Tissue traction device for assisting endoscope treatmentTechnical Field
The invention relates to the field of medical auxiliary equipment, in particular to a tissue traction device in an endoscopic treatment operation, which comprises a tissue tractor and a pusher thereof.
Background
In recent years, with the rapid development of endoscopic treatment techniques, many new technological applications of endoscopic treatment have come forward, such as Endoscopic Submucosal Dissection (ESD), endoscopic tumor resection (ESE), endoscopic total layer resection (EFTR), oral endoscopic myotomy (poe m), and natural cavity endoscopic surgery (NOTES), and the like. Because of the limitations of the instrument structure of the endoscope itself, tissue traction cannot be performed under the endoscope, thereby bringing a lot of difficulties and obstacles to the treatment under the endoscope. At present, dental floss traction and other technologies are clinically used for assisting treatment, but the traction technology has a plurality of limitations, is complicated to implement and cannot meet clinical requirements.
In order to better realize traction in the endoscopic surgery, a good visual field is provided for the endoscopic surgery, a simpler and effective traction device is necessary to be developed, and an endoscopist is assisted to finish the endoscopic surgery with high difficulty, so that the surgical quality is improved, the surgical difficulty is reduced, the surgical time is shortened, the surgical safety is improved, and the clinical problem of realizing accurate tissue traction under the endoscope is effectively solved.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the tissue traction device for assisting the endoscope treatment, which solves the problems, can simply and conveniently send the tissue traction device into the area around the focus, accurately traction target tissues of an operation area in cooperation with the titanium clamp according to operation needs, flexibly traction the tissues to provide good vision and endoscope operation space for operators, effectively reduce operation difficulty and greatly improve operation speed.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The tissue traction device for assisting the endoscope treatment comprises a tissue traction device and a pushing device, wherein the tissue traction device is a dumbbell-shaped structure body of which two ends are made of soft polymer materials and are connected with connecting wires in the middle of O-shaped rings, the pushing device comprises a front end needle, a thin tube, a holding rod, a handle and a metal wire, the front end of the thin tube is connected with the front end needle, the rear end of the thin tube is connected with the holding rod, two tube cavities are axially formed inwards from the rear end face of the front end needle, the front end of the tube cavity is communicated with the peripheral surface of the front end needle to form a through hole, the handle is movably connected with the holding rod in a relative displacement mode, the two metal wires penetrate through the tube cavities of the front end needle, the front end of the metal wire is exposed out of the peripheral surface of the front end needle, the O-shaped ring holes at two ends of the tissue traction device are respectively clamped on the front ends of the metal wires, the rear end of the metal wire penetrates through the hollow cavity of the hose and penetrates into the holding rod to be connected with the handle.
According to the further improved technical scheme, the handle is movably connected with the holding rod in a relative displacement mode, namely, a through groove with the length longer than that of the handle is dug at the middle lower portion of the holding rod, a T-shaped or I-shaped handle is arranged in the through groove, and the upper end spring of the handle is connected with the inside of the holding rod above. The holding rod is held by one hand, the finger hooks the handle to move up and down along the holding rod, the metal wire is pulled back or put out, and the tissue tractor wound around the front end of the metal wire on the peripheral surface of the front end needle is delivered to the surrounding part of the focus.
According to a further improved technical scheme, an axial cylindrical groove is formed in a holding rod above the through groove, a spring is arranged in the cylindrical groove, and the bottom end of the spring is connected to the top end of the handle. The spring is arranged in the cylindrical groove, and the operation is relatively stable.
The invention further improves the technical scheme that the top wall in the cylinder groove is provided with a downward convex cylinder, the top of the handle is provided with a first convex column, the top of the first convex column is provided with a ring groove, the top end of the spring is sleeved on the cylinder, and the lower end of the spring is clamped on the cylinder in the ring groove. The two ends of the spring are clamped on the first convex column, so that the spring is fixed more firmly.
According to the technical scheme, the back of the handle is provided with an axial convex column II, the inner wall of the through groove of the holding rod is provided with a limiting groove which is clamped with the convex column II, the limiting groove is longer than the convex column II, and the convex column II moves up and down in the limiting groove. The handle is limited to move up and down along the limiting groove, and can not shake left and right, so that the operability is better.
According to a further improved technical scheme, the front end of the front end needle is cone-shaped. The hose can be conveniently put into human body.
According to the technical scheme of the invention, through holes leading to the peripheral surface of the front needle at the front end of the lumen are respectively arranged on the upper and lower opposite surfaces. The tissue retractor is wound on the front needle to expand and open, so that the tissue retractor is convenient to bind and fix.
According to the technical scheme, the front end of the metal wire is bifurcated, and the rear end of the metal wire is combined into one piece to form an inverted Y-shaped wire. Reduces redundant materials and facilitates the recovery and release of the metal wire.
The invention further improves the technical scheme that the front end of the metal wire is bent with a clamping hook. The holes at the two ends for hooking the tissue retractor can not fall off in the conveying process.
The invention further improves the technical scheme that the tissue retractor and the tubule are one of medical silicon rubber, polytetrafluoroethylene film, polyurethane film or polyamide film, and the holding rod, the handle and the front needle are made of polyethylene materials.
