A structure for controlling uniform pressure distribution

Abstract

The present invention discloses a structure for controlling uniform pressure distribution, which relates to the field of surgical instruments. The key points of the technical solution include a clamp arm and a tissue gasket, wherein the tissue gasket is movably connected to the clamp arm; the tissue gasket can deflect relative to the clamp arm in a direction toward its distal end or proximal end. During the operation, the tissue gasket will automatically deflect and move to adjust its position after contacting the clamped tissue, so as to make the closing pressure more uniform, achieve rapid cutting and coagulation, and improve the success rate of the first cutting and coagulation, so as to ensure the safety of the operation, and the structure is simple and easy to operate.

Description

Technical Field

[0001] The present invention relates to the field of surgical instruments, and more particularly to a structure for controlling uniform pressure distribution. Background Art

[0002] With the popularity of minimally invasive surgery, ultrasonic scalpels have become a conventional surgical instrument, widely used to cut soft tissues and safely coagulate blood vessels of 5 mm or less. Ultrasonic scalpels use an ultrasonic frequency generator to make the blade mechanically oscillate at a certain ultrasonic frequency, clamp the tissue through the jaws, vaporize its water molecules, break protein hydrogen bonds, and disintegrate cells, so that the tissue is cut or coagulated.

[0003] In the prior art, there is a common phenomenon of uneven closing pressure in the clamping parts of the jaws. The places with greater force are cut first, and due to the influence of the soft tissue that has not been cut, they will continue to work, thereby wearing out the gasket. At the same time, the success rate of the first cutting and coagulation operation is reduced, and the cutting and coagulation operation needs to be repeated, which reduces the progress of the operation and increases the risk of the operation.

[0004] The existing Chinese patent with publication number CN105934209A discloses an ultrasonic surgical instrument with staged clamping, which includes a clamping arm with a clamping pad, wherein the clamping arm can move in an ultrasonic blade to compress tissue between the clamping pad and the ultrasonic blade in two stages; the clamping arm is configured to compress the assembly using only the distal portion of the clamping pad during the first stage, and the clamping arm is configured to compress the tissue using the distal and proximal portions of the clamping pad during the second stage, so that tissue compression starts at the distal portion and then proceeds toward the proximal portion.

[0005] The ultrasonic surgical instrument in the above patent adopts a staged clamping structure of first far and then near, which can improve the problem of uneven closing pressure, but it increases the operation requirements and difficulty, affecting the efficiency of the operation. Summary of the invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a structure for controlling uniform pressure distribution, which can improve the problem of uneven closing pressure and has a simple structure, easy operation and a wide range of applications.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A structure for controlling uniform pressure distribution comprises a clamp arm and a tissue pad, wherein the tissue pad is movably connected to the clamp arm; the tissue pad can be deflected and moved relative to the clamp arm in a direction toward the distal end or the proximal end thereof.

[0009] Furthermore, the tissue pad can be deflected and moved relative to the clamp arm in a direction toward the distal end thereof, and can also be deflected and moved relative to the clamp arm in a direction toward the proximal end thereof.

[0010] Furthermore, a positioning pin is provided on the tissue gasket, and an adjustment slot cooperating with the positioning pin is provided on the clamp arm.

[0011] Furthermore, a positioning hole which is interference-fitted with the positioning pin is formed on the tissue gasket.

[0012] Furthermore, the adjustment groove is arc-shaped.

[0013] Furthermore, the adjustment groove includes two symmetrically arranged groove sections.

[0014] Furthermore, the adjustment groove is arranged to penetrate.

[0015] Furthermore, the tissue pad is step-shaped and includes an embedded portion; a receiving groove that cooperates with the embedded portion is provided in the clamp arm.

