KR20170018159A - Medical fluid injection device for neuroplasty and Method for injecting the medical fluid - Google Patents

Medical fluid injection device for neuroplasty and Method for injecting the medical fluid Download PDF

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Publication number
KR20170018159A
KR20170018159A KR1020150110828A KR20150110828A KR20170018159A KR 20170018159 A KR20170018159 A KR 20170018159A KR 1020150110828 A KR1020150110828 A KR 1020150110828A KR 20150110828 A KR20150110828 A KR 20150110828A KR 20170018159 A KR20170018159 A KR 20170018159A
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South Korea
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cannula
catheter
trocar
needle
tip
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KR1020150110828A
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Korean (ko)
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맹성호
김창용
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(주)세원메디텍
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Publication of KR20170018159A publication Critical patent/KR20170018159A/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B17/3421—Cannulas
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
    • A61B17/3421—Cannulas
    • A61B17/3423—Access ports, e.g. toroid shape introducers for instruments or hands
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
    • A61B17/34—Trocars; Puncturing needles
    • A61B17/3468—Trocars; Puncturing needles for implanting or removing devices, e.g. prostheses, implants, seeds, wires
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/0067—Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00—Catheters; Hollow probes
    • A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
    • A61M25/02—Holding devices, e.g. on the body

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  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
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  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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  • Anesthesiology (AREA)
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  • Infusion, Injection, And Reservoir Apparatuses (AREA)
  • Media Introduction/Drainage Providing Device (AREA)

Abstract

The present invention relates to a device for injecting a drug solution for decompression neuroplasty and a method for injecting a drug solution. The chemical liquid injecting apparatus includes: a cannula having a through passage; A trocar and an approach needle inserted into the through passage of the cannula; And a catheter inserted into the penetration path of the cannula and configured to inject the drug solution injected from the outside into the target point through the ejection passage in a state where the distal end of the catheter is projected to the outside of the cannula.
The liquid injector can precisely position the cannula at a target point inside the vertebrae using an aprocessing needle, thereby improving the accuracy of the procedure. Particularly, the liquid injecting device opens the liquid injecting hole formed in the catheter in the lateral direction of the catheter, Sectional area of the drug solution passing through the hole can be expanded, so that the injection rate of the drug solution can be fast and the drug solution can be spread widely, so that a simple and quick procedure can be performed. Furthermore, the soft catheter inserted into the inside of the canula can be inserted into the cannula So that the syringe is connected to the catheter rather than the cannula, and the chemical solution is injected. Thus, the cannula is not likely to move during the procedure, so that it is possible to carry out the procedure safely and safely.

Description

Technical Field [0001] The present invention relates to a device for injecting a drug solution for decompression neuroplasty,

The present invention relates to a device for injecting a drug solution for decompression neuroplasty and a method for injecting a drug solution.

Decompressive neuroplasty, which is mainly performed in neurosurgery, is a treatment aimed at reaching a specific drug at the painful part of the vertebrae, calming nerve edema or inflammation causing pain, or removing nerve stenosis or adhesion site. Compared to other procedures, the use of a relatively large amount of drug solution is advantageous in that the pain relief is rapid, the treatment effect is long, the procedure time is short and simple.

Such decompression neuroplasty includes the step of approaching the end of the catheter to the point of pain in the spinal epidural space using a drug infusion device having an elongated catheter and injecting the special drug through the catheter from the outside.

An epidural catheter proposed by the inventor of the present application (Domestic Registered Utility Model No. 20-0467660, registered on June 20, 2013) as the above-described chemical liquid injecting apparatus. The epidural catheter includes a body having a long elongated flexible tube, a main body fixed to a rear end of the flexible tube and having an inner channel for guiding a drug solution supplied from the syringe to the flexible tube, and a flexible tube The guide wire is formed by a guide wire.

The flexible tube passes through the open hole of the patient's tail bone in the state where the guide wire is inserted, and enters the inside of the vertebrae, and the distal end portion of the flexible tube is applied to the adhesion site or the scar site of the epidural anchor.

