavity) of the spray tool 10, and the like.

  Next, an example of a chemical spraying method using the spraying tool 10 configured as described above will be described with reference to FIG. FIG. 6 is an explanatory view showing a state in which the liquid medicine L is sprayed onto the affected part (stomatitis) A in the oral cavity 42 by the syringe 12 connected to the spraying tool 10.

  As the drug solution L that is a therapeutic drug for the affected area A, for example, a drug having an anti-inflammatory action, a disinfection action, or a moisturizing action is used, and these drugs are used alone or in combination as a drug solution L, and the outer cylinder of the syringe 12 22 is filled.

  Next, the spraying tool 10 is attached to the syringe 12 by fitting the injection port 28 of the spraying tool 10 to the outlet 20 of the syringe 12 filled with a predetermined amount of the chemical liquid L. Therefore, after pushing the pusher 26 slightly to perform priming for supplying the chemical L to the spray nozzle 14 side of the spray tool 10, the spray nozzle 14 and the tube portion 18 are inserted into the oral cavity 42 as shown in FIG. Then, after the tip of the spray nozzle 14 is placed close to the affected area A which is the target site, the pusher 26 is pushed in. Thereby, the chemical | medical solution L can be supplied from the syringe 12 to the spray nozzle 14, and the treatment which sprays the chemical | medical solution L to the affected part A and its peripheral part can be performed.

  In this case, in the spraying tool 10 according to the present embodiment, the spray nozzle 14 is provided at the tip of the tube portion 18 that has flexibility and is formed with a predetermined long dimension. For this reason, the tube portion 18 is appropriately set in accordance with the shape in the oral cavity 42 even for a target site (affected area A) that is difficult to approach the spray nozzle 14 such as the back of the oral cavity 42 or the back side of the teeth. It is possible to approach smoothly while bending and bending. For this reason, the chemical | medical solution L can be reliably sprayed with respect to the target site | part, and it can prevent that the chemical | medical solution L is sprayed to the whole oral cavity 42. FIG.

  Moreover, in the spraying tool 10, the plate-like member 36 (linear member 37) that is a shape maintaining member is provided in the tube portion 18, so that the tube portion 18 is set in a desired bending posture and the chemical solution by the spray nozzle 14 is used. The injection direction of L can be set to a desired direction. Therefore, the tube portion 18 can be easily formed in a shape that can avoid teeth, gums, and the like, even for a target portion that is difficult to approach the spray nozzle 14 such as the back of the oral cavity 42 or the back side of the teeth. Further, the spray nozzle 14 can be arranged in front of the affected area. This makes it possible to more reliably spray the desired amount of the drug solution L on the target site for treatment, and more reliably prevent the drug solution L from being sprayed on the entire oral cavity 42 and causing waste. Can do.

  In order to further reduce the waste of such a chemical solution L, for example, as shown in FIG. It is also possible to employ a configuration in which the diameter channel 34 a is provided and the diameter-enlarged channel 34 b that is enlarged only on the tip side near the nozzle channel 38 is provided. If it does so, the waste (dead volume) of the chemical | medical solution L in the tube part 18 long compared with the base 16 and the spray nozzle 14 can be reduced as much as possible by the small-diameter small diameter flow path 34a.

  Further, as a shape holding member that gives the tube portion 18 a shape holding function, it is of course possible to use a member other than the plate member 36 and the linear member 37 described above. For example, as shown in FIG. Instead of the member 36, a spiral coil 44 may be wound around the entire length from the proximal end to the distal end of the outer peripheral surface of the tube portion 18 or a part thereof.

  The coil 44 can be formed of the same material as that of the plate-like member 36. For example, a resin capable of plastic deformation such as a fine metal wire such as stainless steel or aluminum, an ultrahigh molecular weight polyolefin, an ethylene-α-olefin copolymer, or the like. It is a shape holding member that can hold a bent state by being constituted by thin wires. When such a coil 44 is wound around the outer surface of the flexible tube portion 18, the tube portion 18 has a shape maintaining function capable of maintaining its bent state. For example, the coil 44 may be formed with a wire diameter of about 0.1 mm to 2.0 mm, preferably about 0.5 mm to 1.2 mm.

  In addition to the configuration in which the coil 44 is wound on the outer surface of the tube portion 18, for example, a configuration in which the coil 44 is partially buried in the wall surface of the tube portion 18 and wound, or substantially the same as the plate-like member 36. Further, a configuration or the like completely embedded in the wall surface of the tube portion 18 may be used.

