Self-adaptive ultrasonic scalpel head system with pressure judgment function

Abstract

The invention relates to a self-adaptive ultrasonic scalpel head system with a pressure judgment function. The problems that in the prior art, in the using process of an ultrasonic knife, due to aging of a transducer and too large pressure of a knife head, metal aging of the knife head is accelerated, breakage or cracks occur, and the abrasion resistance of a clamp head is reduced are solved. An assembling cavity is formed in the upper end of the holding handle, an ultrasonic scalpel inner tube is connected to the assembling cavity in an inserted mode, an ultrasonic scalpel rod is arranged at the end of the ultrasonic scalpel inner tube, a forceps rod linkage barrel is arranged on the outer side of the ultrasonic scalpel inner tube in the circumferential direction in a sliding mode, a movable forceps head is arranged at one end of the forceps rod linkage barrel, and a transducer is arranged at one end of the assembling cavity. A forceps rod linkage assembly is arranged at one end of the forceps rod linkage barrel and connected with the transducer through a conductive assembly, and a trigger is arranged on the front side of the holding handle and connected with a linkage mechanism arranged in the assembling cavity. The self-adaptive cutting pliers have the advantages that the cutting effect can be controlled in a self-adaptive mode, excessive abrasion of the pliers head is prevented, and therefore the stability of the clamping force of the pliers head is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of ultrasonic scalpels, and in particular to an adaptive ultrasonic scalpel head system with pressure judgment. Background Art

[0002] An ultrasonic scalpel, also known as an ultrasonic scalpel, is an instrument that further amplifies ultrasonic vibrations generated by a piezoelectric transducer and uses the amplified ultrasonic vibrations at the scalpel head to cut and coagulate soft tissue. Clinically, this instrument can achieve lesion excision at lower temperatures and with less bleeding, while minimizing lateral thermal damage to the tissue. With the increasing popularity of minimally invasive surgery, ultrasonic scalpels have become a common surgical instrument. The ultrasonic scalpel operates by using a phase-locked algorithm to adjust the transducer's operating frequency in real time, based on factors such as actual impedance changes and piezoelectric crystal temperature fluctuations, to maximize transducer efficiency. Existing ultrasonic scalpels rely solely on the physician's observation to determine when tissue cutting has been completed. This can result in significant errors: premature termination can lead to surgical failure, while delayed termination can cause wear on the jaw gasket, shortening the lifespan of the scalpel. Furthermore, during use, the aging of the transducer and excessive pressure on the blade tip can accelerate the aging of the blade tip metal, leading to breakage or cracks. This reduces the wear resistance of the forceps tip and causes unstable clamping force during subsequent surgeries, compromising surgical precision and safety.

[0003] To address the shortcomings of existing technologies, researchers have conducted extensive research and proposed various solutions. For example, a Chinese patent document discloses an ultrasonic scalpel adaptive control method and system for ending tissue shearing [CN202011207557.4]. The method involves obtaining real-time operating frequency data of the ultrasonic scalpel to form a frequency change curve; performing a function operation on the obtained frequency data to obtain a frequency change characteristic value; determining the progress of each stage of the ultrasonic scalpel based on the frequency change characteristic value; determining when the ultrasonic scalpel has reached the end point of tissue shearing, and at that time, reducing the ultrasonic scalpel control current and generating a prompt to end shearing.

[0004] The above solution has solved to a certain extent the problem in the prior art that it is difficult to judge after the ultrasonic scalpel shearing is completed, which easily leads to continuous wear of the jaws and gasket. However, this solution still has many shortcomings. For example, during use, the aging of the transducer and the excessive pressure of the blade will accelerate the aging of the blade metal, causing breakage or cracks, resulting in reduced wear resistance of the pliers head, causing unstable clamping force during subsequent operations, affecting the accuracy and safety of the operation. Summary of the Invention

[0005] The purpose of the present invention is to provide an adaptive ultrasonic blade system with pressure judgment to solve the above problems.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: an adaptive ultrasonic blade head system with pressure judgment, comprising a gripping handle, an assembly cavity provided at the upper end of the gripping handle, an ultrasonic blade inner tube plugged into the assembly cavity, an ultrasonic blade inner tube end provided with an ultrasonic blade rod, and a clamp rod linkage cylinder sliding circumferentially outwardly on the ultrasonic blade inner tube, one end of the clamp rod linkage cylinder is provided with a movable clamp head corresponding to the ultrasonic blade rod, and one end of the assembly cavity is provided with a transducer connected to the ultrasonic blade main unit, a clamp rod linkage assembly is provided at the end of the clamp rod linkage cylinder away from the movable clamp head, the clamp rod linkage assembly is connected to the transducer through a conductive assembly, a trigger is provided on the front side of the gripping handle, and the trigger is connected to the linkage mechanism arranged in the assembly cavity.

