CN213758529U

CN213758529U - Opening and closing type electric cutting loop

Info

Publication number: CN213758529U
Application number: CN202022694280.4U
Authority: CN
Inventors: 雷鸣
Original assignee: First Affiliated Hospital of Guangzhou Medical University
Current assignee: First Affiliated Hospital of Guangzhou Medical University
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-07-23
Anticipated expiration: 2030-11-19

Abstract

The application relates to the technical field of medical instruments, in particular to an opening and closing type electric cutting loop, which comprises a guide rod and two cutting arms which are connected together, wherein a first electric cutting wire is arranged inside the guide rod and the cutting arms; a second electric shredding wire connected with the first electric shredding wire is arranged between the two cutting arms, the second electric shredding wire comprises a first branch electric shredding wire and a second branch electric shredding wire which are rotatably connected, and a spring is arranged between the two cutting arms. The tissue cutting machine can enlarge the effective cutting width of single cutting of the electric cutting loop, further effectively accelerate the operation speed, reduce the operation time and reduce the bleeding amount of a wound surface, thereby improving the work efficiency of tissue cutting and reducing the work intensity of an operator, being beneficial to improving the safety of the operation, and effectively solving the technical problems of long time consumption, large bleeding amount and low work efficiency of the tissue cutting of the electric cutting loop in the prior art.

Description

Opening and closing type electric cutting loop

Technical Field

The application relates to the technical field of medical instruments, in particular to an opening and closing type electric cutting loop.

Background

Transurethral resection of prostate and bladder tumor are the most common surgical procedures in urology. Performing this procedure requires the use of a transurethral resectoscope, which is the most common intraluminal urological surgical instrument used in urology. When the resectoscope is used for transurethral resection, a doctor needs to insert the resectoscope into a bladder or a posterior urethra through the urethra, an operation cavity of the resectoscope can extend out and retract a resectoscope loop, and the resectoscope loop is the most important cutting tool for tissue cutting. The electrodes of the electric cutting loop are connected to a special current generator, so that the electric cutting loop is used for carrying out charged cutting operation, and the current passing through the electric cutting loop at the head end of the electric cutting loop is contacted with the tissues in the human urinary tract cavity to generate high temperature or plasma for carrying out tissue cutting.

Current electrosurgical tabs have a common design, and are all of an invariable cutting width, i.e., the size of the electrosurgical loop of the electrosurgical tab is fixed, so that the maximum width of the tissue to be resected is fixed each time. Because the loop extends from the lumen of the resectoscope, the maximum diameter of the loop must be smaller than the lumen diameter of the resectoscope, so the cut width (the width of the resectable tissue) of the loop is smaller. Therefore, the volume of the tissue block cut and removed every time is small, so that the transurethral resection operation usually needs to be repeated for dozens of times or even hundreds of times during the operation, and the repeated small-volume tissue cutting operation can increase the bleeding amount of the resection wound, prolong the operation time and increase the fatigue of doctors, and influence the safety and the effect of the operation.

Therefore, how to solve the problems of long time consumption, large bleeding amount and low working efficiency of the electric cutting loop for cutting the tissue becomes a technical problem to be solved urgently by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

In view of this, the present application aims to provide an open-close type electric cutting loop, which effectively solves the technical problems of long time consumption, large bleeding amount and low working efficiency of the electric cutting loop in the prior art for cutting tissue.

In order to achieve the purpose, the application provides the following technical scheme:

an opening-closing type electric cutting loop comprises a guide rod and two cutting arms which are connected together, wherein a first electric cutting wire is arranged inside the guide rod and the cutting arms; a second electric shredding wire connected with the first electric shredding wire is arranged between the two cutting arms, the second electric shredding wire comprises a first branch electric shredding wire and a second branch electric shredding wire which are rotatably connected, and a spring is arranged between the two cutting arms.

Preferably, in the above open-close type electrical haptic, a convex or concave member is disposed on a side of the first sub-electrical cutting filament adjacent to the second sub-electrical cutting filament, a concave or convex member is disposed on a side of the second sub-electrical cutting filament adjacent to the first sub-electrical cutting filament, and the convex and concave members are rotatably connected by a first rotating shaft.

Preferably, in the above open-close type electric cutter loop, first escape preventing members are provided at both ends of the first rotary shaft.

Preferably, in the above open-close type electric haptic, a first connecting member is disposed on a side of the first sub-electric cutting filament adjacent to the second sub-electric cutting filament, a second connecting member is disposed on a side of the second sub-electric cutting filament adjacent to the first sub-electric cutting filament, and the first connecting member and the second connecting member are rotatably connected by a second rotating shaft.

Preferably, in the above open-close type electric cutter loop, a second escape preventing member is provided at both ends of the second rotary shaft.

