CN104473687B - There are the bendable end operating theater instruments of pre- bend pipe structure - Google Patents

Abstract

The invention relates to a bendable surgical instrument with a pre-bent tube structure, which is provided with a handle and an operating rod. The handle and the operating rod are provided with a pre-bent tube, and the pre-bent tube is assembled on the push-pull handle. On the push-pull rod, the operating rod can move relative to the handle to adjust the extension length of the pre-bent tube relative to the operating rod. The inside of the operating rod and the pre-bending tube is connected to form a built-in instrument channel. The pre-bending tube Tubes can be single or nested multiples. In the present invention, materials that can be naturally bent in one direction, such as metal braided tubes, are applied to the field of surgical instruments, and the length of the handles protruding from the distal end of the operating rod is controlled by pushing and pulling the handle, so that different shapes of instrument ends can be obtained, such as curved, "S ”-shaped double-curvature bending, etc., so that the surgical instruments assembled in the built-in instrument channel can reach all parts of the lesion, the operation is more precise, and it can realize full-angle without blind spots, which is convenient to remove tumors of various shapes and positions, and the operation is simpler. Better results.

Description

End-bendable surgical instrument with pre-bent tube structure

technical field

The invention relates to the technical field of medical instruments, in particular to a bendable surgical instrument with a pre-bent tube structure.

Background technique

At present, endovascular surgery is an important method for the treatment of non-muscle invasive bladder tumors and other diseases. With the continuous development of science and technology, endovascular surgery treatment methods are emerging in an endless stream, including monopolar resection, plasma resection, holmium laser, thulium laser Surgery, fluorescein or NBI-assisted resection, etc.

For intracavitary lesions that are large in size, irregular in shape, multiple, or located in the blind area of the operation, the current medical devices still have certain limitations in the operation, and often require multiple operations to resect, which is easy to lose the anatomical level and is not convenient for surgical operation , and it is easy to cause incomplete resection or too deep and too much tissue resection, which will lead to unsatisfactory surgical results, high postoperative complications and high recurrence rates.

It can be seen that there is an urgent need for a more precise operation, which is convenient for removing tumors of various shapes and positions, and an instrument for improving the operation effect.

Contents of the invention

The object of the present invention is to address the deficiencies in the prior art and provide a bendable surgical instrument with a pre-bent tube structure.

For realizing above-mentioned object, the technical scheme that the present invention takes is:

A bendable surgical instrument at the end with a pre-bent tube structure, provided with a handle and an operating rod, the handle and the operating rod are provided with a pre-bent tube, and the pre-bent tube is assembled on the push-pull rod of the push-pull handle, The push-pull rod can move relative to the handle to adjust the protruding length of the pre-bent tube relative to the operating rod, and the inside of the push-pull rod and the pre-bend tube communicate to form a built-in instrument channel.

There are two pre-bent pipes, namely the first pre-bend pipe and the second pre-bend pipe, the first pre-bend pipe is nested inside the second pre-bend pipe, and the first pre-bend pipe and the second pre-bent pipe are respectively assembled on the first push-pull rod and the second push-pull rod.

The first push-pull rod and the second push-pull rod are groove-fitted and can slide relative to each other.

The proximal end of the push-pull rod is provided with clamping claws, and the outside of the clamping claws is provided with locking sleeves.

When the clamping jaws are integrated, the circumference from the proximal end to the distal end gradually decreases, and the inner wall circumference of the locking sleeve also decreases gradually from the proximal end to the distal end; the clamping jaws Threaded connection with locking sleeve.

The inner wall of the handle is provided with a groove, the bottom of the groove is fixed with a spring, and the upper end of the spring is provided with marbles; the outer wall of the push-pull rod is provided with axially arranged pits.

The pre-bent pipe is made of metal braided pipe, nickel-titanium alloy thin-walled pipe or polymer plastic.

