Ultrasonic knife head assembly and ultrasonic cutting hemostasis knife

Abstract

The utility model relates to an ultrasonic knife head assembly and an ultrasonic cutting hemostasis knife. The ultrasonic knife head assembly comprises a knife bar and a chuck, the chuck is provided with a rotating center, and the chuck can rotate around the rotating center relative to the knife bar; the chuck is provided with a first clamping face, the first clamping face comprises a first extending face and a second extending face, the first extending face is provided with a near end and a far end, the near end is close to the rotating center, the far end extends towards the second extending face and intersects with one end of the second extending face, an included angle is formed between the far end and the second extending face, and the other end of the second extending face extends towards the end head portion close to the cutter bar. Therefore, according to the ultrasonic knife head assembly and the ultrasonic cutting hemostasis knife, the situation that the biological tissue falls off can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an ultrasonic scalpel head assembly and an ultrasonic cutting hemostatic scalpel. Background Art

[0002] An ultrasonic scalpel is an energy surgical device, which usually includes a blade rod and a transducer connected to the blade rod. The transducer converts electrical energy into mechanical energy, causing the ultrasonic blade rod to vibrate at high frequency. The chuck cooperates with the blade rod head to clamp the tissue, thereby achieving tissue cutting and blood vessel coagulation. It has the characteristics of less bleeding, less damage to surrounding tissues, and faster postoperative recovery, and is therefore widely used in clinical practice.

[0003] However, in actual surgery, in order to avoid damaging nerves, when using an ultrasonic scalpel for cutting and coagulation, usually only the front third or quarter of the scalpel rod is used to clamp the tissue for cutting. In this case, since there is less tissue clamped, the tissue can easily slip under the action of shear force, thereby affecting the efficiency of the operation. Utility Model Content

[0004] Based on this, it is necessary to provide an ultrasonic scalpel head assembly and an ultrasonic cutting hemostatic scalpel that can improve the shedding of biological tissue.

[0005] In a first aspect, an embodiment of the present application provides an ultrasonic scalpel head assembly, comprising a shank and a chuck, wherein the chuck has a rotation center and is rotatable relative to the shank about the rotation center;

[0006] The chuck has a first clamping surface, which includes a first extension surface and a second extension surface. The first extension surface has a proximal end and a distal end. The proximal end is close to the rotation center, the distal end extends toward the second extension surface and intersects with one end of the second extension surface and has an angle, and the other end of the second extension surface extends toward the end portion close to the tool rod.

[0007] The ultrasonic scalpel head assembly provided in the embodiment of the present application, when clamping biological tissue, the biological tissue will be blocked by the second extension surface when sliding forward. The second extension surface prevents the biological tissue from falling off, thereby improving the situation of biological tissue falling off, improving surgical efficiency, and improving the safety and effectiveness of the surgery. The effect is particularly obvious when cutting or separating small sections of some very thin human fascia tissue.

[0008] In one embodiment, the second extension surface includes a first end close to the first extension surface and a second end away from the first extension surface;

[0009] The second extension surface is an inclined surface, and the first end and the second end are connected in a straight line; or the second extension surface is an arc surface, and the first end and the second end are connected in a curve, and the arc surface of the second extension surface is away from the shank.

[0010] In one embodiment, the tool rod has a second clamping surface opposite to the first clamping surface, the second clamping surface includes a third extension surface and a fourth extension surface, the third extension surface is located at an end of the tool rod away from the rotation center, one end of the third extension surface intersects with the distal end of the fourth extension surface, and the other end of the third extension surface extends in a direction away from the first clamping surface;

[0011] When the ultrasonic scalpel head assembly is in a clamping state, the second extension surface and the third extension surface are arranged opposite to each other along the first direction, and the first extension surface and the fourth extension surface are arranged opposite to each other along the first direction.

[0012] In one embodiment, the third extension surface includes a third end close to the fourth extension surface and a fourth end away from the fourth extension surface;

[0013] The third extension surface is an inclined surface, and the third end and the fourth end are connected in a straight line; or the third extension surface is an arc surface, and the third end and the fourth end are connected in a curve, and the arc surface of the third extension surface faces the first clamping surface.

[0014] In one embodiment, the first clamping surface further includes a fifth extension surface, the fifth extension surface is located on a side of the second extension surface away from the first extension surface, and the fifth extension surface and the first extension surface have the same extension direction.

[0015] In one embodiment, the area of the second extension surface is greater than the area of the third extension surface;

[0016] And / or, the first extension surface and the fourth extension surface are both planes.

