CN215606098U

CN215606098U - Ultrasonic cutting hemostatic knife system

Info

Publication number: CN215606098U
Application number: CN202121483680.9U
Authority: CN
Inventors: 陈广锞; 陈伟彬
Original assignee: Shenzhen Chengchuan Medical Co ltd
Current assignee: Shenzhen Chengchuan Medical Co ltd
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2022-01-25
Anticipated expiration: 2031-07-01

Abstract

The utility model provides an ultrasonic cutting hemostatic knife system, which comprises a host machine, an ultrasonic transducer handle and an ultrasonic cutting hemostatic knife, wherein the host machine is internally provided with an ultrasonic driving module and a controller, the ultrasonic transducer handle converts electric energy into mechanical vibration energy, and the ultrasonic cutting hemostatic knife is used for cutting or stopping bleeding of tissues, when the ultrasonic cutting hemostatic knife is used for cutting different tissues, the controller is used for adjusting the frequency and the equivalent current of an excitation electric signal output by the ultrasonic driving module according to power feedback and frequency feedback, so that the ultrasonic transducer handle is always operated under the states of resonant frequency and set constant current value, the ultrasonic cutting hemostatic knife can achieve the same amplitude when cutting different tissues at set energy gears, the self-adaptive adjustment of the frequency and the power of the ultrasonic cutting hemostatic knife system is realized, the amplitude is prevented from being reduced or increased in the operation process, and the tissues are cut or stopped at the expected efficiency, thereby shortening the operation time and improving the operation safety.

Description

Ultrasonic cutting hemostatic knife system

Technical Field

The utility model belongs to the field of medical instruments, and particularly relates to an ultrasonic cutting hemostatic knife system.

Background

The ultrasonic scalpel has the characteristics of rapid hemostasis and small thermal injury, and is widely applied to various thoracic and abdominal cavity surgical operations, particularly minimally invasive operations.

In the technical field of ultrasonic cutting hemostatic knives, a system is generally composed of an ultrasonic driving power supply, an ultrasonic transducer handle and an ultrasonic cutting hemostatic knife, and the system is required to be in a resonance state all the time in the working process so as to realize energy conversion and ultrasonic vibration output with maximum efficiency. However, in the actual surgical process, the state and type of the tissue for ultrasonic cutting hemostasis are constantly changed, so that the load impedance of the system is changed, the working frequency of the system is deviated and is not in a resonance state, and the efficiency of converting electric energy into ultrasonic vibration energy is low; or the output power of the system is insufficient or overhigh, the output amplitude is overhigh or overlow, the tissue cutting hemostasis efficiency is low or the thermal injury is serious, and the efficiency and the safety of the operation are affected.

Aiming at the defects in the prior art, an ultrasonic cutting hemostatic scalpel system capable of adjusting frequency and power in real time is urgently needed to be designed to adapt to the situation that when an ultrasonic scalpel cuts different tissues, the efficiency and safety of the ultrasonic scalpel can reach the expectation, so that the operation time is shortened, and the operation quality is improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide an ultrasonic cutting hemostatic knife system with self-adaptive adjustment of frequency and power, which shortens the operation time and improves the operation quality.

The utility model is thus realized, an ultrasonic cutting hemostatic knife system comprising:

the ultrasonic drive module is used for outputting an excitation signal, and the controller is used for adjusting the frequency and the equivalent current of the excitation signal output by the ultrasonic drive module according to power feedback and frequency feedback;

the ultrasonic cutting hemostatic knife is used for cutting or stanching tissues;

the ultrasonic transducer handle is used for converting the electric energy of the excitation signal output by the ultrasonic driving module into mechanical energy so as to control the ultrasonic cutting hemostatic knife to perform mechanical vibration, so that the tissue is cut or hemostatic;

when the ultrasonic cutting hemostatic knife cuts different tissues, the controller adjusts the frequency and the equivalent current of the excitation signal output by the ultrasonic driving module according to the power feedback and the frequency feedback, so that the ultrasonic transducer handle always operates in a state of a resonant frequency and a set constant current value, the ultrasonic cutting hemostatic knife works at the resonant frequency when cutting different tissues, and the ultrasonic cutting hemostatic knife can achieve the same amplitude when cutting different tissues at a set energy gear.

