KR20200049258A - Injection snare for tissue lesions resection with multiple tips - Google Patents

Abstract

The present invention relates to a medical snare for endoscopic mucosal resection, which comprises a needle to infiltrate under the mucous membrane of a lesion tissue and inject a liquid to swell the tissue; a ring-shaped resection part for resecting the swollen lesion tissue by applying high frequency; a handle part for manipulating discharge of the needle or the resecting part; a wire part having one end connected to the resecting part to advance and retreat the resecting part; and a gear part engaged with the handle part in a tooth shape to advance and retreat the needle, wherein the resecting part and the needle can be alternately discharged.

Description

  Medical snare for removing lesion tissue that can be used with multiple treatment devices {INJECTION SNARE FOR TISSUE LESIONS RESECTION WITH MULTIPLE TIPS}

The present invention relates to a medical snare used in a procedure for removing a portion of tissue inside the body.

Colorectal cancer is one of the most common malignant tumors in western society and has a high incidence with a second frequency in western society. In Korea, diseases related to colorectal cancer have significantly increased in recent years due to changes in dietary habits, development of endoscopy, and regular health check-ups. Malignant changes of colon polyps among colon lesions are influenced by various factors such as size, histological classification, and adenomatous form. For this reason, it is important for the detection of colon polyps and their removal and follow-up to prevent colon cancer. can do. Among the colon polyps, adenomas are progenitors of colorectal cancer, and if the adenomas are found and removed, the frequency of colorectal cancer is significantly lowered.

During polypsectomy, injection assisted polypectomy after submucosal injection is a method to remove sessile or flat lesions of 20 mm or less. The biggest advantage of submucosal injection can be to prevent perforation caused by electrocautery.

The advantage of using a submucosal injection in basic polypectomy is that, first, normal tissues and lesions are clearly distinguished and can be walked while securing sufficient margin when walking the noose. Second, the lesion is swollen in front of the end of the endoscope by sufficiently injecting the submucosal solution from the oral side of the polyp from the invisible part of the polyp, if it is present in the flexion of the large intestine or when the polyp is partially observed in the field of view. You can easily hang the noose.

It is important that such a lasso is designed to perform the treatment with one insertion. Therefore, it is preferable that the needle for injecting saline, drug, etc. into the lasso is formed with the electrode to which high frequency is applied, but the structure of the snare so that the snare can be simultaneously replaced with the structure where the lasso and the needle are disposed together. It is not easy.

More specifically, resection of the lesion tissue requires work to swell the lesion tissue before performing. To this end, the medical practitioner confirmed the position of the lesion with an endoscope, inserted a needle to inject a liquid for swelling the lesion tissue, removed the endoscope from which the needle was connected from the body, and inserted a noose to perform resection. That is, there is a problem in that the endoscope needs to be alternately inserted as the needle and the noose for the injection of chemical solution or tissue swelling are separated during the procedure. The process of alternately inserting a treatment tool when performing lesion tissue resection can place a burden on the medical worker, and also increases the treatment time.

In this regard, there is Korean Patent No. 1328473 (hereinafter abbreviated as 'prior patent') as a conventional technique in which a plurality of treatment devices are used in combination. The prior patent discloses a medical catheter incorporating an injection needle and an insulating knife and a treatment tool of an insulating knife. Although the prior patent incorporated a plurality of treatment tools related to the ESD knife, an embodiment in which a treatment tool of snare (noose) was incorporated was not disclosed.

Unlike ESD knives, in order to implement two types of needles and snares on one handpiece, the control mechanism of the driving range must be considered. As the snare is discharged from the catheter tube and is drawn into the catheter tube, the diameter of the noose ring is reduced to ablate the polyp. On the other hand, only the pointed end for insertion into the polyp is exposed from the catheter tube. Considering the driving range of these two treatment tools, there is a need for an operation mechanism in which the driving range of the discharge and inlet of the snare is significantly larger than the discharge and intake of the needle.

Accordingly, the present applicant does not simply merge two types of needles and snares in consideration of the above mechanism, but implements two types of tools on one handpiece and snares or needles with one handle operation. Invented a medical snare that can be manipulated.

