A cervical lesion resection device

Abstract

The present invention relates to an instrument for cervical lesions, specifically a cervical lesion resection device, which includes a branch pipe that can extend into the cervical canal. A hollow inner pipe that can move axially along the branch pipe is provided inside the branch pipe. An electric knife that can move axially along with the inner pipe is provided on the inner pipe. The electric knife extends out of or retracts into the branch pipe through a driving mechanism provided on the inner pipe. The present invention is provided with a branch pipe and an electric knife. The branch pipe can rotate 360 degrees with the cervical canal as a fulcrum, thereby driving the electric knife to rotate 360 degrees, and precisely controlling the angle between the branch pipe and the electric knife by driving the electric knife to extend out of or retract into the branch pipe, so as to determine the resection range of the diseased tissue, and achieve the purpose of accurately resected the diseased tissue.

Description

Technical Field

[0001] The present invention relates to an instrument for cervical lesions, and specifically to a cervical lesion resection device. Background Art

[0002] Cervical intraepithelial neoplasia (CIN) is a group of precancerous lesions closely related to cervical cancer, and its incidence rate has been increasing year by year. If not treated in time, about 20% of CIN II and CIN III lesions will progress, and 5% will develop into invasive cancer. Therefore, correct and effective treatment can effectively block the occurrence and development of cervical cancer. In clinical work, loop electrosurgical excision procedure (LEEP) or cold knife conization is usually used to diagnose and treat cervical precancerous lesions. For patients with large lesion areas or old cervical lacerations, tissue specimens are prone to fragmentation and incompleteness during the operation of a single loop electrosurgical excision procedure, or the resection range is insufficient, resulting in the possibility of missed pathological diagnosis. And using cold knife conization to excise the diseased cervical tissue is a common method for treating the above-mentioned lesions. Cold knife conization has the advantages of high cure rate and rapid repair of the cervix. However, in the prior art, the cold knife conization operation uses ordinary surgical knives, including round blades and pointed blades. The effect of using ordinary surgical knives for cervical conization depends to a large extent on the experience of the operator. Moreover, even if the operator has high surgical experience, there are still phenomena such as difficult control of the conization size, inconvenient operation, excessive resection or incomplete resection of the diseased tissue. Summary of the Invention

[0003] Aiming at the above technical problems, the present invention provides a cervical lesion resection device that can ensure complete resection of the diseased tissue.

[0004] The technical solution adopted by the present invention is: a cervical lesion resection device, including a branch tube that can extend into the cervical canal. A hollow inner tube that can move axially along the branch tube is provided inside the branch tube. An electric knife that can move axially along the inner tube is provided on the inner tube. The electric knife extends out of or retracts into the branch tube through a driving mechanism provided on the inner tube.

[0005] Preferably, a pin shaft is radially provided at the end of the inner tube deviating from the axis of the inner tube, and the electric knife is installed on the pin shaft. The driving mechanism drives the electric knife to rotate around the pin shaft.

[0006] Preferably, one end of the electric knife is sleeved on the pin shaft near the end. An opening is axially provided on the side wall of the branch tube. When the driving mechanism drives one end of the electric knife, the other end of the electric knife extends out of or retracts into the branch tube from the opening.

[0007] Preferably, the driving mechanism includes a plunger and a powerful spring disposed in the inner cavity of the inner tube. One end of the powerful spring is connected to the bottom of the plunger, and the other end is connected to the end of one end of the electrocautery knife. The plunger moving axially along the inner tube deforms the powerful spring, and the deformed powerful spring drives one end of the electrocautery knife to rotate around the pin shaft.

[0008] Preferably, the plunger is a threaded plug, and an internal thread is formed in the inner cavity of the inner tube. The plunger axially moves along the inner cavity of the inner tube by means of the cooperation between its external thread and the internal thread.

[0009] Preferably, a groove is formed at the bottom of the plunger, and a top plate is disposed in the groove with a radial clearance fit. One end of the powerful spring abuts against the top plate.

[0010] Preferably, several balls are provided between the top plate and the bottom of the groove.

[0011] Preferably, a connecting rod is fixedly provided at the top of the plunger, and a rotating handle for hand-holding is provided at the end of the connecting rod.