However, the above-described epidural catheter is disadvantageous in that it is somewhat inconvenient when the flexible tube has to be deeply inserted into the spinal column through the caudal bone. For example, when the destination is, for example, one to three times of thoracic vertebrae, or cervical vertebrae, it is difficult to accurately reach the desired position of the flexible tube.

The reason is that in order to reach the target point, it is necessary to meet a lot of intersections in a very narrow space, and also to pass through the curved portion. There is a great risk of damaging intact nerves, tissues or blood vessels during the process of moving the flexible tube into the spinal column.

For this reason, instead of using a flexible tube in consideration of the condition of the patient and various conditions, the patient may select a surgical procedure to inject the medicament directly into the back of the back of the spine. In other words, injecting the drug directly into the spinal column at the point of pain in the spinal column of the patient lying down (while looking at a C-arm imaging device).

However, there is also a problem with the procedure of inserting a needle into the vertebrae and injecting a drug solution. That is, the syringe can move while the drug solution is extruded. Since the syringe is used by the practitioner by hand, the injector needle inserted inside the vertebrae can greatly damage the normal nerve in the vertebrae when the injector accidentally swings the syringe at the time of injection. This problem can lead to even more serious consequences because the tip of the injection needle is sharp.

The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a catheter that can accurately position a cannula at a target point in a vertebra using an embryo needle, And the drug solution injecting device of the present invention is capable of expanding the cross-sectional area of the drug solution passing through the spray hole, thereby allowing the drug solution to be injected at a high speed and spreading the drug solution widely. There is purpose in.

Further, since the soft catheter inserted into the inside of the cannula is extended long enough to the rear of the cannula and the syringe is connected to the catheter rather than the cannula to inject the chemical solution, the cannula is not likely to move during the operation And it is an object of the present invention to provide a drug solution injecting device for decompression neuroplasty which enables safe and safe operation.

In addition, the present invention provides a method of injecting a chemical solution, which can set the cannula to the correct posture and position by separately operating the trocar and the procuring needle, and injecting the chemical solution through the soft catheter, The purpose is to provide.

In order to achieve the above object, the apparatus for injecting a drug solution for decompression neuroplasty according to the present invention comprises: a cannula extending in a longitudinal direction and having a through passage so that a part of the cannula can be inserted into the body; A trocar which is inserted into the body together with the cannula in a state of being inserted into the through passage of the cannula, and a tip portion protruding outside the cannula is formed at the tip end; After the cannula and the trocar combination are inserted into the body, the trocar is removed to move to the final target position together with the cannula in a state of being inserted in the through passage of the secured cannula to reach the tip of the cannula An approach needle protruding from the distal end of the cannula in a state of being coupled to the cannula and having a career securing part formed in a streamline shape to prevent damage to the internal tissues when the internal cannula is moved; The cannula and the approach needle assembly reach the target point, the approach needle is removed and inserted into the through-hole of the secured cannula, and the distal end portion thereof is set so as to protrude to the outside of the cannula, Wherein the spray hole includes a catheter that is opened in a lateral direction of the distal end portion.

In addition, a connector separated from the cannula is provided at the rear end of the catheter so as to guide the drug solution, which is combined with the spout of the syringe containing the medicament, extruded from the syringe into the catheter, .

The catheter may further comprise: A main body part having a predetermined inner diameter and extending in the longitudinal direction and having a rear end extending to the outside of the cannula; and an end opposite to the end part joined to the main body part integrally joined to the distal end part of the main body part, Which is used for inserting the catheter into the penetration passage of the cannula and which is inserted into the catheter through the connector and whose tip reaches the tip clogged portion Further comprising a guide wire for moving the catheter in the longitudinal direction in the through-passage while pushing the tip clogged portion in the state.