Korean Registered Patent No. 1328473

The present invention is to provide a snare and medical snare for medical needle infusion needle treatment on one handpiece.

In addition, the present invention is to provide a medical snare capable of adjusting the needle and snare, which are two kinds of treatment devices, by operating one handle.

In addition, the present invention is to provide a medical snare having a mechanism having a larger driving range of the needle and snare than the driving range of the handle.

In order to achieve the above object, the present invention provides a medical snare for endoscopic mucosal resection, a needle that infiltrates under the mucous membrane of a lesion tissue and injects a liquid to swell the tissue; A ring-shaped ablation unit for excision of the swollen lesion tissue by applying high frequency; A handle portion for discharging the needle or the ablation portion; A wire portion having one end connected to the ablation portion to advance and retreat the ablation portion; And a gear part engaged with the handle part in a tooth shape to advance and retreat the needle, wherein the ablation part and the needle can be alternately discharged.

Preferably, the handle portion is a fixed handle; And an operation handle for pushing or pulling the wire portion while driving the gear portion, and the operation handle relatively moved from the fixing handle can alternately discharge the ablation portion or the needle.

Preferably, the operation handle may be formed with a guide groove for accommodating a proximal portion so that the wire portion is slidable.

Preferably, the other end of the wire portion is fixed to the power connection portion located in front of the manipulation handle, and the proximal end may be connected to the ablation part via the manipulation handle in a “c” shape.

Preferably, the gear portion is a pinion gear that is rotated by the external force of the handle portion; And a rack gear driven in the longitudinal direction by receiving the rotational force of the pinion gear, and including the rack gear in which the needle is fixed, the needle may be moved back and forth according to the driving direction of the rack gear.

Preferably, the gear portion and the wire portion may increase the second driving range in which the needle and the ablation portion move complementarily than the first driving range in which the handle portion is physically manipulated and moved by the user.

Preferably, the medical snare according to the present invention further includes a power connection portion to which a jack for supplying electric power to the ablation portion is connected, and the power connection portion is fixedly coupled to the gear portion so as to move back and forth when the gear portion is driven.

Preferably, the gear portion is a pinion gear that is rotated by the external force of the handle portion; And a rack gear that is driven in the longitudinal direction by receiving the rotational force of the pinion gear, and the needle is fixed, and the power connection unit may be fixedly coupled to the rack gear.

Preferably, the gear part and the wire part have a larger second driving range in which the needle and the ablation part move complementarily than the first driving range in which the handle part is physically manipulated and moved by the user, and the power connection part is the Located in front of the handle portion, the other end of the wire portion is fixed, and the third drive range in which the power connection unit moves by the manipulation of the handle portion extends the second drive range to extend the drive range of the wire portion and the gear portion. I can do it.

According to the present invention, when operating the handle portion, the wire portion and the gear portion respectively drive the ablation portion and the needle, and there is an advantage that two kinds of treatment devices can be used on one handpiece.

In addition, according to the present invention, as the operation handle and the gear part engage, and as the wire part is disposed via the inside of the operation handle, as the control configuration of one operation handle advances and falls, two types of treatments, the ablation part and the needle can be alternately discharged. have.

In addition, according to the present invention, it is possible to operate such that the discharge and inlet driving ranges of the needles and the ablation portions of the two treatment tools have a larger mechanism than the driving range in which the medical worker physically manipulates the operation handle.

In addition, according to the present invention, it is possible to shorten the treatment time by inserting a single endoscope when performing a resection of the lesion tissue, and has the advantage of minimizing the burden on the medical worker.

1 shows a perspective view of a medical snare according to an embodiment of the present invention.
Figure 2 shows an internal cross-section of a medical snare according to an embodiment of the present invention.
Figure 3 shows the driving state of the medical snare according to an embodiment of the present invention.
4 is a view for explaining the driving range of the medical snare according to an embodiment of the present invention.
5 shows a medical snare according to another embodiment of the present invention.
6 is a view for explaining the driving range of the medical snare according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the contents described in the accompanying drawings. However, the present invention is not limited or limited by the exemplary embodiments. The same reference numerals in each drawing denote members that perform substantially the same function.

