CN217366012U - Snare with injection function - Google Patents

Abstract

The utility model relates to the technical field of medical instruments and discloses a snare with an injection function, which comprises a main body, wherein a snare finger ring is arranged on the main body in a sliding manner, a double-cavity sheath tube is arranged at one end of the main body, and an injection joint is arranged at the other end of the main body; one end of the main body is provided with a ring tube with an axial through hole, the injection joint is slidably arranged in the axial through hole, the injection joint is provided with an axial block, the axial block is provided with a first notch, the ring tube is provided with a vertical through hole penetrating through the axial through hole, the vertical through hole is slidably provided with a reset clamping column, the reset clamping column is provided with a first clamping block and a second clamping block, a second notch is formed between the first clamping block and the second clamping block, one side of the first clamping block, which is close to the second clamping block, is in sliding contact with the axial block, one end of the reset clamping column is fixedly provided with a key, and a first elastic element is arranged between the key and the ring tube; and a second elastic piece is arranged between the injection joint and the axial through hole. The utility model discloses can one-hand operation, operate simple and convenient more, swift.

Description

Snare with injection function

Technical Field

The utility model relates to the technical field of medical equipment, especially, relate to a snare of area injection function.

Background

With the widespread development of endoscopic therapy, endoscopic EMR is becoming more popular. EMR (endoscopic mucosal dissection) is an endoscopic operation technique which separates flat and raised lesions (early gastrointestinal cancer and flat adenoma) and broad-based sessile polyps from inherent layers thereof by endoscopic measures (injection and suction) to form false pedicle polyps, and then peels off the mucous membrane where the lesion is located by utilizing a snare or electroscission technique to achieve the purpose of treatment or biopsy of large tissues to assist diagnosis.

In the conventional operation, a doctor needs to firstly enter a cavity of a human body through an endoscope and inject (physiological saline or other liquid) under a diseased tissue part to enable the diseased tissue to bulge. Then the injection needle is withdrawn from the endoscope, and the snare enters the body cavity through the endoscope, and snares and peels the raised lesion tissue. Some patients have multiple polyps in the alimentary canal to be cut off, which can cause the injection needle and the snare to frequently and alternately enter and exit the endoscope, the operation time is prolonged in the intangible process of replacing instruments, the workload of medical care personnel is increased, and the operation risk is increased.

In the prior art, the patent with the publication number of CN208404758U, which is applied by the applicant, discloses a snare with an injection needle, comprising a handle, a finger ring, an electrode holder, an injection tube, a snare head, a pull wire, an injection needle, a flow guide tube and a double-cavity sheath tube, wherein the finger ring is slidably connected with the handle, the pull wire is arranged in the double-cavity sheath tube in a penetrating manner, the proximal end of the pull wire is connected with the finger ring, the distal end of the pull wire is connected with the snare head, the flow guide tube is arranged in the double-cavity sheath tube in a penetrating manner, the proximal end of the flow guide tube is connected with the injection tube, the distal end of the flow guide tube is connected with the injection needle, the injection tube is slidably connected with the handle, a push block is fixed on the injection tube, the injection tube and the push block slide along a second chute on the handle, and the proximal end of the double-cavity sheath tube is connected with the handle through an end cap.

This scheme will inject needle and snare setting and at same root sheath pipe, has avoided the loaded down with trivial details of repeated business turn over pincers way, and unites two into one with injection needle and snare handle, has increased the convenience of operation, improves operation efficiency, but still has following problem: when the needle is taken out, the medical staff needs to hold the handle with one hand and push the fixed push block with the other hand, and the injection needle is pushed out by the fixed push block, so that the operation is troublesome.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a snare of area injection function, can one-hand operation, the operation is got up more simple convenient, swift.

