An ultrasonic osteotome and ultrasonic osteotome system

Abstract

The application relates to an ultrasonic bone knife and an ultrasonic bone knife system, the ultrasonic bone knife comprising a knife rod and a knife head, the knife rod being used for detachable connection with a transducer and transmission of ultrasonic vibration generated by the transducer to the knife head; the knife head is in a spoon shape, the distal end of the knife head is a circular arc surface, and a plurality of tooth grooves are arranged in the circular arc surface, so that the circular arc surface forms a plurality of cutting teeth. By designing the knife head of the ultrasonic bone knife into a spoon shape, the spoon-shaped knife head can be suitable for the needs of various surgical scenes, the distal end of the knife head is designed into a circular arc surface, and a plurality of tooth grooves are arranged in the circular arc surface to form a plurality of cutting teeth, the blunt surface of the distal end of the spoon-shaped knife head has a good protective effect on soft tissues and is not easy to cause damage, can better adhere to the surface of bone tissues, and is convenient for multi-angle operation in surgery, and the cutting teeth formed in the blunt surface can also significantly improve the cutting and grinding performance when cutting bones.

Description

Technical Field

[0001] This application relates to the field of surgical instruments, and in particular to an ultrasonic bone scalpel and ultrasonic bone scalpel system. Background Technology

[0002] An ultrasonic bone scalpel is a medical device that uses ultrasonic vibration to cut and grind bone tissue. It is widely used in surgical procedures in neurosurgery, spinal surgery, and plastic surgery. The ultrasonic bone scalpel converts electrical energy into mechanical vibration through a transducer, and transmits this vibration to the blade head via the scalpel shaft, achieving precise cutting and grinding of bone tissue. It offers advantages such as less bleeding, less trauma, and high safety. However, existing ultrasonic bone scalpels still have some technical problems: First, traditional ultrasonic bone scalpels often have flat or simple curved blade designs, lacking adaptability to complex bone structures and failing to meet the precision requirements of different surgical sites. Second, some blade heads have low amplitude and low cutting efficiency, making them ineffective at cutting and grinding harder bone tissue and unable to meet the needs of rapid surgery. Therefore, there is an urgent need for a structurally optimized ultrasonic bone scalpel to solve these technical problems. Summary of the Invention

[0003] This invention proposes an ultrasonic bone scalpel and ultrasonic bone scalpel system to solve the shortcomings of traditional ultrasonic bone scalpels in terms of scalpel head design, amplitude efficiency, connection stability, and operating field of vision, thereby achieving the goal of improving surgical efficiency and enhancing cutting ability.

[0004] In the first aspect, this utility model proposes an ultrasonic bone scalpel, which includes a shank and a head. The shank is used to detachably connect to a transducer and to transmit the ultrasonic vibration generated by the transducer to the head. The head is spoon-shaped, and the distal surface of the head is an arc surface, and multiple tooth grooves are provided in the arc surface, so that the arc surface forms multiple cutting teeth.

[0005] In another embodiment, the tooth groove is tapered along the extension direction.

[0006] In another embodiment, the included angle between the tapered directions of two adjacent tooth grooves is greater than 90 degrees.

[0007] In another embodiment, the inner concave surface of the cutter head is provided with a grinding enhancement portion, which is a discrete protrusion structure or a crisscrossing concave structure.

[0008] In another embodiment, at least two wrench clamping portions 120 are provided circumferentially at intervals on the proximal sidewall of the tool holder, and the two wrench clamping portions are arranged opposite to each other; wherein, the wrench clamping portions are located at at least two positions along the axial direction of the tool holder at different distances from the axis of the tool holder.

[0009] In another embodiment, the tool holder includes a first segment, a second segment, a third segment, a fourth segment, and a fifth segment connected in sequence, with a wrench clamping part disposed at the proximal end of the first segment and a cutting head connected at the distal end of the fifth segment; the diameters of the first segment and the third segment are both larger than the diameters of the second segment, the fourth segment, and the fifth segment.

[0010] In another embodiment, the first segment and the third segment have the same diameter.