The objects and effects of the present invention may be naturally understood or more apparent by the following description, and the objects and effects of the present invention are not limited only by the following description. In addition, in the description of the present invention, when it is determined that the detailed description of the known technology related to the present invention may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

1 shows a perspective view of a medical snare 1 according to an embodiment of the present invention.

Referring to Figure 1, the medical snare (1) is a body 90, a needle 10, a chemical injection port 20, the ablation portion 30, the handle portion 50, the tube 80, the wire portion 40 And a gear part 60.

The body 90 means a catheter body having a predetermined length. The body 90 is configured with a handle 50 to be operated by a medical worker at a rear end. The body 90 is formed with a power supply connection 70 for applying high frequency to the proximal portion. The body 90 is formed with a chemical injection port 20 in communication with the needle 10 proximal. A tube 80 inserted into the body is provided at the front end of the body 90. In the medical snare 1 according to the present embodiment, two types of treatment devices, the needle 10 and the ablation part 30, are accommodated in the tube 80.

The needle 10 infiltrates under the mucous membrane of the lesion tissue and injects a liquid to swell the tissue. The needle 10 is complementarily driven with the ablation part 30 and directly invades the lesion tissue and is injected into the needle end portion 11 (see FIG. 2) and the chemical injection port 20 that are sharply discharged at one end of the tube 80. It may be composed of a needle tube (13, see Fig. 2) for guiding the liquid to the needle end (11, see Fig. 2).

The ablation part 30 means a ring-shaped noose that excises swollen lesion tissue by applying high frequency. The diameter of the noose can be adjusted depending on the size of the polyp or the treatment environment. Resection 30 is a configuration that can be alternately discharged with the needle (10). When the ablation part 30 is pulled from the handle part 50, the circular rim is tightened by the tube 80, shown in FIG. 1, thereby enclosing the circumferential surface of the polyp, thereby applying the polyp to which the high frequency current has been applied. Temperance.

2 shows an internal cross-section of a medical snare 1 according to an embodiment of the invention. Referring to FIG. 2, it is possible to understand the detailed configuration and mechanism of the handle part 50, the gear part 60, and the wire part 40.

The handle portion 50 is configured to manipulate the discharge of the needle 10 or the ablation portion 30. The handle portion 50 according to the present embodiment alternately discharges the needle 10 and the ablation portion 30 with only one advance or retraction without a plurality of handles driving the needle 10 and the ablation portion 30, respectively. Can be. The handle portion 50 according to this embodiment is illustrated as a structure having a ring shape that can be gripped.

The handle portion 50 may include a fixed handle 501 and an operation handle 503.

The fixing handle 501 may be formed at the rear end of the body 90. The fixed handle 501 refers to a fixed configuration that is not moved among the configurations of the handle unit 50 to be operated by the user by hand.

The operation handle 503 is configured to push or pull the wire portion 40 while driving the gear portion 60. The operation handle 503 may alternately discharge the ablation part 30 or the needle 10 as it is relatively moved from the fixed handle 501. The operation handle 503 may be formed with a guide groove 5031 that accommodates a proximal portion so that the wire portion 40 is slidable. The operation handle 503 may be formed with teeth that are tooth-shaped coupled to the gear portion 60 inside the guide groove 5031.

The guide groove 5031 means a groove in which the wire part 40 is accommodated by enclosing the inside of the operation handle 503. The operation handle 503 according to this embodiment drives both the gear part 60 and the wire part 40 complementarily. Here, the wire portion 40 may be structurally designed outside the gear portion 60 without being directly fixedly coupled to the operation handle 503. The operation handle 503 is formed with a tooth engaged with a gear part 60 to be described later in some of the inner upper and lower ends, and a guide groove 5031 is formed outside the tooth.

The power connection unit 70 may be connected to a jack that supplies power to the ablation unit 30. The other end of the wire part 40 is fixed to the power connection part 70, and the power connection part 70 may supply power to the ablation part 30 through the wire part 40. In this embodiment, the power connector 70 is disposed in front of the operation handle 503. In addition, in the medical snare 1 according to the embodiment of FIG. 2, a power connection unit 70 is formed in the main body. This is in contrast to the medical snare according to the embodiment of FIGS. 5 and 6 to be described later (the power connection portion 70 is formed on the gear portion 60 in 1 '.