[0007] In the above-mentioned adaptive ultrasonic scalpel head system with pressure judgment, the clamp rod linkage assembly includes a locking sleeve, a clamping sleeve is inserted into one end of the locking sleeve, and a small wave spring seat and a large wave spring seat are provided on the locking sleeve, a small wave spring is provided between the small wave spring seat and the large wave spring seat, and a large wave spring is provided between the large wave spring seat and the clamping sleeve.

[0008] In the above-mentioned adaptive ultrasonic blade head system with pressure judgment, a number of connecting rod seats are provided on the ferrule, and a connecting hook is provided at the end of the connecting rod seat, and the connecting hook is connected to the linkage positioning hole on the circumferential outer wall of the clamp rod linkage cylinder. An annular film pressure sensor is provided on the inner wall of the ferrule, and one side of the annular film pressure sensor is arranged to abut against the large wave spring.

[0009] In the above-mentioned adaptive ultrasonic scalpel head system with pressure judgment, the conductive component includes a conductive seat, on which a current sampling electrode and a voltage sampling electrode are respectively provided. The current sampling electrode is connected to the annular film pressure sensor through a current sampling circuit, and the voltage sampling electrode is connected to the annular film pressure sensor through a voltage sampling circuit. The current sampling electrode and the voltage sampling electrode are both connected to the transducer and transmit the voltage and current data to the ultrasonic scalpel host through the transducer.

[0010] In the above-mentioned adaptive ultrasonic blade system with pressure judgment, the linkage mechanism includes a linkage seat arranged in the assembly cavity and connected to the trigger, and a horizontal push rod is provided at the upper end of the linkage seat, the rear end of the horizontal push rod is connected to one end of the linkage seat through a rotating support rod, and the front end of the horizontal push rod is connected to the linkage seat through a linkage support rod.

[0011] In the above-mentioned adaptive ultrasonic blade system with pressure judgment, the horizontal push rod includes a horizontal moving part, a connecting part is provided at one end of the horizontal moving part, an arc-shaped linkage part is provided at the upper end of the connecting part, and the arc-shaped linkage part is clamped in the clamping gap between the locking sleeve and the wavelet spring seat, a stroke limit groove is provided on the inner wall of the assembly cavity, and a limit connecting rod is provided on the horizontal part and inserted into the stroke limit groove.

[0012] In the above-mentioned adaptive ultrasonic blade system with pressure judgment, the conductive seat is connected to the conductive electrode through a conductive line, and the upper and lower ends of the conductive electrode are respectively provided with conductive contacts and connection contacts. A positioning connection seat is provided in the assembly cavity, and the upper end of the positioning connection seat is connected to a pressing conductive seat through an elastic reset member, and the inner wall of the positioning connection seat is provided with a connecting portion corresponding to the connection contact, and the pressing conductive seat is provided with a conductive portion corresponding to the conductive contact.

[0013] In the above-mentioned adaptive ultrasonic scalpel system with pressure judgment, after the trigger is pulled to the bottom, during the process of the movable clamp head being pressed together, the parts in the clamp rod linkage cylinder that have a change in stroke are: inner tube L 内 , small wave spring L 小 , Large Wave Spring L 大 , and the sum of the stroke lengths of the three components is a constant, namely L 内 +L 小 +L 大 =△L.

[0014] In the above-mentioned adaptive ultrasonic blade system with pressure judgment, L 内 +L 小 +L 大 =△L to get L 内 =△L-(L 小 +L 大 ), L 内 Feedback of the pressing angle α between the movable clamp head and the ultrasonic knife rod 瞬 ; Set the upper and lower thresholds of α, where:

[0015] Upper threshold α 上 It is the normal opening angle when the movable clamp head is not pressed together.

[0016] Lower threshold α 下 The minimum acceptable pressing angle of the movable forceps head is the angle at which the tissue pad wear is acceptable;

[0017] When the angle α 瞬 Less than α 下 When the ultrasonic knife host reduces the transducer output power.