[0016] In summary, the present invention has the following beneficial effects:

[0017] 1. During the operation, the tissue gasket will automatically deflect and move to adjust its position after contacting the clamped tissue, so as to make the closing pressure more uniform, achieve rapid cutting and coagulation, and improve the success rate of the first cutting and coagulation to ensure the safety of the operation;

[0018] 2. The closing pressure is more uniform, the cutting speed is improved, the incision is smooth, and the phenomenon of cutting failure is eliminated;

[0019] 3. When the pressure is more uniform, it can avoid excessive loss of tissue gaskets and extend the service life of the device;

[0020] 4. Realize rapid cutting and coagulation, improve surgical progress and reduce surgical risks;

[0021] 5. The structure is simple. The tissue gasket has no specific initial position and does not need to be set with an elastic reset structure. During the operation, the tissue gasket will automatically adjust its position according to the uneven closing pressure;

[0022] 6. Easy to operate, the tissue gasket will automatically adjust its position, so there are no special requirements for the operation, just operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of a structure for controlling uniform pressure distribution in an embodiment;

[0024] Figure 2 is a schematic structural diagram of a clamp arm in an embodiment;

[0025] Figure 3 It is a structural schematic diagram of a tissue gasket in an embodiment;

[0026] Figure 4 It is a schematic diagram of the structure after the clamp arm is installed in the embodiment.

[0027] In the figure: 1. Clamp arm; 11. Receiving slot; 12. Adjusting slot; 2. Tissue gasket; 21. Embedding portion; 22. Positioning hole; 3. Positioning pin; 4. Fixed tube; 5. Movable tube; 6. Cutting head. DETAILED DESCRIPTION

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0030] Example:

[0031] A structure for controlling uniform pressure distribution, referring to Figures 1 to 4 , which includes a clamp arm 1 and a tissue gasket 2, and the tissue gasket 2 is movably connected to the clamp arm 1; the tissue gasket 2 can be deflected and moved relative to the clamp arm 1 in the direction toward its distal end or proximal end; the structure in this embodiment is applied to an ultrasonic scalpel, and the ultrasonic scalpel includes a fixed tube 4, a movable tube 5 and a knife head 6; the clamp arm 1 and the fixed tube 4, as well as the clamp arm 1 and the movable tube 5 are all hinged; in this embodiment, the proximal end refers to the end of the clamp arm 1 close to the fixed tube 4, and the distal end is the end of the clamp arm 1 away from the fixed tube 4; the movable tube 5 can drive the clamp arm 1 to rotate and approach the knife head 6 by axial movement to achieve a clamping action; during the clamping process, the tissue gasket 2 will automatically deflect and move to adjust its position after contacting the clamped tissue, so as to make the closing pressure more uniform, achieve rapid cutting and coagulation, and improve the success rate of the first cutting and coagulation, to ensure the safety of the operation, and it has a simple structure and is easy to operate.

[0032] Reference Figure 1 Preferably, in this embodiment, the tissue gasket 2 can be deflected and moved relative to the clamp arm 1 in the direction toward its distal end, and can also be deflected and moved relative to the clamp arm 1 in the direction toward its proximal end; the tissue gasket 2 can be deflected and moved in two opposite directions respectively, can cope with tissues of different forms, and has a wide range of applications.

[0033] Reference Figure 1Specifically, in this embodiment, a positioning pin 3 is provided on the tissue gasket 2, and an adjustment groove 12 cooperating with the positioning pin 3 is opened on the clamp arm 1; the positioning pin 3 is embedded in the adjustment groove 12, and the positioning pin 3 can move along the adjustment groove 12, and at the same time the tissue gasket 2 can rotate around the positioning pin 3, so that the deflection movement of the tissue gasket 2 can be realized; in this embodiment, both ends of the tissue gasket 2 are movable, so no matter whether the proximal pressure is large or the distal pressure is large, it can be automatically adjusted to make the pressure more uniform.

[0034] Reference Figures 1 to 3 Specifically, in this embodiment, a positioning hole 22 that is interference fit with the positioning pin 3 is opened on the tissue gasket 2, and the adjustment groove 12 is set through; at the same time, the tissue gasket 2 is stepped, and includes an embedded portion 21, and a receiving groove 11 that cooperates with the embedded portion 21 is provided in the clamp arm 1; in this embodiment, gaps are left at the top and both ends of the embedded portion 21, so that the tissue gasket 2 can be deflected and moved; the side wall of the embedded portion 21 and the inner side wall of the receiving groove 11 are transitionally matched, which allows the tissue gasket 2 to move while limiting the position.