The utility model discloses an above-mentioned technical problem is solved to following technical means:

a snare with an injection function comprises a main body, wherein the main body is of a hollow structure, a snare finger ring is slidably arranged on the main body, one end of the main body is fixedly connected with a double-cavity sheath tube, the other end of the main body is provided with an injection joint, an injection needle assembly is arranged in one cavity tube of the double-cavity sheath tube, a snare assembly is arranged in the other cavity tube of the double-cavity sheath tube, the snare assembly is electrically connected with an electrode holder, the snare assembly is in linkage connection with the snare finger ring, and the injection needle assembly is communicated with the injection joint; the injection joint is provided with an axial block, the axial block is provided with a first notch, the ring pipe is provided with a vertical through hole penetrating through the axial through hole, a reset clamping column is arranged in the vertical through hole in a sliding manner, the reset clamping column is provided with a first clamping block and a second clamping block which are arranged on the same straight line, a second notch is formed between the first clamping block and the second clamping block, one side of the first clamping block, which is close to the second clamping block, is in sliding contact with the axial block, one end of the reset clamping column is fixedly connected with a key, and a first elastic element is arranged between the key and the ring pipe; and a second elastic piece is arranged between the injection joint and the axial through hole.

Furthermore, a first sliding groove and a second sliding groove are formed in the side wall of the main body, the snare loop comprises a sliding cylinder, and a first sliding block and a second sliding block which are arranged in the first sliding groove and the second sliding groove in a sliding mode are arranged on the inner wall of the sliding cylinder. So, the slide cartridge is through the gliding setting of first slider in first spout, and the gliding setting of second slider is in the second spout to realize the stable slip of slide cartridge in the main part.

Further, the side of slide cartridge is provided with the wedge groove, the afterbody in wedge groove is provided with the draw-in groove, the one end fixedly connected with ring buckle that the button was kept away from to the card post that resets, the afterbody of ring buckle be provided with draw-in groove complex dop. When only a needle needs to be ejected, the ring of the snare is slid towards the tail part, so that the clamping head on the ring clamping buckle is just clamped in the clamping groove at the tail part of the wedge-shaped groove, and the ring of the snare is fixed, and therefore, when the needle is ejected, the phenomenon that the snare head goes out to influence the injection due to the movement of the ring of the snare is avoided; when the needle is retracted and the key is pressed down, the reset clamping column drives the ring buckle to move downwards, so that the purpose of tripping can be achieved.

Furthermore, the finger ring pipe is provided with a blind hole perpendicular to the axial through hole of the finger ring pipe, the first elastic element is a first spring, one side of the key close to the finger ring pipe is provided with a positioning column, one end of the first spring is sleeved on the positioning column, and the other end of the first spring is abutted against the bottom of the blind hole. When pressing the button down, reference column and blind hole can be fixed the both ends of first spring, prevent when the shrink, and first spring takes place the skew to realize that the button is vertical steadily to press and play on.

Furthermore, the number of the blind holes, the number of the first springs and the number of the positioning columns are two, the two positioning columns are symmetrically arranged on two sides of the reset clamping column respectively, the two first springs are sleeved on the two positioning columns respectively, and the two first springs are arranged in the two blind holes respectively. The two symmetrical positioning columns are arranged, so that the keys cannot deviate when being pressed down and popped up, and the keys can be pressed more smoothly.

Further, the injection needle assembly comprises an injection needle head and a flow guide pipe, and the flow guide pipe is communicated between the injection joint and the injection needle head; the snare assembly comprises a snare head and a pull wire, the pull wire is fixedly connected between the snare head and the ring of the snare device, and the pull wire is electrically connected with the electrode holder. The injection joint is externally connected with an external injector, and the injection is injected into the lesion tissue part from the injection needle through the injection joint and the flow guide pipe in sequence; when the ring of the snare is slid, the snare head is controlled to enter and exit from the double-cavity sheath tube through the old traction wire.

Further, the electrode holder is arranged on a ring of the snare device, and the ring of the snare device is a ring of the double snare device. The double-snare finger ring is characterized in that two sides of the sliding cylinder are respectively provided with one finger ring, and the two sides of the sliding cylinder are respectively provided with the finger ring, so that when the double-snare finger ring is used, the index finger and the middle finger of a medical worker can be respectively placed into the two finger rings, the clamping and fixing of the whole snare are more stable, and the stability of operation is facilitated; the motor is arranged on the ring of the snare so as to facilitate the operation.