[0018] In the above-mentioned adaptive ultrasonic knife head system with pressure judgment, the ultrasonic knife host calculates the time difference between the zero crossing points of two adjacent current signals through the current signal, which is ΔT, the frequency f = 1 / (2ΔT), the phase difference between the voltage U and the current I is θ, and the impedance Z = (U / I)*cosθ.

[0019] Compared with existing technologies, the present invention has the advantage of monitoring the voltage and current output of the ultrasonic scalpel main unit in real time, thereby calculating the corresponding impedance. The ultrasonic scalpel main unit then compares the impedance and frequency changes with the set normal impedance and frequency thresholds to determine whether the ultrasonic scalpel is operating normally. If the threshold is exceeded, the transducer output power is reduced, the cutting effect is weakened, and the coagulation effect is correspondingly enhanced. At the same time, the tissue pad is protected from excessive wear, thereby ensuring stable clamping force of the forceps head, improving service life and surgical precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the assembly cavity in the present invention;

[0022] Figure 3 It is a partial structural schematic diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the pressing angle between the movable clamp head and the ultrasonic knife rod in the present invention;

[0024] Figure 5 This is a working diagram of the ultrasonic scalpel host in the present invention;

[0025] Figure 6 This is a flow chart of the ultrasonic knife host pressure judgment in the present invention;

[0026] In the figure: holding handle 1, assembly cavity 11, ultrasonic scalpel inner tube 12, ultrasonic scalpel rod 13, clamp rod linkage cylinder 14, movable clamp head 141, trigger 15, ultrasonic scalpel main unit 2, transducer 21, clamp rod linkage assembly 3, locking sleeve 31, clamping sleeve 32, connecting rod seat 321, connecting hook 322, annular film pressure sensor 323, small wave spring seat 33, large wave spring seat 34, small wave spring 35, large wave spring 36, conductive component 4, conductive Electric base 41, conducting circuit 411, conducting electrode 412, conducting contact 413, connecting contact 414, positioning connecting base 415, pressing conducting base 416, connecting part 417, conducting part 418, current sampling electrode 42, voltage sampling electrode 43, linkage mechanism 5, linkage base 51, horizontal push rod 52, horizontal moving part 521, connecting part 522, arc-shaped linkage part 523, travel limit groove 524, rotating support rod 53, linkage support rod 54. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] like Figure 1-6As shown, an adaptive ultrasonic scalpel head system with pressure judgment includes a gripping handle 1, an assembly cavity 11 is provided at the upper end of the gripping handle 1, an ultrasonic scalpel inner tube 12 is plugged into the assembly cavity 11, an ultrasonic scalpel inner tube 12 is provided at the end of the ultrasonic scalpel inner tube 12, and a clamp rod linkage cylinder 14 is provided for sliding outwardly of the ultrasonic scalpel inner tube 12, one end of the clamp rod linkage cylinder 14 is provided with a movable clamp head 141 corresponding to the ultrasonic scalpel rod 13, and one end of the assembly cavity 11 is provided with a transducer 21 connected to the ultrasonic scalpel host 2, a clamp rod linkage component 3 is provided at the end of the clamp rod linkage cylinder 14 away from the movable clamp head 141, the clamp rod linkage component 3 is connected to the transducer 21 through a conductive component 4, a trigger 15 is provided on the front side of the gripping handle 1, and the trigger 15 is connected to the linkage mechanism 5 arranged in the assembly cavity 11.

[0029] During cutting, the ultrasonic scalpel host 2 outputs electrical energy to the transducer 21, and the piezoelectric ceramics inside the transducer 21 convert the electrical energy into mechanical energy. The ultrasonic scalpel inner tube 12 transmits the energy to the ultrasonic scalpel rod 13 at the top. The trigger 15 is pulled to clamp the tissue between the movable clamp head 141 and the ultrasonic scalpel rod 13. The high-frequency ultrasonic oscillation vaporizes the water in the contacted tissue cells, thereby achieving the cutting effect.

[0030] Among them, the clamp rod linkage assembly 3 includes a locking sleeve 31, one end of which is plugged with a clamping sleeve 32, and a small wave spring seat 33 and a large wave spring seat 34 are provided on the locking sleeve 31, a small wave spring 35 is provided between the small wave spring seat 33 and the large wave spring seat 34, and a large wave spring 36 is provided between the large wave spring seat 34 and the clamping sleeve 32.