[0017] In one embodiment, a plurality of sawtooth structures are provided on the first extension surface, the sawtooth structures including a first side wall and a second side wall intersecting each other, the first side wall and the second side wall being arranged opposite to each other along a direction from the second extension surface to the first extension surface;

[0018] An included angle is formed between the first side wall and the second side wall, and the included angles of the plurality of sawtooth structures increase sequentially from the second extension surface to the first extension surface.

[0019] In one embodiment, the chuck includes a chuck body and a gasket connected to each other. The gasket is located between the chuck body and the second clamping surface, and the surface of the gasket facing the second clamping surface is the first clamping surface.

[0020] In one embodiment, the ultrasonic knife head assembly also includes a tube body assembly, which includes an inner tube and an outer tube. The knife rod is inserted into the inner tube, and the outer tube is inserted into the inner tube, and the inner tube can move axially relative to the outer tube. The chuck is rotatably connected to the outer tube to form a rotation center. The chuck is connected to the inner tube and rotates around the rotation center with the axial movement of the inner tube.

[0021] In a second aspect, an embodiment of the present application provides an ultrasonic cutting hemostatic knife, comprising a handle and the ultrasonic knife head assembly described in the first aspect above, wherein the knife rod of the ultrasonic knife head assembly is connected to the handle.

[0022] The ultrasonic cutting hemostatic knife provided in the embodiment of the present application, when clamping biological tissue, the biological tissue will be blocked by the second extension surface when sliding forward. The second extension surface prevents the biological tissue from falling off, thereby improving the situation of biological tissue falling off, improving surgical efficiency, and improving the safety and effectiveness of the operation. The effect is particularly obvious when cutting or separating small sections of some very thin human fascia tissue. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the partial structure of the ultrasonic scalpel head assembly provided in an embodiment of the present application.

[0024] Figure 2 A side view of a chuck provided in accordance with an embodiment of the present application.

[0025] Figure 3 A bottom view of the chuck provided in an embodiment of the present application.

[0026] Figure 4 A top view of a chuck provided in an embodiment of the present application.

[0027] Description of reference numerals:

[0028] 100. Ultrasonic scalpel head assembly; 110. Chuck; 110a. Chuck body; 110b. Gasket; 111. First clamping surface; 1111. Second extension surface; 1112. First extension surface; 1115. Fifth extension surface; 112. First serration structure; 120. Blade rod; 122. Second clamping surface; 1223. Third extension surface; 1224. Fourth extension surface; 130. Tube assembly; 131. Inner tube; 132. Outer tube. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0032] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0035] In related technologies, the ultrasonic scalpel is a very important surgical instrument. It is widely used in clinical practice because of its high safety and ability to both cut and coagulate tissue. Its working principle is that the transducer connected to the ultrasonic scalpel converts electrical energy into mechanical energy, causing the ultrasonic scalpel's blade to vibrate at a high frequency, and under the action of clamping pressure, it cuts and coagulates biological tissue.

[0036] However, in actual surgery, in order to avoid damaging human nerves, the front third or quarter of the blade tip is usually used to clamp biological tissue when cutting with an ultrasonic scalpel. Since there is less tissue clamped, the tissue can easily slip under the action of shear force, affecting the efficiency of the operation. This is especially obvious when performing fine divisions on some fascia.

[0037] To solve the above problems, the embodiments of the present application provide an ultrasonic scalpel head assembly and an ultrasonic cutting hemostatic scalpel, which can improve the situation of biological tissue shedding, thereby improving surgical efficiency.

[0038] The following will be combined Figures 1-4 The ultrasonic cutting hemostatic knife provided in the embodiment of the present application is described.

[0039] The present invention provides an ultrasonic hemostatic scalpel, which includes a handle and an ultrasonic scalpel head assembly 100. The handle is configured to receive ultrasonic electrical signals and convert them into mechanical vibrations. The blade shaft 120 of the ultrasonic scalpel head assembly 100 is connected to the handle for transmitting mechanical vibrations.

[0040] Exemplarily, the handle includes a housing and an ultrasonic transducer. The transducer is connected to the housing and is used to convert ultrasonic electrical signals into mechanical vibrations, amplify the particle displacement or velocity of the mechanical vibrations through the transducer's horn, and concentrate the ultrasonic energy on a smaller area.