Preferably, in the above open-close type electric cutter tab, the second electric cutting wire is provided at an end of the cutting arm remote from the guide bar.

Preferably, in the above open-close type electric cutting loop, the second electric cutting filament is transitionally connected to the first electric cutting filament by an arc.

Preferably, in the above open-close type electric haptic, the cutting arm has a circular arc shape or a linear shape.

In the above open-close type electric haptic, the first sub-filament wire and the second sub-filament wire may have a circular arc shape or a linear shape.

Preferably, in the open-close type electric cutter loop described above, the connection ends of the first sub-filament wire and the second sub-filament wire each extend in a direction approaching the guide rod.

Compared with the prior art, the beneficial effects of this application are:

when the tissue cutting machine is used for single cutting, the cutting end of the electric cutting loop bounces off under the elastic force of the spring when extending out of the electric cutting mirror channel, so that the first branch electric cutting wire and the second branch electric cutting wire rotate, the distance between the two cutting arms is increased accordingly, the effective cutting width of the single cutting of the electric cutting loop is further enlarged, compared with the existing tissue block which is cut off by the electric cutting loop with an unchangeable cutting width, the tissue block which is cut off by the electric cutting loop in a single cutting mode is larger, the operation speed is further effectively accelerated, the operation time is shortened, the wound bleeding amount is reduced, the work efficiency of tissue cutting is improved, the work intensity of an operator is reduced, the safety of an operation is improved, and the technical problems that the long time is consumed for cutting the tissue by the electric cutting loop, the bleeding amount is large, and the work efficiency is low in the prior art are effectively solved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of a first open-close type electric cutting loop according to an embodiment of the present application;

FIG. 2 is an enlarged view of a junction between a first electrical dividing wire and a second electrical dividing wire of a first open-close type electrical cutting loop provided in an embodiment of the present application;

FIG. 3 is a schematic structural view of a second open-close type electric cutting loop according to an embodiment of the present application;

FIG. 4 is an enlarged view of a junction between a first electrical dividing wire and a second electrical dividing wire of a second open-close type electrical cutting loop provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a linear cutting arm of an open-close type electric cutting loop according to an embodiment of the present application.

In the figure:

the cutting device comprises a guide rod 1, a cutting arm 2, a first sub-cutting wire 3, a second sub-cutting wire 4, a convex connecting piece 51, a concave connecting piece 52, a first rotating shaft 53, a first anti-falling piece 54, a first connecting piece 61, a second connecting piece 62, a second rotating shaft 63, a second anti-falling piece 64 and a spring 7.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are used broadly and are defined as, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements, unless otherwise explicitly stated or limited. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

Current electrosurgical tabs have a common design, and are all of an invariable cutting width, i.e., the size of the electrosurgical loop of the electrosurgical tab is fixed, so that the maximum width of the tissue to be resected is fixed each time. Because the loop extends from the lumen of the resectoscope, the maximum diameter of the loop must be smaller than the lumen diameter of the resectoscope, so the cut width (the width of the resectable tissue) of the loop is smaller. Therefore, the volume of the tissue block cut and removed every time is small, so that the transurethral resection operation usually needs to be repeated for dozens of times or even hundreds of times during the operation, and the repeated small-volume tissue cutting operation can increase the bleeding amount of the resection wound, prolong the operation time and increase the fatigue of doctors, and influence the safety and the effect of the operation. Therefore, how to solve the problems of long time consumption, large bleeding amount and low working efficiency of the electric cutting loop for cutting the tissue becomes a technical problem to be solved urgently by those skilled in the art.

Referring to fig. 1-5, an embodiment of the present invention provides an electric cutting loop of an open-close type, which includes a guide rod 1 and two cutting arms 2 connected together, wherein a first electrical filament (not shown) is disposed inside the guide rod 1 and the cutting arms 2; a second electric shredding wire connected with the first electric shredding wire is arranged between the two cutting arms 2, the second electric shredding wire comprises a first sub electric shredding wire 3 and a second sub electric shredding wire 4 which are connected in a rotating mode, and a spring 7 is arranged between the two cutting arms 2.

In the embodiment, when the electric incision loop extends out of an operation cavity channel of the electric incision lens during single incision, two cutting arms 2 are spread due to elastic support of a spring 7 on the electric incision loop, so that the incision amplitude of the electric incision loop is obviously enlarged, the width of the excised tissue at each time is obviously increased, the excised tissue block at each time is obviously larger than the excised tissue block of the electric incision loop with an invariable incision amplitude, the tissue excision speed is greatly accelerated, the operation speed is obviously accelerated, the operation speed is improved, bleeding of a wound surface is reduced, and the operation safety is improved. After cutting, the electric cutting loop retracts into the operation cavity of the electric cutting mirror, at the moment, the two cutting arms 2 are pressed, the included angle is reduced, and the spring 7 is compressed. The effective cutting width of the electric cutter loop is controlled by controlling the length of the cutting arm 2 extending out of the operation cavity of the electric cutter, namely, the compression length of the spring 7 is adjusted by pressing different positions of the cutting arm 2 through the cavity wall of the operation cavity of the electric cutter, so that the effective cutting width of the electric cutter loop is controlled.

