A tissue traction device for assisting endoscopic treatment

Abstract

The present invention discloses a tissue traction device for assisting endoscopic treatment. The tissue traction device is a dumbbell-shaped structure with a connecting line between two O-rings at both ends. The pusher includes a thin tube with a front end connected to a front needle and a rear end connected to a grip rod. Two lumens are axially opened inward from the rear end of the front needle. The front end of the lumen is connected to the peripheral surface of the front needle to form a through hole. The handle and the grip rod are relatively displaced and movably connected. Two metal wires are passed through the lumen of the front needle, and the front end is exposed to the peripheral surface of the front needle. The O-ring holes at both ends of the tissue traction device are respectively stuck on the front end of the metal wire. The rear end of the metal wire passes through the hollow cavity of the hose, passes into the grip rod and is connected to the handle. The present invention can deliver the tissue traction device to the endoscopic surgery area through the endoscopic biopsy channel at any time according to the needs during the operation, without withdrawing the endoscope. The titanium clip can be combined to achieve precise traction in the cavity, effectively reducing the difficulty of surgical operation and improving the speed of surgery.

Description

Technical Field

[0001] The present invention relates to the field of medical auxiliary equipment, and more specifically, to a tissue traction device during endoscopic treatment, including a tissue traction device and a pusher thereof. Background Art

[0002] In recent years, with the rapid development of endoscopic treatment technology, many new endoscopic treatment technologies have been developed, such as endoscopic submucosal dissection (ESD), endoscopic tumor excision (ESE), endoscopic full-thickness resection (EFTR), peroral endoscopic myotomy (POEM) and natural orifice endoscopic surgery (NOTES). Due to the limitations of the instrument structure of the endoscope itself, tissue traction cannot be performed under the endoscope, which brings many difficulties and obstacles to endoscopic treatment. At present, dental floss traction and other technical auxiliary treatments are mostly used in clinical practice, but this traction technology has many limitations, is cumbersome to implement, and cannot meet clinical needs.

[0003] In order to better achieve intra-endoscopic traction and provide a good field of view for endoscopic surgery, it is necessary to develop a simpler and more effective traction device to assist endoscopists in completing difficult endoscopic surgeries, thereby improving surgical quality, reducing surgical difficulty, shortening surgical time, and increasing surgical safety, thereby effectively solving the clinical problem of achieving precise tissue traction under endoscopy. Summary of the invention

[0004] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a tissue traction device for auxiliary endoscopic treatment that solves the above-mentioned problems. The tissue traction device can be easily sent into the area around the lesion, and the target tissue in the surgical area can be accurately pulled by the titanium clamp according to the needs of the operation. The flexible pulling of the tissue provides the surgeon with a good field of vision and endoscopic surgical operation space, effectively reduces the difficulty of the surgical operation, and greatly improves the speed of the operation.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A tissue traction device for assisting endoscopic treatment comprises a tissue tractor and a pusher thereof. The tissue tractor is a dumbbell-shaped structure made of soft polymer material with O-rings at both ends and a connecting line in the middle; the pusher comprises a front end needle, a thin tube, a gripping rod, a handle and a metal wire. The front end of the thin tube is connected to the front end needle, and the rear end is connected to the gripping rod. Two lumens are axially opened inward from the rear end surface of the front end needle. The front end of the lumens is connected to the peripheral surface of the front end needle to form a through hole. The handle and the gripping rod are relatively displaced and movably connected. Two metal wires are passed through the lumen of the front end needle, and the front end is exposed on the peripheral surface of the front end needle. The O-ring holes at both ends of the tissue tractor are respectively stuck on the front end of the metal wire. The rear end of the metal wire passes through the hollow cavity of the hose, passes into the gripping rod and is connected with the handle.

[0007] A further improved technical solution of the present invention is that the relative displacement and movable connection between the handle and the grip rod refers to that a through groove with a length greater than the length of the handle is excavated in the middle and lower part of the grip rod, a "T" or "I" shaped handle is placed in the through groove, and the upper spring of the handle is connected to the inside of the upper grip rod. The grip rod is held with one hand, the fingers hook the handle and move up and down along the grip rod, the metal wire is pulled back or extended, and the tissue retractor at the front end of the metal wire wrapped around the front needle surface is delivered to the area around the lesion.

[0008] A further improved technical solution of the present invention is that an axial cylindrical groove is provided in the grip rod above the through groove, the spring is placed in the cylindrical groove, and the bottom end is connected to the top of the handle. The spring is placed in the cylindrical groove and runs relatively stably.

[0009] The further improved technical solution of the present invention is that a downward convex cylinder is provided on the top wall of the cylindrical groove, a convex column is provided on the top of the handle, a ring groove is provided on the top of the convex column, the top of the spring is sleeved on the cylindrical body, and the lower end is clamped on the cylinder in the ring groove. Both ends of the spring are clamped on the convex column, so that the spring is fixed more firmly.