[0041] Exemplarily, the tail end of the ultrasonic scalpel head assembly 100 is inserted into the head end of the housing, and the tail end of the ultrasonic scalpel head assembly 100 is connected to the head end of the horn (for example, by threading). The tail end of the ultrasonic scalpel head assembly 100 can be the end of the ultrasonic scalpel head assembly 100 that faces away from the second clamping surface 122.

[0042] Exemplarily, the clamping process of the ultrasonic cutting hemostatic knife can be: by gripping the handle at the rear end, the inner tube 131 moves backward, driving the chuck 110 to rotate around the hinge point relative to the tube body assembly 130. After the chuck 110 rotates to a certain extent, it fits into the knife rod 120, and the human tissue or fascia is clamped between the chuck 110 and the knife rod 120.

[0043] The ultrasonic scalpel head assembly 100 provided in an embodiment of the present application is described below.

[0044] See also Figure 1 The present invention provides an ultrasonic scalpel head assembly 100, comprising a blade rod 120 and a chuck 110. The chuck 110 has a rotation center and is rotatable relative to the blade rod 120 about the rotation center. When the chuck 110 rotates toward the blade rod 120, the distance between the end of the chuck 110 away from the tube assembly 130 and the blade rod 120 decreases to less than a first preset value, thereby forming a clamping state of the ultrasonic scalpel head assembly 100. In this state, biological tissue can be clamped between the first clamping surface 111 and the second clamping surface 122. When the chuck 110 rotates away from the blade rod 120, the distance between the end of the chuck 110 away from the tube assembly 130 and the blade rod 120 increases to greater than a second preset value, thereby forming a non-clamping state of the ultrasonic scalpel head assembly 100. In this state, the ultrasonic scalpel head assembly 100 can release the biological tissue.

[0045] When the ultrasonic scalpel head assembly 100 is in the clamping state, the biological tissue can be located between the first clamping surface 111 and the second clamping surface 122 and clamped by the first clamping surface 111 and the second clamping surface 122. When the ultrasonic scalpel head assembly 100 is in the clamping state and the biological tissue is not located between the first clamping surface 111 and the second clamping surface 122, the first clamping surface 111 and the second clamping surface 122 of the clamping path can at least partially fit together. For example, the second extension surface 1111 and the third extension surface 1223 can at least partially fit together, and the first extension surface 1112 and the fourth extension surface 1224 can at least partially fit together.

[0046] In some embodiments, see Figure 1The blade rod 120 may include a first and second connected extension segments, the first and second extension segments being arranged along the extension direction of the blade rod 120. The ultrasonic scalpel head assembly 100 also includes a tubular assembly 130, which includes an inner tube 131 and an outer tube 132. The outer tube 132 is sleeved outside the inner tube 131. The second extension segment of the blade rod 120 is inserted into the inner tube 131. The first extension segment of the blade rod 120 is located outside the tubular assembly 130. The inner tube 131 is axially movable relative to the outer tube 132. The chuck 110 is rotationally connected to the outer tube 132 and forms a rotation center. The chuck 110 is connected to the inner tube 131 and rotates about the rotation center with the axial movement of the inner tube 131. In other words, when the inner tube 131 reciprocates within the outer tube 132 along the extension direction of the outer tube 132, the inner tube 131 can drive the chuck 110 to rotate relative to the outer tube 132.

[0047] For example, see Figure 1 and Figure 2 The chuck 110 has a first clamping surface 111, and the first extension section of the shank 120 has a second clamping surface 122. The second clamping surface 122 is located outside the tube assembly 130, and the first clamping surface 111 and the second clamping surface 122 are arranged opposite to each other.

[0048] In some embodiments, see Figure 1 and Figure 2 The first clamping surface 111 includes a second extension surface 1111 and a first extension surface 1112, which intersect and form an angle. The second extension surface 1111 is located on the side of the first extension surface 1112 that faces away from the tube assembly 130. The second extension surface 1111 is located at the end of the clamp 110 away from the rotation center. The first extension surface 1112 has a proximal end near the rotation center and a distal end away from the rotation center. One end of the second extension surface 1111 intersects with the distal end of the first extension surface 1112 and forms an angle. This angle is not equal to 180 degrees. That is, one end of the second extension surface 1111 intersects with the end of the first extension surface 1112 away from the rotation center. The other end of the second extension surface 1111 extends toward the end portion of the knife bar 120. The end portion of the knife bar here refers to the end of the knife bar that is close to the tissue. With such a configuration, when clamping biological tissue, the biological tissue will be blocked by the second extension surface 1111 when sliding forward. The second extension surface 1111 plays a role in preventing the biological tissue from falling off, thereby improving the situation of biological tissue falling off, improving surgical efficiency, and improving the safety and effectiveness of the operation. The effect is particularly obvious when cutting or separating small sections of some very thin human fascia tissue.

