Protection device for liver cancer ablation operation

Abstract

The invention relates to the technical field of liver cancer treatment equipment, in particular to a protection device for liver cancer ablation surgery, which comprises an insertion rod, an open-circuit balloon is connected to the insertion rod, an isolation balloon is sleeved on one side, close to the open-circuit balloon, of the insertion rod, the isolation balloon and the open-circuit balloon are communicated through a hose I, a hose II is connected to the open-circuit balloon, and the hose II is connected to the insertion rod. An inner threaded sleeve is connected to the open-circuit balloon, an outer threaded sleeve in threaded fit with the inner threaded sleeve is rotatably connected to the isolation balloon, and a positioning mechanism is arranged on the side, close to the isolation balloon, of the insertion rod and used for positioning the insertion rod. Through cooperation of the inner threaded sleeve and the outer threaded sleeve, the interval between the isolation balloon and the open-circuit balloon can be flexibly adjusted, the interval between the isolation balloon and the open-circuit balloon can be flexibly adjusted according to the size of a tumor, part of normal tissue can be prevented from being exposed in a high-temperature environment, and the unnecessary thermal damage risk is reduced; healthy tissues around the tumor can be effectively isolated, and the protection effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liver cancer treatment equipment, and particularly relates to a protection device for liver cancer ablation surgery. Background Art

[0002] With the progress of modern technology and oncology, in the past decade, microwave tumor ablation technology in China has made breakthrough progress. Microwave tumor ablation utilizes the thermal effect generated by the action of microwave energy on tissues. Within several minutes to more than ten minutes, the central temperature of the thermal field can reach above 100 °C, and the tumor tissue is coagulated and inactivated instantaneously under the high temperature, achieving the purpose of tumor ablation treatment. The microwave tumor ablation technique involves inserting a microwave ablation needle into the lesion of human tissues and continuously emitting microwave energy from its front end to perform the operation. Because of its high efficiency, small incision, and the controllability of the depth and scope of the action on tissues, it is applicable to the ablation surgery of solid tumors throughout the body.

[0003] Currently, during the process of liver cancer ablation, some tumor masses are close to the liver capsule, bile duct, or important blood vessels. During the ablation of these tumor masses using existing liver cancer ablation equipment, due to excessive heat, it is easy to damage the tissues adjacent to the liver capsule, bile duct, or important blood vessels, resulting in incomplete ablation.

[0004] After retrieval, a Chinese patent with the patent publication number CN110251230A, a protection device for liver cancer ablation surgery, includes a catheter, a sheath, an opening mechanism, and an isolation mechanism. The cavity inside the catheter is divided by a partition into a sheath cavity with both ends open at the front and back and two water injection cavities with both ends closed at the front and back. The front end of the catheter is a soft conical structure, and two water injection ports respectively communicating with the two water injection cavities are provided on the side wall of the catheter; the front end of the sheath is conical, and the sheath is slidably installed in the sheath cavity. During puncture, the rear end of the sheath slides to the rear end of the sheath cavity and is positioned, and its front end inserts into the sheath cavity to expand the front end of the catheter; the opening mechanism and the isolation mechanism are respectively fixedly installed on the catheter at intervals along the front and back directions, and at least two water injection holes respectively communicating with one of the water injection cavities and the opening mechanism and the other water injection cavity and the isolation mechanism are provided on the side wall of the catheter.

[0005] Although the above-mentioned patent can protect the intestinal tract by injecting water into the open balloon and the isolation balloon to make them bulge, there is a non-adjustable fixed interval space between the open balloon and the isolation balloon in the above-mentioned patent, and the fixed interval space cannot be adjusted according to the actual tumor size. If the interval space is too large, it may cause some normal tissues to be exposed to the high-temperature environment, increasing the risk of unnecessary thermal damage; on the contrary, if the interval is too small, it may not be able to effectively isolate the healthy tissues around the tumor. In addition, the above-mentioned patent does not provide a positioning structure, and during the breathing process of the human body, the abdomen will also rise and fall, and the protection device is prone to shift with the rise and fall of the abdomen, resulting in an enlarged wound surface and affecting postoperative recovery. Summary of the Invention

[0006] The purpose of the present invention is to provide a protection device for liver cancer ablation surgery, which can flexibly adjust the balloon interval according to the tumor size and can be stably inserted into the abdomen.