[0010] The further improved technical solution of the present invention is that the back of the handle is provided with an axial protrusion 2, and a limit groove is provided on the inner wall of the gripping rod through groove to be engaged with the protrusion 2, the limit groove is longer than the protrusion 2, and the protrusion 2 moves up and down in the limit groove. The handle is limited to move up and down along the limit groove, and will not shake left and right, and the operability is better.

[0011] A further improved technical solution of the present invention is that the front end of the front end needle is awl-shaped, so as to facilitate the hose to enter the human body.

[0012] A further improved technical solution of the present invention is that the through holes from the front end of the lumen to the peripheral surface of the front end needle are arranged on upper and lower opposite surfaces. The tissue retractor is wrapped around the front end needle to expand and open it for easy bundling and fixing.

[0013] A further improved technical solution of the present invention is that the front end of the metal wire is forked and the rear end is combined into one, forming an inverted "Y" shape, thereby reducing redundant materials and facilitating the recycling and release of the metal wire.

[0014] A further improved technical solution of the present invention is that the front end of the metal wire is bent with a hook for hooking the two end holes of the tissue retractor so as not to fall off during the transportation process.

[0015] A further improved technical solution of the present invention is that the tissue retractor and the thin tube are made of one of medical silicone rubber, polytetrafluoroethylene film, polyurethane film or polyamide film, and the gripping rod, handle and front end needle are made of polyethylene material.

[0016] Beneficial effects of the present invention:

[0017] The present invention utilizes the front end of the metal wire to fix the tissue retractor in the pusher, so that the operator can send the retractor into the endoscopic surgical area through the endoscopic channel at any time during the operation as needed, without withdrawing the endoscope during the operation. After the retractor reaches the surgical area, it can be combined with the titanium clip to perform precise intracavitary traction on the target tissue. Since the tissue retractor used has good retraction elasticity, it can ensure continuous traction during the operation, provide the operator with a good field of vision, and does not affect the endoscopic operation. During the operation, multiple tissue retractors can be repeatedly sent into the surgical area as needed, which greatly simplifies the current cumbersome process of placing dental floss traction, making intraoperative traction safer, more convenient and faster. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the tissue tractor of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the front needle and the hose at the front of the present invention;

[0021] Figure 4 It is a schematic diagram of the internal structure of the rear guard bar and the handle of the present invention;

[0022] Figure 5 It is a schematic diagram of the shape of the metal wire of the present invention;

[0023] Figure 6 A three-dimensional diagram of the handle of the present invention. DETAILED DESCRIPTION

[0024] like Figures 1 to 6As shown, the present invention includes a tissue tractor 6 and a pusher. The tissue tractor 6 is a dumbbell-shaped structure made of a soft polymer material (such as medical silicone rubber) with O-rings at both ends and a connecting line in the middle. The length is between 1-10 mm, the diameter of the round holes at both ends is between 1-5 mm, and the thickness is between 0-1 .5mm; the pusher includes a front end needle 5, a capillary 4, a gripping rod 2, a handle 3 and a metal wire 7, the front end of the capillary 4 is connected to the front end needle 5, and the rear end is connected to the gripping rod 2, two lumens 51 are axially opened inward from the rear end surface of the front end needle 5, the front end of the lumens 51 is connected to the peripheral surface of the front end needle to form a through hole 52, and the through holes 52 are arranged on the upper and lower opposite surfaces, and the handle 3 is relatively shifted and movably connected to the gripping rod 2, specifically, a through groove 21 with a length greater than the length of the handle is excavated in the middle and lower part of the gripping rod 2, and the "I"-shaped handle 3 is placed in the through groove 21, and an axial cylindrical groove 22 is provided in the gripping rod above the through groove 21, and a downwardly convex cylinder 23 is provided on the top wall of the cylindrical groove 22, a convex column 31 is provided on the top of the handle 3, and an annular groove 32 is opened on the top of the convex column 31, and a spring 1 is placed in the cylindrical groove 22, the top end is sleeved on the cylinder 23, and the lower end is stuck on the cylinder in the annular groove 32. The metal wire 7 is passed through the tubular cavity 51 of the front end needle, and the front end is exposed to the peripheral surface of the front end needle 5. The O-ring holes at both ends of the tissue retractor 6 are respectively clamped on the front end of the metal wire 7. In order to fix the tissue retractor 6 on the front end needle and prevent it from falling off, the front end of the metal wire 7 is bent with a hook. The rear end of the metal wire 7 passes through the hollow cavity of the hose 4, enters the grip rod 2, and is wrapped around the buckle at the bottom end of the handle 3 for connection.

[0025] In order to prevent the handle from shaking left and right and to fix the handle's up and down movement, an axial boss 2 33 is provided on the back of the handle 3, and a limiting groove that fits with the boss 2 33 is provided on the inner wall of the through groove of the grip rod 2. The limiting groove is longer than the boss 2 33, and the boss moves up and down in the limiting groove.

[0026] In order to facilitate the hose to enter the human body, the front end of the front end needle 5 is a cone-shaped.