The other end of the wire portion 40 is fixed to the power connection portion 70 positioned in front of the operation handle 503. The wire portion 40 may have one end connected to the ablation portion 30 via the proximal portion of the manipulation handle 503 in a “c” shape. The wire portion 40 may be connected to one end of the ablation portion 30 to advance and retreat the ablation portion 30. The wire portion 40 may be composed of an insulating coating 43 and a wire wire 41. The wire wire 41 shown in FIG. 2 is made of a conductive material, and transmits electric power to the ablation unit 30 through the power connection unit 70.

The wire portion 40 includes an insulating coating 43 surrounding the wire wire 41 to insulate the wire wire 41. The insulating coating 43 need not be formed to enclose the entire wire wire 41, and may be provided to enclose the wire wire 41 in the proximal region of the body 90 on which the driving mechanism is performed.

The gear part 60 may mesh with the handle part 50 in a tooth shape to advance and retreat the needle 10. The gear part 60 may include a pinion gear 61, a rack gear 63 and a rack cylinder 65.

Pinion gear 61 is rotated by the external force of the handle portion 50. The pinion gear 61 serves to transmit the rotational motion rotated by the external force of the handle part 50 as a horizontal motion to the rack gear 63. According to the present embodiment, the pinion gear 61 is meshed with a tooth formed in the operation handle 503.

The rack gear 63 is driven in the longitudinal direction by receiving the rotational force of the pinion gear 61. The needle 10 may be fixed to the rack gear 63. As the needle 10 is fixedly coupled to the rack gear 63, the needle 10 may move back and forth according to the driving direction of the rack gear 63.

The rack cylinder 65 shown in FIG. 2 refers to an area in which the front end of the rack gear 63 is extended, and the needle 10 is fixedly coupled to the rack cylinder 65.

3 shows a driving state of the medical snare 1 according to the embodiment of the present invention.

3, the driving mechanism of the wire part 40 and the gear part 60 will be described. FIG. 3 (a) shows the driving for retracting the ablation unit 30 and discharging the needle 10, and FIG. 3 (b) discharges the ablation unit 30 and retracting the needle 10. It shows driving.

According to the present embodiment, the handle portion 50 guides the wire portion 40 by applying pressure after the user grips the fixing handle 501 with a thumb and grips the operation handle 503 with a finger except the thumb. It is configured to push and pull along the groove 5031.

Referring to (a) of FIG. 3, when the user retracts the operation handle 503, the pinion gear 61 toothedly coupled to the operation handle 503 is rotated counterclockwise. When the pinion gear 61 is rotated in the counterclockwise direction, the rack gear 63 toothedly coupled with the pinion gear 61 is advanced in the front end direction of the body 90. The needle 10 is discharged out of the tube 80 as the rack gear 63 is advanced. On the other hand, when the operation handle 503 is retracted, the other end of the wire portion 40 passing through the inside of the operation handle 503 in a 'c' shape is fixed to the power connection portion 70, so that the wire portion 40 is a guide groove. It is pushed in the direction of the rear end of the body 90 along (5031). As the wire portion 40 is retracted in the rear end direction of the body 90, the ablation portion 30 may be retreated inside the tube.

Referring to (b) of FIG. 3, when the user advances the operation handle 503, the pinion gear 61 toothedly coupled to the operation handle 503 is rotated clockwise. When the pinion gear 61 is rotated in the clockwise direction, the pinion gear 61 and the rack gear 63 coupled with the teeth are retracted in the rear end direction of the body 90. The needle 10 is retracted to the inside of the tube 80 as the rack gear 63 is retracted. On the other hand, the other end of the wire portion 40 that passes through the inside of the operation handle 503 in an 'c' shape when the operation handle 503 is advanced is fixed to the power connection portion 70, so that the wire portion 40 is a guide groove. It is pushed along the (5031) in the direction of the tip of the body (90). As the wire part 40 is advanced in the front end direction of the body 90, the ablation part 30 may be discharged out of the tube 80.