The beneficial effect of this application: when in single cutting, the cutting end of the electric cutting loop bounces off under the elastic force of the spring 7 when extending out of the electric cutting scope channel, so that the first branch electric cutting wire 3 and the second branch electric cutting wire 4 rotate, the distance between the two cutting arms 2 is increased, and the effective cutting width of the single cutting of the electric cutting loop is further enlarged.

Further, in this embodiment, a second electrical cutting wire is arranged at the end of the cutting arm 2 remote from the guide bar 1. More specifically, a first end of a first electric shredding wire inside the two cutting arms 2 is connected with a first electric shredding wire inside the guide rod 1, a second end of the first electric shredding wire inside the two cutting arms 2 is respectively connected with a first end of a first sub-electric shredding wire 3 and a first end of a second sub-electric shredding wire 4, and a second end of the first sub-electric shredding wire 3 and a second end of the second sub-electric shredding wire 4 extend oppositely and are rotatably connected; a spring 7 is arranged on the side of the second electric cutting wire close to the guide rod 1.

Further, in this embodiment, the second electrical cutting wire and the first electrical cutting wire are in arc transition connection. The second electric cutting wire and the first electric cutting wire which are in arc transition connection can prevent the non-pathological part in the cavity channel from being punctured by the electric cutting loop in the moving process, and can effectively reduce the stimulation to the surface of the cavity channel when the electric cutting loop extends into or out of the operation cavity channel of the electric cutting endoscope.

Further, in the present embodiment, the cutting arm 2 may have an arc shape as shown in fig. 1, or the cutting arm 2 may have a linear shape as shown in fig. 5. No matter the cutting arm 2 is arc-shaped or linear, the normal use of the electric incision is not affected, but the arc-shaped cutting arm 2 is preferred in the embodiment, and the convex surfaces of the two cutting arms 2 are arranged in a deviating way, so that the arc-shaped cutting arm 2 can effectively reduce the stimulation to the surface of the cavity when the electric incision is inserted into or extended out of the operation cavity of the electric incision lens.

Further, in the present embodiment, the first sub-cut wires 3 and the second sub-cut wires 4 may be circular arc-shaped or linear. No matter the first sub-electric cutting filament 3 and the second sub-electric cutting filament 4 are arc-shaped or linear, the normal use of the electric incision loop is not influenced, and the arc-shaped first sub-electric cutting filament 3 and the arc-shaped second sub-electric cutting filament 4 are preferably selected in the embodiment, so that the stimulation to the surface of the cavity channel when the electric incision loop extends into or out of the operation cavity channel of the electric incision endoscope can be effectively reduced.

Further, in the present embodiment, the connecting ends of the first and second partial electric wires 3 and 4 each extend in a direction close to the guide bar 1. The arrangement is convenient for the first sub-electric cutting wire 3 and the second sub-electric cutting wire 4 to be folded between the two cutting arms 2, and the situation that the first sub-electric cutting wire 3 and the second sub-electric cutting wire 4 are propped against the surface of a cavity channel in an operation to prevent an electric cutting loop from normally extending into the operation cavity channel can be avoided.

In the first embodiment, as shown in fig. 1 and fig. 2, a convex connector 51 extending in the length direction is arranged on one side of the first sub-cutting filament 3 close to the second sub-cutting filament 4, a concave connector 52 used in cooperation with the first sub-cutting filament 3 is arranged on one side of the second sub-cutting filament 4 close to the first sub-cutting filament 3, and the convex connector 51 and the concave connector 52 are rotatably connected through a first rotating shaft 53; or, a convex connector 51 extending along the length direction is arranged on one side of the second sub-electric cutting wire 4 close to the first sub-electric cutting wire 3, a concave connector 52 used in cooperation with the first sub-electric cutting wire 3 close to the second sub-electric cutting wire 4 is arranged on one side of the first sub-electric cutting wire 3, and the convex connector 51 and the concave connector 52 are connected in a rotating mode through a first rotating shaft 53. By arranging the convex connector 51 and the concave connector 52 which extend along the length direction and are connected in a rotating way, the effective connection length (namely the distance between the two cutting arms 2) of the second electric filament wire consisting of the first electric filament dividing wire 3 and the second electric filament dividing wire 4 can be adjusted, when the cutting end of the electric cutting loop extends out of the electric cutting mirror channel, the first electric filament dividing wire 3 and the second electric filament dividing wire 4 can rotate by utilizing the elasticity of the spring 7 and the two cutting arms 2 are enabled to be propped, and the effective cutting width of the single cutting of the electric cutting loop can be enlarged.