[0011] In another embodiment, the minimum diameter of the second segment is the same as the minimum diameter of the fourth segment.

[0012] In another embodiment, the minimum diameter of the fifth segment is smaller than the minimum diameter of the second segment.

[0013] Secondly, this utility model proposes an ultrasonic bone scalpel system, which includes an ultrasonic host, a transducer, and an ultrasonic bone scalpel as described above. The ultrasonic host is electrically connected to the transducer and is used to provide electrical energy to the transducer. The transducer is used to convert electrical energy into mechanical vibration, and the ultrasonic bone scalpel is connected to the transducer.

[0014] The above-mentioned solution designs the ultrasonic bone scalpel's tip in a spoon shape, which is suitable for various surgical scenarios. The distal end of the tip is designed with an arc surface and multiple grooves are set in the arc surface to form multiple cutting teeth. The blunt surface of the distal end of the spoon-shaped tip has a good protective effect on soft tissue, making it less likely to cause damage. It can also better conform to the bone tissue surface, facilitating multi-angle operation during surgery. At the same time, the cutting teeth formed in the blunt surface can also significantly improve the cutting and grinding performance when cutting bone. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the ultrasonic bone scalpel according to an embodiment of this application;

[0017] Figure 2 yes Figure 1 The image shows a front view of an ultrasonic bone scalpel.

[0018] Figure 3 yes Figure 1 The diagram shows the head structure of the ultrasonic bone scalpel.

[0019] Icon labels:

[0020] 100-tool holder, 110-threaded hole, 120-wrench clamping part, 130-first section, 140-second section, 150-third section, 160-fourth section, 170-fifth section;

[0021] 200 - Cutting head, 210 - Tooth groove, 220 - Grinding section;

[0022] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0026] In this specification, references to "one embodiment," "some embodiments," or simply "embodiment" mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. Furthermore, in one or more embodiments, specific features, structures, or characteristics may be combined in any suitable manner.

[0027] To illustrate the technical solution of this application, the following description is provided in conjunction with specific accompanying drawings and embodiments.

[0028] In the first aspect, this utility model proposes an ultrasonic bone scalpel, which includes a stalk 100 and a head 200. The stalk 100 is used to detachably connect to a transducer and to transmit the ultrasonic vibration generated by the transducer to the head 200. The head 200 is spoon-shaped, and the distal end of the head 200 is an arc surface, and multiple tooth grooves 210 are provided in the arc surface, so that the arc surface forms multiple cutting teeth.

[0029] The ultrasonic bone scalpel includes a shank 100 and a head 200. The shank 100 is composed of multiple cylindrical sections of different diameters and lengths connected sequentially. It is used to transmit the vibration of the transducer to the head 200 and to increase the amplitude of the vibration waveform output by the transducer during the transmission process, so that the head 200 has sufficient amplitude. The head 200 is designed in a spoon shape. This shape can better conform to the surface of bone tissue and facilitate multi-angle operation during surgery. To maintain a certain rigidity, the diameter of the cylindrical section connecting the spoon-shaped head is set to 2-3 mm, preferably 2.6 mm. The spoon-shaped structure is similar to an ear pick. The inner side of the spoon-shaped structure is concave, and the outer side is convex. At the distal end of the spoon-shaped head, a distal surface is formed between the concave and convex surfaces. The concave surface of the spoon-shaped head forms a "cavity" structure, which can accommodate bone fragments generated during the cutting process, facilitating the removal of the bone fragments.