[0007] To achieve the above purpose, the present invention provides the following technical solutions: A protection device for liver cancer ablation surgery includes an insertion rod, an open balloon is connected to the insertion rod, an isolation balloon is sleeved on one side of the insertion rod close to the open balloon, the isolation balloon and the open balloon are connected through a first hose, a second hose is connected to the open balloon, an internal thread sleeve is connected to the open balloon, and an external thread sleeve that is threadedly matched with the internal thread sleeve is rotatably connected to the isolation balloon. The interval between the isolation balloon and the open balloon is adjusted through the cooperation of the internal thread sleeve and the external thread sleeve. A positioning mechanism is provided on one side of the insertion rod close to the isolation balloon for positioning the insertion rod.

[0008] As a further optimized solution of the present invention, one end of the insertion rod close to the open balloon is conical.

[0009] As a further optimized solution of the present invention, the positioning mechanism includes a collar sleeved on one side of the insertion rod close to the isolation balloon. A fastening bolt for locking the insertion rod is provided on the collar, and a fixing belt for fixing it to the abdomen is connected to the outside of the collar.

[0010] As a further optimized solution of the present invention, a suction mechanism is provided at one end of the insertion rod away from the open balloon. The suction mechanism includes a micro water pump installed at one end of the insertion rod away from the open balloon. A chamber for storing liquid is opened on the insertion rod. The micro water pump is connected to the second hose through a first infusion tube, and the micro water pump is connected to the chamber through a second infusion tube.

[0011] As a further optimization solution of the present invention, a wrapping mechanism for wrapping the conical section of the insertion rod is provided on the insertion rod. The wrapping mechanism includes a blocking balloon sleeved on the conical section of the insertion rod. The shape of the blocking balloon is conical. The blocking balloon is communicated with the chamber through a connecting pipe. A suction assembly is arranged in the chamber for injecting the liquid in the chamber into the blocking balloon and for sucking the liquid in the blocking balloon back into the chamber.

[0012] As a further optimization solution of the present invention, the suction assembly includes a partition plate I connected to the chamber near the micro water pump side, a partition plate II is connected to one side of the chamber near the partition plate I, a partition plate III is connected to one side of the chamber near the blocking balloon, a connecting rod is arranged in the chamber and slidably penetrates through the partition plate I and the partition plate III. One end of the connecting rod is connected with a piston I located between the partition plate I and the partition plate II, the other end of the connecting rod is connected with a piston II, a conveying pipe I is connected to the insertion rod and located between the piston I and the partition plate II. The conveying pipe I is communicated with the chamber and the infusion pipe II. A conveying pipe II is connected to the insertion rod and located between the piston I and the partition plate I. The conveying pipe II is communicated with the chamber and the infusion pipe I.

[0013] As a further optimization solution of the present invention, the fixing belt includes a strap I and a strap II symmetrically connected to the outside of the collar. A jack is spaced on the strap II. A conical plug rod is connected to the side of the strap I away from the collar.

[0014] As a further optimization solution of the present invention, a sponge block is connected to the side of the collar near the isolation balloon, and the insertion rod penetrates through the sponge block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the cooperation of the internal thread sleeve and the external thread sleeve, the interval between the isolation balloon and the open-circuit balloon can be flexibly adjusted. By flexibly adjusting the interval between the isolation balloon and the open-circuit balloon according to the size of the tumor, it can not only avoid partial normal tissues from being exposed to the high-temperature environment, reduce the risk of unnecessary thermal damage, but also effectively isolate the healthy tissues around the tumor and improve the protection effect.

[0016] 2. Injecting liquid into the conical blocking balloon can cause the conical blocking balloon to stretch and deform to wrap the conical section of the insertion rod, so as to avoid the conical section of the insertion rod puncturing the intestinal tube and causing intestinal tube damage when the insertion rod is pushed and the operation is performed, thereby improving the protection effect.