  Of course, the spray nozzle 14 may have a configuration other than the configuration in which the plurality of micro passages 40 are opened on the outer surface of the nozzle. For example, as shown in FIG. 9, a plurality of micro passages 46 (in FIG. By assembling the downstream side (discharge side) of the four configurations (example), the flow direction of the chemical liquid L is changed, thereby configuring the spray nozzle 14a to spray the chemical liquid L from the collective flow path 48 which is a spray hole. You can also

  Furthermore, as shown in FIG. 10, the spray nozzle 14 b configured separately from the tube portion 18 may be attached to the tip of the tube portion 18. A concave portion 50 is formed on the inner surface on the proximal end side of the spray nozzle 14 b, and a convex portion 52 that engages with the concave portion 50 is formed on the outer surface on the distal end side of the tube portion 18. Is engaged and fixed to the tip of the tube portion 18. FIG. 10 illustrates a configuration in which a spray hole 54 formed of a stepped hole is formed at the tip of the spray nozzle 14b. The spray hole of the spray nozzle 14b is a minute one shown in FIG. 3 or FIG. It is good also as a structure provided with the channel | path 40, the micro channel | path 46, and the aggregate flow path 48. FIG.

  When the spray nozzle 14b that can be fitted to the tip of the tube portion 18 is used in this way, the shape of the spray nozzle (spray hole) provided at the tip of the tube portion 18 is appropriately selected according to the specifications and applications of the spray tool 10. The productivity and versatility of the spraying tool 10 are improved.

  The discharge nozzle may have a configuration other than the spray nozzles 14, 14 a, 14 b configured to spray the chemical solution from the spray hole at the tip as described above. The structure which discharges from a discharge hole may be sufficient.

  By the way, in the said spraying tool 10, in order to inject the chemical | medical solution L in the shape of a mist or to discharge a micro flow, the spray hole of the spray nozzle 14 (14a, 14b) at the tip is formed in a very small diameter. Therefore, the chemical liquid L discharged from the syringe 12 generates a predetermined high pressure (resistance). Therefore, in addition to the normal taper fitting structure (luer taper fitting structure) shown in FIG. 3, for example, a locking mechanism 56 shown in FIG. 11A and FIG. It is also effective to use a taper fitting structure (a luer lock structure).

  As shown in FIGS. 11A and 11B, the lock mechanism 56 includes a female screw 62 formed on the inner peripheral surface of a cylindrical portion 60 disposed with a gap 58 on the outer peripheral side of the outlet 20 of the syringe 12, and a base portion. 16 is composed of a male screw 64 formed on the outer peripheral surface of the base end side instead of the flange 30 (see FIG. 3). The male screw 64 on the spraying tool 10 side is screwed onto the female screw 62 on the syringe 12 side, whereby the syringe 12 and the spraying tool 10 can be more reliably fitted and fastened. Note that the luer lock structure provided with the lock mechanism 56 is more effective when applied to a configuration having the small-diameter channel 34a shown in FIG. This is because the pressure (resistance) of the chemical liquid L discharged from the syringe 12 is further increased by the small diameter channel 34a.

  The present invention is not limited to the above-described embodiment, and it is needless to say that various configurations or processes can be adopted without departing from the gist of the present invention.

  For example, the syringe for connecting the chemical spraying tool 10 may have a configuration other than the syringe 12 shown in FIG. 1, and the chemical liquid L filled therein can be reliably delivered to the spraying tool 10 at a predetermined pressure. Any structure having a simple liquid feeding mechanism may be used.

  The use of the drug solution spray device 10 is not limited to the treatment of stomatitis described above. For example, a device for spraying a drug on an inflamed site (affected area) in the nasal cavity, a catheter, an endoscope, etc. It can also be used as an anesthetic spray device when inserting a tube or a nasal tube, and for applications other than administration of these local anesthetics, for example, administration of antiallergic drugs, vaccines, etc. Furthermore, it can also be used as a device for spraying a drug solution during endoscopic surgery.

DESCRIPTION OF SYMBOLS 10 ... Chemical solution spraying tool 12 ... Syringe 14, 14a, 14b ... Spray nozzle 16 ... Base 18 ... Tube part 20 ... Outflow port 28 ... Injection port 34 ... Flow path 36 ... Plate-shaped member 37 ... Linear member 40, 46 ... Minute Passage 44 ... Coil 48 ... Collecting flow path 56 ... Locking mechanism

Claims (4)

It is used by being connected to an outlet of a syringe filled with a chemical, and is used for discharging the chemical supplied from the outlet,
A base provided with an inlet that can be fitted to the outlet;
A discharge nozzle provided with a discharge hole for discharging the chemical liquid supplied from the outlet to the injection port;
A flexible tube portion provided between the base and the discharge nozzle and provided with a flow path for flowing the chemical solution supplied to the injection port to the discharge nozzle;
With
The said liquid | tube part has a shape maintenance function which can hold | maintain the bending state, The chemical | medical solution discharge tool characterized by the above-mentioned. In the chemical solution discharge tool according to claim 1,
The tube portion is provided with a shape holding member for holding the bent state. In the chemical solution discharge tool according to claim 2,
The shape holding member is a coil wound on the outer peripheral surface of the tube part, or a coil wound at least partially embedded in the outer peripheral wall surface of the tube part, or the coil of the tube part A chemical solution discharge tool, which is a linear member or a plate-like member embedded in a wall surface along a flow path. In the chemical | medical solution discharge tool of any one of Claims 1-3,
The said discharge hole has a collection flow path which gathered the downstream of the several micro channel from which a distribution direction differs, The chemical | medical solution discharge tool characterized by the above-mentioned.

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