CN111096774B - Minimally invasive surgical tissue clamp - Google Patents

Abstract

The invention discloses a minimally invasive surgical tissue forceps, belonging to the field of medical instruments, comprising a handle, a connection part connected with the handle, and an operation part connected with the connection part, the handle controls the operation part through the connection part, and the connection The connecting rod includes a connecting pipe and a connecting rod inside the connecting pipe. The connecting pipe is fixedly connected with the handle and the operating part, respectively. The connecting rod can be driven to move by the handle to drive the operating part to open and close the tissue forceps.

Description

A minimally invasive surgical tissue clamp

technical field

The present invention relates to the field of tissue clamps.

Background technique

Tissue forceps are also called rat-tooth forceps (Allis). The compression of the tissue is lighter than that of the vascular forceps, so it is generally used to clamp the soft tissue, which is not easy to slip. contaminated.

The existing tissue forceps usually do not have a buffering effect. When applied to some fields, such as surgical robots, it is easy to cause excessive damage to the tissue. In some improved solutions, the spring is used for buffering, but the spring is in a compressed state for a long time. , its elasticity will change, affecting the cushioning effect.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a minimally invasive surgical tissue forceps, comprising a handle, a connection part connected to the handle, and an operation part connected to the connection part, the handle controls the operation part through the connection part, and the connection part includes a connection part. A pipe and a connecting rod located inside the connecting pipe, the connecting pipe is respectively fixedly connected with the handle and the operating part, the connecting rod can be driven to move by the handle and then drive the operating part to open and close the tissue forceps, characterized in that the connecting rod It includes a driven rod, an active rod, and a buffer tube. The driven rod is connected to the operating part, the active rod is connected to the handle, and the buffer tube is connected to the active rod and the driven rod. The active rod includes an active rod body and an active piston at the end of the active rod body. The driven rod includes a driven rod body and a driven piston at the end of the driven rod body. The driving rod body and the driving piston are ball-joined, and the driven rod body and the driven piston are ball-joined. The driving piston and the driven piston are in two directions of the buffer tube respectively. Clip into the buffer tube, the active piston, the driven piston and the tube wall of the buffer tube form a sealed cavity, the connecting rod also includes a piston connecting rod to connect the active piston and the driven piston, and the piston connecting rod restricts the active piston and the driven piston. With the back of the piston running, the air pressure in the sealed cavity is greater than atmospheric pressure and can be fixed.

As an improvement, the driven piston is provided with a first movable cavity, the active piston is provided with a second movable cavity, and the two ends of the piston connecting rod are respectively provided with a first sliding block and a second sliding block , the first sliding block and the second sliding block are respectively clamped into the first movable cavity and the second movable cavity to limit the backward movement of the driving piston and the driven piston.

As an improvement, the sealing cavity is communicated with a pressure regulating device.

As an improvement, the pressure regulating device includes:

The air supply cavity is communicated with the sealing cavity through the connecting air pipe, and the air supply cavity is also connected with an air intake pipe for air intake and outlet, and an air pump is arranged on the air intake pipe;

Regulating cavity, the internal pressure of which is set;

The connecting pipe is connected to the adjustment cavity and the air supply cavity at both ends respectively. The connecting pipe is provided with a solvent to block the adjustment cavity and the air supply cavity. When the liquid level rises, it can trigger the sensing component. The sensing component is connected with a controller. The controller is connected to the air pump located on the intake pipe. The sensing component is triggered to control the air pump through the controller to deflate the air supply chamber. Or supply air to adjust the pressure of the air supply chamber.

As an improvement, the sensing assembly includes a floating member, a magnet, a positioning member and a spring, the floating member floats on the liquid surface of the solvent, the floating member is connected with a magnet, and the connecting air pipe is provided with the ventilation positioning member, A spring is located between the retainer and the magnet to hold the magnet.

As an improvement, the pressure regulating device includes a pressure sensor located in the air supply chamber, the pressure sensor is connected to a controller, the controller is connected to the air pump, and the controller controls the air pump according to the pressure detected by the pressure sensor, thereby maintaining the air supply The pressure in the cavity is stable.