[0035] Reference Figures 1 to 3 When installing the tissue gasket 2, its embedded part 21 is inserted into the accommodating groove 11 of the clamp arm 1, so that the positioning hole 22 is opposite to the adjusting groove 12, and then the positioning pin 3 is passed through the adjusting groove 12 and the positioning hole 22, so that the tissue gasket 2 and the clamp arm 1 can be connected flexibly, and the structure is simple; the positioning pin 3 and the positioning hole 22 are interference fit, on the one hand, it is convenient to install or replace the tissue gasket 2, and on the other hand, it can ensure that the positioning pin 3 does not fall off; in other optional embodiments, other structural forms can be adopted between the positioning pin 3 and the tissue gasket 2, or between the clamp arm 1, the tissue gasket 2 and the positioning pin 3, which are not limited here, as long as the tissue gasket 2 can be deflected and moved relative to the clamp arm 1; in other optional embodiments, the tissue gasket 2 can also be connected to the mounting plate or the mounting cover, and then the mounting plate or the mounting cover is connected to the clamp arm 1, which is not limited here.

[0036] Reference Figure 1In this embodiment, an adjustment groove 12 is used to increase the degree of freedom of the tissue gasket 2, which can cope with tissues of different forms and has a wide range of applications, making the closing pressure more uniform, and can achieve automatic adjustment, which is easy to operate; in this embodiment, the adjustment groove 12 includes two symmetrically arranged groove sections, so that the tissue gasket 2 can be deflected and moved in two opposite directions respectively; specifically, in this embodiment, the adjustment groove 12 is arc-shaped. In other optional embodiments, the adjustment groove 12 can also be adjusted, which is not limited here, for example, in a straight line or in a ︿ shape, and the ︿ shape includes two groove sections intersecting straight lines; the arc-shaped adjustment groove 12 provides more degrees of freedom for the tissue gasket 2 to make the closing pressure more uniform, and is conducive to the tissue gasket 2 automatically adjusting its position according to the pressure.

Claims

1. A structure for controlling uniform pressure distribution, comprising a clamp arm and a tissue gasket, characterized in that: The tissue pad is movably connected to the clamp arm; the tissue pad can be deflected and moved relative to the clamp arm in a direction toward the distal end or the proximal end thereof; The tissue pad is provided with a positioning pin, and the clamp arm is provided with an adjustment slot matched with the positioning pin; The positioning pin can move along the adjustment slot, and the tissue pad can rotate around the positioning pin, thereby achieving deflection movement of the tissue pad; The tissue pad is provided with a positioning hole which is interference-fitted with the positioning pin; The adjusting groove is arc-shaped.

2. A structure for controlling uniform pressure distribution, comprising a clamp arm and a tissue gasket, characterized in that: The tissue pad is movably connected to the clamp arm; the tissue pad can be deflected and moved relative to the clamp arm in a direction toward the distal end or the proximal end thereof; The tissue pad is provided with a positioning pin, and the clamp arm is provided with an adjustment slot matched with the positioning pin; The positioning pin can move along the adjustment slot, and the tissue pad can rotate around the positioning pin, thereby achieving deflection movement of the tissue pad; The tissue pad is provided with a positioning hole which is interference-fitted with the positioning pin; The adjusting groove comprises two groove sections which are symmetrically arranged.

3. The structure for controlling uniform pressure distribution according to claim 1 or 2, characterized in that: The tissue pad can be deflected and moved relative to the clamp arm in a direction toward the distal end thereof, and can also be deflected and moved relative to the clamp arm in a direction toward the proximal end thereof.

4. The structure for controlling uniform pressure distribution according to claim 1 or 2, characterized in that: The adjusting groove is arranged through.

5. The structure for controlling uniform pressure distribution according to claim 1 or 2, characterized in that: The tissue pad is in a step shape and includes an embedded portion; a receiving groove matching the embedded portion is arranged in the clamp arm.

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