[0031] Obviously, a connecting rod seat 321 is provided at the front end of the clamping sleeve 32, and a pressure spring is provided between the connecting rod seat 321 and the clamping sleeve 32, a connecting hook 322 is provided at the end of the connecting rod seat 321, and the connecting hook 322 is clamped in the linkage positioning hole of the circumferential outer wall of the clamp rod linkage cylinder 14, an annular film pressure sensor 323 is provided on the inner wall of the clamping sleeve 32, and one side of the annular film pressure sensor 323 is arranged to abut against each other with the large wave spring 36.

[0032] Furthermore, the conductive component 4 includes a conductive seat 41, on which a current sampling electrode 42 and a voltage sampling electrode 43 are respectively provided. The current sampling electrode 42 is connected to the annular film pressure sensor 323 through a current sampling circuit, and the voltage sampling electrode 43 is connected to the annular film pressure sensor 323 through a voltage sampling circuit. The current sampling electrode 42 and the voltage sampling electrode 43 are both connected to the transducer 21 and transmit the voltage and current data to the ultrasonic knife host 2 through the transducer 21.

[0033] The annular film pressure sensor 323 is used to monitor the force F1 applied to the pressure sensor. The total deformation of the wave spring is calculated by comparing it with the deformation-force value diagram. The output power of the transducer 21 is adjusted based on the upper and lower thresholds of the deformation.

[0034] Furthermore, the linkage mechanism 5 includes a linkage seat 51 arranged in the assembly cavity 11 and connected to the trigger 15, and a horizontal push rod 52 is provided at the upper end of the linkage seat 51. The rear end of the horizontal push rod 52 is connected to one end of the linkage seat 51 through a rotating support rod 53, and the front end of the horizontal push rod 52 is connected to the linkage seat 51 through a linkage support rod 54.

[0035] Specifically, the horizontal push rod 52 includes a horizontal moving portion 521, a connecting portion 522 is provided at one end of the horizontal moving portion 521, and an arc-shaped linkage portion 523 is provided at the upper end of the connecting portion 522. The arc-shaped linkage portion 523 is clamped in the clamping gap between the locking sleeve 31 and the wavelet spring seat 33. A stroke limit groove 524 is provided on the inner wall of the assembly cavity 11, and a limit connecting rod is provided on the horizontal portion and inserted into the stroke limit groove 524.

[0036] When the trigger 15 is pulled, the horizontal push rod 52 is driven forward by the linkage seat 51, and the inner tube connected to the rear end of the clamp rod linkage cylinder 14 is driven forward by the arc-shaped linkage portion 523, thereby controlling the clamping angle of the movable clamp head 141.

[0037] More specifically, the conductive seat 41 is connected to the conductive electrode 412 through the conductive line 411, and the upper and lower ends of the conductive electrode 412 are respectively provided with a conductive contact 413 and a connecting contact 414. A positioning connecting seat 415 is provided in the assembly cavity 11, and the upper end of the positioning connecting seat 415 is connected to a pressing conductive seat 416 through an elastic reset member, and the inner wall of the positioning connecting seat 415 is provided with a connecting portion 417 corresponding to the connecting contact 414, and the pressing conductive seat 416 is provided with a conductive portion 418 corresponding to the conductive contact 413.

[0038] Pressing the conductive seat 416 is to turn on the switch, which is used to conduct the power of the ultrasonic knife rod 13.

[0039] In detail, after the trigger 15 is pulled to the bottom, during the process of the movable clamp head 141 being pressed together, the parts in the clamp rod linkage cylinder 14 that have a change in stroke are: the inner tube L 内 , small wave spring 35L 小 , Large wave spring 36L 大 , and the sum of the stroke lengths of the three components is a constant, namely L 内 +L 小 +L 大 =△L.

[0040] Preferably, by L 内 +L 小 +L大 =△L to get L 内 =△L-(L 小 +L 大 ), L 内 Feedback movable clamp head 141 and ultrasonic knife rod 13 pressing angle α 瞬 ; Set the upper and lower thresholds of α, where:

[0041] Upper threshold α 上 is the normal opening angle of the movable clamp head 141 when it is not pressed together,

[0042] Lower threshold α 下 is the acceptable minimum pressing angle of the movable forceps 141, and the wear of the tissue pad at this angle is an acceptable wear angle;

[0043] When the angle α 瞬 Less than α 下 When , the ultrasonic knife host 2 reduces the output power of the transducer 21.