Further, the main body and the ring pipe are integrally formed, the hollow structure of the main body is communicated with the axial through hole of the ring pipe, a stepped hole is formed at the position of the hollow structure of the main body and the through hole, the second elastic piece is a second spring, one end of the second spring abuts against the stepped hole, and the other end of the second spring abuts against the injection connector. When pushing the injection joint, the second spring is compressed, and when the injection joint needs to be withdrawn, the reset force of the second spring can drive the injection joint to reset.

Furthermore, a thumb ring is arranged on the ring tube. When the ring discharging sleeve is used, the thumb of the medical staff can be put into the thumb ring, so that the operation is convenient.

The utility model has the advantages that:

1. the utility model discloses with injection and snare integration on a snare, during the use, can put into two finger rings of double ring snare ring respectively with forefinger and well finger, the button can be pressed to the thumb, perhaps promotes the injection and connects, perhaps puts into the internal fixed main part of thumb ring, can one-hand operation during whole injection or snare, operates more simple and convenient.

2. The utility model discloses when going out the needle, only need push into the injection and connect, push away a position, first fixture block can block the injection joint under the recovery effort of first spring, during the back of the needle, only need press the button for first fixture block loses stopping to the injection joint, and under the effort that resets of second spring, the injection joint resets, and whole process is very simple swift, and the structure is also very simple, can reach smooth and easy needle insertion and back of the needle.

3. The utility model discloses when injecting out the needle, can slide snare ring to the afterbody for dop on the ring buckle just blocks to establish in the draw-in groove of wedge groove afterbody, fixes the snare ring, can avoid the snare ring to remove and lead to the snare head to go out to influence the injection when going out the needle.

4. The utility model discloses when carrying out the snare, can also inject, more practical.

Drawings

FIG. 1 is a schematic front view of a snare with an injection function;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic structural view of the needle-out state;

FIG. 4 is a schematic structural view of a needle return state;

FIG. 5 is a schematic structural view in the snared state;

FIG. 6 is a schematic view of the structure of the needle after the needle is removed from the snare;

fig. 7 is a partial schematic view of the injection fitting and reset post of fig. 1.

The device comprises a main body 1, a double-snare ring 2, a sliding cylinder 3, an electrode holder 4, a double-cavity sheath tube 5, an injection joint 6, an injection needle 7, a guide tube 8, a snare head 9, a traction wire 10, a finger ring tube 11, an axial through hole 12, a thumb ring 13, an axial block 14, a first notch 15, a vertical through hole 16, a reset clamp column 17, a first clamp block 18, a second clamp block 19, a second notch 20, a key 21, a positioning column 22, a blind hole 23, a first spring 24, a second spring 25, a wedge-shaped groove 26, a clamping groove 27, a ring buckle 28 and a clamping head 29.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings:

as shown in fig. 1-7: the utility model provides a snare of area injection function, including main part 1, main part 1 is hollow structure, gliding being provided with two snare ring 2 in main part 1, for realizing the stable slip of two snare ring 2 on main part 1, first spout and second spout have been seted up on the lateral wall of main part 1, two snare ring 2 include slide cartridge 3, slide cartridge 3's both sides all are provided with a ring, be provided with first slider and the second slider that slide setting is in first spout and second spout on slide cartridge 3's the inner wall, slide cartridge 3 is last to be provided with electrode holder 4.

One end of the main body 1 is fixedly connected with a double-cavity sheath tube 5, the other end of the main body 1 is provided with an injection joint 6, one cavity tube of the double-cavity sheath tube 5 is internally provided with an injection needle assembly, the other cavity tube of the double-cavity sheath tube 5 is internally provided with a snare assembly, the injection needle assembly comprises an injection needle head 7 and a guide tube 8, and the guide tube 8 is communicated between the injection joint 6 and the injection needle head 7; the snare assembly comprises a snare head 9 and a traction wire 10, the traction wire 10 is fixedly connected between the snare head 9 and the double-snare device finger ring 2, and the traction wire 10 is electrically connected with the electrode holder 4.

