Electrotome for excising liver cancer in surgical department

Abstract

The invention provides an electrotome for liver cancer excision in the surgical department, and relates to the technical field of medical instruments, the electrotome comprises an electrotome penholder outer sleeve and a curved electrotome, the lower end of the electrotome penholder outer sleeve is provided with a curved electrotome center shaft, the curved electrotome is rotatably arranged on one side of the curved electrotome center shaft, and the two sides of the curved electrotome are both provided with insulating sleeves; the inner side of the curved electrotome is connected with a curved electrotome adjusting rope; the adjusting sliding button moves up and down to drive the adjusting transmission rope, so that the curved electrotome adjusting rope is driven to stretch out and draw back, the curved electrotome is pulled to make form change, the initial state of the curved electrotome is an original shape, a linear pre-cutting line can be made, and the linear pre-cutting line can be cut according to needs. The inner side point position of the curved electrotome can be pulled to retract into the insulating sleeve through stretching and retracting of the curved electrotome adjusting rope, so that the curved electrotome point position extending out of the insulating sleeve makes contact with an affected part, spaced dotted line type pre-cutting lines are made, different surgical requirements are met through different forms, and damage to the liver is smaller.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an electric scalpel for surgical resection of liver cancer. Background Art

[0002] During liver cancer resection surgery, a pre-incision line needs to be made on the liver: using an electric scalpel to cauterize the liver surface, thereby making a linear mark on the liver surface, and the liver cancer will be resected along the pre-incision line during the liver resection surgery;

[0003] The pre-incision line needs to be completed manually with an electric scalpel. During the process of making the pre-incision line, the force may not be well controlled, resulting in being too deep or too shallow. Being too deep will cause bleeding, and being too shallow will make it unclear. Moreover, there is no support for the hand when making the pre-incision line, and the drawn pre-incision line may be "crooked", making it difficult to achieve the smooth arc desired by the surgeon. Therefore, the present invention proposes an electric scalpel for surgical resection of liver cancer to solve the problems existing in the prior art. Summary of the Invention

[0004] In view of the above problems, the present invention proposes an electric scalpel for surgical resection of liver cancer, which can meet different surgical needs through different shapes and cause less damage to the liver.

[0005] To achieve the purpose of the present invention, the present invention is realized through the following technical solutions: An electric scalpel for surgical resection of liver cancer includes an outer sleeve of the electric scalpel pen and a curved electric scalpel. The lower end of the outer sleeve of the electric scalpel pen is provided with a central axis of the curved electric scalpel. The curved electric scalpel is rotatably arranged on one side of the central axis of the curved electric scalpel. Insulating sleeves are arranged on both sides of the curved electric scalpel;

[0006] An adjusting rope of the curved electric scalpel is connected to the inner side of the curved electric scalpel, and several groups of the adjusting ropes of the curved electric scalpel are arranged at equal angles around the center of the curved electric scalpel. The inner ends of the adjusting ropes of the curved electric scalpel pass through the central axis of the curved electric scalpel to connect an adjusting transmission rope, and the adjusting transmission rope is connected to an adjusting component.

[0007] Further improvement lies in that: the adjusting component includes an adjusting pulley and an adjusting sliding button. The adjusting pulley is rotatably arranged in the middle of the inner part of the outer sleeve of the electric scalpel pen. The adjusting sliding button is movably arranged in the middle of one side of the outer sleeve of the electric scalpel pen. The adjusting transmission rope extends into the inner part of the outer sleeve of the electric scalpel pen, and the upper end of the adjusting transmission rope bypasses the adjusting pulley and is connected to the adjusting sliding button.

[0008] Further improvement lies in that: the up and down movement of the adjusting sliding button drives the adjusting transmission rope, thereby driving the telescopic movement of the adjusting rope of the curved electric scalpel and pulling the curved electric scalpel to make a morphological change.

[0009] Further improvement lies in that: the initial state of the curved electric scalpel is a circular shape. There are four groups of the adjusting ropes of the curved electric scalpel, and the four groups of the adjusting ropes of the curved electric scalpel respectively adjust four points of the curved electric scalpel.

[0010] A further improvement lies in that: a connector is provided at the upper end of the outer sleeve of the electrocautery pen shaft, and a power cord is connected to the connector. One end of the power cord is connected with a power plug, and the power cord is connected to the curved electrocautery through a connection circuit.

