Self-sensing ultrasonic osteotome system

Abstract

The invention discloses a self-sensing ultrasonic osteotome system which comprises a knife handle, a knife head, an ultrasonic transducer, a piezoelectric sensor, a prompting and early warning assembly and a control processor, and the knife head is arranged at the front end of the knife handle; the ultrasonic transducer is arranged in the knife handle and is electrically connected with the power supply and the knife head; the piezoelectric sensor is connected with the ultrasonic transducer and monitors a cutting force signal generated when the tool bit works; the prompt early warning assembly generates corresponding prompt early warning information according to the cutting force signal; the control processor is electrically connected with the ultrasonic transducer, the piezoelectric sensor and the prompting and early warning assembly, processes and analyzes the cutting force signal to judge the working state of the tool bit, and controls the prompting and early warning assembly and the ultrasonic transducer according to a judgment result; the working states of the tool bit comprise a normal cutting state, a critical cutting state, a non-cutting state, an abnormal cutting state, a long-time cutting state and a high-output cutting state; therefore, feedback adjustment and early warning control can be carried out based on the signal processing result, operation conditions can be mastered conveniently, and safety and accuracy are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic bone scalpels, and in particular to a self-sensing ultrasonic bone scalpel system. Background Art

[0002] In orthopedic surgery, ultrasonic bone knives are often used to cut and grind bone tissue. Currently, most ultrasonic bone knives are mainly used for cutting, and are mostly used in spinal surgery. Spinal surgery is difficult to operate, has a complex operating environment, requires extensive experience, and is very prone to accidental cutting injuries due to improper operation, causing secondary injuries to patients. Therefore, the field of spinal surgery has put forward new requirements for the research and development of medical devices. As a new type of surgical instrument, the ultrasonic bone scalpel has the following main advantages over traditional surgical instruments such as bone rongeurs and bone saws: less thermal damage, low possibility of accidental cutting, low operating difficulty, tissue selectivity, short operation time, coagulation properties, etc.

[0003] However, there are still safety issues with ultrasonic bone scalpels during spinal surgery. Taking laminoplasty as an example, the inner layer of cortical bone is covered by nerve tissue and dura mater. These soft tissues are very susceptible to iatrogenic damage, leading to adverse reactions and complications, and severe cases may cause paralysis of the patient. The main reason is that when the doctor operates the ultrasonic bone scalpel, he cannot see the inner layer of the cortical bone. The grasp of the cutting depth and the position of the blade can only rely on the feel of the hand. Therefore, it is very easy to feel a sense of loss due to the rapid decrease in cutting resistance when the ultrasonic bone scalpel head penetrates the inner cortex, which ultimately leads to the ultrasonic bone scalpel accidentally injuring the inner soft tissue. Summary of the Invention

[0004] The main purpose of the present invention is to propose a self-sensing ultrasonic osteotome system to solve the above problems.

[0005] To achieve the above objectives, the present invention proposes a self-sensing ultrasonic osteotome system, comprising:

[0006] knife handle;

[0007] A knife head, provided at the front end of the knife handle;

[0008] an ultrasonic transducer disposed in the knife handle, the ultrasonic transducer being electrically connected to a power source and the knife head to drive the knife head to generate ultrasonic vibration;

[0009] a piezoelectric sensor fixedly connected to the ultrasonic transducer and used to monitor a cutting force signal generated when the ultrasonic transducer drives the cutter head to work;

[0010] a prompt and warning component, configured to generate corresponding prompt and warning information according to the cutting force signal; and

[0011] a control processor, electrically connected to the ultrasonic transducer, the piezoelectric sensor, and the prompt and warning component, configured to process and analyze the cutting force signal transmitted by the piezoelectric sensor to determine the working state of the cutter head, and control the prompt and warning component to generate corresponding prompt and warning information and control the working state of the ultrasonic transducer according to the determination result;

[0012] The working states of the cutter head include a normal cutting state, a critical cutting state, a non-cutting state, an abnormal cutting state, a long-time cutting state, and a high-output cutting state.