[0030] The distal surface of the cutter head 200 is designed as an arc surface. This arc surface is beneficial for the distal end of the cutter head 200 to penetrate bone tissue and reduce damage to soft tissue when it encounters soft tissue. However, in order to achieve a better cutting effect on bone tissue when cutting bone fragments, multiple grooves 210 are spaced apart on the arc surface to form multiple cutting teeth. The presence of cutting teeth increases the energy of the distal end of the spoon-shaped cutter head 200 to break bone tissue, and the presence of grooves 210 also facilitates the removal of bone fragments. The spaced grooves 210 on the arc surface ensure that the distal tooth surface of the cutting teeth is still an arc surface, which greatly ensures the protection of soft tissue at the distal end of the spoon-shaped cutter head 200, while the formed cutting teeth greatly improve the cutting efficiency. In some specific embodiments, the cross-sectional shape of the groove 210 can be V-shaped, U-shaped, etc., preferably V-shaped, because V-shaped grooves can more effectively break up and remove bone tissue under ultrasonic vibration, improving cutting efficiency. The groove width is 0.25-0.5 mm, the groove depth is 0.5-1.5 mm, and the groove spacing is 0.3-0.6 mm, ensuring that the grooves are arranged compactly and reasonably. The presence of the groove 210 can also increase the friction between the cutter head 200 and the bone tissue, preventing slippage and making the operation more stable. These small grooves and teeth can grasp the bone fragments generated during the cutting process. At the same time, if the teeth are small, they can further break up larger bone fragments, making it easier for the suction device to remove them. The width and depth of the groove 210 are designed according to the overall size of the cutter head 200 and the actual application requirements. Wherein, the groove width is the size of the opening in the cross-section of the tooth groove 210 along the extension direction, the groove depth is the distance between the opening in the cross-section of the tooth groove 210 along the extension direction and the lowest point of the groove bottom, the groove spacing is the distance between two adjacent tooth grooves 210, and the extension direction of the tooth groove is the vertical direction of the tooth groove cross-section.

[0031] In another embodiment, the tooth groove 210 is tapered along the extending direction.

[0032] Among them, such as Figure 3 As shown, the groove 210 gradually decreases in width and / or depth along the extension direction, so that the groove 210 forms a conical structure, that is, a groove shape with one end larger than the other end. This allows the coolant flowing to the cutter head 200 to be better directed to the part in contact with the tissue, and increases the liquid residence time, resulting in better heat dissipation and thus better reduction of thermal damage.

[0033] In another embodiment, the included angle between the tapered directions of two adjacent tooth grooves 210 is greater than 90 degrees.

[0034] Among them, such as Figure 3As shown, the conical orientation of the multiple tooth grooves 210 is basically the same, i.e., in the same direction. However, in some embodiments, the conical orientation of the multiple tooth grooves 210 may be that two adjacent tooth grooves 210 have opposite orientations or an included angle greater than 90 degrees and less than 180 degrees. This arrangement allows the tooth shape formed at the distal end of the cutter head 200 to better break up bone tissue. The conical direction of the tooth groove is from the larger end to the smaller end along the extension direction of the tooth groove.

[0035] In another embodiment, the inner concave surface of the blade 200 is provided with a grinding enhancement portion 220, which is a raised structure or a recessed structure.

[0036] Among them, such as Figure 3 As shown, the spoon-shaped concave surface of the cutter head 200 is provided with a grinding enhancement part 220, which is used to increase grinding performance. The grinding enhancement part 220 is a raised structure, such as a raised bevel tooth, and the raised structure is arranged at intervals. Alternatively, the grinding enhancement part 220 is a recessed structure. This mechanism is a cutting groove. Through cutting, multiple cutting grooves are formed crisscrossed on the surface of the spoon-shaped concave surface.

[0037] In another embodiment, at least two wrench clamping portions 120 are provided circumferentially at intervals on the proximal sidewall of the tool bar 100, and the two wrench clamping portions 120 are arranged opposite to each other; wherein, the wrench clamping portions 120 are at least two positions along the axial direction of the tool bar 100 at different distances from the axis of the tool bar 100.