The cannula further comprises: A cannula body having a predetermined inner diameter and extending in the longitudinal direction; an introduction part fixed to the rear end of the cannula body and guiding the cannula body to the cannula body through the trocar or a pro- In the introduction part; And a stopper for restricting the protruding length of the trocar or the pro- ducting needle relative to the distal end of the cannula main body.

In addition, a cylindrical handle for providing a female screw hole is fixed to the rear end of the trocar and the pro- processing needle, and the introduction part is screwed to the knob to maintain the relative position of the knob to the stopper And a holding portion is further provided.

Further, the career securing portion is formed by machining the tip portion of the approach needle, and is characterized by taking the form of a hemispherical shape.

According to another aspect of the present invention, there is provided a method of injecting a drug solution, the method comprising: a first step of preparing a hollow tubular cannula extending in a longitudinal direction and having a through hole with a predetermined inner diameter so that a part of the drug can be inserted into the body; A cannula and a trocar assembly are inserted into the body while the trocar is inserted into the through passage of the cannula, the trocar being extended in the longitudinal direction and having a blade at the tip thereof, so that the cutter is projected to the outside of the cannula A second step; A third step of removing the trocar from the cannula after the second step and emptying the penetrating passageway; The cannula and the cannula are connected to each other so as to protrude to the outside of the cannula, wherein the cannula is inserted into the through hole of the cannula, A fourth step of bringing the picking needle closer to the target point in the body and then removing the proching needle; After completion of the fourth step, a catheter extending in the longitudinal direction and having a blind end and a blast hole formed on the side of the distal end is inserted into the through passage of the canula, and the blind hole is set to be exposed to the outside of the cannula A fifth step; And a sixth step of injecting the drug solution into the rear end of the catheter so that the drug solution is applied to the target spot through the jet hole through the catheter.

The apparatus for injecting a drug solution for decompression neuroplasty according to the present invention can precisely position the cannula at a target point inside the vertebra using an aprocessing needle, thereby improving the precision of the procedure. Particularly, The hole can be opened in the lateral direction of the catheter to expand the cross-sectional area of the cross-section of the drug solution passing through the spray hole, so that the drug solution can be injected at a high speed and the drug solution can be spread widely.

In addition, since the soft catheter inserted into the cannula is extended long enough to the rear of the cannula, and the syringe is connected to the catheter rather than the cannula, the chemical solution is injected, so that the cannula does not move during the procedure. I can do it.

In addition, according to the method of injecting a drug solution of the present invention, the trocar and the propping needle can be separately operated to set the cannula to the correct attitude and position, and the drug solution is injected through the soft catheter, safe.

1 is a view for explaining the overall configuration of a drug solution injector for decompression neuroplasty according to an embodiment of the present invention.
FIGS. 2A, 2B, and 2C are views showing various types of blades that can be applied to the tip end portion of the trocar body shown in FIG.
FIG. 3A is a cutaway perspective view for explaining the structure of the catheter tip portion shown in FIG. 1; FIG.
3B is a perspective view showing another example of the distal end portion of the catheter shown in FIG.
FIGS. 4A and 4B are cross-sectional views showing still another example of the distal end portion of the catheter shown in FIG. 1. FIG.
FIGS. 5A to 5D are views for explaining a chemical solution injecting method using a chemical injector for decompression neuroplasty according to an embodiment of the present invention.

Hereinafter, one embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing the overall configuration of a drug solution injector 11 for decompression neuroplasty according to an embodiment of the present invention.

As shown in the drawing, the chemical liquid injector 11 according to the present embodiment includes a cannula 13 extending in the longitudinal direction and a part of which is inserted into the vertebrae of the body, A trocar 15 and an airproaching needle 17 inserted and used in the interior of the cannula 13 and a catheter 19 for applying the chemical solution to the site of inflammation or stenosis or adhesion A guide wire 25 inserted into the catheter 19 at the time of setting the catheter 19 and a syringe 29 injecting a drug solution into the catheter 19.