[0013] Optionally, the controller includes a control module and a processing module, and the control module is provided with five early warning mechanisms corresponding to the working status of the cutter head. The control module is used to drive the ultrasonic transducer to work, receive the cutting force signal transmitted by the piezoelectric sensor and transmit it to the processing module for processing, and select the corresponding early warning mechanism according to the judgment result of the processing module to control the prompt warning component to generate corresponding prompt warning information and adjust the output power of the ultrasonic transducer in real time to adjust the working status of the cutter head in real time. The processing module is used to receive and process and analyze the cutting force signal transmitted by the control module to obtain the three-way cutting force of the cutter head, so as to judge the working status of the cutter head and generate a judgment result and transmit it to the control module.

[0014] Optionally, the five early warning mechanisms include a first early warning mechanism, a second early warning mechanism, a third early warning mechanism, a fourth early warning mechanism and a fifth early warning mechanism;

[0015] The three-way cutting force of the cutter head includes lateral cutting force, main cutting force and axial piercing cutting force;

[0016] When the three-way cutting force of the cutter head has a cutting force peak F1 at the first preset moment, and the three-way cutting force of the cutter head is not 0 in a subsequent certain time period, and a secondary cutting force peak F2 appears at the second preset moment, and F2>F1, if the change rate of the three-way cutting force is greater than the first warning value, and the three-way cutting force gradually decreases, the processing module determines that the cutter head is in a critical cutting state, and the control module selects the first warning mechanism to control the prompt warning component and the ultrasonic transducer. If the three-way cutting force is 0 in a certain time period, the processing module determines that the cutter head is in a non-cutting state, and the control module selects the second warning mechanism to control the prompt warning component and the ultrasonic transducer. If the lateral cutting force or If the main cutting force is greater than the axial puncture cutting force, the processing module determines that the cutter head is in an abnormal cutting state, and the control module selects the third early warning mechanism to control the prompt and warning component and the ultrasonic transducer. If the working time of the cutter head is greater than the first preset working time and the three-way cutting force is not 0, the processing module determines that the cutter head is in a long-term cutting state, and the control module selects the fourth early warning mechanism to control the prompt and warning component and the ultrasonic transducer. If the single cutting force peak F1 is greater than the warning cutting force peak and the working time of the cutter head is greater than the second preset working time, the processing module determines that the cutter head is in a high-output cutting state, and the control module selects the fifth early warning mechanism to control the prompt and warning component and the ultrasonic transducer.

[0017] Optionally, the prompt warning component includes a player, which stores six audios corresponding to the working status of the cutter head. The player is electrically connected to the control processor and is used to play the corresponding audio according to the output of the control processor.

[0018] Optionally, the six audios stored in the player include a first audio, a second audio, a third audio, a fourth audio, a fifth audio, and a sixth audio;

[0019] When the control module controls the ultrasonic transducer to start at the initial power, the processing module determines that the cutter head is in a normal cutting state, and the control module controls the player to play the first audio;

[0020] When the control module selects the first warning mechanism, the control module controls the player to play the second audio, and controls the ultrasonic transducer to operate at a first power, which is less than the initial power;

[0021] When the control module selects the second warning mechanism, the control module controls the player to play a third audio and turn off the ultrasonic transducer;

[0022] When the control module selects the third warning mechanism, the control module controls the player to play a fourth audio and turn off the ultrasonic transducer;

[0023] When the control module selects the fourth warning mechanism, the control module controls the player to play the fifth audio, and controls the ultrasonic transducer to operate at a second power, which is less than the initial power;

[0024] When the control module selects the fifth warning mechanism, the control module controls the player to play the sixth audio, and controls the ultrasonic transducer to operate at a third power, which is less than the initial power.

[0025] Optionally, the first audio, the second audio and the sixth audio are different music;

[0026] The third audio, the fourth audio, and the fifth audio are different recordings.