As an improvement, the end of the buffer pipe is provided with a baffle plate to fix the driving piston and the driven piston to prevent the driving piston and the driven piston from separating from the buffer pipe.

As an improvement, the buffer tube is provided with an air filling port so that air can be added to the sealed cavity.

Description of drawings

Fig. 1 is the structure schematic diagram of the present invention

Figure 2 is a schematic diagram of a connecting rod;

Figure 3 is a schematic diagram of a connecting rod;

Figure 4 is a schematic diagram of a movable cavity;

Fig. 5 is the schematic diagram of the operation part;

Fig. 6 is the schematic diagram of operation part;

7 is a schematic diagram of a pressure regulating device;

Figure 8 is a schematic diagram of a sensing assembly;

FIG. 9 is a schematic diagram of another embodiment of another pressure regulating device;

Figure 10 is a cross-sectional view of a buffer tube;

Marked in the figure: 100-handle, 110-button, 120-handle, 200-connecting part, 210-connecting pipe, 211-air filling channel, 220-connecting rod, 221-slave rod, 2211-slave piston , 2212-first active cavity, 222-active rod, 2221-active piston, 2222-second active cavity, 223-buffer tube, 2231-baffle plate, 224-piston connecting rod, 2241-first slider, 2242-Second slider, 2243-Link, 300-Operating part, 310a-First clamp block, 310b-Second clamp block, 320-Hinged head, 330a-First runner, 330b-Second runner, 340a-first driving rod, 340b-second driving rod, 350-movable plate, 400-pressure adjusting device, 410-air supply chamber, 411-connecting air pipe, 412-air intake pipe, 420-adjusting chamber, 430-connecting pipe , 440-solvent, 450-sensing assembly, 451-floating piece, 452-magnet, 453-positioning piece, 454-spring, 455-sensing piece, 460-controller, 470-air pump, 480-pressure sensor, 490- controller.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , the present invention provides a minimally invasive surgical tissue forceps, comprising a handle 100, a connecting portion 200 connected to the handle, and an operating portion 300 connected to the connecting portion, and the handle controls the operating portion 300 through the connecting portion The connecting part includes a connecting pipe 210 and a connecting rod 220 located inside the connecting pipe. The connecting pipe is fixedly connected with the handle and the operating part, respectively. The connecting rod can be driven to move by the handle and then drive the operating part to open and close the tissue forceps. , the operation part extends into the human body for operation, and the operation part can be surgical instruments such as application forceps, electrocoagulation forceps, and surgical forceps.

As shown in Figures 2-4, the connecting rod includes a driven rod 221, an active rod 222, and a buffer tube 223. The driven rod is connected to the operating part 300, the active rod is connected to the handle 100, and the buffer pipe is connected to the driving rod and the The driven rod, the driving rod includes a driving rod body and a driving piston 2221 located at the end of the driving rod body, the driven rod includes a driven rod body and a driven piston 2211 located at the end of the driven rod body, the driving rod body and the driving piston are ball-joined, the driven rod body and The driven piston is ball-connected, the driving piston and the driven piston are respectively stuck into the buffer pipe in two directions of the buffer pipe, and the pipe wall of the driving piston, the driven piston and the buffer pipe encloses a sealed cavity, and the driving piston and the The driven piston is in close contact with the buffer tube to form a sealed cavity. The driving piston and the driven piston are preferably rubber or the like, or can be metal or plastic. The contact surface between the piston and the buffer tube is sealed with rubber or the like. The active rod body and the active piston are ball-connected, and the driven rod body and the driven piston are ball-connected, which can make the rod body and the piston rotate freely with each other, the position of the piston and the buffer tube can be fixed, and the swing of the rod body will not affect the piston, thereby making The piston can have good sealing performance with the buffer tube and at the same time enable the piston to move relative to the buffer tube. If the rod body and the piston are rigidly connected, the deviation of the position of the rod body will cause the piston to follow the deviation, the piston and the buffer tube will not be able to combine well, and the piston will not be able to move relative to the buffer tube. The connecting rod also includes a piston connecting rod 224 to connect the driving piston and the driven piston. The piston connecting rod restricts the driving piston and the driven piston from moving backwards. The air pressure in the sealing cavity is greater than atmospheric pressure and can be fixed. The driven piston is provided with a first movable cavity 2212, the active piston 2221 is provided with a second movable cavity 2222, and the two ends of the piston connecting rod are respectively provided with a first sliding block 2241 and a second sliding block 2242. Between the two sliding blocks is a connecting rod 2243, the first sliding block and the second sliding block are respectively clamped into the first movable cavity and the second movable cavity to limit the backward movement of the driving piston and the driven piston.