The present invention has the advantage that:

1. In the present invention, materials that can be naturally bent in one direction, such as metal braided tubes, are applied to the field of surgical instruments, and the length extending from the distal end of the operating rod is controlled by the push-pull handle, so that different shapes of instrument ends can be obtained, such as arc, "S"-shaped double-curvature bending, etc., so that the surgical instruments assembled in the built-in instrument channel can reach all parts of the lesion, and the operation is more precise. Under a specific surgical channel, compared with the existing surgical instruments, the present invention can achieve There is no blind area at all angles, which is convenient for removing tumors of various shapes and positions, and the operation is simpler and the operation effect is better;

2. When two nested pre-bent pipes are set in the present invention, the two push-pull rods used for manipulating the pre-bent pipes are fitted in grooves, so that the movement of the two can be calibrated on a straight line, and the two push-pull rods can be controlled more precisely. The shape of a pre-bent tube, and can ensure that when one of the push-pull rods is locked, the other push-pull rod is also indirectly locked;

3. The push-pull rod can be locked, which is convenient for fixing the shape of the pre-bent pipe, and the locking design of the push-pull rod of the present invention is convenient and practical;

4. The proximal end of the push-pull rod is provided with grippers, which can be rotated and locked by the locking sleeve to lock the surgical instruments in the built-in instrument channel, and the operation is very simple.

Description of drawings

Accompanying drawing 1 is the perspective view of the end bendable surgical instrument with pre-bent tube structure in embodiment 1.

Accompanying drawing 2 is A-A sectional view of Fig. 1.

Accompanying drawing 3 is the fixing schematic diagram of push-pull handle in embodiment 1.

Accompanying drawing 4 is a schematic diagram of the proximal structure of the push-pull rod in embodiment 1.

Accompanying drawing 5 is the partial enlarged view of B in Fig. 2.

Accompanying drawing 6 is the perspective view of the end bendable surgical instrument with the pre-bent tube structure in embodiment 2.

Accompanying drawing 7 is the C-C sectional view of Fig. 6.

Accompanying drawing 8 is the structure diagram of first push-pull rod and second push-pull rod in embodiment 2.

Accompanying drawing 9 is the fixing principle diagram of the first push-pull handle in embodiment 2.

detailed description

The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.

The reference signs and components involved in the accompanying drawings are as follows:

21. Handle, 211. Groove, 212. Spring, 213. Marble

22. push-pull handle, 2210. first push-pull handle, 2220. second push-pull handle, 221. finger ring, 2211. first finger ring, 2212. second finger ring, 222. push-pull rod, 2221. first push-pull rod, 2222. first Two push-pull rods, 2223. Dimple, 2224. Gripper, 2225. External thread

23. Joystick

24. Pre-bending pipe, 241. The first pre-bending pipe, 242. The second pre-bending pipe

25. Locking sleeve, 251. Rotary handle, 252. Internal thread

26. Built-in instrument channel

Example 1

Please refer to FIG. 1 . FIG. 1 is a perspective view of the end-bendable surgical instrument with a pre-bent tube structure in Embodiment 1. Referring to FIG. The end bendable surgical instrument with a pre-bent tube structure is provided with a handle 21 , a push-pull handle 22 , an operating rod 23 , a pre-bent tube 24 and a locking sleeve 25 . One end of the handle 21 is connected with the push-pull handle 22 , and the other end is connected with the operating rod 23 . The handle 21, the push-pull handle 22, the operating rod 23, and the pre-bent pipe 24 are all provided with cavities. The pre-bent pipe 24 is located inside the handle 21 and the operating rod 23 . The locking sleeve 25 is sleeved on the proximal end of the push-pull handle 22 , and the outer wall of the locking sleeve 25 is provided with a handle 251 .

Please refer to FIG. 2 , which is a cross-sectional view along line A-A of FIG. 1 . The push-pull handle 22 is provided with a finger ring 221 and a push-pull rod 222; the finger ring 221 is fixed on the middle section of the push-pull rod 222; Can slide in the cavity of the handle 21. The pre-bent tube 24 is assembled on the far end of the push-pull rod 222 . The inside of the push-pull handle 22 and the pre-bent tube 24 are connected to form a built-in instrument channel 26 . The locking sleeve 25 is sleeved on the outside of the proximal end of the push-pull rod 222 .