[0012] Preferably, a scale is provided axially on the connecting rod.

[0013] Preferably, the extending end of the branch pipe is spherical.

[0014] As can be seen from the above solutions, the present invention is provided with a branch pipe and an electrocautery knife. The branch pipe can rotate 360 degrees with the cervical canal as the fulcrum, thereby driving the electrocautery knife to rotate 360 degrees, and precisely controlling the angle between the branch pipe and the electrocautery knife by driving the electrocautery knife to extend or retract from the branch pipe, so as to determine the resection range of the diseased tissue, and achieve the purpose of accurately resecing the diseased tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following Figure 1 introduces the present invention in detail. Here, the schematic embodiments of the present invention and the descriptions are used to explain the present invention, but do not limit the present invention.

[0017] Such as Figure 1, the present invention provides a cervical lesion resection device, which includes a branch pipe 1 that can extend into the cervical canal. A hollow inner pipe 2 that can move axially along the branch pipe is arranged inside the branch pipe. The inner pipe 2 can be driven to move in a piston-like manner. An electric knife 3 that can move axially along the inner pipe is arranged on the inner pipe. The electric knife extends out of or retracts into the branch pipe through a driving mechanism 4 arranged on the inner pipe. During implementation, the branch pipe can be regarded as a fixed fulcrum of the non-electrified cervical canal. It can rotate 360 degrees with the cervical canal as the fulcrum, and the extending end of the branch pipe is spherical to avoid causing damage. The electric knife is a charged working coil, and the resection radius and length of the electric knife can be accurately set by the degree of its extending out of or retracting into the branch pipe. Thus, a resection device in a similar circular pattern with the branch pipe as the fulcrum and the electric knife as the rotating arm is formed, so as to accurately resect the diseased tissue.

[0018] In the present invention, a pin shaft 5 is radially arranged at the end of the inner pipe deviating from the axis of the inner pipe to ensure that the force in the axial direction of the inner pipe axis can form a moment on the pin shaft. The electric knife is installed on the pin shaft, and the driving mechanism drives the electric knife to rotate around the pin shaft. Specifically, one end of the electric knife is sleeved on the pin shaft near the end position. An opening 11 is axially arranged on the side wall of the branch pipe. When the driving mechanism drives one end of the electric knife, the electric knife rotates around the pin shaft under the action of the moment, and the other end of the electric knife extends out of or retracts into the branch pipe from the opening, which can not only ensure that an included angle can be formed between the electric knife and the branch pipe, but also make it convenient for the branch pipe to extend into or withdraw from the cervical canal after the electric knife retracts into the branch pipe, making the surgical operation simpler and more convenient. During implementation, in order not to interfere with the rotation of the electric knife, a strip-shaped opening 21 should be axially arranged at the end of the inner pipe to ensure that the electric knife can rotate 90 degrees around the pin shaft without interfering with the inner pipe.

[0019] Preferably, the driving mechanism 4 includes a plunger 41 and a strong spring 42 arranged in the inner cavity of the inner pipe. One end of the strong spring is connected to the bottom of the plunger, and the other end is connected to the end of one end of the electric knife. The plunger moving axially along the inner pipe deforms the strong spring, and the deformed strong spring drives one end of the electric knife to rotate around the pin shaft. Initially, since the pin shaft is fixed on the inner pipe, as the plunger moves, the strong spring is compressed, thereby generating a large elastic force on one end of the electric knife. This elastic force generates a moment on the pin shaft, so that the electric knife can rotate around the pin shaft. At this time, the other end of the electric knife rotates and extends out of the branch pipe, and the included angle between it and the branch pipe becomes larger and larger. After the diseased tissue is resected, the plunger moves in the reverse direction, the strong spring gradually returns to its original state, the elastic force at one end of the electric knife becomes smaller, the moment on the pin shaft becomes smaller, the other end of the electric knife retracts into the branch pipe from the opening, and then withdraws from the branch pipe, and the operation is completed. The present invention adopts a strong spring. On the one hand, it can ensure that the electric knife can extend out of and retract into the branch pipe, facilitating the surgical operation; on the other hand, when the position of the electric knife is fixed, it has a certain toughness during the process of resection of the diseased tissue, which can reduce damage.