The cannula 13 includes a guide portion 13a having a through hole 13f having a predetermined inner diameter and extending in the longitudinal direction, an introduction portion 13b fixed to a rear end portion of the guide portion 13a, And a position adjustment tab 13e fixed to the introduction portion 13b. Basically, the cannula 13 serves as a passage through which the catheter 19 is passed. The catheter 19 is easily inserted into the body through the passage secured by the cannula 13 to inject the drug.

The guide portion 13a of the cannula 13 is a stainless steel hollow tube having a through-hole 13f having a constant diameter and has an inclined portion 13g on the outer peripheral surface of the tip portion. The inclined portion 13g is formed to have a small resistance when the cannula 13 is inserted into the body as a portion which is broken in the tip direction of the guide portion 13a.

The introducing portion 13b is an element fixed to the rear end portion of the guide portion 13a and passes through the trocar 15 and the aprocessing needle 17 or the catheter 19 to guide the guide portion 13a And an internal passage (not shown) leading to the through passage 13f.

The introduction part 13b is provided with a stopper 13d and a coupling and holding part 13c. The engaging and holding portion 13c is a cylindrical portion having a male thread formed on the outer peripheral surface thereof. The engaging and holding portion 13c is a portion where the trocar 15 and the grips 15b and 17c of the propelling needle 17 are screwed together.

When the knobs 15b and 17c are screwed into the engagement holding portion 13c with the trocar body 15d and the needle body 17a inserted into the guide portion 13a, It is a matter of course that the trocar 15 or the aprochetting needle 17 is engaged with each other.

The stopper 13d serves to limit the degree of engagement of the grips 15b and 17c with respect to the introduction portion 13b. By the action of the stopper 13d, movement of the knobs 15b, 17c in the direction of arrow z is restricted as shown in Fig. 5A.

The action of such a stopper 13d has an important meaning. Since the protruding length C of the trocar main body (15d of Fig. 5) protruding from the tip end portion of the guide portion 13a and the protruding length D of the needle main body 17a can be accurately calculated because the stopper 13d is provided to be. A description thereof will be given later.

The position adjusting tab 13e is a part that pushes or pulls the cannula 13 with the finger when inserting or removing the cannula 13 into the body. By applying the position adjusting tab 13e in this way, the setting of the cannula 13 becomes very easy. In some cases, the position adjustment tab 13e may not be applied.

The trocar 15 is a member to be inserted into the cannula 13 together with the cannula 13 while being inserted into the cannula 13. The trocar 15 comprises a trocar body 15d made of stainless steel and a handle 15b.

The trocar main body 15d is a straight member having the same diameter as the inner diameter of the through passage 13f of the cannula 13 and has a tip end portion 15a. The blade portion 15a serves to pierce the skin and subcutaneous fat layer. The shape of the blade portion 15a can be variously changed and is symmetrical with respect to the central axis of the trocar body 15d.

The blade portion 15a is protruded by a length C to the outside of the distal end portion of the guide portion 13a while the trocar 15 is engaged with the cannula 13 as shown in FIG.

The reason why the blade portion 15a is protruded to the outside of the guide portion 13a is that the combination of the cannula 13 and the trocar 15 reduces the opening speed of the skin or subcutaneous fat layer when entering the body, .

5A, a trocar body 15d having a predetermined diameter is positioned behind the blade portion 15a, an inclined portion 13g is positioned behind the exposed portion of the trocar body 15d, The guide portion 13a is arranged in the rear of the portion 13g so that the skin can be drilled step by step without being punctured at one time so that the resistance penetrating the skin is divided into two portions.

In other words, the hole of the skin first opened by the blade portion 15a is expanded once at the blade portion 15a, passes through the exposed portion of the trocar body 15d without any resistance, And then slides on the outer circumferential surface of the guide portion 13a of the cannula 13.

Since the expansion of the skin is performed twice in the blade portion 15a and the inclined portion 13g in this way, the maximum value of the resistance generated when the cannula 13 and the trocar 15 penetrate the skin, 5A) of the trocar main body 15d (when the resistance is applied at one time), the insertion is as easy as that.

