CN116158836A - Magnetic repulsion bipolar vascular closure instrument and jaw assembly thereof - Google Patents

Abstract

The invention discloses a magnetic repulsion type bipolar blood vessel closure device and its jaw assembly. The jaw assembly includes an upper jaw assembly and a lower jaw assembly. The upper jaw assembly has a first closing surface, and the first closing surface There is a first slit on the top; the lower jaw assembly has a second closed surface, and the lower jaw assembly is provided with a cutting knife and an electromagnetic assembly that are arranged oppositely. One end of the cutting knife facing the electromagnetic assembly is magnetic, and on the second closed surface There is a second knife slot; and an electromagnetic conversion structure electrically connected with the electromagnetic component is included, and the electromagnetic conversion structure can control the magnetic pole of the magnetic component to switch between being the same as or different from the magnetic pole of the cutting knife. The cutting knife moves longitudinally, and when retracting after cutting off the tissue, the residual tissue on the cutting knife will not be brought into the hinge, which will not affect the normal closing of the jaw assembly, which improves the operating efficiency of the doctor and is easy to clean. More convenient.

Description

A magnetically repulsive bipolar blood vessel closure device and its jaw assembly

technical field

The invention belongs to the technical field of medical devices, and in particular relates to a magnetic repulsion bipolar blood vessel closure device and a jaw assembly thereof.

Background technique

The bipolar vessel closure device is a high-frequency surgical device widely used in the field of surgery, and is mainly composed of a bipolar device and an energy generating device. When working, the energy sounding device outputs a specific form of bipolar high-frequency energy, which acts on the human blood vessel tissue to close it through the bipolar device. After successful closure, rely on its built-in blade to push through the mechanical structure to cut off the vascular tissue that needs to be severed.

At present, the disconnection method of the bipolar closed blood vessel device on the market is basically controlled by trigger, and the axial thrust is applied to the cutting knife through mechanical transmission, so that the part with the cutting edge slides along the knife groove of the jaws to close the blood vessel or Organization breaks up. However, the length of the shaft of the bipolar closure device is generally relatively long, and the use of mechanical transmission will make the structure of the push knife more complicated and unstable, and because the push knife is pushed axially, after the blood vessel or tissue is cut During the retraction process, the tissue residue on the cutting knife will be brought into the inner hinge of the jaw, which will affect the normal closing of the jaw and is not easy to be cleaned. This problem is especially likely to affect the reliability of the instrument and reduce the Improve the efficiency of doctors' operations. In order to solve the above-mentioned technical problems, the present invention comes from this.

Contents of the invention

In view of at least one of the above technical problems, the purpose of the present invention is to provide a magnetic repulsion bipolar vessel closure device and its jaw assembly.

Technical scheme of the present invention is:

It is an object of the present invention to provide a jaw assembly which is part of a magnetically repulsive bipolar vessel closure device, comprising a closable upper jaw assembly and a lower jaw assembly, the upper jaw assembly having a When the lower jaw assembly is closed, there is a first sipe that is recessed in the direction away from the second closing surface on the first closing surface; the lower jaw assembly has a When the second closed surface is attached to the first closed surface, the lower jaw assembly is provided with a cutting knife and an electromagnetic assembly oppositely arranged, and the end of the cutting knife facing the electromagnetic assembly has magnetism. A second slit for the cutting knife to move in a direction perpendicular to the second closed surface is opened on the second closed surface;

It also includes an electromagnetic conversion structure electrically connected with the electromagnetic component, and the electromagnetic conversion structure can control the magnetic pole of the magnetic component to switch between being the same as or different from the magnetic pole of the cutting knife.

Another object of the present invention is to provide a magnetically repulsive bipolar blood vessel closure device, which includes a handle, a connecting rod assembly connected to the handle at one end, and a jaw assembly connected to the other end of the connecting rod assembly. The jaw assembly is the above-mentioned jaw assembly.