[0027] Optionally, the ultrasonic transducer includes a front end cover, a piezoelectric ceramic crystal stack, a rear end cover, and an ultrasonic horn, wherein the ultrasonic horn, the front end cover, and the rear end cover are sequentially arranged along the extension direction of the tool handle, the ultrasonic horn is connected to the tool head, the piezoelectric ceramic crystal stack is arranged between the front end cover and the rear end cover, and the front end cover is connected to the outer shell flange of the tool handle;

[0028] The piezoelectric sensor is arranged on the front end cover.

[0029] Optionally, the self-sensing ultrasonic bone knife system further includes a cooling device, which is connected to the knife head and is used to cool the knife head.

[0030] Optionally, a cooling port is provided at the rear end of the tool handle, a first cooling channel is provided through the ultrasonic transducer, a second cooling channel is provided through the tool head, and the cooling port, the first cooling channel, and the second cooling channel are connected to form a cooling channel;

[0031] The cooling device includes a cooling pipe, which is arranged at the rear end of the tool handle and corresponding to the cooling port to be connected to the cooling channel. The cooling pipe is used to be connected to an external water tank.

[0032] Optionally, the cooling device further comprises a water pump, and the water pump is provided in the cooling pipe;

[0033] The control processor is electrically connected to the water pump to control the working state of the water pump.

[0034] In the technical solution of the present invention, the ultrasonic transducer drives the cutter head to generate ultrasonic vibration, and the piezoelectric sensor monitors the cutting force signal generated by the cutter head when it is working, so as to realize dynamic monitoring and status judgment of the cutting force of the cutter head in the process of cutting bone tissue. Then, the control processor controls the prompt warning component to generate corresponding prompt warning information according to the judgment result, and controls the working status of the ultrasonic transducer in real time. Feedback adjustment and warning control can be performed based on the signal processing result, which is convenient for the operator to accurately grasp the surgical situation in real time and reduce experience dependence. Different response methods can be adopted for various situations during the operation, providing the operator with more reaction time, and can effectively prevent the ultrasonic bone knife from malfunctioning due to human factors, causing iatrogenic damage to the patient, and improving the safety and accuracy of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0036] Figure 1 A schematic structural diagram of an embodiment of the self-sensing ultrasonic osteotome system provided by the present invention;

[0037] Figure 2 for Figure 1 Cross-sectional view of the self-sensing ultrasonic osteotome system;

[0038] Figure 3 for Figure 1 Schematic diagram of part of the structure of the self-sensing ultrasonic osteotome system;

[0039] Figure 4 for Figure 1 Schematic diagram of part of the structure of the self-sensing ultrasonic osteotome system;

[0040] Figure 5 for Figure 1 Schematic diagram of part of the structure of the self-sensing ultrasonic osteotome system;

[0041] Figure 6 for Figure 1 Schematic diagram of part of the structure of the self-sensing ultrasonic osteotome system;

[0042] Figure 7 for Figure 1 Schematic diagram of part of the structure of the self-sensing ultrasonic bone knife system.

[0043] Description of Figure Numbers:

[0044] Label name Label name 100 Self-sensing ultrasonic bone scalpel system 31 Front cover 1 handle 32 Piezoelectric ceramic crystal stack 11 cooling vents 33 rear end cover 12 First shell 34 Ultrasonic horn 13 Second shell 35 The first cooling channel 14 The third shell 36 flange 2 blade 4 Piezoelectric sensors 21 Second cooling channel 5 Stopper 3 Ultrasonic transducer

[0045] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0047] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0048] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0049] However, there are still safety issues with ultrasonic bone scalpels during spinal surgery. Taking laminoplasty as an example, the inner layer of cortical bone is covered by nerve tissue and dura mater. These soft tissues are very susceptible to iatrogenic damage, leading to adverse reactions and complications, and severe cases may cause paralysis of the patient. The main reason is that when the doctor operates the ultrasonic bone scalpel, he cannot see the inner layer of the cortical bone. The grasp of the cutting depth and the position of the blade can only rely on the feel of the hand. Therefore, it is very easy to feel a sense of loss due to the rapid decrease in cutting resistance when the ultrasonic bone scalpel head penetrates the inner cortex, which ultimately leads to the ultrasonic bone scalpel accidentally injuring the inner soft tissue.