[0038] Among them, such as Figure 1 As shown, the proximal end face of the tool holder 100 has a threaded hole 110, which is used for threaded connection with the transducer. Because high-frequency vibration needs to be transmitted between the tool holder 100 and the transducer, the threaded connection between the guide rod and the transducer needs to reach a certain tightening force to ensure the stability of the connection during operation. In order to better apply the rated preload when connecting the tool holder 100 and the transducer, a torque wrench is used to apply the preload, thus, as... Figure 1 or Figure 2As shown, a wrench clamping part 120 is provided on the proximal side wall of the tool holder 100. The wrench clamping part 120 is a planar structure cut out on the proximal side of the tool holder 100. There are at least two wrench clamping parts 120, and there can be an even number such as 2, 4, or 6. The multiple wrench clamping parts 120 are distributed at equal intervals around the axis of the tool holder 100 at 360 degrees. The wrench clamping parts 120 opposite each other are parallel or at an angle to each other. For example, when there are two wrench clamping parts 120, the two wrench clamping parts 120 are arranged opposite each other circumferentially around the tool holder 100, that is, the two wrench clamping parts are arranged opposite each other. Part 120 is symmetrically arranged about the axis of the tool holder 100, and the two wrench clamping parts 120 are parallel to each other, that is, the trigger clamping part is parallel to the axis of the tool holder 100, or they are arranged at an angle, that is, the trigger clamping part intersects the axis of the tool holder 100. The angled wrench clamping part 120 restricts the engagement direction between the wrench and the wrench clamping part 120, i.e., it has a foolproof function, ensuring that the wrench clamps the tool holder 100 in the same direction each time, thereby ensuring that the direction of the applied preload is always the same, providing better usability and avoiding different operating methods from different users. When the two opposing wrench clamping parts 120 are arranged parallel to each other, to increase the foolproof function, such as... Figure 1 and Figure 2 As shown, the wrench clamping part 120 includes a first clamping plane and a second clamping plane. The two clamping planes are parallel to each other and do not overlap to form a stepped structure. For example, the distance from the plane near the proximal end to the axis of the tool holder 100 is greater than the distance from the plane near the distal end to the axis of the tool holder 100. Therefore, when the wrench clamping part 120 has a foolproof function, that is, the distance from the wrench clamping part to the axis of the tool holder 100 is different at at least two positions along the axis of the tool holder 100.

[0039] In another embodiment, the blade shank 100 includes a first segment 130, a second segment 140, a third segment 150, a fourth segment 160, and a fifth segment 170 connected in sequence. A wrench clamping part 120 is disposed at the proximal end of the first segment 130, and a blade head 200 is connected to the distal end of the fifth segment 170. The diameters of the first segment 130 and the third segment 150 are both larger than the diameters of the second segment 140, the fourth segment 160, and the fifth segment 170.

[0040] The diameter of the part connecting the bone scalpel to the transducer cannot exceed the diameter of the transducer's output end, and is generally the same as the diameter of the transducer's output end. Currently, during surgery, due to the high frequency of coordination, the bone scalpel length is often set to be short. However, if the bone scalpel is too short, it will be difficult for the surgeon to accurately control the cutting depth and direction during surgery. Therefore, a longer bone scalpel needs to be designed to meet the needs of surgery. However, when the bone scalpel length is set to be long, it will reduce the stability of the operation. The extended scalpel head 200 is also difficult to turn flexibly when entering a narrow space. At the same time, since the ultrasonic bone scalpel relies on high-frequency vibration, usually 20-40KHz, an excessively long bone scalpel will also lead to vibration attenuation and resonance instability.

[0041] In one embodiment of this application, for surgical scenarios such as spinal surgery where there are many deep operations and the distance needs to be extended, an extended bone knife with a length in the range of 80-150mm is designed.

[0042] Taking a host operating frequency of 25-26kHz as an example, the structural design of the extended bone scalpel is explained. The bone scalpel is made of titanium alloy, and the longitudinal wave velocity of titanium alloy is 6100m / s. At a frequency of 25.5kHz, the wavelength is 239mm. Because the bone scalpel design needs to meet resonance conditions, the length of the scalpel head is generally an integer multiple of half the wavelength, i.e., about 120mm. In order to meet the needs of surgery, as well as comfort, operability, and without too much performance degradation, in this embodiment, an additional 30mm is added to the 120mm, making the overall length of the bone scalpel 150mm. According to theoretical calculations, in the resonant state, simply increasing the length by 30mm will cause the system frequency to drop, and the ultrasound system will no longer be in a resonant state, generating secondary resonance. Therefore, the bone scalpel design needs to add a stepped structure, and the end amplitude is enhanced through a multi-stage variable diameter structure to achieve resonance matching and a more comfortable operation for the doctor.