Compared with prior art, the advantage of the present invention is:

In the magnetic-repellent bipolar vessel closure device of the present invention, the cutting knife moves longitudinally, even if there is tissue remaining on the cutting knife, when the cutting knife retracts, the remaining tissue on the cutting knife will not be brought into the hinge, and It will not affect the normal closing of the jaw assembly, which improves the doctor's operating efficiency and is more convenient for cleaning; at the same time, the cutting knife is set in the jaw assembly, and there is no need to set a mechanical drive mechanism for driving the cutting knife on the connecting rod assembly and the handle. The structure is simpler.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

FIG. 1 is a schematic structural view of a jaw assembly of a bipolar vessel closure device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the longitudinal section structure of the jaw assembly in Fig. 1;

Fig. 3 is a structural schematic diagram of the first closed surface of the upper jaw assembly of the jaw assembly in Fig. 1 facing upward;

Fig. 4 is a structural schematic diagram of the lower jaw assembly of the jaw assembly in Fig. 1 with the second closed surface facing upwards (with the cutting knife omitted);

Fig. 5 is a schematic diagram of the longitudinal section structure of the jaw assembly in Fig. 4;

6 is a schematic structural view of the cutting knife of the lower jaw assembly of the jaw assembly according to the embodiment of the present invention;

Fig. 7 is a schematic diagram of the longitudinal section structure of the cutting knife in Fig. 6;

Fig. 8 is a schematic perspective view of the three-dimensional structure of the magnetic repulsion bipolar vessel closure device according to the embodiment of the present invention.

Among them: 1. jaw assembly; 11. upper jaw assembly; 110. first slit; 111. first electrode; 112. first connection end; 113. first connection groove; 114. first closing surface; 12 , the lower jaw assembly; 120, the second slit; 1200, the extension wall; 121, the second electrode; 122, the cutting knife; 1221, the knife body; 12211, the tip; 1222, the seat body; 123, electromagnetic assembly; 1231, magnetic core; 1232, energized coil; 124, second closing surface; 125, second connecting end;

Implementation

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are exemplary only, and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.

Example

Referring to Fig. 1 to Fig. 7, a jaw assembly according to an embodiment of the present invention is a part of a magnetically repulsive bipolar vessel closure device, including an upper jaw assembly 11, a lower jaw assembly 12 and an electromagnetic conversion structure (not shown in the figure). ), the upper jaw assembly 11 and the lower jaw assembly 12 can be closed or opened. For the convenience of description, the surface where the upper jaw assembly 11 contacts the lower jaw assembly 12 when it is closed is the first closing surface 114, corresponding to Yes, the surface of the lower jaw assembly 12 that is in contact with the first closing surface 114 when it is closed is the second closing surface 124 . On the first closed surface 114, there is a first knife groove 110 that is recessed away from the direction of the second closed surface 124, and the lower jaw assembly 12 is provided with a cutting knife 122 and an electromagnetic assembly 123 arranged oppositely, and the cutting knife 122 faces the electromagnetic assembly. One end of 123 is magnetic, and a second knife groove 120 is opened on the second closed surface 124 so that the cutting knife 122 can pass through during telescopic movement in a direction perpendicular to the second closed surface 124 . The electromagnetic component 123 is electrically connected to the electromagnetic conversion structure, and the electromagnetic conversion structure can control the magnetic pole of the electromagnetic component 123 to switch between the same or different magnetic poles of the cutting blade 122 . That is to say, by controlling the magnetic pole of the electromagnetic assembly 123 to be the same as that of the cutting knife 122, due to the principle that the magnetic poles of the same name repel each other, the cutting knife 122 will extend out of the second knife groove 120 toward the direction away from the electromagnetic assembly 123 to cut tissue. When the magnetic pole of the control electromagnetic assembly 123 is different from the magnetic pole of the cutting knife 122, the cutting knife 122 will retract to the second slit 120 toward the direction close to the electromagnetic assembly 123 due to the principle that the magnetic poles of different names attract each other. Inside. Compared with the prior art where the cutting knife 122 is pushed in the axial direction, the residual tissue on the cutting knife 122 will be brought into the inner hinge of the jaw due to the retraction after cutting the blood vessel or tissue, which will affect the closing of the jaw and make it difficult to clean. With the jaw assembly 1 of the embodiment of the present invention, the cutting knife 122 moves longitudinally, even if there is tissue remaining on the cutting knife 122, when the cutting knife 122 retracts, the remaining tissue on the cutting knife 122 will not be brought into the hinge It will not affect the normal closing of the jaw assembly 1, which improves the doctor's operating efficiency; it is also more convenient to clean up, and only needs to invert the second knife groove 120 or clean it with the help of blowing equipment; at the same time, the cutting knife 122 Located in the jaw assembly 1, there is no need to provide a mechanical drive mechanism for driving the cutting knife 122 on the connecting rod assembly 2 and the handle 3, and the overall structure is simpler.