[0020] Preferably, the plunger is a threaded plug, and an internal thread is formed in the inner cavity of the inner tube. The plunger moves axially along the inner cavity of the inner tube by means of the cooperation between its external thread and the internal thread, that is, the plunger is moved by rotating or reversely rotating, so as to compress the powerful spring or reset the powerful spring. During the implementation process, a connecting rod 43 is fixedly arranged at the top of the plunger, and a rotating handle (not shown in the figure) for hand holding is arranged at the end of the connecting rod. During the operation, the operator only needs to hold the rotating handle with the hand and rotate it to drive the plunger to rotate; and a scale is arranged axially on the connecting rod to ensure that the operator accurately masters the screwing stroke of the plunger thread. It can be seen that the present invention can accurately control the stroke of the plunger by means of thread cooperation, thereby controlling the elastic force of the pressure spring, further accurately controlling the rotation angle of the electric knife, and then accurately calculating the resection radius and length of the electric knife through the length of the electric knife and the included angle between the electric knife and the branch pipe, so as to achieve the purpose of accurately removing the diseased tissue.

[0021] A groove 44 is formed at the bottom of the plunger of the present invention, and a top plate 45 is arranged in the groove in a radial clearance fit manner, and one end of the powerful spring abuts against the top plate. During the operation process, since the plunger will rotate, the top plate can be ensured not to rotate with the plunger through the top plate in clearance fit. Preferably, several balls 46 are arranged between the top plate and the bottom of the groove. During the implementation process, a frictional force is formed between the top plate and the groove under the action of the powerful spring, and the use of balls can reduce the frictional force to ensure that the top plate does not rotate with the plunger. During the operation, the electric knife can be initially moved to the diseased part by the overall movement of the inner tube, and then according to the determined diseased resection range, the plunger is rotated to make the electric knife rotate around the pin shaft to a specified angle, and the resection range of the electric knife is accurately calculated, and then the electric knife is driven to rotate 360 degrees around the branch pipe by rotating the branch pipe, so as to realize the precise conical resection of the diseased tissue.

Claims

1. A cervical lesion resection device, including a branch tube that can extend into the cervical canal, characterized in that: A hollow inner tube capable of moving axially along the branch pipe is arranged in the branch pipe. An electric knife capable of moving axially along with the inner tube is arranged on the inner tube. The electric knife extends out of or retracts into the branch pipe through a driving mechanism arranged on the inner tube. A pin shaft is arranged radially deviating from the axis of the inner tube at the end of the inner tube, and the electric knife is mounted on the pin shaft. The driving mechanism drives the electric knife to rotate around the pin shaft. One end of the electric knife near the end is sleeved on the pin shaft. An opening is axially arranged on the side wall of the branch pipe. When the driving mechanism drives one end of the electric knife, the other end of the electric knife extends out of or retracts into the branch pipe from the opening. The driving mechanism includes a plunger and a strong spring arranged in the inner cavity of the inner tube. One end of the strong spring is connected to the bottom of the plunger, and the other end is connected to the end of one end of the electric knife. The plunger moving axially along the inner tube deforms the strong spring, and the deformed strong spring drives one end of the electric knife to rotate around the pin shaft. The extending end of the branch pipe is spherical.

2. The cervical lesion resection device according to claim 1, characterized in that: The plunger is a threaded plug, and an internal thread is formed in the inner cavity of the inner tube. The plunger axially moves along the inner cavity of the inner tube by means of the cooperation of its external thread and the internal thread.

3. The cervical lesion resection device according to claim 2, wherein: A groove is formed at the bottom of the plunger, and a top plate is arranged in the groove in a radial clearance fit manner. One end of the strong spring abuts against the top plate.

4. The cervical lesion resection device according to claim 3, wherein: Several balls are arranged between the top plate and the bottom of the groove.

5. The cervical lesion resection device according to claim 2 or 3 or 4, characterized in that: A connecting rod is fixedly arranged at the top of the plunger, and a rotating handle for hand-holding is arranged at the end of the connecting rod.

6. The cervical lesion resection device according to claim 5, wherein: A scale is arranged axially on the connecting rod.

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