[0043] With an overall length of 150mm for the bone cutter, the blade 200 also adopts the spoon-shaped structure described in the above embodiment; such as Figure 2As shown, the tool holder 100 is designed to consist of a first segment 130, a second segment 140, a third segment 150, a fourth segment 160, and a fifth segment 170 connected sequentially; wherein the diameters of the first segment 130 and the third segment 150 are both larger than the diameters of the second segment 140, the fourth segment 160, and the fifth segment 170. In some other embodiments, the first segment 130 and the third segment 150 have the same diameter; furthermore, the minimum diameter of the second segment 140 and the minimum diameter of the fourth segment 160 are the same; and even further, the minimum diameter of the fifth segment 170 is smaller than the minimum diameter of the second segment 140. Thus, the blade 100 forms multiple stepped structures. These stepped structures are used to increase the amplitude and reduce the loss of ultrasonic energy during transmission. For example, when the diameter of the blade 100 decreases from 8mm in the first segment 130 to 6mm in the second segment 140 and then increases to 8mm in the third segment 150, theoretically the amplitude at the 6mm to 8mm position will recover to the amplitude value at the input of the first segment 130. However, since the high-frequency vibration system is a non-traveling wave process, the wave will be partially reflected at the interface during the 6mm to 8mm process. This partially reflected wave will interfere with the incident wave, thereby changing the position of the nodes (minimum amplitude point) and antinodes (maximum amplitude point) of the standing wave in the vibration system, and thus changing the standing wave distribution pattern of the entire system. Therefore, the vibration performance of the bone cutter that is 30mm longer than half the wavelength can be achieved through this stepped structure, so that the amplitude and other performance of the extended bone cutter at the blade tip 200 position meet the design requirements.

[0044] In one specific embodiment, such as Figure 2 As shown, from the input end to the output end, the first segment 130 has a diameter of 8mm and a length of 25mm, and its proximal end is threaded to the transducer; the second segment 140 has a diameter that decreases to 4.5mm and a length of 30mm; the third segment 150 has a diameter that returns to 8mm and a length of 17mm; the fourth segment 160 has a diameter that decreases again to 4.5mm and a length of 30.5mm; the fifth segment 170 has a diameter that decreases to 2.6mm and a length of 39mm; and the cutter head 200 has a length of 8.5mm. There are rounded transitions between each segment.

[0045] In use, the shank 100 of the ultrasonic bone scalpel is connected to an ultrasonic transducer. The ultrasonic vibrations generated by the transducer are transmitted to the blade head 200 through the shank 100. The operator holds the transducer and places the arc-shaped surface of the blade head 200 into contact with the bone tissue. Under the action of ultrasonic vibration, the cutting teeth on the arc-shaped surface cut and grind the bone tissue. Simultaneously, the grinding-enhancing part 220 on the concave surface of the blade head 200 further grinds the bone tissue, cutting it into fine particles. This design enables the ultrasonic bone scalpel to efficiently and precisely cut and grind bone tissue in orthopedic surgery, reducing surgical trauma and shortening operation time.

[0046] Secondly, this utility model proposes an ultrasonic bone scalpel system, which includes an ultrasonic host, a transducer, and an ultrasonic bone scalpel as described above. The ultrasonic host is electrically connected to the transducer and is used to provide electrical energy to the transducer. The transducer is used to convert electrical energy into mechanical vibration, and the ultrasonic bone scalpel is connected to the transducer.

[0047] The ultrasound unit is the energy source for the entire system. It is electrically connected to the transducer via cables, providing the transducer with electrical energy at a specific frequency and power. The ultrasound unit has an internal control circuit that can adjust the output power and frequency to meet different surgical needs. The ultrasound unit is also equipped with a display screen and control panel, allowing the operator to set and adjust system operating parameters. The display screen shows real-time information such as system operating status, power level, and operating time.