[0011] A further improvement lies in that: a power adjustment component is provided above the inner part of the outer sleeve of the electrocautery pen shaft, and a first power button and a second power button are provided on one side of the power adjustment component. The first power button and the second power button extend out of the outer sleeve of the electrocautery pen shaft.

[0012] A further improvement lies in that: the power adjustment component is a fixed resistance element, and the fixed resistance element is connected to the connection circuit.

[0013] A further improvement lies in that: when the first power button is activated, the power adjustment component disconnects from the connection circuit, and the connection circuit turns on the high-power mode.

[0014] A further improvement lies in that: when the second power button is activated, the power adjustment component is connected to the connection circuit, and the connection circuit turns on the low-power mode.

[0015] A further improvement lies in that: the insulating sleeve is made of plastic, and the outer sleeve of the electrocautery pen shaft is an insulator.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. By adjusting the up and down movement of the sliding button, the present invention drives the adjustment transmission rope, thereby driving the telescopic movement of the curved electrocautery adjustment rope, pulling the curved electrocautery to make a morphological change. The initial state of the curved electrocautery is in a straight shape, and a straight pre-cut line can be made. According to needs, the inner point of the curved electrocautery can be retracted into the insulating sleeve by stretching the curved electrocautery adjustment rope, so that the point of the curved electrocautery extending out of the insulating sleeve contacts the affected part, and an intermittent dotted pre-cut line can be made. Different shapes are used to meet different surgical needs, causing less damage to the liver.

[0018] 2. By controlling the amplitude of the telescopic movement of the curved electrocautery adjustment rope to pull the inner point of the curved electrocautery, the present invention can change the point size of the curved electrocautery extending out of the insulating sleeve, thereby changing the depth and length of the burned dotted line. The electrocautery head with a curvature contacts the liver, which can effectively avoid accidentally damaging deep liver tissues and deep blood vessels too deeply.

[0019] 3. The curved electrocautery of the present invention rotates around the central axis of the curved electrocautery in a plane, and the insulating sleeve provides limit support during cauterization. The unique roller-type front-end design can provide a force support point for the operator, allowing uniform force application, so that the pre-cut line can reach the smooth curvature desired by the operator. Description of the Drawings

[0020] Figure 1Front view of the present invention;

[0021] Figure 2 Schematic diagram of the internal structure of the present invention;

[0022] Figure 3 Schematic diagrams of different pre-cut lines and corresponding curved electrosurgical knives of the present invention.

[0023] Wherein: 1. Outer sleeve of the electrosurgical pen; 2. Curved electrosurgical knife; 3. Central axis of the curved electrosurgical knife; 4. Insulating sleeve; 5. Adjusting rope of the curved electrosurgical knife; 6. Adjusting transmission rope; 7. Adjusting pulley; 8. Adjusting sliding button; 9. Connector; 10. Power cord; 11. Power plug; 12. Power adjustment component; 13. First power button; 14. Second power button. Specific embodiments

[0024] To deepen the understanding of the present invention, the following will further elaborate on the present invention in combination with embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation to the protection scope of the present invention.

[0025] Embodiment 1

[0026] According to Figure 1 , 2 , as shown in Figures 2, 3, this embodiment proposes an electrosurgical knife for surgical resection of liver cancer, including an outer sleeve 1 of the electrosurgical pen and a curved electrosurgical knife 2. A central axis 3 of the curved electrosurgical knife is provided at the lower end of the outer sleeve 1 of the electrosurgical pen. The curved electrosurgical knife 2 is rotatably arranged on one side of the central axis 3 of the curved electrosurgical knife. Insulating sleeves 4 are provided on both sides of the curved electrosurgical knife 2;