The main body 1 is provided with a ring tube 11 with an axial through hole 12 at one end of the injection joint 6, a thumb ring 13 is arranged on the ring tube 11, the injection joint 6 is slidably arranged in the axial through hole 12 of the ring tube 11, an axial block 14 is arranged on the injection joint 6, a first notch 15 is arranged on the axial block 14, a vertical through hole 16 penetrating through the axial through hole 12 is arranged on the ring tube 11, a reset clamping column 17 is slidably arranged in the vertical through hole 16, a first clamping block 18 and a second clamping block 19 on the same straight line are arranged on the reset clamping column 17, a second notch 20 is formed between the first clamping block 18 and the second clamping block 19, and one side of the first clamping block 18, which is close to the second clamping block 19, is in sliding contact with the axial block 14.

Fixedly connected with button 21 is served to the card post that resets 17, and one side that button 21 is close to ring pipe 11 is provided with two reference columns 22, and two reference columns 22 are symmetrical setting respectively in the both sides of card post 17 that resets, have seted up on the ring pipe 11 with two blind holes 23 of 12 vertically axial through hole of ring pipe 11, all overlap on two reference columns 22 and be equipped with first spring 24, and the other end of first spring 24 offsets with the bottom of blind hole 23. A wedge-shaped groove 26 is formed in the side face of the sliding barrel 3, a clamping groove 27 is formed in the tail of the wedge-shaped groove 26, a ring buckle 28 is fixedly connected to one end, away from the key 21, of the reset clamping column 17, and a clamping head 29 matched with the clamping groove 27 is arranged at the tail of the ring buckle 28.

The main body 1 and the ring pipe 11 are integrally formed, the hollow structure of the main body 1 is communicated with the axial through hole 12 of the ring pipe 11, a stepped hole is formed at the hollow structure of the main body 1 and the through hole, a second spring 25 is arranged in the axial through hole 12, one end of the second spring 25 is abutted against the stepped hole, and the other end of the second spring 25 is abutted against the injection connector 6.

The utility model discloses a use method as follows:

in the initial state, the snare head 9 and the injection needle 7 are both in a reset state, i.e. the snare head 9 and the injection needle 7 are located inside the double-lumen sheath 5. The forefinger and the middle finger of the medical staff can be respectively put into the two finger rings of the double-ring sleeve device finger ring 2, the whole sleeve device is stably clamped and fixed, and the thumb can be put into the thumb ring 13.

When a needle needs to be withdrawn, the thumb can be taken out of the thumb ring 13, then the injection joint 6 is pushed forwards from the rear end by the thumb, the second spring 25 is compressed in the pushing process, at this time, the first fixture block 18 slides on the axial block 14 on the injection joint 6, the first spring 24 is in a compressed state, when the injection joint 6 is pushed to the position where the first fixture block 18 and the first notch 15 of the axial block 14 are aligned, the reset fixture column 17 can insert the first fixture block 18 into the first notch 15 of the axial block 14 on the injection joint 6 under the reset acting force of the first spring 24, so that the injection joint 6 is clamped, at this time, the injection needle 7 is also withdrawn from the double-cavity sheath tube 5 along with the pushing of the injection joint 6, and the injection work can be performed. At the moment, the clamping head 29 on the finger ring buckle 28 is also clamped in the clamping groove 27 in the wedge-shaped groove 26 to fix the double-snare finger ring 2, so that the phenomenon that the moving of the double-snare finger ring 2 causes the snare head 9 to go out to influence the injection can be avoided during the needle withdrawing.

When the injection is finished, the key 21 is pressed in, so that the reset clamp column 17 moves downwards, on one hand, the reset clamp column 17 drives the ring buckle 28 to move downwards, and the purpose of releasing the ring buckle 28 and the double-snare ring 2 can be achieved; on the other hand, when the reset pin 17 moves downward and the second notch 20 between the first latch 18 and the second latch 19 intersects with the first notch 15, the first latch 18 loses the blocking of the injection connector 6, and the injection connector 6 is reset under the reset action of the second spring 25.