The shape of the blade portion 15a may be variously changed and preferably symmetrical with respect to the center axis of the trocar body 15g.

2A, 2B and 2C show various types of blade portions 15a that can be applied to the tip end portion of the trocar body shown in Fig. It is seen from the direction of arrow s in Fig.

Referring to the drawing, it can be seen that the blade portion 15a forms an angle of 90 degrees, 120 degrees, and 180 degrees and is symmetrical with respect to the center axis of the trocar body. The blade portion 15a should be symmetrically formed so that the trocar main body 15d is not deflected sideways when it is advanced in the longitudinal direction.

The knob 15b is a cylindrical member that has a rear end portion of the trocar main body 15d therein and has a female screw hole 15c formed therein with an internal thread. The female screw hole 15c is a portion that receives the engagement holding portion 13c therein and is screwed with the engagement holding portion.

The handle 15b is screwed into the engagement holding portion 13c in a state in which the trocar main body 15d is completely inserted into the guide portion 13a through the introduction portion 13b, (15).

On the other hand, the fish processing needle 17 is composed of a needle body 17a made of stainless steel and a handle 17c fixed to the rear end of the needle body 17a.

Basically the aprojecting needle 17 is inserted into the through passage 13f of the cannula 13 and moves together with the cannula 13 to the final target point so that the distal end of the cannula 13 To reach the point.

The needle main body 17a is a member having the same diameter as the inner diameter of the through passage 13f and is in close contact with the inner peripheral surface of the guide portion 13a while being inserted into the guide portion 13a as shown in Fig.

Particularly, in the distal end portion of the needle main body 17a, a career securing portion 17b is formed. The career securing portion 17b protrudes forward of the distal end portion of the guide portion 13a, and the cannula 13, When the needle (17) combination advances longitudinally in the body, it prevents injury to body tissues, nerves or blood vessels.

The career securing section 17b is a mechanism that moves the nerves and vascular tissues located forward in the advancing direction to the left and right when the cannula 13 and the aprojecting needle 17 are advanced in the body in the longitudinal direction It plays a role. If the blade portion is applied instead of the career securing portion 17b, both nerves and blood vessels will be cut.

The pro-programming needle 17 is replaced with a trocar 15 for secure access to the target point in the vertebrae after the cannula 13 reaches the periphery of the vertebrae with the aid of the trocar 15 . In other words, the trocar 15 is pulled out and the pro-programming needle 17 is inserted in its place.

In any case, the career securing portion 17b takes the shape of a streamline as much as possible so that the career securing portion 17b can perform the above-mentioned role. In the present embodiment, the career securing portion 17b takes the form of a hemisphere.

The knob 17c is a cylindrical member fixed to the rear end of the needle body 17a and has a female screw hole 17d therein. The female screw hole 17d is screwed to the engagement holding portion 13c as a portion having an female thread on the inner peripheral surface thereof.

The catheter 19 is for applying the chemical solution to the target point in a state where the tip of the cannula 13 reaches the target point and is inserted into the guide portion 13a of the cannula 13 and is set. (19a) and a tip portion (19b).

The body portion 19 is formed of a urethane material and is flexible, and its length is at least 1.5 times the length of the cannula 13. The main body 19 has an outer diameter enough to be movable in the longitudinal direction while being fitted in the through-hole 13f. It is a matter of course that a chemical liquid passage (19e in Fig. 3A) is formed inside the body portion 19. [

The tip portion 19b is a portion joined to the front end surface of the main body portion 19 and has a large number of ejection holes 19d in the periphery thereof. The tip portion 19b is made of a soft urethane that is physically softer than the body portion 19.

Particularly, the distal end portion of the tip portion 19b, that is, the opposite end portion of the portion joined to the main body portion 19 is blocked by the tip clogged portion 19c. By applying the tip clogging portion 19c in this way, the chemical liquid is ejected only in the lateral direction of the tip portion 19b.