[0027] An adjusting rope of the curved electrosurgical knife 5 is connected to the inner side of the curved electrosurgical knife 2, and several groups of the adjusting ropes of the curved electrosurgical knife 5 are arranged at equal angles around the center of the curved electrosurgical knife 2. The inner end of the adjusting rope of the curved electrosurgical knife 5 passes through the central axis 3 of the curved electrosurgical knife to connect an adjusting transmission rope 6, and the adjusting transmission rope 6 is connected to an adjusting component. During use, the adjusting component drives the adjusting transmission rope 6, thereby driving the adjusting rope of the curved electrosurgical knife 5 to expand and contract, pulling the curved electrosurgical knife 2 to make a morphological change. The initial state of the curved electrosurgical knife 2 is a prototype, and a straight pre-cut line can be made. According to needs, the inner side points of the curved electrosurgical knife 2 can be retracted into the insulating sleeve 4 by expanding and contracting the adjusting rope of the curved electrosurgical knife 5, so that the points of the curved electrosurgical knife 2 extending out of the insulating sleeve 4 contact the affected part, making an intermittent dotted pre-cut line. Different morphologies meet different surgical requirements and cause less damage to the liver.

[0028] A radial traction network is formed by multiple groups of adjusting ropes (adjusting rope of the curved electrosurgical knife 5 + adjusting transmission rope 6) distributed at equal angles, and millimeter-level morphological control is achieved through the adjusting component

[0029] The curved electric knife 2 can be continuously deformed within the range of a curvature radius of 10 mm - 50 mm to meet the requirements from local ablation (φ ≤ 20 mm) to large - scale resection (φ ≥ 30 mm);

[0030] The segmented design of the insulating sleeve 4 enables the length of the exposed knife head to be precisely controlled within the range of 1 - 5 mm, reducing the risk of thermal damage to adjacent tissues.

[0031] The clinical trial data are as follows:

[0032]

[0033]

[0034] The adjusting component includes an adjusting pulley 7 and an adjusting sliding button 8. The adjusting pulley 7 is rotatably arranged at the middle end inside the outer sleeve 1 of the electric - knife pen - rod. In this embodiment, it is installed on the inner wall of the outer sleeve 1 of the electric - knife pen - rod through a bearing, and the diameter of its pulley groove is preferably 3 - 5 mm; the adjusting sliding button 8 is movably arranged at the middle end on one side of the outer sleeve 1 of the electric - knife pen - rod, and the sliding stroke limit is ±5 mm; the adjusting transmission rope 6 extends into the inner part of the outer sleeve 1 of the electric - knife pen - rod, and the upper end of the adjusting transmission rope 6 bypasses the adjusting pulley 7 and is connected to the adjusting sliding button 8. The adjusting transmission rope 6 is made of ultra - high - molecular - weight polyethylene fiber rope (diameter 0.2 mm, tensile strength > 200 N). One end of it is fixed to the sliding button 8, and the other end is connected to the curved - electric - knife adjusting rope 5; the up - and - down movement of the adjusting sliding button 8 drives the adjusting transmission rope 6, thereby driving the curved - electric - knife adjusting rope 5 to stretch and contract, pulling the curved electric knife 2 to make a morphological change. When in use, hold the outer sleeve 1 of the electric - knife pen - rod by hand, push the adjusting sliding button 8. The up - and - down movement of the adjusting sliding button 8 drives the adjusting transmission rope 6, thereby driving the curved - electric - knife adjusting rope 5 to stretch and contract, pulling the curved electric knife 2 to make a morphological change. The initial state of the curved electric knife 2 is a prototype, and a straight - line pre - tangent can be made. According to needs, the inner - side points of the curved electric knife 2 can be retracted into the insulating sleeve 4 by stretching and contracting the curved - electric - knife adjusting rope 5, so that the points of the curved electric knife 2 extending out of the insulating sleeve 4 contact the affected part, making an intermittent dotted - line pre - tangent. Different morphologies are used to meet different surgical requirements.

[0035] The initial state of the curved electric knife is a prototype. There are four groups of the curved - electric - knife adjusting ropes 5, and the four groups of the curved - electric - knife adjusting ropes 5 respectively adjust four points of the curved electric knife. The initial state of the curved electric knife 2 is a prototype, and a straight - line pre - tangent can be made. According to needs, the inner - side points of the curved electric knife 2 can be retracted into the insulating sleeve 4 from four points by stretching and contracting the four groups of the curved - electric - knife adjusting ropes 5, so that the points of the curved electric knife 2 extending out of the insulating sleeve 4 contact the affected part, making an intermittent dotted - line pre - tangent. The width of the dotted line is controlled by the retracting stroke.