The invention has the beneficial effects that:
The invention utilizes the front end of the metal wire to fix the tissue retractor in the pusher, so that a user can conveniently send the retractor into an endoscope operation area through an endoscope duct at any time according to the needs in operation, the retractor does not need to withdraw from the endoscope in operation, and can combine the titanium clamp to carry out accurate intracavity traction on target tissues after being sent to the operation area.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the tissue retractor of the present invention;
FIG. 3 is a schematic view of the front needle and hose internal structure of the front portion of the present invention;
FIG. 4 is a schematic view of the internal structure of the rear guard bar and handle of the present invention;
FIG. 5 is a schematic view of the shape of a wire according to the present invention;
Fig. 6 is a perspective view of a pull handle of the present invention.
Detailed Description
As shown in figures 1 to 6, the tissue retractor 6 comprises a tissue retractor 6 and a pusher, wherein the tissue retractor 6 is a dumbbell-shaped structure body made of flexible polymer materials (such as medical silicon rubber) and provided with connecting wires between O-shaped rings at two ends, the length of the dumbbell-shaped structure body is between 1 and 10mm, the diameter of round holes at two ends is between 1 and 5mm, the thickness of the round holes at two ends is between 0 and 1.5mm, the pusher comprises a front needle 5, a tubule 4, a holding rod 2, a handle 3 and a metal wire 7, the front end of the tubule 4 is connected with the front needle 5, the rear end of the tubule 4 is connected with the holding rod 2, two tube cavities 51 are axially formed inwards from the rear end face of the front needle 5, the front end of the tube cavity 51 is communicated with the peripheral surface of the front needle to form a through hole 52, the through holes 52 are respectively arranged on the upper and lower opposite faces, the handle 3 is movably connected with the holding rod 2 in a relative displacement mode, specifically, a through groove 21 with the handle 3 with the length being longer than the length is excavated at the lower part in the middle of the holding rod 2, the through groove 21, the H-shaped handle 3 is arranged in the through groove 21, an axial cylinder groove 22 is arranged in the rod above the through groove 21, a protruding cylinder groove 22 is arranged in the cylinder groove 22, two cylinder cavities 31 are arranged in the cylinder grooves 31, the protruding cylinder groove 23 are arranged in the protruding cylinder groove 23, the protruding cylinder groove 23 is arranged in the protruding cylinder groove 31, and the protruding cylinder groove 31 is arranged at the top groove 31, and the top is sleeved on the top cylinder groove 32. The metal wire 7 is penetrated in the lumen 51 of the front needle, the front end exposes the peripheral surface of the front needle 5, the O-shaped ring holes at the two ends of the tissue retractor 6 are respectively clamped on the front end of the metal wire 7, in order to ensure that the tissue retractor 6 is fixed on the front needle and is not easy to fall off, the front end of the metal wire 7 is bent to form a clamping hook, the rear end of the metal wire 7 penetrates through the hollow cavity of the hose 4, and penetrates into the holding rod 2 to be connected with the ring buckle at the bottom end of the handle 3 in a winding manner.
In order to prevent the handle from shaking left and right and fix the stroke of the handle moving up and down, the back of the handle 3 is provided with an axial convex column II 33, the inner wall of the through groove of the holding rod 2 is provided with a limiting groove which is clamped with the convex column II 33, the limiting groove is longer than the convex column II 33, and the convex column moves up and down in the limiting groove.
The front end of the front needle 5 is cone-shaped for facilitating the hose to enter the human body.
The tissue retractor 6 and the tubule 4 can be one of medical silicon rubber, polytetrafluoroethylene film, polyurethane film or polyamide film, the holding rod 2, the handle 3 and the front end needle 5 are made of polyethylene materials, and the metal wire and the spring are medical stainless metal wires.
During production, two metal wires respectively penetrate through the lumen of the front end needle, are connected in an intersecting manner at a point outside the rear end face of the front end needle, and redundant one metal wire is removed to form an inverted Y-shaped bifurcation character. Then the rear end metal wire firstly passes through the thin tube and then passes through the holding rod to be connected with the ring buckle of the handle. Then the front end of the thin tube is bonded with the rear end of the front needle, and then the rear end of the thin tube is bonded with the holding rod. Then the spring is put into the cylinder groove of the holding rod, the top end is clamped on the cylinder in the cylinder groove, and then the handle is inserted into the through groove of the holding rod, so that the ring groove of the convex column at the top end is matched with the spring. Finally, the redundant metal wire is pulled out from the through hole on the peripheral surface of the front needle, the redundant part is cut off, and a part is left to be exposed. Finally, the tissue retractor is wound around the peripheral surface of the front needle clockwise or anticlockwise, and the round holes at the two ends of the tissue retractor are respectively fixed on the exposed metal wires.
The tissue retractor is sent to the vicinity of the focus position of the endoscopic surgery by using the pusher, the handle is pulled back, the metal wire is pulled back synchronously, the exposed part at the front end is pulled out, the tissue retractor is released near the focus, then the handle is released, and the pusher is pulled out. When the handle is loosened, the metal wire returns due to the elastic force of the spring, and a part of the metal wire is exposed on the peripheral surface of the front needle, so that the tissue retractor can be bundled again, and the repeated conveying can be performed for a plurality of times.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.