The inside view of the tip portion 19b is as shown in FIG. 3A.

As shown in Fig. 3A, the tip portion 19b is joined to the body portion 19a to form an integral body, and the opposite side of the joint portion is clogged by the tip clogged portion 19c. In addition, three spray holes 19d are arranged in a line on the periphery of the tip portion 19b.

Therefore, the chemical liquid injected from the outside and introduced through the chemical liquid passage 19e is ejected laterally through the ejection hole 19d. In addition, the total cross-sectional area of the flow of the chemical liquid passing through the spray hole 19d may be designed to be larger than the flow cross-sectional area of the chemical liquid passage 19e. In this way, the kinetic energy of the ejected drug solution can be lowered, thereby reducing the burden caused by the collision with the drug solution in the spinal nerve or tissue.

Particularly, the inner surface of the tip clogged portion 19c, that is, the surface facing the chemical solution passage 19e is a wire contact surface. The wire contact surface 19g is a portion pushed in the direction of the arrow p in contact with the pushing portion 25b formed at the tip of the guide wire 25. [

3B is a perspective view showing another example of the distal end portion of the catheter shown in FIG.

As shown in the figure, a large number of slit-like ejection holes 19f are formed in the periphery of the tip portion 19b. The spray holes 19f take the form of slits extending in parallel to each other and spray the chemical solution around the tip portion 19b to the target point. The spray holes 19f are spaced at regular intervals in the circumferential direction of the tip portion 19b.

FIGS. 4A and 4B are cross-sectional views showing still another example of the distal end portion of the catheter shown in FIG. 1. FIG.

Although the spray holes 19d shown in Fig. 1 are disposed only in one direction of the tip portion 19b, as shown in Figs. 4a and 4b, the spray holes 19d can be arranged in the circumferential direction There is also. It is a matter of course that the chemical liquid can be applied to the catheter 19 in four directions by arranging the spray holes 19d in this manner.

A connector 23 is provided at the rear end of the catheter 19. The connector 23 is a member for holding and fixing the rear end portion of the catheter 19 and has an internal passage 23a therein. The inner passage 23a is a passage for opening the chemical solution passage 19e of the catheter 19 to the adapter portion 23b. Therefore, when the drug solution of the injector 29 is injected into the adapter portion 23b while the spout 29a of the injector 29 is connected, the drug solution passes through the inner passage 23a, And enters the passage 19e.

On the other hand, the guide wire 25 is a tool for inserting the catheter 19 into the through passage 13f of the cannula 13. Since the catheter 19 itself is made of a soft material and can not move in the longitudinal direction while being inserted into the penetrating passageway 13f in friction with the catheter 19, the catheter 19 is inserted and moved by the guide wire 25 .

The guide wire 25 includes a wire main body 25a inserted into the chemical solution passage 19e of the catheter through a connector 23 and a wire main body 25b provided at the rear end of the wire main body 25a and coupled to the adapter portion 23b And a knob 25c.

A pushing portion 25b is formed at the distal end of the guide wire 25. The pushing portion 25b pushes the wire contact face 19g in the direction of the arrow p in a state of being in contact with the wire contact face 19g in the tip portion 19b as shown in Fig.

The handle 25c is a cylindrical member fixed to the rear end of the wire main body 25a and has a female screw hole 25d therein. The female screw hole 25d is engaged with the adapter portion 23b to support the wire main body 25 so as to be retracted from the catheter 19 so as not to come off.

Particularly, the extension length of the wire main body 25a is designed such that the pushing portion 25b contacts the wire contact face 19g at the moment when the knob 25c is engaged with the adapter portion 23b. By coupling the guide wire 25 to the catheter 19, the catheter 19 is supported on the guide wire 25 and becomes stiff. When the distal end portion of the catheter 19 is aligned with the introducing portion 13b in this state and then inserted into the guide portion 13a, the state shown in FIG.

Reference numeral 29 denotes a syringe. The spout 29a of the syringe 29 is screwed to the adapter portion 23b after the guide wire 25 has been removed and injects the chemical solution as shown in Fig.