[0036] When there is no external force acting on the curved electrocautery knife 2, it maintains a standard circular configuration by its own elastic memory. Preferably, the radius of curvature R = 10 - 20 mm. At this time, the four groups of curved electrocautery knife adjustment ropes 5 are in a state of tension balance;

[0037] The four groups of electrocautery knife adjustment ropes 5 are evenly distributed at an angle of 90° and are respectively fixed to 4 stress points on the inner side of the curved electrocautery knife 2, namely points A, B, C, and D. The distance from each stress point to the central axis 3 of the electrocautery knife is L. Preferably, L = 2 - 3 mm;

[0038] The insulating sleeve 4 is correspondingly provided with 4 independent accommodating cavities, and the depth of each cavity is h, h ≥ the cross-sectional height of the electrocautery knife, for accommodating the retracted knife head segment.

[0039] Linear cutting mode:

[0040] When the four groups of adjustment ropes 5 are relaxed synchronously, the curved electrocautery knife 2 returns to a complete circle, and its entire blade length contacts the tissue, forming a continuous electrocoagulation band. The width of the electrocoagulation band is 1.0 ± 0.2 mm;

[0041] Dotted line cutting mode:

[0042] Tighten the 4 groups of adjustment ropes 5, and the tip of the knife retracts into the insulating sleeve 4. If the retraction amount ΔL = 1.5 - 2.5 mm, the contact points between the electrocautery knife and the tissue are reduced by 50%, forming intermittent coagulation points. The interval distance d = 2L·sinθ, where θ is the deflection angle of the adjustment rope;

[0043] Mechanical parameter optimization:

[0044]

[0045] The upper end of the outer sleeve 1 of the electrocautery pen is provided with a connector 9, and a power cord 10 is connected to the connector 9. One end of the power cord 10 is connected with a power plug 11, and the power cord 10 is connected to the curved electrocautery knife 2 through a connection circuit for power supply.

[0046] Above the inner part of the outer sleeve 1 of the electrocautery pen, there is a power adjustment component 12. On one side of the power adjustment component 12, there are a first power button 13 and a second power button 14, and the first power button 13 and the second power button 14 extend out of the outer sleeve 1 of the electrocautery pen.

[0047] The power adjustment component 12 is a fixed resistance element, and the fixed resistance element is connected to the connection circuit. In this embodiment, a high-precision chip resistor is used, and the resistance value is preferably 10Ω ± 5%. It is soldered on the PCB board and connected in series with the main circuit.

[0048] When the first power button 13 is activated, pressing it directly shorts the fixed resistor, causing the circuit to enter the high-power mode and output 100 - 120W; the connection circuit turns on the high-power mode. When the second power button 14 is activated, the fixed resistor is connected to the circuit by default, the power adjustment component 12 is connected to the connection circuit, and the connection circuit turns on the low-power mode, outputting 60 - 80W. For liver cancer patients without cirrhosis, the high-power mode is turned on, and the curved electric knife 2 contacts the liver and burns the liver surface to leave a pre-incision line. For liver cancer patients with cirrhosis, the low-power mode is turned on. At this time, the power of the curved electric knife 2 is lower, and the damage to the liver is smaller.

[0049] The insulating sleeve 4 is made of plastic to ensure insulation and will not damage the liver. The outer sleeve of the electric knife handle 1 is an insulator. When held, it ensures safety.

[0050] The specific case experimental data are as follows:

[0051] Case 1: Resection of tumor in normal liver tissue

[0052] The operator presses the first power button (13) with the thumb, and the electric knife enters the high-power mode (120W);

[0053] The curved electric knife (2) cuts in a continuous circular pattern, the thickness of the instantaneous carbonized layer at the cut edge is 0.3mm, and the bleeding volume < 10ml / 10cm incision;

[0054] Case 2: Resection of Child-Pugh class B cirrhosis

[0055] Select the second power button (14) to activate the low-power mode (75W);

[0056] Dotted-line cutting (interval 2mm) is used, the single-point action time is shortened to 0.5 seconds, and the width of the thermal damage zone is measured to be only 0.9mm (2.4mm for conventional electric knives);

[0057] Pathological examination shows that the survival rate of hepatocytes within 5mm of the cut edge > 90%.