4 is a view for explaining a driving range of the medical snare 1 according to an embodiment of the present invention. In FIG. 4, it will be described that the driving ranges of the ablation unit 30 and the needle 10 are amplified so that discharge of different treatment tools is possible even in a limited driving area of the handle unit 50.

In the gear portion 60 and the wire portion 40 according to the present embodiment, the needle 10 and the ablation portion 30 are complementary to the first driving range in which the handle portion 50 is physically manipulated and moved by the user. The second driving range moved by can be increased.

FIG. 4 (a) shows a state in which the operation handle 503 is advanced to describe the first driving range, and FIG. 4 (b) shows the operation handle 503 being retracted to explain the second driving range. It shows the appearance.

Referring to (a) of FIG. 4, a driving range in which the manipulation handle 503 is physically manipulated and moved by the user may be represented by the length of D1. In this embodiment, the first driving range, which is the length that the operation handle 503 is physically operated and moved, may be D1.

Referring to (b) of FIG. 4, the driving range in which the wire portion 40 is pulled by the retraction of the operation handle 503 may be represented by the length of D2. In addition, as the operation handle 503 is retracted, the driving range in which the rack gear 63 is advanced may be represented by the length of D3. In the present embodiment, the second driving range in which the needle 10 and the ablation part 30 complementarily move may be D2 + D3.

In summary, in Fig. 4 (a) and (b), the first driving range D1 of the operation handle 503 is approximately the same as the driving distance D2 of the ablation part 30 and the driving distance D3 of the rack gear 63. Do. When the user operates the operation handle 503 by the length of D1, the second pulling the ablation section 30 and discharging the needle 10 (or discharging the ablation section 30 and pulling the needle 10) The driving range is about 2xD1. As a result, the second driving range may be about twice the first driving range.

Medical snare (1) according to this embodiment is a needle (10) of two types of treatment by physically operating one operation handle (503) through the mechanism of the gear portion 60 and the wire portion 40 as described above And implements a mechanism having a large discharge and inlet driving range of the ablation section (30).

5 shows a driving state of the medical snare 1 'according to another embodiment of the present invention.

It will be described through FIG. 5 that the driving mechanism of the wire part 40 and the gear part 60 can be extended through the power connection part 70. Figure 5 (a) shows a drive for retracting the cutting portion 30 and discharging the needle 10, Figure 5 (b) shows the cutting portion 30 and the needle 10 inside the tube 80 It shows the ready state of the retracted drive, Figure 5 (c) shows a drive for discharging the ablation portion 30 and retracting the needle (10).

Unlike the medical snare 1 which is the embodiment of FIGS. 3 and 4, in another embodiment of the medical snare 1 ′ of FIG. 5, the power connection part 70 is fixedly coupled to the gear part 60, so that the gear part 60 is It can move back and forth when driving. The power connection part 70 is disposed in front of the operation handle 503. Referring to FIG. 5, the power connection unit 70 may be fixedly coupled to the rack gear 63.

According to the present embodiment, the handle portion 50 guides the wire portion 40 by applying pressure after the user grips the fixing handle 501 with a thumb and grips the operation handle 503 with a finger except the thumb. It is configured to push and pull along the groove 5031.

Referring to (a) of FIG. 5, when the user retracts the operation handle 503, the pinion gear 61 toothedly coupled to the operation handle 503 is rotated counterclockwise. When the pinion gear 61 is rotated in the counterclockwise direction, the rack gear 63 toothedly coupled with the pinion gear 61 is advanced in the front end direction of the body 90. As the rack gear 63 is advanced, the power connection unit 70 is also advanced in the direction of the front end of the body 90, and the needle 10 is discharged out of the tube 80. On the other hand, when the operation handle 503 is retracted, the other end of the wire portion 40 passing through the inside of the operation handle 503 in a 'c' shape is fixed to the power connection portion 70, so that the wire portion 40 is a guide groove. It is pushed in the direction of the rear end of the body 90 along (5031). As the wire portion 40 is retracted in the rear end direction of the body 90, the ablation portion 30 may be retreated inside the tube 80.