[0044] In addition, the ultrasonic knife host 2 calculates the time difference between the zero crossing points of two adjacent current signals through the current signal, which is ΔT, the frequency f = 1 / (2ΔT), the phase difference between the voltage U and the current I is θ, and the impedance Z = (U / I)*cosθ.

[0045] In summary, the principle of this embodiment is: by adding an annular film pressure sensor 323 between the ferrule 32 and the large wave spring 36, and using the adhesive backing to stick it on the side of the ferrule close to the large wave spring 36; after installation, the annular film pressure sensor 323 is connected to the voltage sampling electrode 43 and the current sampling electrode 42 of the conductive component through the voltage sampling circuit and the current sampling circuit, and the voltage sampling electrode 43 and the current sampling electrode 42 are connected to the inside of the transducer 21, and the voltage information and current information received by the annular film pressure sensor 323 are transmitted to the ultrasonic scalpel host 2 through the transducer 21. The data received by the ultrasonic scalpel host 2 is the force exerted on the annular film pressure sensor 323. By comparing the "deformation variable-force value diagram", the ultrasonic scalpel host 2 can obtain L 小 +L 大 The value of L 内 +L 小 +L 大 =△L formula to get L 内 =△L-(L 小 +L 大 ). L 内 Direct feedback calculation to the clamp head and tool bar pressing angle α 瞬 ; less than α 下 When , the ultrasonic knife host 2 reduces the transducer output power, the cutting effect is weakened, and the coagulation effect is correspondingly enhanced, while protecting the tissue pad and preventing it from excessive wear.

[0046] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0047] Although this article uses more of the holding handle 1, the assembly cavity 11, the ultrasonic knife inner tube 12, the ultrasonic knife rod 13, the clamp rod linkage cylinder 14, the movable clamp head 141, the trigger 15, the ultrasonic knife host 2, the transducer 21, the clamp rod linkage component 3, the locking sleeve 31, the clamping sleeve 32, the connecting rod seat 321, the connecting hook 322, the annular film pressure sensor 323, the small wave spring seat 33, the large wave spring seat 34, the small wave spring 35, the large wave spring 36, the conductive component 4, the conductive seat 41, the conductive The terms such as the conducting line 411, the conducting electrode 412, the conducting contact 413, the connecting contact 414, the positioning connecting seat 415, the pressing conducting seat 416, the connecting portion 417, the conducting portion 418, the current sampling electrode 42, the voltage sampling electrode 43, the linkage mechanism 5, the linkage seat 51, the horizontal push rod 52, the horizontal moving portion 521, the connecting portion 522, the arc-shaped linkage portion 523, the travel limit groove 524, the rotating support rod 53, and the linkage support rod 54 are used, but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. An adaptive ultrasonic scalpel head system with pressure judgment, comprising a gripping handle (1), wherein an assembly cavity (11) is provided at the upper end of the gripping handle (1), an ultrasonic scalpel inner tube (12) is plugged and connected to the assembly cavity (11), an ultrasonic scalpel rod (13) is provided at the end of the ultrasonic scalpel inner tube (12), and a clamp rod linkage cylinder (14) is provided on the circumferential outer side of the ultrasonic scalpel inner tube (12) for sliding, one end of the clamp rod linkage cylinder (14) is provided with a movable clamp head (141) corresponding to the ultrasonic scalpel rod (13), and one end of the assembly cavity (11) is provided with a transducer (21) connected to the ultrasonic scalpel host (2), characterized in that: A pliers rod linkage assembly (3) is provided at one end of the pliers rod linkage cylinder (14) away from the movable pliers head (141); the pliers rod linkage assembly (3) is connected to the transducer (21) via a conductive assembly (4); a trigger (15) is provided on the front side of the gripping handle (1), and the trigger (15) is connected to a linkage mechanism (5) arranged in the assembly cavity (11).

2. The adaptive ultrasonic blade system with pressure judgment according to claim 1, characterized in that: The clamp rod linkage assembly (3) comprises a locking sleeve (31), one end of which is plugged with a clamping sleeve (32), and a small wave spring seat (33) and a large wave spring seat (34) are provided on the locking sleeve (31), a small wave spring (35) is provided between the small wave spring seat (33) and the large wave spring seat (34), and a large wave spring (36) is provided between the large wave spring seat (34) and the clamping sleeve (32).