Specifically, the ultrasonic drive module includes:

a waveform generator for emitting a sine wave signal;

and the transformer is used for amplifying the sine wave signal output by the waveform generator and driving the handle of the ultrasonic transducer.

The first signal acquisition and processing circuit module is used for converting the sine wave signal into a phase square wave signal of voltage and current;

the phase conversion circuit module is used for converting the phase square wave signals of the voltage and the current into voltage and current phase difference square wave signals;

the controller converts the acquired voltage and current phase difference square wave signals into phase difference values and compares and analyzes the phase difference values with prestored phase difference values to adjust sine wave signals sent by the waveform generator, so that the voltage of the sine wave electrical signals is the same as the phase of the current when the ultrasonic transducer handle works, and the ultrasonic transducer handle works at a resonant frequency.

Specifically, the waveform generator includes:

the waveform generating unit is used for outputting two paths of sine waves with the same frequency, the same amplitude and complementation;

the waveform amplification following unit is used for amplifying the sine wave signals in proportion and improving the load capacity so as to enhance the anti-interference capacity;

and the waveform driving unit is used for controlling the primary current of the transformer.

Specifically, the first signal acquisition processing circuit module includes:

the first current signal acquisition module is used for acquiring a current signal of the handle of the ultrasonic transducer;

the first voltage signal acquisition module is used for acquiring a voltage signal of the handle of the ultrasonic transducer;

the first current signal processing module is used for processing the current signal data acquired by the first current signal acquisition module and converting a sine wave signal output by the waveform generator into a square wave signal;

and the first voltage signal processing module is used for processing the voltage signal data acquired by the first voltage signal acquisition module and converting the sine wave signal output by the waveform generator into a square wave signal.

Specifically, the phase conversion circuit module includes:

the exclusive-OR gate can input two levels, when the two input levels are different, a high level 1 is output, and when the two input levels are the same, a low level 0 is output;

and the current-limiting voltage stabilizing unit is connected with the exclusive-OR gate and is used for current-limiting and stabilizing the level output by the exclusive-OR gate so as to enable the controller to receive and process the level.

Further, the ultrasonic driving module further comprises:

the voltage regulating module is used for regulating the voltage input to the transformer, and the transformer outputs the regulated driving voltage through mutual inductance;

the second signal acquisition processing circuit module is used for converting acquired voltage signals and current signals of the ultrasonic load into digital signals and feeding the digital signals back to the controller;

the controller is used for monitoring the ultrasonic cutting hemostatic knife in real time according to the voltage and current signals output by the second signal acquisition and processing module, when the current signals change due to the change of the ultrasonic cutting hemostatic knife, the controller controls the voltage adjusting module to adjust the output voltage, and meanwhile, the driving control module controls the primary current of the transformer according to the waveform driving signals input by the waveform generator, so that the primary input voltage of the transformer is adjusted.

Specifically, the voltage regulation module includes:

an output unit for outputting the regulated voltage;

the first driving unit drives the output unit according to the PWM driving signal output by the controller;

and the feedback unit is used for feeding the voltage signal output by the output unit back to the controller, and the controller adjusts the duty ratio of the PWM driving signal input into the first driving unit according to the voltage signal fed by the feedback unit so as to adjust the voltage output by the output unit.

Specifically, the output unit includes:

the first upper bridge MOS tube has the functions of conduction and closing;

the first lower bridge MOS tube has the functions of conduction and closing;

and the energy storage unit is respectively connected with the first upper bridge MOS tube and the first lower bridge MOS tube and used for charging and discharging.

Specifically, the ultrasonic cutting hemostatic scalpel system further comprises a display screen for providing display and control functions of the ultrasonic cutting hemostatic scalpel system for a user, and a human-computer interaction interface for human-computer interaction with the controller is displayed.