[0027] The tissue retractor 6 and the capillary 4 described in the present application can be made of one of medical silicone rubber, polytetrafluoroethylene film, polyurethane film or polyamide film; the gripping rod 2, the handle 3 and the front end needle 5 are made of polyethylene material; the metal wire and the spring are medical stainless metal wire.

[0028] During the production of the product, two metal wires are first passed through the lumen of the front needle, intersected and connected at a point outside the rear end surface of the front needle, and an extra metal wire is removed to form an inverted "Y"-shaped bifurcated shape. Then the rear end metal wire first passes through the thin tube, then passes through the grip rod, and is connected to the ring buckle of the handle. Then the front end of the thin tube is bonded to the rear end of the front needle, and then the rear end of the thin tube is bonded to the grip rod. Then the spring is placed in the cylindrical groove of the grip rod, and the top end is stuck on the cylinder in the cylindrical groove. Then the handle is inserted into the through groove of the grip rod so that the ring groove of the convex column at the top matches the spring. Finally, the extra metal wire is pulled out from the through hole on the peripheral surface of the front needle, and the extra part is cut off, leaving a part exposed. Finally, the tissue retractor is wound clockwise or counterclockwise around the peripheral surface of the front needle, and the round holes at both ends of the tissue retractor are fixed on the exposed metal wire respectively.

[0029] Use the pusher to send the tissue retractor to the vicinity of the lesion for endoscopic surgery, pull back the handle, pull back the wire synchronously, pull out the exposed front end, release the tissue retractor near the lesion, then release the handle and pull out the pusher. When the handle is released, due to the elastic force of the spring, the wire moves back and a part of the wire will be exposed around the front needle surface, so that the tissue retractor can be bundled again, and it can be transported repeatedly.

[0030] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A tissue traction device for assisting endoscopic treatment, characterized in that: It comprises a tissue tractor (6) and a pusher thereof. The tissue tractor (6) is a dumbbell-shaped structure with two O-rings at both ends made of a soft polymer material and a connecting line in the middle. The pusher comprises a front end needle (5), a thin tube (4), a gripping rod (2), a handle (3) and a metal wire (7). The front end of the thin tube (4) is connected to the front end needle (5), and the rear end is connected to the gripping rod (2). Two lumens (51) are axially opened inward from the rear end surface of the front end needle (5). The front end of the lumens (51) is connected to the peripheral surface of the front end needle to form a through hole (52). The handle (3) and the gripping rod (2) are relatively displaceably connected. The metal wire (7) is inserted into the lumen (51) of the front end needle, and the front end is exposed from the peripheral surface of the front end needle (5). The O-ring holes at both ends of the tissue tractor (6) are respectively clamped on the front end of the metal wire (7). The rear end of the metal wire (7) passes through the hollow cavity of the thin tube (4), enters the gripping rod (2) and is connected to the handle (3). The relative displacement movable connection between the handle and the grip rod means that a through groove (21) having a length greater than the length of the handle is excavated in the middle and lower part of the grip rod (2), a "T"-shaped or "I"-shaped handle (3) is placed in the through groove (21), and a spring (1) at the upper end of the handle (3) is connected to the inside of the upper grip rod (2); an axial cylindrical groove (22) is provided in the grip rod above the through groove (21), and the spring (1) is placed in the cylindrical groove (22), with the bottom end connected to the top of the handle (3); A second axial protrusion (33) is provided on the back of the handle (3), and a limiting groove which is engaged with the second protrusion (33) is provided on the inner wall of the through groove of the grip rod (2). The limiting groove is longer than the second protrusion (33), and the protrusion moves up and down in the limiting groove.

2. A tissue traction device for assisting endoscopic treatment according to claim 1, characterized in that: a downwardly convex cylindrical body (23) is provided on the inner top wall of the cylindrical groove (22), a convex column (31) is provided on the top of the handle (3), an annular groove (32) is provided on the top of the convex column (31), the top end of the spring (1) is sleeved on the cylindrical body (23), and the lower end is clamped on the cylinder in the annular groove (32).

3. The tissue traction device for assisting endoscopic treatment according to claim 1, characterized in that: The front end of the front end needle (5) is awl-shaped.

4. The tissue traction device for assisting endoscopic treatment according to claim 1, characterized in that: The through holes (52) extending from the front end of the tube cavity to the front end needle peripheral surface are arranged on the upper and lower opposite surfaces.

5. The tissue traction device for assisting endoscopic treatment according to claim 1, characterized in that: The metal wire (7) has a forked front end and merges into one at the rear end, forming an inverted "Y" shape.

6. The tissue traction device for assisting endoscopic treatment according to claim 1, characterized in that: The front end of the metal wire (7) is bent to have a hook.

7. The tissue traction device for assisting endoscopic treatment according to claim 1, characterized in that: The tissue retractor (6) and the thin tube (4) are made of one of medical silicone rubber, polytetrafluoroethylene film, polyurethane film or polyamide film, and the gripping rod (2), the handle (3) and the front end needle (5) are made of polyethylene material.

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