Referring to (b) of FIG. 5, when the user advances the operation handle 503, the pinion gear 61 toothedly coupled to the operation handle 503 is rotated clockwise. When the pinion gear 61 is rotated in the clockwise direction, the rack gear 63 toothedly coupled with the pinion gear 61 is retracted in the rear end direction of the main body 90. As the rack gear 63 is retracted, the power connection unit 70 is also retracted in the rear end direction of the main body 90, and the needle 10 is retracted to the inside of the tube 80. On the other hand, the other end of the wire portion 40 that passes through the inside of the operation handle 503 in an 'c' shape when the operation handle 503 is advanced is fixed to the power connection portion 70, so that the wire portion 40 is a guide groove. It is pushed along the (5031) in the direction of the front end of the body (90). When the wire portion 40 is not sufficiently driven to move forward in the front end direction of the main body 90, the ablation portion 30 may be ready to be driven without being discharged out of the tube 80.

Referring to (c) of FIG. 5, when the user advances the operation handle 503, the pinion gear 61 toothedly coupled to the operation handle 503 is rotated clockwise. When the pinion gear 61 is rotated in the clockwise direction, the rack gear 63 toothedly coupled with the pinion gear 61 is retracted in the rear end direction of the main body 90. As the rack gear 63 is retracted, the power connection unit 70 is also retracted in the rear end direction of the main body 90, and the needle 10 is retracted to the inside of the tube 80. On the other hand, the other end of the wire portion 40 that passes through the inside of the operation handle 503 in an 'c' shape when the operation handle 503 is advanced is fixed to the power connection portion 70, so that the wire portion 40 is a guide groove. It is pushed along the (5031) in the direction of the front end of the body (90). As the wire part 40 is advanced in the front end direction of the main body 90, the ablation part 30 may be discharged out of the tube 80.

6 is a view for explaining a driving range of the medical snare 1 'according to another embodiment of the present invention. In FIG. 6, discharge of different treatment tools is possible even in the limited driving region of the handle part 50 and the driving range of the ablation part 30 and the needle 10 through the driving mechanism of the gear part 60 and the power connection part 70 is shown. Explain that is amplified further.

Gear portion 60 and the wire portion 40 according to another embodiment of the present invention, the needle 10 and the ablation portion 30 than the first driving range in which the handle portion 50 is physically manipulated and moved from the user The second driving range in which the complementary motion is increased is enlarged, and the power connection part 70 is located in front of the handle part 50 and is fixed to the other end of the wire part 40, and the power is operated by operating the handle part 50. The third driving range in which the connecting unit 70 moves may expand the driving range of the wire unit 40 and the gear unit 60 by extending the second driving range.

6 (a) shows a state in which the operation handle 503 is advanced to describe the first driving range, and FIG. 6 (b) shows the operation handle (in order to explain the second driving range and the third driving range) 503) is retracted, and the power connection portion 70 shows a state in which the main body 90 is advanced.

Referring to (a) of FIG. 6, the driving range in which the manipulation handle 503 is physically manipulated and moved by the user may be represented by the length of D1. In this embodiment, the first driving range, which is the length that the operation handle 503 is physically operated and moved, may be D1.

Referring to (b) of FIG. 6, the driving range in which the wire part 40 is pulled by the retraction of the operation handle 503 may be represented by the length of D2. With the retraction of the operation handle 503, the driving range in which the rack gear 63 is advanced may be represented by the length of D3. In addition, the driving range in which the power connection unit 70 moves substantially the same as the driving range of the rack gear 63 in the front end direction of the main body 90 may be represented by the length of D4. In the present embodiment, the second driving range in which the needle 10 and the ablation part 30 complementarily move may be D2 + D3. The third driving range in which the power connection unit is moved by the physically manipulated handle unit 50 may be D4.