The ultrasonic cutting hemostatic knife system further comprises a foot controller connected with the controller in a wired and/or wireless mode, and the foot controller is used for enabling the controller to execute control instructions of the foot controller.

Specifically, the ultrasonic cutting hemostatic scalpel comprises a push-pull tube, a tool bit, a chuck and a manual trigger assembly, wherein the tool bit is arranged in the push-pull tube in a penetrating mode and driven by the ultrasonic transducer handle, the chuck is respectively arranged at two ends of the push-pull tube, the manual trigger assembly has a moment lever amplification effect, when the manual trigger assembly is held, touch pressure is transmitted to the push-pull tube through a spring structure to generate pulling force, so that the chuck moves towards the tool bit and generates a large and stable clamping force to clamp tissues, and the ultrasonic transducer handle drives the tool bit to mechanically vibrate to cut the tissues.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a block diagram of an ultrasonic cutting hemostatic blade system provided by an embodiment of the present invention.

Fig. 2 is a structural diagram of a first current signal acquisition module and a first voltage signal acquisition module in an ultrasonic cutting hemostatic knife system according to an embodiment of the present invention.

Fig. 3 is a structural diagram of a first current signal processing module and a first voltage signal processing module in an ultrasonic cutting hemostatic knife system according to an embodiment of the present invention.

Fig. 4 is a structural diagram of a voltage regulation module in an ultrasonic cutting hemostatic knife system according to an embodiment of the present invention.

FIG. 5 is a block diagram of a waveform generator in an ultrasonic cutting hemostatic blade system according to an embodiment of the present invention.

Fig. 6 is a structural diagram of a waveform amplification following unit in the ultrasonic cutting hemostatic knife system provided by the embodiment of the utility model.

Fig. 7 is a structural diagram of a waveform driving unit in an ultrasonic cutting hemostatic knife system according to an embodiment of the present invention.

Fig. 8 is a structural diagram of a second signal acquisition and processing circuit module in the ultrasonic cutting hemostatic knife system according to the embodiment of the utility model.

Fig. 9 is a perspective view of an ultrasonic cutting hemostatic knife system provided by an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second", "third", "fourth", and "fifth", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, an ultrasonic cutting hemostatic knife system according to an embodiment of the present invention includes:

the system comprises a host 100, a controller 1 and a control module, wherein the host 100 is internally provided with an ultrasonic driving module for outputting an excitation signal and the controller 1 electrically connected with the ultrasonic driving module, the controller 1 adjusts the frequency and the equivalent current of the excitation signal output by the ultrasonic driving module according to power feedback and frequency feedback, and the excitation signal is a sine wave signal in the embodiment;

an ultrasonic cutting hemostatic blade 200 for cutting or stopping bleeding of tissue;

the ultrasonic transducer handle 300 is used for converting the electric energy of the excitation signal output by the ultrasonic driving module into mechanical energy so as to control the ultrasonic cutting hemostatic knife 200 to perform mechanical vibration, thereby cutting or stanching tissues;

when the ultrasonic cutting hemostatic scalpel 200 cuts different tissues, the controller 1 adjusts the frequency and the equivalent current of the excitation signal output by the ultrasonic driving module according to the power feedback and the frequency feedback, so that the ultrasonic transducer handle 300 always operates in a state of a resonant frequency and a set constant current value, the ultrasonic cutting hemostatic scalpel 200 can work at the resonant frequency when cutting different tissues, the ultrasonic cutting hemostatic scalpel 200 can achieve the same amplitude when cutting different tissues at a set energy gear, and the ultrasonic cutting hemostatic scalpel system can achieve self-adaptive adjustment of the frequency and the power.

Specifically, the ultrasonic drive module includes:

the waveform generator 2 is connected with the controller and used for sending out sine wave signals;

and the transformer is connected with the output end of the waveform generator 2 and used for amplifying the sine wave signal output by the waveform generator 2 and driving the handle of the ultrasonic transducer.