When the snare head 9 needs to be pulled out, the snare head 9 is pushed forwards by the double-cavity sheath tube 5 by the double-snare device finger ring 2 to perform snare work, the steps of needle pulling are repeated under the conditions that the snare of lesion tissues is not smooth, water shortage occurs, collapse occurs and the like, injection work is performed, and the needle pulling can be performed for injection when the snare head 9 is pulled out.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will understand that the present invention can be modified or replaced with other embodiments without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims. The technology, shape and construction parts which are not described in detail in the present invention are all known technology.

Claims (9)

1. A snare with an injection function comprises a main body, wherein the main body is of a hollow structure, a snare finger ring is slidably arranged on the main body, one end of the main body is fixedly connected with a double-cavity sheath tube, the other end of the main body is provided with an injection joint, an injection needle assembly is arranged in one cavity tube of the double-cavity sheath tube, a snare assembly is arranged in the other cavity tube of the double-cavity sheath tube, the snare assembly is electrically connected with an electrode holder, the snare assembly is in linkage connection with the snare finger ring, and the injection needle assembly is communicated with the injection joint; the method is characterized in that: the injection joint is provided with an axial block, the axial block is provided with a first notch, the ring pipe is provided with a vertical through hole penetrating through the axial through hole, a reset clamping column is arranged in the vertical through hole in a sliding manner, the reset clamping column is provided with a first clamping block and a second clamping block which are arranged on the same straight line, a second notch is formed between the first clamping block and the second clamping block, one side of the first clamping block, which is close to the second clamping block, is in sliding contact with the axial block, one end of the reset clamping column is fixedly connected with a key, and a first elastic element is arranged between the key and the ring pipe; and a second elastic piece is arranged between the injection joint and the axial through hole.

2. A snare with injection function according to claim 1, wherein: the snare ring comprises a sliding cylinder, and a first sliding block and a second sliding block which are arranged in the first sliding groove and the second sliding groove in a sliding mode are arranged on the inner wall of the sliding cylinder.

3. A snare with injection function according to claim 2, wherein: the side of slide cartridge is provided with the wedge groove, the afterbody in wedge groove is provided with the draw-in groove, the button was kept away from to the card post that resets one end fixedly connected with ring buckle, the afterbody of ring buckle be provided with draw-in groove complex dop.

4. A snare with injection function according to claim 1, wherein: the finger ring pipe is provided with a blind hole perpendicular to the axial through hole of the finger ring pipe, the first elastic piece is a first spring, one side of the key close to the finger ring pipe is provided with a positioning column, one end of the first spring is sleeved on the positioning column, and the other end of the first spring is abutted against the bottom of the blind hole.

5. A snare with injection function according to claim 4, wherein: the number of the blind holes, the first springs and the positioning columns is two, the two positioning columns are symmetrically arranged on two sides of the reset clamping column respectively, the two first springs are sleeved on the two positioning columns respectively, and the two first springs are arranged in the two blind holes respectively.

6. A snare with injection function according to any one of claims 1 to 5, wherein: the injection needle assembly comprises an injection needle head and a guide tube, and the guide tube is communicated between the injection joint and the injection needle head; the snare assembly comprises a snare head and a traction wire, the traction wire is fixedly connected between the snare head and the ring of the snare device, and the traction wire is electrically connected with the electrode holder.

7. A snare with injection function according to claim 6, wherein: the electrode holder is arranged on the ring of the snare device, and the ring of the snare device is a double-ring snare device ring.

8. A snare with injection function according to claim 7, wherein: the main body and the ring pipe are integrally formed, the hollow structure of the main body is communicated with the axial through hole of the ring pipe, a stepped hole is formed in the hollow structure of the main body and the through hole, the second elastic piece is a second spring, one end of the second spring abuts against the stepped hole, and the other end of the second spring abuts against the injection connector.

9. A snare with injection function according to claim 6, wherein: the ring pipe is provided with a thumb ring.

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