As shown in FIG. 10 , in the present invention, the sealing cavity is applied with a pressure greater than atmospheric pressure. Due to the pulling action of the connecting rod, the two pistons will not move backwards, so the driving rod and the driven rod of the present invention are subject to the sealing cavity. The effect of extrusion can act on the connecting rod 220 and can provide a certain rigidity. Further, when the connecting rod 220 is subjected to a large pressing force, as shown in FIG. 4 , the driven piston will move relative to the active piston, thereby providing a buffer force and preventing excessive damage to human tissue by the operation part of the clamp.

In one embodiment, both pistons can move relative to the buffer tube, so both pistons can be squeezed simultaneously. In another embodiment, the active rod is rigidly connected to the buffer tube (or integrally formed), and when the connecting rod is subjected to a large extrusion force, the driven rod moves relative to the active rod, which can provide a certain buffering effect.

In the present invention, an air filling port is provided on the buffer tube to be able to add air to the sealing cavity, so the sealing cavity can be inflated when necessary, and the air filling device is conventional. However, when the sealing cavity of the present invention is squeezed by the two pistons, the air pressure in the sealing cavity will rise sharply, resulting in an increase in the pressing force of the sealing cavity on the two pistons, and the buffering effect achieved by the clamp will be increased. effect will be affected. Therefore, in a more preferred solution, when the piston is squeezed, the present invention makes the pressure of the sealed cavity constant. Specifically, the sealed cavity communicates with the pressure regulating device 400 . The end of the buffer pipe is provided with a baffle plate (2231) to fix the driving piston and the driven piston to prevent the driving piston and the driven piston from separating from the buffer pipe.

In one embodiment, as shown in FIG. 7 , the pressure regulating device includes: an air supply chamber 410 , an adjustment chamber 420 , and a connecting pipe 430 , and the air supply chamber 410 communicates with the sealing cavity through the connecting air pipe 411 , and the air supply The cavity is also connected with an air intake pipe 412 for air intake and outflow, and an air pump is provided on the air intake pipe; the pressure in the adjustment cavity 420 is set, which is sealed, and specifically can be provided with an air filling device and a pressure display device. The two ends of the connecting pipe 430 are respectively communicated with the adjustment cavity and the air supply cavity. The connecting pipe is provided with a solvent 440 to block the adjustment cavity and the air supply cavity. When the liquid level of the solvent rises, it can trigger the sensing assembly 450, the sensing assembly is connected with the controller 460, and the controller is connected with the air pump 470 located on the air inlet pipe 412, and the sensing assembly is triggered to control the air pump through the controller to control the supply. The air cavity is deflated or supplied to adjust the pressure of the air supply cavity, so that the pressure in the sealed cavity is constant.

In the present invention, the pressure adjusting device can be installed in the handle, which is communicated with the sealing cavity through the connecting air pipe, and the handle will rotate freely when it moves, causing the solvent to flow. Therefore, in a more preferred solution, as shown in Figure 8 As shown, the sensing assembly 450 includes a floating member 451, a magnet 452, a positioning member 453 and a spring 454. The floating member floats on the liquid surface of the solvent, and the floating member is connected with the magnet 452. The ventilating positioning member 453, the spring 454 is located between the positioning member and the magnet to fix the magnet, wherein the floating member can not only make the magnet float, but also can seal the solvent, the floating member is foam and other materials, and the solvent can choose water, alcohol lamp , you can also choose a solution with high viscosity, etc.