The first signal acquisition processing circuit module 3 is connected with the output end of the transformer and used for converting the sine wave signal output by the transformer into a phase square wave signal of voltage and current;

the input end of the phase conversion circuit module 4 is connected with the output end of the first signal acquisition and processing circuit module 3, and the output end of the phase conversion circuit module is connected with the input end of the controller, and is used for converting the phase square wave signals of voltage and current into voltage and current phase difference square wave signals;

the controller 1 converts the acquired voltage-current phase difference square wave signal into a phase difference value, and compares the phase difference value with a prestored phase difference value to adjust the sine wave signal sent by the waveform generator 2, so that the voltage of the sine wave electric signal is the same as the phase of the current when the ultrasonic transducer handle 300 works, and the ultrasonic transducer handle 300 works at the resonance frequency.

Specifically, the first signal acquisition processing circuit module 3 includes:

the first current signal acquisition module 31 is used for acquiring a current signal of the ultrasonic transducer handle 300;

the first voltage signal acquisition module 32 is used for acquiring a voltage signal of the ultrasonic transducer handle 300;

the first current signal processing module 33 is configured to process the current signal data acquired by the first current signal acquiring module 31, and convert the sine wave signal output by the waveform generator 2 into a square wave signal;

the first voltage signal processing module 34 is configured to process the voltage signal data collected by the first voltage signal collecting module 32, and convert the sine wave signal output by the waveform generator 2 into a square wave signal.

As shown in fig. 2, preferably, the first current signal collecting module 31 and the first voltage signal collecting module 32 respectively include a sampling unit 311, a first amplifying unit 312, an isolating unit 313, a filtering unit 314, and a second amplifying unit 315, which are sequentially connected in series, in this embodiment, the two sampling units 311 have different structures, and the two first amplifying units 312, the two isolating units 313, the two filtering units 314, and the two second amplifying units 315 have the same structure and similar principle.

Specifically, one of the sampling units 311 is composed of a series resistor (the series resistor is a plurality of resistors arranged in series) for stepping down the high voltage output to the anode of the ultrasonic transducer handle 300;

the other sampling unit 311 is composed of a series resistor (the series resistor is a plurality of resistors arranged in series) and is used for converting the loop current signal in the ultrasonic transducer handle 300 into a voltage signal for collection.

A first amplification unit 312 for amplifying the signal in scale;

the isolation unit 313 is a transformer, an input end of the isolation unit is connected to the first amplification unit 312, and the transformer is configured to isolate and convert the voltage signal and the current signal output by the first amplification unit 312 and transmit the voltage signal and the current signal to the post-stage filtering unit 314;

the input end of the filtering unit 314 is connected with the mutual inductor 313 and is used for filtering noise waves in the voltage signal or the current signal output by the mutual inductor;

and a second amplifying unit 315, an input end of which is connected to the filtering unit 314, wherein the second amplifying unit 315 is configured to amplify the input voltage or current proportionally, so as to avoid loss of the voltage signal or the current signal during transmission.

The first current signal collecting module 31 and the first voltage signal collecting module 32 respectively include a sampling unit 311, a first amplifying unit 312, an isolating unit 313, a filtering unit 314 and a second amplifying unit 315 which are sequentially connected in series, and the circuit structure can provide real-time and accurate voltage signals and current signals for the first current signal processing module 33 and the first voltage signal processing module 34 so as to process a phase difference between the voltage signals and the current signals and provide a basis for resonance adjustment and power adjustment of the handle of the ultrasonic transducer.

As shown in fig. 3, specifically, the first current signal processing module 33 and the first voltage signal processing module 34 respectively include:

the comparison units 331, each of the comparison units 331 includes a comparison chip (not shown) for converting a sine wave signal into a square wave signal.

An input end of the level conversion unit 332 is connected to an output end of the comparison chip of the comparison unit 331, and an output end of the level conversion unit 332 is connected to the phase conversion circuit module, and is configured to output a level that can be received by the phase conversion circuit module 4;

an amplifying unit 333, wherein the amplifying unit 333 is connected with the input end of the comparing unit 331, and is used for enhancing the driving capability of the transmission signal;

the input end of the filtering unit 334 is connected to the first current signal collecting module 31 or the first voltage signal collecting module 32, and the output end thereof is connected to the input end of the amplifying unit 333, and is configured to filter the voltage signal or the current signal input to the amplifying unit 333.