[0050] In view of this, the present invention provides a self-sensing ultrasonic osteotome system 100, Figures 1 to 7 This is an embodiment of the self-sensing ultrasonic osteotome system 100 provided by the present invention.

[0051] See also Figures 1 to 7 The self-sensing ultrasonic bone knife system 100 includes a knife handle 1, a knife head 2, an ultrasonic transducer 3, a piezoelectric sensor 4, a prompt and warning component and a control processor. The knife head 2 is arranged at the front end of the knife handle 1; the ultrasonic transducer 3 is arranged in the knife handle 1, and the ultrasonic transducer 3 is used to be electrically connected to the power supply and the knife head 2 to drive the knife head 2 to generate ultrasonic vibration; the piezoelectric sensor 4 is fixedly connected to the ultrasonic transducer 3, and is used to monitor the cutting force signal generated when the ultrasonic transducer 3 drives the knife head 2 to work; the prompt and warning component is used to generate a signal according to the cutting force The signal generates corresponding prompt and warning information; the control processor is electrically connected to the ultrasonic transducer 3, the piezoelectric sensor 4, and the prompt and warning component, and is used to process and analyze the cutting force signal transmitted by the piezoelectric sensor 4 to determine the working state of the cutter head 2, and control the prompt and warning component to generate corresponding prompt and warning information and control the working state of the ultrasonic transducer 3 according to the judgment result; wherein the working state of the cutter head 2 includes normal cutting state, critical cutting state, non-cutting state, abnormal cutting state, long-time cutting state and high-output cutting state.

[0052] In the technical solution of the present invention, the ultrasonic transducer 3 drives the cutter head 2 to generate ultrasonic vibrations, and the piezoelectric sensor 4 monitors the cutting force signal generated by the cutter head 2 when it is working, so as to realize dynamic monitoring and status judgment of the cutting force of the cutter head 2 in the process of cutting bone tissue. Then, the control processor controls the prompt warning component to generate corresponding prompt warning information according to the judgment result, and controls the working status of the ultrasonic transducer 3 in real time. Feedback adjustment and warning control can be performed based on the signal processing result, which is convenient for the operator to accurately grasp the surgical situation in real time and reduce experience dependence. Different response methods can be adopted for various situations during the operation, providing the operator with more reaction time, and can effectively prevent the ultrasonic bone knife from malfunctioning due to human factors, causing iatrogenic damage to the patient, and improving the safety and accuracy of the operation.

[0053] It should be noted that, in the present invention, the arrangement position of the prompt warning component is not limited, and it can be integrated into the knife handle or be arranged separately outside the knife handle.

[0054] Furthermore, the controller includes a control module and a processing module. The control module is provided with five early warning mechanisms corresponding to the working status of the cutter head 2. The control module is used to drive the ultrasonic transducer 3 to work, receive the cutting force signal transmitted by the piezoelectric sensor 4 and transmit it to the processing module for processing, and select the corresponding early warning mechanism according to the judgment result of the processing module to control the prompt warning component to generate corresponding prompt warning information and adjust the output power of the ultrasonic transducer 3 in real time to adjust the working status of the cutter head 2 in real time. The processing module is used to receive and process and analyze the cutting force signal transmitted by the control module to obtain the three-way cutting force of the cutter head 2, so as to judge the working status of the cutter head 2 and generate a judgment result and transmit it to the control module.

[0055] More specifically, the processing module obtains the three-directional component force, i.e., the three-directional cutting force of the cutter head 2, through decoupling operation based on the mapping relationship between the cutting force and the change of the cutting force signal transmitted by the piezoelectric sensor 4. The three-directional cutting force includes three-directional component forces: the main bone cutting force, the bone cutting lateral force and the bone knife puncture axial force.

[0056] Furthermore, the processing module performs filtering and intelligent identification on the cutting force signal, intelligently identifies the current cutting force and cutting position based on the characteristics of the cutting force signal, and determines in real time whether the cutting state is normal.

[0057] Furthermore, the five early warning mechanisms include a first early warning mechanism, a second early warning mechanism, a third early warning mechanism, a fourth early warning mechanism and a fifth early warning mechanism.