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of the fixing principle of the push-pull handle in Embodiment 1. The inner wall of the proximal end of the handle 21 is provided with a groove 211 , the bottom of the groove 211 is fixed with a spring 212 , and the upper end of the spring 212 is provided with a marble 213 . The outer wall of the distal end of the push-pull rod 222 is provided with dimples 2223 arranged axially. When force is applied to the push-pull rod 222 to make it slide in the cavity of the handle 21, the marble 213 is compressed and retracted into the groove 211. When the force is stopped, under the resilience of the spring 212, the The marble 213 falls into one of the recesses 2223 , so that the push-pull rod 222 is fixed relative to the handle 21 .

Please refer to FIG. 4 and FIG. 5 , FIG. 4 is a schematic diagram of the proximal structure of the push-pull rod in Embodiment 1, and FIG. 5 is a partial enlarged view of B in FIG. 2 . The proximal end of the push-pull rod 222 is provided with four jaws 2224; the inner wall of the jaws 2224 is arc-shaped, and the four jaws 2224 reserve a built-in instrument channel 26 in the center; the outer walls of the four jaws 2224 are provided with There are external threads 2225; when the four jaws 2224 are integrated, the circumference from the proximal end to the distal end gradually becomes smaller. The locking sleeve 25 is sleeved on the outside of the four jaws 2224, and the inner wall circumference of the locking sleeve 25 gradually becomes smaller from the proximal end to the far end, and the inner wall of the locking sleeve 25 is provided with an inner wall. Thread 252. The internal thread 252 cooperates with the external thread 2225 so that the locking sleeve 25 can rotate axially at the proximal end of the push-pull rod 222 .

Example 2

Please refer to FIG. 6 . FIG. 6 is a perspective view of the end-bendable surgical instrument with a pre-bent tube structure in Embodiment 2. Referring to FIG. The end bendable surgical instrument with a pre-bent tube structure is provided with a handle 21 , a push-pull handle 22 , an operating rod 23 , a pre-bent tube 24 and a locking sleeve 25 . There are two push-pull handles 22, namely the first push-pull handle 2210 at the proximal end and the second push-pull handle 2220 at the far end. There are also two pre-bent pipes 24 , namely a first pre-bend pipe 241 and a second pre-bend pipe 242 . One end of the handle 21 is connected to the second push-pull handle 2220 , and the other end is connected to the operating rod 23 . The handle 21 , the first push-pull handle 2210 , the second push-pull handle 2220 , the operating rod 23 , the first pre-bent pipe 241 and the second pre-bend pipe 242 are all provided with cavities. The second pre-bending tube 242 is located inside the handle 21 and the operating rod 23 , and the first pre-bending tube 241 runs through the inside of the second pre-bending tube 242 . The locking sleeve 25 is sleeved on the proximal end of the first push-pull handle 2210 , and the outer wall of the locking sleeve 25 is provided with a handle 251 .

Please refer to FIG. 7 , which is a sectional view along line C-C of FIG. 6 . The first push-pull handle 2210 is provided with a first ring 2211 and a first push-pull rod 2221, and the first ring 2211 is fixed on the middle section of the first push-pull rod 2221; the second push-pull handle 2220 is provided with The second finger ring 2212 and the second push-pull rod 2222 . The second push-pull rod 2222 is located above the distal end of the first push-pull rod 2221 . The distal end of the second push-pull rod 2222 is fitted in the cavity of the handle 21 and can slide in the cavity of the handle 21. The distal end of the first push-pull rod 2221 is also fitted in the cavity of the handle 21 and can slide in the cavity of the handle. 21 slides in the cavity. The second pre-bent tube 242 is assembled at the distal end of the second push-pull rod 2222, the first pre-bent tube 241 is assembled at the distal end of the first push-pull rod 2221, and the first pre-bent tube 241 runs through the second pre-bend tube 2222. Inside the elbow 242 . The insides of the first push-pull handle 2210 , the second push-pull handle 2220 , the first pre-bent tube 241 and the second pre-bend tube 242 are connected to form the built-in instrument channel 26 . The locking sleeve 25 is sleeved on the outside of the proximal end of the first push-pull handle 2210 .