[0017] 3. The insertion rod can be fixed in the collar through the fastening bolt, and the collar can be fixed on the abdomen through the fixing belt to realize the positioning of the insertion rod, so as to avoid the displacement of the insertion rod during the subsequent microwave ablation of the tumor mass, thereby improving the stability and safety, and further reducing the risk of wound surface enlargement, which is beneficial to postoperative recovery. Description of the Drawings

[0018] The accompanying drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 It is a schematic three-dimensional structure diagram of the present invention.

[0019] Figure 2 It is a partial schematic three-dimensional structure diagram of the present invention.

[0020] Figure 3 It is a connection schematic diagram of the isolation balloon, open-circuit balloon, inner threaded sleeve and outer threaded sleeve of the present invention.

[0021] Figure 4 It is a schematic three-dimensional structure diagram of the suction mechanism of the present invention.

[0022] Figure 5 It is a partial schematic three-dimensional structure of the wrapping mechanism of the present invention Figure 1 .

[0023] Figure 6 It is a partial schematic three-dimensional structure of the wrapping mechanism of the present invention Figure 2 .

[0024] Figure 7 It is a connection schematic diagram of the insertion rod, collar, fastening bolt and sponge block of the present invention.

[0025] Figure 8 It is a schematic three-dimensional structure diagram of the fixing belt of the present invention.

[0026] The reference numerals in the drawings are: 1 - insertion rod, 2 - isolation balloon, 3 - open-circuit balloon, 4 - hose one, 5 - hose two, 6 - inner threaded sleeve, 7 - outer threaded sleeve, 81 - collar, 82 - fastening bolt, 83 - fixing belt, 831 - strap one, 832 - strap two, 833 - jack, 834 - pin rod, 91 - micro water pump, 92 - infusion tube one, 93 - infusion tube two, 94 - chamber, 100 - delivery tube one, 101 - blocking balloon, 102 - connecting tube, 103 - partition one, 104 - connecting rod, 105 - piston one, 106 - piston two, 107 - partition two, 108 - partition three, 109 - delivery tube two, 11 - sponge block. Detailed Embodiments

[0027] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following detailed embodiments are only used to further illustrate the present application and cannot be understood as a limitation of the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. The serial numbers assigned to the components in this article, such as one, two, etc., are only used to distinguish the described objects and do not have any sequential or technical meaning. And as used in this application, terms such as connection and coupling, unless otherwise specified, all include direct and indirect connection (coupling).

[0029] Please refer to Figures 1 - 8 , a protection device for liver cancer ablation surgery, comprising an insertion rod 1. The front end of the insertion rod 1 is conical to facilitate the insertion of the insertion rod 1 into the abdomen. An open balloon 3 is connected to the front side of the insertion rod 1. The open balloon 3 is connected to the insertion rod 1 by means of heat melting. A separation balloon 2 is slidably sleeved on the insertion rod 1 behind the open balloon 3. The separation balloon 2 and the open balloon 3 are connected by a first hose 4. The first hose 4 is spirally wound around the insertion rod 1 to prevent the first hose 4 from becoming scattered when adjusting the interval between the separation balloon 2 and the open balloon 3. A second hose 5 is connected to the rear side of the open balloon 3. In a specific implementation, since the function of the open balloon 3 is to push aside the intestinal tract during the insertion process, and the function of the separation balloon 2 is to separate the tumor mass from the intestinal tract during the insertion process, facilitating subsequent microwave ablation to eliminate the tumor mass and avoiding damage to the intestinal tract, the diameter of the separation balloon 2 is greater than that of the open balloon 3. An internal thread sleeve 6 is connected to the rear side of the open balloon 3. An external thread sleeve 7 that is threadedly engaged with the internal thread sleeve 6 is rotatably connected to the front side of the separation balloon 2. The interval between the separation balloon 2 and the open balloon 3 is adjusted through the cooperation of the internal thread sleeve 6 and the external thread sleeve 7. A positioning mechanism is provided on the insertion rod 1 behind the separation balloon 2 for positioning the insertion rod 1. The positioning mechanism includes a collar 81 slidably sleeved on the insertion rod 1. The collar 81 is located behind the separation balloon 2. A fastening bolt 82 for locking the insertion rod 1 is provided on the collar 81. A fixing belt 83 for fixing it to the abdomen is connected to the outer wall of the collar 81. The fixing belt 83 includes a first strap 831 and a second strap 832 that are symmetrically connected to the outer wall of the collar 81 on the left and right. A jack 833 is spaced on the second strap 832. A conical insertion pin rod 834 is connected to the side of the first strap 831 away from the collar 81. A sponge block 11 is connected to the front side of the collar 81. The insertion rod 1 slidably penetrates through the sponge block 11. The sponge block 11 can separate the collar 81 from the abdomen, preventing the collar 81 from directly contacting the abdomen, thereby buffering and protecting the abdomen and improving comfort.