[0058] When the three-dimensional cutting force of the cutter head 2 reaches a peak value F1 at a first preset moment, and the three-dimensional cutting force of the cutter head 2 is not zero within a certain subsequent time period, and a secondary cutting force peak value F2 occurs at a second preset moment, and F2>F1, the subsequent cutting force signal changes as follows, i.e., the cutter head 2 is in the following working state, the control module will select the corresponding early warning mechanism for feedback adjustment and early warning control:

[0059] If the rate of change of the three-dimensional cutting force is greater than the first warning value and the three-dimensional cutting force gradually decreases, the processing module determines that the cutter head 2 is in a critical cutting state. At this time, the cutting position of the cutter head 2 is about to penetrate the inner cortex and cut into soft tissue. The control module selects the first warning mechanism to control the prompt warning component and the ultrasonic transducer 3. It should be noted that if the value of the three-dimensional cutting force continues to be 0 for a certain period of time, the control module will no longer select the first warning mechanism, and will reset the peak value recorded for the three-dimensional cutting force to zero, and re-judge and select.

[0060] If the three-way cutting force is 0 within a certain period of time, the processing module determines that the cutter head 2 is in a non-cutting state, and the control module selects the second warning mechanism to control the prompt warning component and the ultrasonic transducer 3.

[0061] If the lateral cutting force or the main cutting force among the three-directional cutting forces is greater than the axial puncture cutting force, the processing module determines that the cutter head 2 is in an abnormal cutting state. At this time, iron surgical instruments such as injection straws accidentally touch the cutter head 2, or other abnormal hard objects contact the cutter head 2 for more than a specified time. The control module selects the third warning mechanism to control the prompt warning component and the ultrasonic transducer 3.

[0062] If the working time of the cutter head 2 is greater than the first preset working time and the three-way cutting force is not 0, the processing module determines that the cutter head 2 is in a long-time cutting state, and the control module selects the fourth warning mechanism to control the prompt warning component and the ultrasonic transducer 3.

[0063] If the single cutting force peak F1 is greater than the warning cutting force peak, and the working time of the cutter head 2 is greater than the second preset working time, the processing module determines that the cutter head 2 is in a high-output cutting state, and the control module selects the fifth warning mechanism to control the prompt warning component and the ultrasonic transducer 3.

[0064] Furthermore, the prompt warning component includes a player, which stores six audios corresponding to the working status of the cutter head 2. The player is electrically connected to the control processor and is used to play the corresponding audio according to the output of the control processor.

[0065] Furthermore, the audio is music or recording.

[0066] Furthermore, the six audio files stored in the player include a first audio file, a second audio file, a third audio file, a fourth audio file, a fifth audio file, and a sixth audio file. More specifically, in one embodiment of the present invention, the first audio file, the second audio file, and the sixth audio file are different music files; and the third audio file, the fourth audio file, and the fifth audio file are different recordings.

[0067] When the control module controls the ultrasonic transducer 3 to initially start up at an initial power level, the processing module determines that the cutter head 2 is in a normal cutting state, and the control module controls the player to play a first audio signal. Thus, since the first audio signal is music, when the cutter head 2 is initially started up, the music signal indicates that the cutter head 2 has entered a normal cutting state, i.e., that the cutter head 2 is cutting smoothly and normally.

[0068] When the control module selects the first early warning mechanism, the control module controls the player to play the second audio and controls the ultrasonic transducer 3 to operate at a first power, which is less than the initial power; in this way, based on the fact that the second audio is music different from the first audio, the music indicates that the cutter head 2 has entered a critical cutting state, prompting the operator to change the operating mode appropriately.

[0069] When the control module selects the second warning mechanism, it controls the player to play a third audio signal and shut down the ultrasonic transducer 3. Thus, while providing an audio warning, the ultrasonic transducer 3 is turned off to stop driving the blade 2, thereby preventing the lifespan from being shortened due to prolonged idle excitation. More specifically, in one embodiment of the present invention, the third audio signal reads, "Detected that the ultrasonic osteotome is not cutting. Please check the working status." This indicates that the blade 2 is not currently cutting, prompting the operator to perform the appropriate operation as soon as possible.