[0048] The transducer is the core component of the system. It contains a piezoelectric ceramic plate that vibrates at high frequency when receiving electrical energy from the ultrasound host, converting the electrical energy into mechanical vibration energy. One end of the transducer is electrically connected to the ultrasound host, while the other end has a connection interface for detachable connection to the ultrasonic bone scalpel's handle 100. The transducer housing is ergonomically designed for easy handling by doctors during extended periods, reducing surgical fatigue.

[0049] In use, the operator first connects the ultrasonic bone scalpel's handle 100 to the transducer, then starts the ultrasonic unit and sets the appropriate power and frequency. The electrical energy generated by the ultrasonic unit is transmitted to the transducer, which converts the electrical energy into mechanical vibration. This mechanical vibration is transmitted to the blade head 200 through the handle 100. The operator holds the transducer and brings the ultrasonic bone scalpel's blade head 200 into contact with the bone tissue to be cut or ground. Under the action of ultrasonic vibration, the cutting teeth and grinding section 220 of the blade head 200 efficiently cut and grind the bone tissue.

[0050] This ultrasonic bone scalpel system achieves precise cutting and grinding of bone tissue through the coordinated work of the ultrasonic main unit, transducer, and ultrasonic bone scalpel. It has the advantages of high cutting accuracy, low thermal damage, less bleeding, and short operation time, and is suitable for various orthopedic surgical procedures.

[0051] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify or combine the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features. Such modifications, combinations or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. An ultrasonic bone scalpel, characterized in that, The ultrasonic bone scalpel includes a shank (100) and a blade head (200). The shank (100) is used for detachable connection with a transducer and for transmitting ultrasonic vibrations generated by the transducer to the blade head (200). The blade head (200) is spoon-shaped, and the distal surface of the blade head (200) is an arc surface, and multiple tooth grooves (210) are provided in the arc surface, so that the arc surface forms multiple cutting teeth.

2. The ultrasonic bone scalpel as described in claim 1, characterized in that, The tooth groove (210) is tapered along the extension direction.

3. The ultrasonic bone scalpel as described in claim 2, characterized in that, The included angle between the conical directions of two adjacent tooth grooves (210) is greater than 90 degrees.

4. The ultrasonic bone scalpel as described in claim 1, characterized in that, The inner concave surface of the cutter head (200) is provided with a grinding enhancement part (220), which is a raised structure or a recessed structure.

5. The ultrasonic bone scalpel as described in claim 1, characterized in that, At least two wrench clamping portions (120) are provided circumferentially at intervals on the proximal sidewall of the tool bar (100), and the two wrench clamping portions (120) are arranged opposite to each other; wherein, the wrench clamping portions (120) are located at at least two different distances from the axis of the tool bar (100) along the axial direction of the tool bar (100).

6. The ultrasonic bone scalpel as described in claim 5, characterized in that, The blade holder (100) includes a first segment (130), a second segment (140), a third segment (150), a fourth segment (160), and a fifth segment (170) connected in sequence. The wrench clamping part (120) is disposed at the proximal end of the first segment (130), and the blade head 200 is connected to the distal end of the fifth segment (170). The diameters of the first segment (130) and the third segment (150) are both larger than the diameters of the second segment (140), the fourth segment (160), and the fifth segment (170).

7. The ultrasonic bone scalpel as described in claim 6, characterized in that, The first segment (130) and the third segment (150) have the same diameter.

8. The ultrasonic bone scalpel as described in claim 7, characterized in that, The minimum diameter of the second segment (140) is the same as the minimum diameter of the fourth segment (160).

9. The ultrasonic bone scalpel as described in claim 8, characterized in that, The minimum diameter of the fifth segment (170) is smaller than the minimum diameter of the second segment (140).

10. An ultrasonic bone scalpel system, characterized in that, The ultrasonic bone scalpel system includes an ultrasonic main unit, a transducer, and an ultrasonic bone scalpel as described in any one of claims 1 to 9. The ultrasonic main unit is electrically connected to the transducer and is used to provide electrical energy to the transducer. The transducer is used to convert the electrical energy into mechanical vibration, and the ultrasonic bone scalpel is connected to the transducer.

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