[0049] In some embodiments, see Figure 2The second extension surface 1111 is an inclined surface. The second extension surface 1111 includes a first end close to the first extension surface 1112 and a second end away from the first extension surface 1112. The first end and the second end are connected in a straight line, and the second end is inclined relative to the first end toward the direction close to the second clamping surface 122, so that the structure of the second extension surface 1111 is relatively simple, which is conducive to reducing the difficulty of preparing the second extension surface 1111.

[0050] Alternatively, the second extension surface 1111 is an arc surface, and the second extension surface 1111 includes a first end close to the first extension surface 1112 and a second end away from the first extension surface 1112. The first end and the second end are connected in a curve, and the arc surface of the second extension surface 1111 is bent in a direction away from the second clamping surface 122 (that is, the arc surface of the second extension surface 1111 is away from the knife rod 120), so that the area of the second extension surface 1111 is larger, which is beneficial to increase the contact area between the second extension surface 1111 and the biological tissue.

[0051] In this way, by setting the second extension surface 1111 as an inclined surface or an arc surface, a barb is formed at the end of the clamp 110 away from the tube body assembly 130, so that the clamp 110 has a barb slope structure at the tip. When clamping biological tissue, the biological tissue will be blocked by this barb slope structure when sliding forward, which plays a role in preventing the biological tissue from falling off, thereby improving the situation of biological tissue falling off, improving surgical efficiency, and improving the safety and effectiveness of the operation, especially when cutting or separating small sections of some very thin human fascia tissue.

[0052] In some embodiments, the second clamping surface 122 includes an intersecting third extension surface 1223 and a fourth extension surface 1224. The third extension surface 1223 is located on a side of the fourth extension surface 1224 that faces away from the tube assembly 130. The third extension surface 1223 is located at an end of the knife bar 120 that is away from the rotation center. One end of the third extension surface 1223 intersects with the distal end of the fourth extension surface 1224, and the other end of the third extension surface 1223 extends away from the first clamping surface 111. The distal end of the fourth extension surface 1224 may be the end of the fourth extension surface 1224 that is away from the rotation center.

[0053] Exemplarily, when the ultrasonic scalpel head assembly 100 is in a clamping state, the second extension surface 1111 and the third extension surface 1223 are disposed opposite each other (e.g., opposite each other along a first direction A), and can be used to clamp biological tissue. The first extension surface 1112 and the fourth extension surface 1224 are disposed opposite each other (e.g., opposite each other along a first direction A), and can be used to clamp biological tissue. The first direction A intersects with the extension direction of the shank 120 (i.e., direction B).

[0054] Exemplarily, when the ultrasonic scalpel head assembly 100 is in a clamping state, a first clamping path is formed between the second extension surface 1111 and the third extension surface 1223, and a second clamping path is formed between the first extension surface 1112 and the fourth extension surface 1224. The first clamping path and the second clamping path can be used to accommodate and clamp biological tissue, thereby making the structures of the first clamping path and the second clamping path relatively simple, which is conducive to reducing the difficulty of preparing the first clamping path and the second clamping path.

[0055] In some embodiments, the third extension surface 1223 is an inclined surface, and the third extension surface 1223 includes a third end close to the fourth extension surface 1224 and a fourth end away from the fourth extension surface 1224. The third end and the fourth end are connected in a straight line, and the fourth end is inclined relative to the third end in a direction away from the first clamping surface 111, thereby making the structure of the third extension surface 1223 relatively simple, which is conducive to reducing the difficulty of preparing the third extension surface 1223.

[0056] Alternatively, see Figure 1 The third extension surface 1223 is an arc surface. The third extension surface 1223 includes a third end close to the fourth extension surface 1224 and a fourth end away from the fourth extension surface 1224. The third end and the fourth end are connected in a curve. The arc surface of the third extension surface 1223 is bent in the direction close to the first clamping surface 111 (that is, the arc surface of the third extension surface 1223 faces the first clamping surface 111), so that the area of the third extension surface 1223 is larger, which is beneficial to increase the contact area between the third extension surface 1223 and the biological tissue.