[0070] When the control module selects the third warning mechanism, the control module controls the player to play the fourth audio and turn off the ultrasonic transducer 3. In this way, while providing a warning via audio, the ultrasonic transducer 3 stops driving the blade 2, thereby preventing the blade 2 from accidentally touching other surgical instruments and causing damage, or knocking off iron filings from other iron surgical instruments, causing iatrogenic injury to the patient. More specifically, in one embodiment of the present invention, the content of the fourth audio is "An abnormal operation of the ultrasonic osteotome has been detected. Please adjust it immediately to avoid damage." This indicates that the blade 2 has accidentally touched other surgical instruments, prompting the operator to perform the correct operation as soon as possible.

[0071] When the control module selects the fourth warning mechanism, the control module controls the player to play the fifth audio and controls the ultrasonic transducer 3 to operate at a second power, which is less than the initial power. In this way, while providing a warning via the audio, the ultrasonic transducer 3 is turned off and the drive of the blade 2 is stopped, thereby preventing the blade 2 from fatigue fracture due to prolonged operation or scalding the patient's tissue due to excessive temperature of the blade 2. More specifically, in one embodiment of the present invention, the content of the fifth audio is "The ultrasonic osteotome has been operating for too long. Please stop driving and cool it down. Wait until the ultrasonic osteotome has completely cooled before use." This indicates that the blade 2 has been operating at a high temperature for a long time, prompting the operator to cool it down as soon as possible.

[0072] When the control module selects the fifth warning mechanism, the control module controls the player to play the sixth audio and controls the ultrasonic transducer 3 to operate at a third power, which is lower than the initial power. In this way, while providing an audio warning, the output power of the ultrasonic transducer 3 is reduced to avoid misjudgment during the cortical bone cutting process by the cutter head 2 due to the lack of clear cortical bone stratification cutting force characteristics due to high cutting efficiency.

[0073] Specifically, the prompt and warning component further includes a display, which is electrically connected to the control processor and is configured to display prompt and warning text images corresponding to the working status of the cutter head 2. In this way, the working status of the cutter head 2 can be checked at any time through the display, and the surgical status can be monitored in real time.

[0074] For details, please refer to Figure 2 and Figure 3 The ultrasonic transducer 3 includes a front end cover 31, a piezoelectric ceramic crystal stack 32, a rear end cover 33 and an ultrasonic horn 34. The ultrasonic horn 34, the front end cover 31 and the rear end cover 33 are arranged in sequence along the extension direction of the tool handle 1. The ultrasonic horn 34 is connected to the tool head 2. The piezoelectric ceramic crystal stack 32 is arranged between the front end cover 31 and the rear end cover 33. The front end cover 31 is connected to the outer shell flange of the tool handle 1; the piezoelectric sensor 4 is arranged on the front end cover 31.

[0075] For more details, see Figure 2 、 Figures 5 to 7 The outer shell of the knife handle 1 includes a first shell portion 12, a second shell portion 13 and a third shell portion 14 connected in sequence along its extension direction. The cutter head 2 is inserted into one end of the first shell portion 12, one end of the second shell portion 13 is sleeved on the outer periphery of the other end of the first shell portion 12, and is threadedly connected to the first shell portion 12, one end of the third shell portion 14 is sleeved on the outer periphery of the other end of the second shell portion 13, and a stop portion 5 is provided inside the second shell portion 13.

[0076] Further, see Figure 2 and Figure 6 The ultrasonic horn 34 and the front end cover 31 are arranged in the first shell 12, the piezoelectric ceramic stack 32 is arranged in the second shell 13, and the rear end cover 33 is arranged in the third shell 14. The piezoelectric sensor 4 is pressed onto the flange 36 on the front end cover 31 through the stop portion 5 to detect the cutting force transmitted by the cutter head 2 through the ultrasonic horn 34 and the front end cover 31.