In summary, in Fig. 6 (a) and (b), the first driving range D1 of the operation handle 503 is the driving distance D2 of the ablation unit 30, the driving distance D3 of the rack gear 63, and the power connection unit ( It is roughly the same as the driving distance D4 of 70). When the user operates the operation handle 503 by the length of D1, pulls the ablation unit 30, discharges the needle 10, and advances the power connection unit 70 to the front end of the main body 90 (or the ablation unit 30 ) Is discharged, the needle 10 is pulled, and the second driving range for retracting the power connection portion 70 to the rear end of the main body 90 is about 2xD1 + D4. Here, since the driving ranges of D1, D2, D3, and D4 are approximately the same, 2xD1 + D4 can be regarded as 3xD1. As a result, the second driving range may be about three times the first driving range.

Medical snare (1 ') according to this other embodiment is physically operating one operation handle 503 through the mechanism of the gear portion 60 and the wire portion 40 and the power connection portion 70 as described above 2 Implement a mechanism to extend the discharge and inlet driving range of the needle 10 and the ablation part 30, which are the treatment instruments of the species.

Although the present invention has been described in detail through exemplary embodiments above, those skilled in the art to which the present invention pertains understand that various modifications are possible within the limits of the embodiments described above without departing from the scope of the present invention. will be. Therefore, the scope of rights of the present invention should not be limited to the described embodiments, but should be determined by any modified or modified form derived from the claims and equivalent concepts as well as the claims described below.

1: Medical snare 10: Needle
11: Needle end 13: Needle tube
20: chemical injection port 30: ablation
40: wire part 41: wire wire
43: insulating coating 50: handle
501: fixed handle 503: operating handle
5031: guide groove 60: gear unit
61: pinion gear 63: rack gear
65: cylinder 70: power connection
80: tube 90: body

Claims (9)

In the medical snare for endoscopic mucosal resection,
A needle that infiltrates under the mucous membrane of the lesion tissue and injects a liquid to swell the tissue;
A ring-shaped ablation unit for excision of the swollen lesion tissue by applying high frequency;
A handle portion for discharging the needle or the ablation portion;
A wire portion having one end connected to the ablation portion to advance and retreat the ablation portion; And
Including a gear portion for engaging the handle portion and the teeth to move the needle back and forth,
Medical snare, characterized in that the ablation portion and the needle can be discharged alternately.
According to claim 1,
The handle portion,
Fixed handle; And
It includes an operation handle for pushing or pulling the wire portion while driving the gear portion,
Medical snare, characterized in that the operation handle is moved relative to the fixed handle to discharge the ablation portion or the needle alternately.
According to claim 2,
The operation handle,
A medical snare, characterized in that a guide groove is formed to accommodate the proximal portion so that the wire portion is slidable.
According to claim 2,
The wire portion,
The other end is fixed to the power connection located in front of the operation handle,
Medical snare, characterized in that the proximal end is connected to the ablation part via the manipulation handle in a “c” shape.
According to claim 1,
The gear portion,
A pinion gear rotated by an external force of the handle portion; And
Driven in the longitudinal direction by receiving the rotational force of the pinion gear, including the rack gear is fixed to the needle,
Medical snare, characterized in that the needle moves forward and backward according to the driving direction of the rack gear.
According to claim 1,
The gear portion and the wire portion,
A medical snare, characterized in that the second driving range in which the needle and the ablation unit move complementarily is larger than the first driving range in which the handle is physically manipulated and moved by the user.
According to claim 1,
Further comprising a power connection to which the jack for supplying power to the ablation portion is connected,
The power connection,
Medical snare, characterized in that fixedly coupled to the gear portion to move back and forth when driving the gear portion.
The method of claim 7,
The gear portion,
A pinion gear rotated by an external force of the handle portion; And
Driven in the longitudinal direction by receiving the rotational force of the pinion gear, and includes a rack gear fixed to the needle,
The power connection,
Medical snare, characterized in that fixed to the rack gear.
The method of claim 7,
The gear portion and the wire portion,
The second driving range in which the needle and the ablation unit move complementarily is larger than the first driving range in which the handle is physically manipulated and moved by the user.
The power connection,
Located in front of the handle portion and fixed to the other end of the wire portion,
The third driving range in which the power connection unit is moved by the operation of the handle unit extends the second driving range to expand the driving range of the wire unit and the gear unit.

Images