According to some preferred embodiments of the present invention, as shown in Figure 6 and Figure 7, the cutting knife 122 includes a knife body 1221 and a seat 1222, the end of the knife body 1221 facing away from the seat 1222 is a tip 12211, and the seat 1222 is a permanent magnet Moreover, the magnetic poles at both ends of the base body 1222 in the length direction are different. The cross section of the first slit 110 is a triangular shape matching the tip 12211 of the cutter body 1221 and the second slit 120 has a gap with the side of the cutter body 1221 . The cutting knife 122 includes two parts, one is a knife body 1221 responsible for cutting off tissue, and the other is a magnetic seat 1222 that interacts with the electromagnetic assembly 123 . It should be noted that the gap between the second sipe 120 and the side of the knife body 1221 is not particularly limited. The gap between the second sipe 120 and the side of the knife body 1221 is to prevent the cutting knife 122 from cutting the tissue. The remaining tissue will not be touched by the second knife groove 120 during the retraction process and fall into the second knife groove 120, resulting in the need to turn the lower jaw assembly 12 upside down for cleaning or to use external cleaning equipment, that is to say, the residual tissue It will still remain on the cutting knife 122. When cleaning is required, only need to open the jaw assembly 1 and then control the cutting knife 122 to extend out of the second knife groove 120 for manual cleaning. Cleaning is very convenient. Further preferably, the cutting knife 122 is in an inverted T shape, that is to say, the two sides of the seat body 1222 respectively protrude outward from the outside of the knife body 1221 to form abutting against the limiting portion 12221 , and the notch of the second knife groove 120 An extension wall 1200 extends toward the center of the notch on both side walls, and the electromagnetic conversion structure controls the magnetic pole of the magnetic assembly to be the same as the magnetic pole of the base 1222 so that the cutting knife 122 extends out of the second knife slot 120 in a direction away from the magnetic assembly. When it is outside, the abutment limit portion 12221 abuts against the extension wall 1200 . With such an arrangement, the cutting knife 122 can be restricted in the second knife groove 120 , so as to prevent the cutting knife 122 from protruding out of the second knife groove 120 for cleaning and falling out when the jaw assembly 1 is opened.

According to some preferred embodiments of the present invention, as shown in FIG. 5 , the magnetic assembly includes a magnetic core 1231 extending along the direction of the second sipe 120 and an energized coil 1232 wound around the outer periphery of the magnetic core 1231, and the electromagnetic conversion structure is a magnetic control circuit (not shown) and by changing the current direction in the energized coil 1232 to change the magnetic pole of the magnetic assembly. According to the principle of generating a magnetic field around the energized wire, the electrodes of the energized coil 1232 are changed by changing the direction of the current, thereby changing the magnetic poles of the magnetic assembly. According to the right-hand spiral rule, the magnetic poles at both ends of the magnetic core 1231 are judged according to the flow direction of the current. When the magnetic assembly When the magnetic poles at the two ends of the cutting knife 122 and the magnetic poles at the two ends of the base body 1222 of the cutting knife 122 are the same in one-to-one correspondence, the two repel each other at this time, and the cutting knife 122 extends out of the second knife groove 120 toward the direction away from the electromagnetic assembly 123 to cut off the tissue , on the contrary, the cutting knife 122 moves in a direction close to the electromagnetic assembly 123 and retracts into the second knife groove 120 . It should be noted that the specific circuit structure of the magnetic control circuit is not described and limited in detail, and those skilled in the art know and can easily realize that the setting of the magnetic control circuit can be set on the jaw assembly 1 or on the handle 2 Or on the connecting rod assembly 3, the embodiment of the present invention is preferably arranged on the handle 2.

According to some preferred embodiments of the present invention, as shown in FIG. 2 , the upper jaw assembly 11 also includes a first electrode 111 located on the first closing surface 114, and the lower jaw assembly 12 also includes an electrode 111 located on the second closing surface 124. the second electrode 121 . Both the first electrode 111 and the second electrode 121 have escape gaps for the cutting knife 122 to pass through. The first electrode 111 and the second electrode 121 are components used to control the closing or opening of the upper jaw assembly 11 and the lower jaw assembly 12 , and the specific working principles thereof are not described or limited, and are prior art. As shown in the figure, both the first electrode 111 and the second electrode 121 are U-shaped.

According to some preferred embodiments of the present invention, as shown in FIGS. The cross-section of the second connecting end 125 is U-shaped, and the first connecting end 112 has a first connecting groove 113 extending obliquely along the length direction of the upper jaw assembly 11, and the second connecting end 125 has a groove along the lower jaw assembly. The second connecting groove 126 extending in the length direction of the mouth assembly 12 , the upper jaw assembly 11 and the lower jaw assembly 12 are hinged together through the connecting pieces movably connected in the first connecting groove 113 and the second connecting groove 126 . That is to say, the connecting member is located at one end corresponding to the first connecting groove 113 and the second connecting groove 126 when closed, and is located at the other end corresponding to the first connecting groove 113 and the second connecting groove 126 when opened.