[0057] In this way, by setting the third extension surface 1223 as an inclined surface or a curved surface, the extension directions of the second extension surface 1111 and the third extension surface 1223 are closer, so that when the ultrasonic knife head assembly 100 is in a clamping state, the distance between the second extension surface 1111 and the third extension surface 1223 is closer, so as to form a first clamping path that has a better clamping effect on biological tissue, thereby preventing the biological tissue from moving freely between the second extension surface 1111 and the third extension surface 1223, and improving the clamping stability of the first clamping path on the biological tissue.

[0058] In some embodiments, see Figure 2 First clamping surface 111 further includes a fifth extension surface 1115, which is located on a side of second extension surface 1111 facing away from first extension surface 1112. Fifth extension surface 1115 extends in the same direction as first extension surface 1112. Thus, by providing fifth extension surface 1115, the second end of second extension surface 1111 can be made less sharp by clamping head 110, thereby facilitating protection of biological tissue.

[0059] Exemplarily, both the first extension surface 1112 and the fourth extension surface 1224 may be planes, thereby reducing the difficulty of preparing the first extension surface 1112 and the fourth extension surface 1224. For example, when the ultrasonic scalpel head assembly 100 is in a clamped state, the fourth extension surface 1224 may be parallel to the extension direction of the shank 120, and the angle between the first extension surface 1112 and the fourth extension surface 1224 may be less than or equal to a third preset value. For example, the first extension surface 1112 and the fourth extension surface 1224 may be parallel to each other.

[0060] In some embodiments, the area of the second extension surface 1111 is larger than the area of the third extension surface 1223, so that the third extension surface 1223 can form more of the first clamping path, allowing the third extension surface 1223 to act more on biological tissue to improve the ultrasonic working efficiency of the knife rod 120.

[0061] In some embodiments, see Figure 2 and Figure 3 The first extension surface 1112 is provided with a plurality of sawtooth structures (i.e., first sawtooth structures 112). The provision of the first sawtooth structures 112 enhances the clamping stability of the second clamping path on biological tissue, thereby improving the clamping stability of the ultrasonic scalpel head assembly 100 on biological tissue and enhancing the effectiveness of preventing biological tissue from falling off. The first sawtooth structure 112 comprises a first sidewall and a second sidewall intersecting each other, which are arranged opposite each other along the direction from the second extension surface 1111 to the first extension surface 1112. An angle is defined between the first sidewall and the second sidewall, and this angle increases progressively along the direction from the second extension surface 1111 to the first extension surface 1112. This angle is larger for the first sawtooth structures 112 located near the tube assembly 130, facilitating tissue protection. Furthermore, the angle is smaller for the first sawtooth structures 112 located farther from the tube assembly 130, enhancing the clamping effectiveness of the first sawtooth structures 112 located in this portion of the tube assembly 130.

[0062] Exemplarily, the first side wall is arranged closer to the second extension surface 1111 relative to the second side wall, and the extension length of the first side wall is greater than the extension length of the second side wall. When the ultrasonic scalpel head assembly 100 is in a clamping state, the first serrated structure 112 can better reduce the movement of biological tissue from the first extension surface 1112 to the second extension surface 1111.

[0063] In some embodiments, a plurality of second serration structures are provided on the second extension surface 1111. By providing the second serration structure, the clamping stability of the first clamping path on the biological tissue can be increased, thereby improving the clamping stability of the ultrasonic scalpel head assembly 100 on the biological tissue and improving the effect of preventing the biological tissue from falling off.

[0064] Illustratively, the second serration structure includes a third sidewall and a fourth sidewall disposed in opposition to each other. The third sidewall is disposed closer to the first extension surface 1112 than the fourth sidewall, and the extension length of the third sidewall is greater than the extension length of the fourth sidewall. When the ultrasonic scalpel head assembly 100 is in a clamped state, the second serration structure can effectively reduce the movement of biological tissue from the second extension surface 1111 to the first extension surface 1112. In an embodiment where the extension length of the first sidewall is greater than the extension length of the second sidewall, the cooperation between the first serration structure 112 and the second serration structure prevents biological tissue from moving along the extension direction of the blade shaft 120. The position of the ultrasonic scalpel head assembly 100 relative to the biological tissue is relatively fixed, thereby improving the precision with which the ultrasonic scalpel head assembly 100 acts on the biological tissue and preventing the ultrasonic scalpel head assembly 100 from affecting other tissues that do not need to be clamped.