[0077] Furthermore, flexible gaskets are provided between the flange 36 and the piezoelectric sensor 4 and the stopper 5 , and between the piezoelectric sensor 4 and the stopper 5 , respectively, to reduce component damage caused by rigid friction.

[0078] Specifically, the self-sensing ultrasonic bone knife system 100 also includes a cooling device, which is connected to the knife head 2 and is used to cool the knife head 2.

[0079] Further, see Figure 2 and Figure 5 The rear end of the tool handle 1 is provided with a cooling port, the ultrasonic transducer 3 is provided with a first cooling channel 35, and the cutter head 2 is provided with a second cooling channel. The cooling port, the first cooling channel 35, and the second cooling channel are connected to form a cooling channel. The cooling device includes a cooling pipe, which is provided at the rear end of the tool handle 1 and is arranged corresponding to the cooling port to connect to the cooling channel. The cooling pipe is used to connect to an external water tank. In this way, the cooling water in the water tank flows through the cooling pipe to the cooling channel and reaches the cutter head 2, thereby cooling the cutter head 2.

[0080] More specifically, in order to ensure the airtightness of the tool handle 1, a sealing ring is provided between the cooling port and the cooling pipe.

[0081] Furthermore, the cooling device further includes a water pump, which is installed in the cooling pipe; the control processor is electrically connected to the water pump to control the operating state of the water pump. In this way, water in the water tank can be pumped into the cooling channel by the water pump, and the water pump can be turned on or off by the control processor according to actual conditions, so that water can be pumped in time to cool the cutter head 2 when the control module selects the fourth warning mechanism.

[0082] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A self-sensing ultrasonic osteotome system, characterized in that: The self-sensing ultrasonic osteotome system includes: knife handle; A knife head, provided at the front end of the knife handle; an ultrasonic transducer disposed in the knife handle, the ultrasonic transducer being electrically connected to a power source and the knife head to drive the knife head to generate ultrasonic vibration; a piezoelectric sensor fixedly connected to the ultrasonic transducer and used to monitor a cutting force signal generated when the ultrasonic transducer drives the cutter head to work; a prompt and warning component, configured to generate corresponding prompt and warning information according to the cutting force signal; and a control processor, electrically connected to the ultrasonic transducer, the piezoelectric sensor, and the prompt and warning component, configured to process and analyze the cutting force signal transmitted by the piezoelectric sensor to determine the working state of the cutter head, and control the prompt and warning component to generate corresponding prompt and warning information and control the working state of the ultrasonic transducer according to the determination result; The working states of the cutter head include a normal cutting state, a critical cutting state, a non-cutting state, an abnormal cutting state, a long-time cutting state, and a high-output cutting state.

2. The self-sensing ultrasonic osteotome system according to claim 1, characterized in that: The controller includes a control module and a processing module. The control module is provided with five early warning mechanisms corresponding to the working status of the cutter head. The control module is used to drive the ultrasonic transducer to work, receive the cutting force signal transmitted by the piezoelectric sensor and transmit it to the processing module for processing, and select the corresponding early warning mechanism according to the judgment result of the processing module to control the prompt warning component to generate corresponding prompt warning information and adjust the output power of the ultrasonic transducer in real time to adjust the working status of the cutter head in real time. The processing module is used to receive and process and analyze the cutting force signal transmitted by the control module to obtain the three-way cutting force of the cutter head, so as to judge the working status of the cutter head and generate a judgment result and transmit it to the control module.