The embodiment of the present invention also provides a magnetically repulsive bipolar blood vessel closure device, as shown in Figures 1 to 8, comprising a handle 2, a connecting rod assembly 3 and a jaw assembly 1, wherein one end of the connecting rod assembly 3 is connected to the handle 2, the jaw assembly 1 is connected to the other end of the connecting rod assembly 3, and the handle 2 is provided with an electromagnetic conversion structure. Since the jaw assembly 1 of the above-mentioned embodiment is provided, at least the beneficial effects of the jaw assembly 1 of the above-mentioned embodiment are provided, and details are not repeated here. In addition, since the cutting knife 122 is arranged in the lower jaw assembly 12, there is no need to arrange related mechanical driving components for controlling the cutting knife 122 in the connecting rod assembly 3 and the handle 2, and the overall structure is simpler.

It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principle of the present invention, and not to limit the present invention. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention shall fall within the protection scope of the present invention. Furthermore, it is intended that the appended claims of the present invention embrace all changes and modifications that come within the scope and metesques of the appended claims, or equivalents of such scope and metes and bounds.

Claims (8)

1. A jaw assembly which is a part of a bipolar vessel closing instrument and comprises an upper jaw assembly and a lower jaw assembly which can be closed, wherein the upper jaw assembly is provided with a first closing surface which is attached when the lower jaw assembly is closed, and a first knife slot which is concave back to the direction of the second closing surface is formed on the first closing surface; the lower jaw assembly is provided with a second closing surface which is attached to the first closing surface when the lower jaw assembly is closed, a cutting knife and an electromagnetic assembly which are arranged oppositely are arranged in the lower jaw assembly, one end of the cutting knife, which faces the electromagnetic assembly, is provided with magnetism, and a second knife slot for the cutting knife to move along the direction perpendicular to the second closing surface is formed in the second closing surface;

the electromagnetic conversion structure can control the magnetic pole of the magnetic component to be switched between the same or different magnetic poles of the cutting knife.

2. The jaw assembly of claim 1, wherein the cutting blade comprises a blade body and a seat body, wherein an end of the blade body facing away from the seat body is a tip, the seat body is a permanent magnet, and magnetic poles at two ends of the seat body in a length direction are different;

the cross section of the first knife groove is in a triangular shape matched with the tip end of the knife body, and a gap is reserved between the second knife groove and the side face of the knife body.

3. The jaw assembly according to claim 2, wherein both sides of the seat body protrude outward from the outer side of the cutter body, respectively, to be formed to abut against a limiting portion;

the two side walls of the notch of the second cutter groove extend towards the center of the notch respectively to form extension walls;

when the electromagnetic conversion structure controls the magnetic pole of the magnetic assembly to be the same as the magnetic pole of the base body, so that the cutting knife stretches out of the second knife slot towards the direction deviating from the magnetic assembly, the abutting limiting part abuts against the extending wall.

4. The jaw assembly according to claim 1 or 2, wherein the magnetic assembly comprises a magnetic core extending in the direction of the second sipe and an energizing coil wound around an outer periphery of the magnetic core, the electromagnetic converting structure being a magnetic control circuit and changing a magnetic pole of the magnetic assembly by changing a current guiding in the energizing coil.

5. The jaw assembly of claim 1, wherein the upper jaw assembly further comprises a first electrode disposed on the first closure surface and the lower jaw assembly further comprises a second electrode disposed on the second closure surface;

the first electrode and the second electrode are provided with avoiding gaps for the cutting knife to pass through.

6. The jaw assembly of claim 1, wherein the upper jaw assembly comprises a first connecting end, the lower jaw assembly comprises a second connecting end, the cross sections of the first connecting end and the second connecting end are U-shaped, a first connecting groove obliquely extending along the length direction of the upper jaw assembly is formed in the first connecting end, a second connecting groove extending along the length direction of the lower jaw assembly is formed in the second connecting end, and the upper jaw assembly and the lower jaw assembly are hinged together through connecting pieces movably connected in the first connecting groove and the second connecting groove.

7. A magnetic repulsion bipolar vessel closure device comprising a handle, a connecting rod assembly having one end connected to the handle, and a jaw assembly connected to the other end of the connecting rod assembly, wherein the jaw assembly is as claimed in any one of claims 1 to 6.

8. The magnetically permeable bipolar vascular closure device according to claim 7, wherein the electromagnetic switching structure is disposed within the handle.

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