[0058] Example Two

[0059] According to Figure 1 、 2 、and 3, this example proposes an electric knife for surgical resection of liver cancer. During a surgical liver cancer resection operation, the operator needs to use an electric knife to burn a "pre-incision line" on the liver surface. Among them, the curved electric knife 2 and the insulating sleeve 4 are relatively fixed and can rotate in a plane around the central axis 3 of the curved electric knife.

[0060] The power adjustment component 12 is a fixed resistor element. When the first power button 13 is activated, the resistor element is not connected to the circuit, and it is in the high-power mode. When the second power button 14 is activated, the resistor element is connected to the circuit, and it is in the low-power mode.

[0061] The ends of the four curved electrocautery adjustment ropes 5 are connected to the curved electrocautery 2. The head ends are collinear with the curved electrocautery central axis 3 and the adjustment transmission rope 6, and then bypass the adjustment pulley 7 and are collinear with the adjustment sliding button 8. The up and down movement of the adjustment sliding button 8 can synchronously drive the adjustment transmission rope 6 and the curved electrocautery adjustment rope 5 to expand and contract, thereby pulling the curved electrocautery 2 to make a morphological change.

[0062] For liver cancer patients without cirrhosis, the operator inserts the power plug 11 into the socket and activates the high-power mode by pressing the first power button 13. The current conducts along the power cord 10. The operator holds the outer sleeve of the electrocautery pen 1, makes the curved electrocautery 2 contact the liver and cauterize the liver surface. Subsequently, the operator operates the pen to make the curved electrocautery 2 and the insulating sleeve 4 rotate around the curved electrocautery central axis 3. During the rotation, when the insulating sleeve 4 contacts the liver surface, it will not cauterize the liver, while when the curved electrocautery 2 contacts the liver surface, it will cauterize the liver to leave a pre-tangent line. By continuously rotating like this, a "smooth" dotted pre-tangent line ( Figure 3 Line B) can be completely left.

[0063] For liver cancer patients with cirrhosis, the operator inserts the power plug 11 into the socket and activates the low-power mode by pressing the second power button 14 in the same way as before. The rest of the steps are the same as above. At this time, the power of the electrocautery is lower, and the damage to the liver is smaller.

[0064] For some patients with irregular tumor morphology and edges, when making the pre-tangent line during the operation, the morphology of the curved electrocautery 2 can be adjusted to make a continuous pre-tangent line ( Figure 3 Line A). Before the operator activates the first power button 13 or the second power button 14, by holding the adjustment sliding button 8 and dragging it upward, the momentum of this part bypasses the adjustment pulley 7 and is transmitted along the adjustment transmission rope 6 to the curved electrocautery adjustment rope 5. The curved electrocautery adjustment rope 5 relaxes the traction force on the curved electrocautery 2, making the morphology of the curved electrocautery 2 closer to a complete circle. At this time, the pre-tangent line made is a complete line ( Figure 3 Line A).

[0065] For liver cancer patients with severe cirrhosis or brittle liver texture, when making the pre-tangent line during the operation, the morphology of the curved electrocautery 2 can be adjusted to minimize the damage to the liver. Figure 3Line C). Before the surgeon activates the first power button 13 or the second power button 14, by holding down the adjustment sliding button 8 and dragging it downwards, after this part of the momentum bypasses the adjustment pulley 7, it is transmitted along the adjustment transmission rope 6 to the curved electrocautery adjustment rope 5. The curved electrocautery adjustment rope 5 increases the traction force on the curved electrocautery 2, so that the part of the curved electrocautery 2 in contact with the liver is less. At this time, the pre-tangent line made is a dotted line with a wider interval ( Figure 3 Line C).

[0066] The electrocautery for surgical resection of liver cancer drives the adjustment transmission rope 6 through the up and down movement of the adjustment sliding button 8, thereby driving the curved electrocautery adjustment rope 5 to expand and contract, pulling the curved electrocautery 2 to make a morphological change. The initial state of the curved electrocautery 2 is a prototype, and a straight pre-tangent line can be made. According to needs, the inner point of the curved electrocautery 2 can be retracted into the insulating sleeve 4 by expanding and contracting the curved electrocautery adjustment rope 5. Thus, the part of the curved electrocautery 2 extending out of the insulating sleeve 4 contacts the affected part, making an intermittent dotted pre-tangent line. Different morphologies can meet different surgical requirements and cause less damage to the liver. At the same time, the present invention can change the point size of the curved electrocautery 2 extending out of the insulating sleeve 4 by controlling the amplitude of the expansion and contraction of the curved electrocautery adjustment rope 5 to pull the inner point of the curved electrocautery 2, thereby changing the depth and length of the burned dotted line. The electrocautery head with an arc contacts the liver, which can effectively avoid accidentally injuring the deep liver tissue and deep blood vessels too deeply. In addition, the curved electrocautery 2 of the present invention rotates in a plane around the curved electrocautery central axis 3, and the insulating sleeve 4 provides a limit support during cauterization. The unique roller-type front section design can provide a force support point for the operator, and the force can be applied evenly, so that the pre-tangent line can reach the smooth arc desired by the operator.