3. The adaptive ultrasonic blade system with pressure judgment according to claim 2, characterized in that: A connecting rod seat (321) is provided at the front end of the clamping sleeve (32), a pressure spring is provided between the connecting rod seat (321) and the clamping sleeve (32), and a connecting hook (322) is provided at the end of the connecting rod seat (321), and the connecting hook (322) is clamped in the linkage positioning hole of the circumferential outer wall of the clamp rod linkage cylinder (14), and an annular film pressure sensor (323) is provided on the inner wall of the clamping sleeve (32), and one side of the annular film pressure sensor (323) is arranged to abut against the large wave spring (36).

4. The adaptive ultrasonic blade system with pressure judgment according to claim 3, characterized in that: The conductive component (4) comprises a conductive seat (41), and a current sampling electrode (42) and a voltage sampling electrode (43) are respectively arranged on the conductive seat (41); the current sampling electrode (42) is connected to the annular film pressure sensor (323) through a current sampling circuit; the voltage sampling electrode (43) is connected to the annular film pressure sensor (323) through a voltage sampling circuit; and the current sampling electrode (42) and the voltage sampling electrode (43) are both connected to the transducer (21) and transmit voltage and current data to the ultrasonic knife host (2) through the transducer (21).

5. The adaptive ultrasonic blade system with pressure determination according to claim 2, characterized in that: The linkage mechanism (5) comprises a linkage seat (51) arranged in the assembly cavity (11) and connected to the trigger (15), and a horizontal push rod (52) is provided at the upper end of the linkage seat (51), the rear end of the horizontal push rod (52) is connected to one end of the linkage seat (51) through a rotating support rod (53), and the front end of the horizontal push rod (52) is connected to the linkage seat (51) through a linkage support rod (54).

6. The adaptive ultrasonic blade system with pressure determination according to claim 5, characterized in that: The horizontal push rod (52) comprises a horizontal moving part (521), one end of the horizontal moving part (521) is provided with a connecting part (522), the upper end of the connecting part (522) is provided with an arc-shaped linkage part (523), and the arc-shaped linkage part (523) is clamped in the clamping gap between the locking sleeve (31) and the small wave spring seat (33), the inner wall of the assembly cavity (11) is provided with a stroke limit groove (524), and the horizontal part is provided with a limit connecting rod inserted in the stroke limit groove (524).

7. The adaptive ultrasonic blade system with pressure determination according to claim 4, characterized in that: The conductive seat (41) is connected to a conductive electrode (412) via a conductive line (411), and a conductive contact (413) and a connecting contact (414) are respectively provided at the upper and lower ends of the conductive electrode (412). A positioning connection seat (415) is provided in the assembly cavity (11), and the upper end of the positioning connection seat (415) is connected to a pressing conductive seat (416) via an elastic reset member, and a connecting portion (417) corresponding to the connecting contact (414) is provided on the inner wall of the positioning connection seat (415), and a conductive portion (418) corresponding to the conductive contact (413) is provided on the pressing conductive seat (416).

8. The adaptive ultrasonic blade system with pressure determination according to claim 1, characterized in that: After the trigger (15) is pulled to the bottom, during the process of pressing the movable clamp head (141), the parts with the stroke change in the clamp rod linkage cylinder (14) are: the inner tube L 内 , Small wave spring (35) L 小 , Large Wave Spring (36) L 大 , and the sum of the stroke lengths of the three components is a constant, namely L 内 +L 小 +L 大 =△L.

9. The adaptive ultrasonic blade system with pressure determination according to claim 1, characterized in that: By L 内 +L 小 +L 大 =△L to get L 内 =△L-(L 小 +L 大 ), L 内 Feedback movable clamp head (141) and ultrasonic knife rod (13) pressing angle α 瞬 ; Set the upper and lower thresholds of α, where: Upper threshold α 上 is the normal opening angle when the movable clamp head (141) is not pressed together, Lower threshold α 下 is an acceptable minimum pressing angle of the movable forceps head (141), and the wear of the tissue pad at this angle is an acceptable wear angle; When the angle α 瞬 Less than α 下 When the ultrasonic knife host (2) reduces the output power of the transducer (21).

10. The adaptive ultrasonic blade system with pressure determination according to claim 1, characterized in that: The ultrasonic knife host (2) calculates the time difference between the zero-crossing points of two adjacent current signals through the current signal, which is ΔT, the frequency f=1 / (2ΔT), the phase difference between the voltage U and the current I is θ, and the impedance Z=(U / I)*cosθ.

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