In another embodiment, the pressure regulating device includes a pressure sensor 480 located in the air supply chamber, the pressure sensor is connected to a controller 490, the controller is connected to the air pump 470, and the controller is based on the pressure detected by the pressure sensor. In order to control the air pump, and then maintain the pressure in the air supply chamber stable.

Claims (7)

1. A minimally invasive surgery tissue forceps comprises a handle (100), a connecting part (200) connected with the handle and an operating part (300) connected with the connecting part, wherein the handle controls the operating part (300) through the connecting part, the connecting part comprises a connecting pipe (210) and a connecting rod (220) positioned in the connecting pipe, the connecting pipe is respectively fixedly connected with the handle and the operating part, the connecting rod can be driven by the handle to move and further drive the operating part to open and close the tissue forceps, the minimally invasive surgery tissue forceps is characterized in that the connecting rod comprises a driven rod (221), a driving rod (222) and a buffer pipe (223), the driven rod is connected with the operating part, the driving rod is connected with the handle, the buffer pipe is connected with the driving rod and the driven rod, the driving rod comprises a driving rod body and a driving piston (2221) positioned at the tail end of the driving rod body, the driven rod comprises a, the driving rod body is connected with the driving piston ball, the driven rod body is connected with the driven piston ball, the driving piston and the driven piston are respectively clamped into the buffer tube in two directions of the buffer tube, a sealed cavity is formed by the driving piston, the driven piston and the tube wall of the buffer tube in a surrounding mode, the connecting rod further comprises a piston connecting rod (224) for connecting the driving piston with the driven piston, the piston connecting rod limits the driving piston and the driven piston to move in a back-to-back mode, and the air pressure in the sealed cavity is larger than the atmospheric pressure and can be fixed;

driven piston in be equipped with first activity cavity (2212), initiative piston (2221) in be equipped with second activity cavity (2222), the both ends of piston connecting rod are equipped with first slider (2241) and second slider (2242) respectively, first slider and second slider are blocked respectively in first activity cavity and the second activity cavity with the motion dorsad of restriction initiative piston and driven piston.

2. The minimally invasive surgical tissue forceps according to claim 1, wherein the sealed cavity is in communication with a pressure regulating device (400).

3. The minimally invasive surgical tissue forceps according to claim 2, wherein the pressure regulating device comprises:

the air supply cavity (410) is communicated with the sealed cavity through a connecting air pipe (411), the air supply cavity is also connected with an air inlet pipe (412) for air inlet and outlet, and an air pump is arranged on the air inlet pipe;

a regulation chamber (420) in which a pressure is set;

connecting pipe (430), its both ends respectively with adjust the chamber and feed air chamber intercommunication, be equipped with solvent (440) in the connecting pipe in order to block and adjust chamber and feed air chamber, be equipped with sensing component (450) in the connecting pipe, the pressure change in the feed air chamber, it can trigger sensing component (450) when the solvent liquid level risees in the connecting pipe, sensing component is connected with controller (460), the controller is connected with air pump (470) that is located intake pipe (412), sensing component is triggered and is passed through controller control air pump and in order to deflate or the gas transmission and then adjust the pressure in feed air chamber to the feed air chamber.

4. The minimally invasive surgical tissue forceps according to claim 3, wherein the sensing assembly (450) comprises a floating member (451), a magnet (452), a positioning member (453) and a spring (454), the floating member floats on the solvent level, the magnet (452) is connected to the floating member, the positioning member (453) is arranged on the connecting air pipe, and the spring (454) is arranged between the positioning member and the magnet to fix the magnet.

5. The minimally invasive surgical tissue forceps according to claim 2, wherein the pressure regulating device includes a pressure sensor (480) located in the air supply chamber, the pressure sensor is connected to a controller (490), the controller is connected to the air pump (470), and the controller controls the air pump according to the pressure detected by the pressure sensor, so as to maintain the pressure in the air supply chamber stable.

6. The minimally invasive surgical tissue forceps according to claim 1, wherein the buffer tube end is provided with a baffle (2231) to secure the driving piston and the driven piston against disengagement from the buffer tube.

7. The minimally invasive surgical tissue forceps according to claim 1, wherein the buffer tube is provided with a gas filling port to allow gas to be filled into the sealed cavity.

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