3. The self-sensing ultrasonic osteotome system according to claim 2, characterized in that: The five early warning mechanisms include a first early warning mechanism, a second early warning mechanism, a third early warning mechanism, a fourth early warning mechanism, and a fifth early warning mechanism; The three-way cutting force of the cutter head includes lateral cutting force, main cutting force and axial piercing cutting force; When the three-way cutting force of the cutter head has a cutting force peak F1 at the first preset moment, and the three-way cutting force of the cutter head is not 0 in a subsequent certain time period, and a secondary cutting force peak F2 appears at the second preset moment, and F2>F1, if the change rate of the three-way cutting force is greater than the first warning value, and the three-way cutting force gradually decreases, the processing module determines that the cutter head is in a critical cutting state, and the control module selects the first warning mechanism to control the prompt warning component and the ultrasonic transducer. If the three-way cutting force is 0 in a certain time period, the processing module determines that the cutter head is in a non-cutting state, and the control module selects the second warning mechanism to control the prompt warning component and the ultrasonic transducer. If the lateral cutting force or If the main cutting force is greater than the axial puncture cutting force, the processing module determines that the cutter head is in an abnormal cutting state, and the control module selects the third early warning mechanism to control the prompt and warning component and the ultrasonic transducer. If the working time of the cutter head is greater than the first preset working time and the three-way cutting force is not 0, the processing module determines that the cutter head is in a long-term cutting state, and the control module selects the fourth early warning mechanism to control the prompt and warning component and the ultrasonic transducer. If the single cutting force peak F1 is greater than the warning cutting force peak and the working time of the cutter head is greater than the second preset working time, the processing module determines that the cutter head is in a high-output cutting state, and the control module selects the fifth early warning mechanism to control the prompt and warning component and the ultrasonic transducer.

4. The self-sensing ultrasonic osteotome system according to claim 3, characterized in that: The prompt warning component includes a player, which stores six audios corresponding to the working status of the cutter head. The player is electrically connected to the control processor and is used to play the corresponding audio according to the output of the control processor.

5. The self-sensing ultrasonic osteotome system according to claim 4, characterized in that: The six audios stored in the player include a first audio, a second audio, a third audio, a fourth audio, a fifth audio, and a sixth audio; When the control module controls the ultrasonic transducer to start at the initial power, the processing module determines that the cutter head is in a normal cutting state, and the control module controls the player to play the first audio; When the control module selects the first warning mechanism, the control module controls the player to play the second audio, and controls the ultrasonic transducer to operate at a first power, which is less than the initial power; When the control module selects the second warning mechanism, the control module controls the player to play a third audio and turn off the ultrasonic transducer; When the control module selects the third warning mechanism, the control module controls the player to play a fourth audio and turn off the ultrasonic transducer; When the control module selects the fourth warning mechanism, the control module controls the player to play the fifth audio, and controls the ultrasonic transducer to operate at a second power, which is less than the initial power; When the control module selects the fifth warning mechanism, the control module controls the player to play the sixth audio, and controls the ultrasonic transducer to operate at a third power, which is less than the initial power.

6. The self-sensing ultrasonic osteotome system according to claim 5, characterized in that: The first audio, the second audio, and the sixth audio are different music; The third audio, the fourth audio, and the fifth audio are different recordings.

7. The self-sensing ultrasonic osteotome system according to claim 1, characterized in that: The ultrasonic transducer includes a front end cover, a piezoelectric ceramic crystal stack, a rear end cover, and an ultrasonic horn. The ultrasonic horn, the front end cover, and the rear end cover are sequentially arranged along the extension direction of the tool handle. The ultrasonic horn is connected to the tool head. The piezoelectric ceramic crystal stack is arranged between the front end cover and the rear end cover. The front end cover is connected to the outer shell flange of the tool handle. The piezoelectric sensor is arranged on the front end cover.

8. The self-sensing ultrasonic osteotome system according to claim 1, characterized in that: The self-sensing ultrasonic bone knife system also includes a cooling device, which is connected to the knife head and is used to cool the knife head.

9. The self-sensing ultrasonic osteotome system according to claim 8, characterized in that: A cooling port is provided at the rear end of the tool handle, a first cooling channel is provided through the ultrasonic transducer, and a second cooling channel is provided through the tool head, wherein the cooling port, the first cooling channel, and the second cooling channel are connected to form a cooling channel; The cooling device includes a cooling pipe, which is arranged at the rear end of the tool handle and corresponding to the cooling port to be connected to the cooling channel. The cooling pipe is used to be connected to an external water tank.

10. The self-sensing ultrasonic osteotome system according to claim 9, characterized in that: The cooling device further comprises a water pump, which is arranged on the cooling pipe; The control processor is electrically connected to the water pump to control the working state of the water pump.

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