[0067] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An electrotome for surgical resection of liver cancer, comprising an electrotome penholder outer sleeve (1) and a curved electrotome (2), characterized in that: The lower end of the outer sleeve (1) of the electrocautery pen rod is provided with a curved electrocautery central axis (3). The curved electrocautery (2) is rotatably arranged on one side of the curved electrocautery central axis (3). Insulating sleeves (4) are arranged on both sides of the curved electrocautery (2). The inner side of the curved electrocautery (2) is connected with a curved electrocautery adjusting rope (5). A number of groups of the curved electrocautery adjusting ropes (5) are arranged at equal angles around the center of the curved electrocautery (2). The inner ends of the curved electrocautery adjusting ropes (5) pass through the curved electrocautery central axis (3) and are connected with an adjusting transmission rope (6), and the adjusting transmission rope (6) is connected with an adjusting component.

2. The electrocautery for surgical resection of liver cancer according to claim 1, wherein: The adjusting component includes an adjusting pulley (7) and an adjusting sliding button (8). The adjusting pulley (7) is rotatably arranged at the middle end inside the outer sleeve (1) of the electrocautery pen rod. The adjusting sliding button (8) is movably arranged at the middle end on one side of the outer sleeve (1) of the electrocautery pen rod. The adjusting transmission rope (6) extends into the inner part of the outer sleeve (1) of the electrocautery pen rod, and the upper end of the adjusting transmission rope (6) bypasses the adjusting pulley (7) and is connected with the adjusting sliding button (8).

3. The electrotome for surgical resection of liver cancer according to claim 2, wherein: The up and down movement of the adjusting sliding button (8) drives the adjusting transmission rope (6), thereby driving the curved electrocautery adjusting rope (5) to expand and contract, and pulling the curved electrocautery (2) to make a morphological change.

4. The electrotome for surgically removing liver cancer according to claim 3, wherein: The initial state of the curved electrocautery is a prototype. Four groups of the curved electrocautery adjusting ropes (5) are provided, and the four groups of the curved electrocautery adjusting ropes (5) respectively adjust four positions of the curved electrocautery.

5. The electrotome for surgical resection of liver cancer according to claim 1, wherein: The upper end of the outer sleeve (1) of the electrocautery pen rod is provided with a connector (9), and a power cord (10) is connected to the connector (9). One end of the power cord (10) is connected with a power plug (11), and the power cord (10) is connected to the curved electrocautery (2) through a connection circuit.

6. A surgical electrotome for liver cancer resection according to claim 5, characterized in that: A power adjustment component (12) is arranged above the inner part of the outer sleeve (1) of the electrocautery pen rod. A first power button (13) and a second power button (14) are arranged on one side of the power adjustment component (12). The first power button (13) and the second power button (14) extend out of the outer sleeve (1) of the electrocautery pen rod.

7. A surgical electrotome for liver cancer resection according to claim 6, characterized in that: The power adjustment component (12) is a fixed resistance element, and the fixed resistance element is connected to the connection circuit.

8. A surgical electrotome for excising liver cancer according to claim 7, characterized in that: When the first power button (13) is activated, the power adjustment component (12) disconnects from the connection circuit, and the connection circuit turns on the high-power mode.

9. A surgical electrotome for excising liver cancer according to claim 7, characterized in that: When the second power button (14) is activated, the power adjustment component (12) is connected to the connection circuit, and the connection circuit turns on the low-power mode.

10. A surgical electrotome for liver cancer resection according to any one of claims 1-9, characterized in that: The insulating sleeve (4) is made of plastic, and the outer sleeve (1) of the electrocautery pen rod is an insulator.

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