Please refer to FIG. 8 . FIG. 8 is a structural diagram of the first push-pull rod and the second push-pull rod in Embodiment 2. The second push-pull rod 2222 is located above the distal end of the first push-pull rod 2221, and the two groove-type fittings can slide relative to each other, and the contact parts of the second push-pull rod 2222 and the first push-pull rod 2221 are merged and reserved. Built-in instrument channel 26. The proximal end of the first push-pull rod 2221 is provided with four jaws 2224; the inner walls of the jaws 2224 are arc-shaped; the outer walls of the four jaws 2224 are provided with external threads 2225.

Similar to Embodiment 1, when the four jaws 2224 are integrated, the circumference thereof gradually decreases from the proximal end to the distal end. The locking sleeve 25 is sleeved on the outside of the four jaws 2224, and the inner wall circumference of the locking sleeve 25 gradually becomes smaller from the proximal end to the far end, and the inner wall of the locking sleeve 25 is provided with an inner wall. Thread 252. The internal thread 252 cooperates with the external thread 2225 so that the locking sleeve 25 can rotate axially at the proximal end of the first push-pull rod 2221 .

Please refer to FIG. 9 . FIG. 9 is a schematic diagram of fixing the first push-pull handle in Embodiment 2. The inner wall of the proximal end of the handle 21 is provided with a groove 211 , the bottom of the groove 211 is fixed with a spring 212 , and the upper end of the spring 212 is provided with a marble 213 . The outer wall of the distal end of the first push-pull rod 2221 is provided with dimples 2223 arranged axially. When force is applied to the first push-pull rod 2221 to make it slide in the cavity of the handle 21, the marble 213 is compressed and retracted into the groove 211. When the force is stopped, under the rebound force of the spring 212, the The marble 213 falls into one of the recesses 2223, the first push-pull rod 2221 is fixed relative to the handle 21, and indirectly, the second push-pull rod 2222 is also fixed.

For the above examples 1-2, it should be noted that, herein, the "proximal end" refers to the end of the present invention that is closer to the operator in the state of use, that is, the operation state, and the "far end" refers to the end of the present invention. Invention is the end that is farther away from the operator under the state of use, that is, the operation state. The built-in instrument channel 26 is used for assembling surgical instruments, such as laser fibers, flexible injection needles, flexible surgical scissors, flexible grasping forceps, and the like. The pre-bent tube 24 is made of a material with good bending performance and high strength that can be bent in one direction naturally, such as a metal braided tube, a nickel-titanium alloy thin-walled tube or a polymer plastic, etc., preferably a metal braided tube, such as SS304 , SS316 material, its torque is about 1:1, transmission force and bending performance are good, pre-bending tube 24 can be a single-layer or multi-layer braided hollow tube, can be made of a kind of round wire, flat wire, other special-shaped wire Or several kinds of weaving. The pre-bent tube 24 is assembled on the push-pull rod 222 of the push-pull handle 22, and the operator can adjust the length of the pre-bend tube 24 protruding from the distal end of the operating rod 23 by manipulating the finger ring 221. Because the pre-bend tube 24 itself has bending properties , so it bends into different shapes depending on the extension length, which is convenient to reach various parts of the lesion. Embodiment 2 is provided with two nested pre-bent pipes 24, and correspondingly provided with a push-pull handle 22 for manipulating the two pre-bent pipes 24, so by adjusting the extension length of the two pre-bent pipes 24, "S" can be obtained. ”-shaped double-curvature curved end of the instrument, the end is more flexible, which increases the fineness of the operation and can achieve full-angle without blind spots. In addition, more nested pre-bent tubes 24 can be set to obtain more diverse instruments end shape. The first push-pull rod 2221 and the second push-pull rod 2222 described in Embodiment 2 are fitted in grooves, which has the advantage that the movement of the two can be calibrated on a straight line, and the first pre-bent pipe 241 can be controlled more precisely. And the shape of the second pre-bent pipe 242, and can ensure that when one of the push-pull rods is locked, the other push-pull rod is also indirectly locked. The groove 211, spring 212, and marble 213 on the handle 21 cooperate with the pit 2223 of the push-pull rod 222 to lock the push-pull handle 22, thereby fixing the shape of the pre-bent pipe 24. This locking method is very easy to operate . The proximal end of the push-pull rod 222 is designed with a jaw 2224, which cooperates with the locking sleeve 25 to lock the built-in instrument. This locking method is also very easy to operate. The handle 251 is for the convenience of rotating the locking sleeve 25 . The operating rod 23 may be flexible.