Specifically, the level shift unit 332 includes: a plurality of resistors (not shown) connected in series, each of which functions as a voltage divider for causing the level conversion unit 332 to output a level that can be received by the xor gate 41 of the phase conversion circuit module 4.

The amplifying unit 333 includes: a first follower (not shown) and an amplification unit (not shown) provided at an inverting input terminal of the first follower, the amplification unit being composed of resistors arranged in parallel.

Specifically, the filtering unit 334 is composed of a second follower (not shown) and a multiple-order filter (not shown), in this embodiment, there are two multiple-order filters, including a first-order filter and a second-order filter, and both the first-order filter and the second-order filter are composed of a resistor and a capacitor arranged in parallel and are arranged at an input end of the second follower.

As shown in fig. 3, specifically, the phase conversion circuit block 4 includes:

an exclusive or gate 41 which can input two levels, and outputs a high level 1 when the two input levels are different, and outputs a low level 0 when the two input levels are the same;

and a current-limiting and voltage-stabilizing unit 42, an input end of which is connected to the exclusive or gate 41, wherein the current-limiting and voltage-stabilizing unit 42 is used for current-limiting and stabilizing the level output by the exclusive or gate so as to enable the controller 1 to receive and process the level.

To sum up, the first current signal collecting module 31 and the first voltage signal collecting module 32 respectively include a sampling unit 311 for collecting a voltage signal and a current signal of the ultrasonic transducer handle 300, a first amplifying unit 312 connected to the sampling unit 311, an isolating unit 313 for isolating a high voltage signal or a high current signal output by the first amplifying unit 312, a filtering unit 314 for filtering noise in the isolated voltage signal or current signal, and a second amplifying unit 315 for amplifying the filtered voltage signal or current signal in proportion, so as to provide a stable voltage signal and current signal which can be received by the controller 1; so that the controller 5 detects whether the voltage signal and the current signal are in phase to provide a basis for resonance adjustment, thereby allowing the frequency of the ultrasonic transducer handle 300 to be in a normal resonance state.

As shown in fig. 1 and 4, further, the ultrasonic driving module further includes:

a voltage regulating module 5, the input end of which is connected with the controller 1 and the output end of which is connected with the primary center tap of the transformer, for regulating the voltage input to the transformer, and the transformer outputs the regulated driving voltage through mutual inductance;

the input end of the second signal acquisition processing circuit module 6 is connected with the secondary side of the transformer, the output end of the second signal acquisition processing circuit module is connected with the input end of the controller, and the output end of the transformer is connected with the ultrasonic load, so that acquired voltage signals and current signals of the ultrasonic load are converted into digital signals and fed back to the controller 1; in this embodiment, the ultrasonic load includes voltage and current signals for the operation of the ultrasonic cutting hemostasis blade 200 and the ultrasonic transducer handle 300.

In this embodiment, the second signal acquisition and processing circuit module 6 and the first signal acquisition and processing circuit module 3 are the same signal acquisition and processing circuit module.

The controller 1 collects the voltage and current signals output by the processing module 6 according to the second signal and monitors the ultrasonic load in real time, when the current signals change due to the change of the ultrasonic load, the controller 1 controls the voltage adjusting module 5 to adjust the output voltage and drives signals according to the waveform input by the waveform generator 2 to control the current passing through the primary side of the transformer, so that the input voltage of the primary side of the transformer is adjusted.

Specifically, the voltage regulation module 5 includes:

an output unit 51, an input end of which is connected to the first driving unit 52, for outputting the regulated voltage;

a first driving unit 52, the input end of which is connected to the controller 1, and which drives the output unit according to the PWM driving signal output by the controller 1;

and a feedback unit 53, an input end of which is connected with the output unit 51, for feeding back the voltage signal output by the output unit 51 to the controller 1, wherein the controller 1 adjusts the duty ratio of the PWM driving signal input to the first driving unit 52 according to the voltage signal fed by the feedback unit, thereby adjusting the voltage output by the output unit 51.