More specifically, the female connector 52 may be two side plates, a U-shaped groove is formed between the two side plates, the male connector 51 is located in the U-shaped groove, the first rotating shaft 53 penetrates through the through holes of the two side plates and the through hole of the male connector 51, the diameter of the first rotating shaft 53 is slightly smaller than that of the through hole, and the male connector 51 and the female connector 52 can be rotatably connected.

Further, in the present embodiment, both ends of the first rotating shaft 53 are provided with first anti-slip members 54, and the diameter of the first anti-slip members 54 is larger than that of the through hole of the male connector 51 (or the side plate). The first anti-slip part 54 can prevent the first rotating shaft 53 from slipping off the male connecting part 51 and the female connecting part 52, which is beneficial to ensuring the normal use of the electric cutting loop.

In a second embodiment, as shown in fig. 3 and 4, a first connecting member 61 extending in the length direction is disposed on a side of the first sub-cut filament 3 close to the second sub-cut filament 4, a second connecting member 62 extending in the length direction is disposed on a side of the second sub-cut filament 4 close to the first sub-cut filament 3, and the first connecting member 61 and the second connecting member 62 are rotatably connected by a second rotating shaft 63. By arranging the first connecting piece 61 and the second connecting piece 62 which extend along the length direction and are connected in a rotating manner, the effective connecting length (namely the distance between the two cutting arms 2) of the second electric filament composed of the first electric sub-filament 3 and the second electric sub-filament 4 can be adjusted, when the cutting end of the electric cutting loop extends out of the electric cutting mirror channel, the first electric sub-filament 3 and the second electric sub-filament 4 can be rotated by utilizing the elasticity of the spring 7 and the two cutting arms 2 are enabled to be propped open, and the effective cutting width of the single cutting of the electric cutting loop can be enlarged.

Further, in the present embodiment, both ends of the second rotating shaft 63 are provided with second anti-release members 64, and the diameter of the second anti-release members 64 is larger than that of the through hole of the first connecting member 61 (or the second connecting member 62). The second anti-dropping element 64 can prevent the second rotating shaft 63 from dropping from the first connecting element 61 and the second connecting element 62, which is beneficial to ensuring the normal use of the electric cutter loop.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The opening-closing type electric cutting loop is characterized by comprising a guide rod and two cutting arms which are connected together, wherein a first electric cutting wire is arranged inside the guide rod and the cutting arms; a second electric shredding wire connected with the first electric shredding wire is arranged between the two cutting arms, the second electric shredding wire comprises a first branch electric shredding wire and a second branch electric shredding wire which are rotatably connected, and a spring is arranged between the two cutting arms.

2. The opening-closing type electric cutter loop according to claim 1 wherein a side of said first divided electric cutter wire adjacent to said second divided electric cutter wire is provided with a male or female connector, a side of said second divided electric cutter wire adjacent to said first divided electric cutter wire is provided with a female or male connector for cooperation, and said male and female connectors are rotatably connected by a first rotating shaft.

3. The opening-closing type electric cutter tab as claimed in claim 2, wherein first escape preventing members are provided at both ends of the first rotary shaft.

4. The opening-closing type electric cutter loop according to claim 1 wherein a first connecting member is provided on a side of said first divided electric cutter wire adjacent to said second divided electric cutter wire, a second connecting member is provided on a side of said second divided electric cutter wire adjacent to said first divided electric cutter wire, and said first connecting member and said second connecting member are rotatably connected by a second rotating shaft.

5. The opening-closing type electric cutter tab as claimed in claim 4, wherein second escape preventing members are provided at both ends of the second rotary shaft.

6. The open-close type electric cutter tab according to claim 1, wherein said second electric cutting wire is provided at an end of said cutting arm remote from said guide bar.

7. The opening-closing electric cutter tab according to claim 6, wherein the second electric filament wire is transitionally connected to the first electric filament wire in a circular arc.

8. The opening-closing type electric cutter tab according to claim 1, wherein the cutting arm has a circular arc shape or a linear shape.

9. The opening-closing type electric cutter loop according to claim 1, wherein the first sub-filament wire and the second sub-filament wire are arc-shaped or linear.

10. The opening-closing type electric cutter loop as claimed in any one of claims 1 to 9, wherein the connection ends of the first sub-filament wire and the second sub-filament wire each extend in a direction approaching the guide rod.