Taking transurethral intracavity surgery for non-muscle invasive bladder tumors as an example, a laser optical fiber or other surgical instruments are inserted into the built-in instrument channel 26 of the end-bendable surgical instrument with a pre-bent tube structure in the present invention, and the locking sleeve is rotated. The cylinder 25 locks the surgical instrument, inserts the operating rod 23 through the working channel of the endoscope to the bladder, then holds the handle 21 and manipulates the ring 221 with fingers, and controls the protruding length of the pre-bent tube 24 relative to the operating rod 23 by pushing and pulling until The pre-bent tube 24 has a suitable shape reaching the lesion, stop pushing and pulling, at this time the marble 213 falls into the pit 2223, the push-pull handle 22 is locked, and the operation can be performed. Compared with the existing surgical instruments, the bendable surgical instrument at the end of the present invention has a pre-bent tube structure with finer operation and no blind area at all angles, so the resection is more thorough, the resection depth is easy to grasp, and the operation is more humanized, which can significantly improve the surgical effect. Reduce the operator's workload.

The present invention can also be used for resection of other urothelial tumors, such as ureteral cancer, renal pelvis cancer and other diseases, and it only needs to make surgical instruments of corresponding sizes according to different application sites.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the method of the present invention, some improvements and supplements can also be made, and these improvements and supplements should also be considered Be the protection scope of the present invention.

Claims (6)

1. a kind of bendable end operating theater instruments with pre- bend pipe structure, are provided with handle and action bars, and which is special Levy and be, in described handle and action bars, be provided with pre- bend pipe, described pre- bend pipe is assemblied in drawing handle On the distal end of push-pull bar, described push-pull bar relative to handle movement and then can adjust pre- bend pipe relative to operation The internal run-through of the extension elongation of bar, described push-pull bar and pre- bend pipe forms indwelling device passage；Described The near-end of push-pull bar is provided with jaw, and the outside of described jaw is provided with locking sleeve.

2. operating theater instruments according to claim 1, it is characterised in that described pre- bend pipe has two, Respectively first pre- bend pipe and the second pre- bend pipe, the first described pre- bend pipe are nested in inside the second pre- bend pipe, The first described pre- bend pipe and the second pre- bend pipe are respectively assembled on the first push-pull bar and the second push-pull bar.

3. operating theater instruments according to claim 2, it is characterised in that the first described push-pull bar and Two push-pull bar slot types are chimeric relative to each other can to slide.

4. operating theater instruments according to claim 1, it is characterised in that described jaw is incorporated in one When, proximally the Zhou Jing to distal end is tapered into, and the inwall Zhou Jing of described locking sleeve is proximally to distal end Also taper into；Described jaw and locking sleeve threaded connection.

5. operating theater instruments according to claim 1, it is characterised in that described handle inwall is provided with recessed Groove, described bottom portion of groove are fixed with spring, and described spring upper end is provided with hoodle；Outside described push-pull bar Wall is provided with the pit of axially arrangement.

6. operating theater instruments according to claim 1, it is characterised in that described pre- bend pipe is compiled by metal Knit pipe, Nitinol light-wall pipe or high molecule plastic to make.