[0030] Please refer to Figure 1 and Figure 4, a suction mechanism is provided at the rear end of the insertion rod 1. The suction mechanism includes a micro water pump 91 installed at the rear end of the insertion rod 1. A chamber 94 for storing liquid is formed on the insertion rod 1. The micro water pump 91 is connected to the hose two 5 through the first infusion tube 92, and the micro water pump 91 is connected to the chamber 94 through the second infusion tube 93.

[0031] Please refer to Figures 4 - 6 , a wrapping mechanism for wrapping the conical section of the insertion rod 1 is provided on the insertion rod 1. The wrapping mechanism includes a blocking balloon 101 sleeved on the conical section of the insertion rod 1. The shape of the blocking balloon 101 is conical. The blocking balloon 101 is connected to the chamber 94 through a connecting pipe 102. Four connecting pipes 102 are arranged at intervals along the circumferential direction of the blocking balloon 101. The connecting pipe 102 is a rigid pipe to pull the blocking balloon 101 to prevent the blocking balloon 101 from displacing by itself. A suction assembly is provided in the chamber 94 for injecting the liquid in the chamber 94 into the blocking balloon 101 and for sucking the liquid in the blocking balloon 101 back into the chamber 94. The suction assembly includes a first partition 103 connected to the rear side in the chamber 94. A second partition 107 is connected to the rear side in the chamber 94 and is located in front of the first partition 103. A third partition 108 is connected to the front side in the chamber 94. A connecting rod 104 is slidably arranged through the first partition 103 and the third partition 108 in the chamber 94. The rear end of the connecting rod 104 is connected with a first piston 105 located between the first partition 103 and the second partition 107. The front end of the connecting rod 104 is connected with a second piston 106 located in front of the third partition 108. A first conveying pipe 100 is connected to the insertion rod 1 and is located between the first piston 105 and the second partition 107. The first conveying pipe 100 is communicated with the chamber 94 and the second infusion tube 93. A second conveying pipe 109 is connected to the insertion rod 1 and is located between the first piston 105 and the first partition 103. The second conveying pipe 109 is communicated with the chamber 94 and the first infusion tube 92.

[0032] Working principle: First, adjust the interval between the isolation balloon 2 and the open-circuit balloon 3 according to the size of the tumor. Rotating the external thread sleeve 7 can make it move forward, thereby driving the isolation balloon 2 to move forward close to the open-circuit balloon 3. Reversing the external thread sleeve 7 can make it move backward, thereby driving the isolation balloon 2 to move backward away from the open-circuit balloon 3, realizing flexible adjustment of the interval between the isolation balloon 2 and the open-circuit balloon 3. By flexibly adjusting the interval between the isolation balloon 2 and the open-circuit balloon 3 according to the size of the tumor, it can not only avoid partial normal tissues from being exposed to the high-temperature environment, reduce the risk of unnecessary thermal damage, but also effectively isolate the healthy tissues around the tumor and improve the protection effect.