FIGS. 5A to 5D are views for explaining a chemical solution injecting method using a chemical injector for decompression neuroplasty according to an embodiment of the present invention.

The chemical liquid injecting method according to the present embodiment starts with the first step of preparing the cannula 13.

When the cannula 13 is prepared, as shown in Fig. 5A, the cannula 13 and the trocar 15 are inserted into the empty through-pass 13f of the cannula 13, (15) a second step of inserting the combination into the body.

In particular, as shown in Fig. 5A, the trocar body 15d projects forward from the tip end of the guide portion 13a. That is, not only the blade portion 15a, but also a tip portion of the trocar main body 15d protrudes. The projecting distance C is not more than twice the diameter of the trocar body 15d.

In the second step, a combination of the cannula 13 and the trocar 15 is inserted into the body, and the skin and the subcutaneous fat layer are inserted and inserted just before the vertebra. Of course, depending on the condition of the affected part, it is possible to enter the inside of the spine.

The following third step is a step of removing the trocar 15 from the cannula 13 and emptying the through passage 13f. To this end, it is of course necessary to separate the handle 15b from the engagement holding portion 13c.

The fourth step is to further move the combination of the cannula 13 and the aprocessing needle 17 after inserting and engaging the aprocessing needle 17 into the empty through passage 13f so that the cannula 13 Is brought close to the target point in the body and the pro-machining needle 17 is pulled out.

As shown in Fig. 5B, the route securing portion 17b of the above-described programming needle 17 protrudes forward from the distal end portion of the guide portion 13a. Therefore, when the combination of the cannula 13 and the aprocessing needle 17 is moved in the longitudinal direction, the anterior blood vessels or nerve tissues are opened only to the left and right without damage, and the cannula 13 is advanced.

If the distal end of the cannula 13 is disposed close to the target point through the fourth step, the catheter 19 with the guide wire 25 inserted therein is inserted into the through passage 13f of the cannula 13, , The fifth step of setting the ejection hole 19d to be exposed to the outside of the cannula and then pulling out the guide wire 25 is performed.

As mentioned above, the length of the catheter 19 is at least 1.5 times the length of the cannula 13, so that the connector 23 is completely spaced from the introducing portion 13b. There is no fear that the connector 23 will hit the introduction portion 13b during the procedure.

6D, when the mouth portion 29a of the syringe 29 (containing the chemical liquid) is held in the adapter portion 23b of the connector 23, And a sixth step of feeding. The chemical liquid injected from the injector 29 passes through the internal passageway 23a and the catheter 19 and is ejected to the peripheral target point through the ejection hole 19d.

Once the procedure is completed, the catheter 19 and cannula 13 are removed and the procedure is completed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

11: chemical liquid injector 13: cannula 13a: guide part
13b: introduction part 13c: engagement holding part 13d: stopper
13e: position adjusting tab 13f: penetrating passage 13g: inclined portion
15: Trocar 15a: Knife portion 15b: Knob
15c: female thread 15d: trocar body 17:
17a: Needle body 17b: Path securing portion 17c: Handle
17d: Female thread 19: Catheter 19a:
19b: tip portion 19c: tip clogged portion 19d:
19e: chemical solution passage 19f: spray hole 19g: wire contact surface
23: connector 23a: internal passage 23b:
25: guide wire 25a: wire body 25b: pushing part
25c: handle 25d: female thread 29: syringe
29a:

Claims (7)