[0065] In some embodiments, see Figure 1 and Figure 4 The chuck 110 includes a connected chuck body 110a and a gasket 110b. The gasket 110b is located between the chuck body 110a and the second clamping surface 122. The surface of the gasket 110b facing the second clamping surface 122 is configured as the first clamping surface 111. In the embodiment of the present application, the gasket 110b has a barbed protrusion at the front end, that is, the gasket 110b at the second extension surface 1111 forms a barbed protrusion, which improves the anti-slip performance of the ultrasonic cutting hemostat when clamping small sections of biological tissue and fascia, thereby improving the efficiency of the surgery.

[0066] For example, the material of the gasket 110 b may include polytetrafluoroethylene (PTFE for short).

[0067] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An ultrasonic scalpel head assembly, comprising a shank and a chuck, wherein the chuck has a rotation center and is rotatable relative to the shank about the rotation center; characterized in that: The chuck has a first clamping surface, the first clamping surface includes a first extension surface and a second extension surface, the first extension surface has a proximal end and a distal end, the proximal end is close to the rotation center, the distal end extends toward the second extension surface and intersects with one end of the second extension surface and has an angle, and the other end of the second extension surface extends toward the end portion close to the tool rod.

2. The ultrasonic scalpel head assembly according to claim 1, characterized in that: The second extension surface includes a first end close to the first extension surface and a second end away from the first extension surface; The second extension surface is an inclined surface, and the first end and the second end are connected in a straight line; or, the second extension surface is an arc surface, and the first end and the second end are connected in a curve, and the arc surface of the second extension surface is away from the knife rod.

3. The ultrasonic scalpel head assembly according to claim 1, characterized in that: The knife bar has a second clamping surface opposite to the first clamping surface, the second clamping surface includes a third extension surface and a fourth extension surface, the fourth extension surface is close to the rotation center, the third extension surface is located at an end of the knife bar away from the rotation center, one end of the third extension surface intersects with the distal end of the fourth extension surface, and the other end of the third extension surface extends in a direction away from the first clamping surface; When the ultrasonic scalpel head assembly is in a clamped state, the second extension surface and the third extension surface are arranged opposite to each other along the first direction, and the first extension surface and the fourth extension surface are arranged opposite to each other along the first direction.

4. The ultrasonic scalpel head assembly according to claim 3, characterized in that: The third extension surface includes a third end close to the fourth extension surface and a fourth end away from the fourth extension surface; The third extension surface is an inclined surface, and the third end is connected to the fourth end in a straight line; or, the third extension surface is an arc surface, and the third end is connected to the fourth end in a curve, and the arc surface of the third extension surface faces the first clamping surface.

5. The ultrasonic scalpel head assembly according to any one of claims 1 to 4, characterized in that: The first clamping surface further includes a fifth extension surface, which is located on a side of the second extension surface facing away from the first extension surface. The fifth extension surface and the first extension surface have the same extension direction.

6. The ultrasonic scalpel head assembly according to claim 3 or 4, characterized in that: The area of the second extension surface is greater than the area of the third extension surface; And / or, the first extension surface and the fourth extension surface are both planes.

7. The ultrasonic scalpel head assembly according to any one of claims 1 to 4, characterized in that: A plurality of sawtooth structures are provided on the first extension surface, the sawtooth structures including a first side wall and a second side wall intersecting each other, the first side wall and the second side wall being arranged opposite to each other along a direction from the second extension surface to the first extension surface; An included angle is formed between the first side wall and the second side wall, and the included angle of the plurality of sawtooth structures increases sequentially from the second extension surface to the first extension surface.

8. The ultrasonic scalpel head assembly according to any one of claims 1 to 4, characterized in that: The chuck includes a chuck body and a gasket connected to each other. The gasket is located between the chuck body and the tool rod. The surface of the gasket facing the tool rod is the first clamping surface.

9. The ultrasonic scalpel head assembly according to any one of claims 1 to 4, characterized in that: The ultrasonic scalpel head assembly also includes a tube body assembly, which includes an inner tube and an outer tube. The shank is sleeved inside the inner tube, and the outer tube is sleeved outside the inner tube and the inner tube can move axially relative to the outer tube. The chuck is rotatably connected to the outer tube to form the rotation center. The chuck is connected to the inner tube and rotates around the rotation center with the axial movement of the inner tube.

10. An ultrasonic cutting hemostatic knife, characterized in that: It comprises a handle and an ultrasonic scalpel head assembly according to any one of claims 1 to 9, wherein the blade rod of the ultrasonic scalpel head assembly is connected to the handle.

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