[0033] Next, a thin needle is inserted through the skin and soft tissue into the abdominal cavity while injecting water into the abdominal cavity to displace the intestinal tract. Then, the thin needle is withdrawn. Subsequently, a thick needle is inserted into the area where water has been injected into the abdominal cavity, and then the thick needle is withdrawn. Then, the insertion rod 1 is inserted into the abdominal cavity. Initially, the chamber 94 area between the first partition 103 and the first piston 105 does not store liquid, the chamber 94 area between the first piston 105 and the second partition 107 stores liquid, the chamber 94 area between the second partition 107 and the third partition 108 stores liquid, and the chamber 94 area in front of the second piston 106 stores liquid. After the isolation balloon 2, the open-circuit balloon 3, and the blocking balloon 101 all enter the abdominal cavity, the micro water pump 91 is controlled to work. The liquid in the chamber 94 area between the second partition 107 and the third partition 108 is transported to the first infusion tube 92 through the second infusion tube 93, and the liquid in the chamber 94 area between the first piston 105 and the second partition 107 is pumped out through the first delivery tube 100. The liquid is injected into the isolation balloon 2 through the first infusion tube 92 via the second hose 5 to cause the isolation balloon 2 to expand, and the liquid is injected into the open-circuit balloon 3 through the first hose 4 to cause the open-circuit balloon 3 to expand. Moreover, the liquid is injected into the chamber 94 area between the first partition 103 and the first piston 105 through the second delivery tube 109. Under the pushing action of the liquid, the first piston 105 pushes the connecting rod 104 to move forward, thereby causing the second piston 106 to move forward. The liquid in the chamber 94 area in front of the second piston 106 is pushed into the blocking balloon 101 through the connecting tube 102, so that the conical blocking balloon 101 undergoes stretching deformation to wrap the conical section of the insertion rod 1, avoiding damage to the intestinal tract caused by the conical section of the insertion rod 1 when the insertion rod 1 is continuously pushed forward subsequently and during the operation, thus improving the protection effect.

[0034] Then, the insertion rod 1 is continuously pushed forward to move the isolation balloon 2 to the position of the tumor mass on the liver. During this process, the conical blocking balloon 101 and the open-circuit balloon 3 are used to open the path to push aside the intestinal tract near the path. The inflated isolation balloon 2 can separate the intestinal tract from the tumor mass, facilitating subsequent microwave ablation of the tumor mass. Subsequently, the collar 81 is put on the insertion rod 1. Then, the fixing belt 83 is fixed on the abdomen. The conical pin rod 834 on the first binding strap 831 is inserted into the jack 833 on the second binding strap 832, and the entire fixing belt 83 can be fixed on the abdomen, thereby fixing the collar 81 on the abdomen. Finally, the fastening bolt 82 is tightened to fix the insertion rod 1 in the collar 81, thereby locking the insertion rod 1 to achieve positioning of the insertion rod 1, avoiding displacement of the insertion rod 1 during subsequent microwave ablation of the tumor mass, thus improving stability and safety, further reducing the risk of increased wound surface, and being beneficial to postoperative recovery.

[0035] After the ablation of the tumor mass is completed, the micro water pump 91 is first operated to pump out the liquid in the isolation balloon 2 through the first infusion tube 92 and pump out the liquid in the open balloon 3 through the first hose 4. The isolation balloon 2 and the open balloon 3 then contract and return to their original state, and the liquid is transported back to the chamber 94 area between the second partition 107 and the third partition 108 through the second infusion tube 93. At the same time, the liquid in the chamber 94 area between the first partition 103 and the first piston 105 is pumped out through the second delivery tube 109, and the liquid is injected into the chamber 94 area between the first piston 105 and the second partition 107 through the first delivery tube 100. Under the pushing action of the liquid, the first piston 105 drives the connecting rod 104 to move backward, thereby causing the second piston 106 to move backward, and pumping the liquid in the blocking balloon 101 back to the chamber 94 area in front of the second piston 106 through the connecting tube 102. The conical blocking balloon 101 then contracts and returns to its original state. Then, the conical bolt rod 834 is pulled out from the jack 833 to release the fixation of the fixing belt 83, thereby releasing the locking of the collar 81. Then, the fastening bolt 82 is loosened to release the locking between the plug rod 1 and the collar 81. Subsequently, the collar 81 is removed from the plug rod 1, and finally, the plug rod 1 is pulled out from the abdominal cavity.