A cannula extending in the longitudinal direction and having a through passage so that a part thereof can be inserted into the body;
A trocar which is inserted into the body together with the cannula in a state of being inserted into the through passage of the cannula, and a tip portion protruding outside the cannula is formed at the tip end;
After the cannula and the trocar combination are inserted into the body, the trocar is removed to move to the final target position together with the cannula in a state of being inserted in the through passage of the secured cannula to reach the tip of the cannula An approach needle protruding from the distal end of the cannula in a state of being coupled to the cannula and having a career securing part formed in a streamline shape to prevent damage to the internal tissues when the internal cannula is moved;
The cannula and the approach needle assembly reach the target point, the approach needle is removed and inserted into the through-hole of the secured cannula, and the distal end portion thereof is set so as to protrude to the outside of the cannula, Wherein the ejection hole includes a catheter that is opened in a lateral direction of the distal end portion, wherein the ejection hole includes a catheter that opens in the lateral direction of the distal end portion. The method according to claim 1,
Wherein a connector is provided at the rear end of the catheter, the connector being separated from the cannula so as to guide the drug solution, which is pushed out of the syringe into the catheter by engaging with the spout of the syringe containing the drug solution, A liquid injection device for decompression neuroplasty. 3. The method of claim 2,
The catheter comprising:
A main body portion having a predetermined inner diameter and extending in the longitudinal direction and having a rear end extending to the outside of the cannula,
Wherein the end portion opposite to the end portion joined to the main body portion is clogged with the tip end clogged portion and is composed of a tip portion having the spray hole at its peripheral portion,
The catheter is used to insert the catheter into the penetration passage of the cannula. The catheter is inserted into the catheter through the connector and pushes the tip clogged portion in a state where the distal end thereof reaches the clogged portion. Wherein the guidewire is further provided with a guide wire for guiding the medicament. 3. The method of claim 2,
The cannula comprising:
A cannula body having a predetermined inner diameter and extending in the longitudinal direction,
An introducing portion fixed to a rear end of the cannula body and guiding the cannula body to the cannula body through the trocar or a pro- processing needle or catheter,
The introduction portion includes:
Wherein a stopper is formed to limit the protruding length of the trocar or the prothesis needle relative to the distal end of the cannula main body. 5. The method of claim 4,
A cylindrical knob for providing a female screw hole is fixed to the rear end of the trocar and the pro- processing needle,
Wherein the introduction part further comprises a coupling holding part for holding the relative position of the handle with respect to the stopper by screwing with the handle. The method according to claim 1,
Wherein,
Wherein the tip of the approach needle is formed by machining a tip of the approach needle, and takes the form of a hemispherical shape. A first step of preparing a hollow tubular cannula extending in the longitudinal direction so as to allow a part of the hollow tubular cannula to be inserted into the body and having a through hole having a predetermined inner diameter;
A cannula and a trocar assembly are inserted into the body while the trocar is inserted into the through passage of the cannula, the trocar being extended in the longitudinal direction and having a blade at the tip thereof, so that the cutter is projected to the outside of the cannula A second step;
A third step of removing the trocar from the cannula after the second step and emptying the penetrating passageway;
The cannula and the cannula are connected to each other so as to protrude to the outside of the cannula, wherein the cannula is inserted into the through hole of the cannula, A fourth step of bringing the picking needle closer to the target point in the body and then removing the proching needle;
After completion of the fourth step, a catheter extending in the longitudinal direction and having a blind end and a blast hole formed on the side of the distal end is inserted into the through passage of the canula, and the blind hole is set to be exposed to the outside of the cannula A fifth step;
And a sixth step of injecting a drug solution into the rear end of the catheter to allow the drug solution to pass through the catheter and to be sprayed onto the target point through the spray hole.
KR1020150110828A 2015-08-06 2015-08-06 Medical fluid injection device for neuroplasty and Method for injecting the medical fluid KR20170018159A (en)

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KR1020150110828A KR20170018159A (en) 2015-08-06 2015-08-06 Medical fluid injection device for neuroplasty and Method for injecting the medical fluid

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111375121A (en) * 2020-03-18 2020-07-07 南京鼓楼医院 Novel nerve block sleeve assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111375121A (en) * 2020-03-18 2020-07-07 南京鼓楼医院 Novel nerve block sleeve assembly
CN111375121B (en) * 2020-03-18 2022-05-17 南京鼓楼医院 Nerve block sleeve assembly

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