[0036] The above-described embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, improvements, and substitutions can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A protective device for liver cancer ablation surgery, comprising an insertion rod (1), an open-circuit balloon (3) connected to the insertion rod (1), and an isolation balloon (2) sleeved on a side of the insertion rod (1) close to the open-circuit balloon (3), characterized in that: The isolation balloon (2) and the open-circuit balloon (3) are connected via a hose 1 (4); the open-circuit balloon (3) is connected to a hose 2 (5); the open-circuit balloon (3) is connected to an internal threaded sleeve (6); the isolation balloon (2) is rotatably connected to an external threaded sleeve (7) threadably matched with the internal threaded sleeve (6); the interval between the isolation balloon (2) and the open-circuit balloon (3) is adjusted by matching the internal threaded sleeve (6) with the external threaded sleeve (7); and a positioning mechanism is provided on a side of the insertion rod (1) close to the isolation balloon (2) for positioning the insertion rod (1).

2. A protective device for liver cancer ablation surgery according to claim 1, characterized in that: One end of the insertion rod (1) close to the open-circuit balloon (3) is tapered.

3. A protective device for liver cancer ablation surgery according to claim 2, characterized in that: The positioning mechanism comprises a collar (81) sleeved on a side of the insertion rod (1) close to the isolation balloon (2), the collar (81) being provided with a fastening bolt (82) for locking the insertion rod (1), and the collar (81) being externally connected with a fixing belt (83) for fixing the collar (81) to the abdomen.

4. A protective device for liver cancer ablation surgery according to claim 3, characterized in that: An end of the insertion rod (1) away from the path balloon (3) is provided with a suction mechanism, the suction mechanism comprising a micro water pump (91) mounted on the end of the insertion rod (1) away from the path balloon (3), a chamber (94) for storing liquid is opened on the insertion rod (1), the micro water pump (91) is connected to the second hose (5) through the first infusion tube (92), and the micro water pump (91) is connected to the chamber (94) through the second infusion tube (93).

5. The protective device for liver cancer ablation surgery according to claim 4, characterized in that: The insertion rod (1) is provided with a wrapping mechanism for wrapping its tapered section, the wrapping mechanism comprising a blocking balloon (101) sleeved on the tapered section of the insertion rod (1), the blocking balloon (101) being tapered in shape, the blocking balloon (101) being connected to the chamber (94) via a connecting tube (102), a suction assembly being provided in the chamber (94) for injecting liquid in the chamber (94) into the blocking balloon (101), and for withdrawing liquid in the blocking balloon (101) back into the chamber (94).

6. The protective device for liver cancer ablation surgery according to claim 5, characterized in that: The suction assembly comprises a partition plate 1 (103) connected to a side of the chamber (94) close to the micro water pump (91); a partition plate 2 (107) connected to a side of the chamber (94) close to the partition plate 1 (103); a partition plate 3 (108) connected to a side of the chamber (94) close to the blocking balloon (101); a connecting rod (104) is provided in the chamber (94) and is slidably penetrated through the partition plate 1 (103) and the partition plate 3 (108); one end of the connecting rod (104) is connected to a connecting rod located between the partition plate 1 (103) and the partition plate 2 (107); ), the other end of the connecting rod (104) is connected to a piston 2 (106), the insertion rod (1) is connected to a delivery tube 1 (100) located between the piston 1 (105) and the partition 2 (107), the delivery tube 1 (100) is connected to the chamber (94) and the infusion tube 2 (93), the insertion rod (1) is connected to a delivery tube 2 (109) located between the piston 1 (105) and the partition 1 (103), the delivery tube 2 (109) is connected to the chamber (94) and the infusion tube 1 (92).

7. The protective device for liver cancer ablation surgery according to claim 6, characterized in that: The fixing belt (83) comprises a first strap (831) and a second strap (832) symmetrically connected to the outside of the collar (81); the second strap (832) has insertion holes (833) spaced apart therefrom; and a conical latch rod (834) is connected to the side of the first strap (831) away from the collar (81).

8. The protective device for liver cancer ablation surgery according to claim 7, characterized in that: A sponge block (11) is connected to one side of the collar (81) close to the isolation balloon (2), and the insertion rod (1) passes through the sponge block (11).

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