Specifically, the output unit 51 includes:

the first upper bridge MOS tube has the functions of conduction and closing;

the first lower bridge MOS tube has the functions of conduction and closing;

the first upper bridge MOS transistor and the second upper bridge MOS transistor are connected in parallel, and input ends of the first upper bridge MOS transistor and the second upper bridge MOS transistor are respectively connected with an output end of the first driving unit 52.

The input end of the energy storage unit 511 is connected to the first upper bridge MOS transistor and the first lower bridge MOS transistor respectively for charging and discharging.

And an input end of the protection absorption unit 512 is connected to an upper bridge MOS transistor and a first lower bridge MOS transistor respectively, and is configured to filter a voltage spike generated during a switching-on or switching-off process of the first upper bridge MOS transistor and the first lower bridge MOS transistor.

Specifically, the first driving unit 52 further includes:

the input end of the first driving chip 521 is directly or indirectly connected with the output end of the controller 1, and is used for converting one path of PWM driving signal input by the controller 1 into two complementary high-level PWM driving signals and low-level PWM driving signals; the first driving chip 521 is an existing chip and is not described in detail.

The input end of the second driver chip 522 is connected to the output end of the first driver chip 521, and the output end of the second driver chip is directly or indirectly connected to the first upper bridge MOS transistor and the first lower bridge MOS transistor respectively, so as to receive the two PWM driving signals output by the first driver chip 521 and drive the on/off time of the first upper bridge MOS transistor and the first lower bridge MOS transistor respectively, thereby changing the charging/discharging time of the energy storage unit 511, and further adjusting the voltage output by the energy storage unit 511;

an input end of the discharge unit 523 is connected to an output end of the second driving chip 522, output ends of the discharge unit 523 are respectively connected to a gate of the first upper bridge MOS transistor and a gate of the first lower bridge MOS transistor, and the discharge unit 523 can respectively and rapidly turn off the first upper bridge MOS transistor or the first lower bridge MOS transistor.

Further, the first driving unit 52 further includes a first filtering unit 524 for filtering one path of PWM driving signal input by the controller 1, and a second filtering unit 525 for filtering two paths of PWM driving signal output by the first driving chip.

Specifically, the discharge unit 523 includes: a first discharge cell and a second discharge cell;

the first discharge unit is used for rapidly switching off the first upper bridge MOS tube;

the second discharge unit is used for rapidly switching off the first lower bridge MOS tube;

the first discharge unit and the second discharge unit are arranged in parallel, the input ends of the first discharge unit and the second discharge unit are respectively connected with the output end of the second driving chip U2, the output end of the first discharge unit is connected with the grid electrode of the first upper bridge MOS tube, the output end of the second discharge unit is connected with the grid electrode of the first lower bridge MOS tube, when the first upper bridge MOS tube is closed, the first lower bridge MOS tube is conducted, and a 48V power supply flows to the source electrode of the first lower bridge MOS tube through the drain electrode of the first lower bridge MOS tube to supply power to the energy storage unit 511; when the first upper bridge MOS transistor is turned on, the first lower bridge MOS transistor is turned off, the electric quantity stored in the energy storage unit 511 flows to the drain electrode of the first upper bridge MOS transistor through the source electrode of the first upper bridge MOS transistor, and the drain electrode of the first upper bridge MOS transistor is connected with the input end of the energy storage unit 511, so that a loop is formed and discharge is performed.

Further, the output unit 51 further includes:

a voltage dividing unit 513 for dividing the predetermined voltage output by the energy storage unit 511 and inputting the divided voltage to the feedback unit 53;

and a third filtering unit 514 for filtering the predetermined voltage output from the energy storage unit 511 to the transformer primary 61.

The controller 1 outputs a PWM wave to control the on/off time of the first upper bridge MOS transistor or the first lower bridge MOS transistor of the output unit 51, so that the energy storage unit 511 performs charging and discharging to obtain a voltage to be output.

Specifically, the feedback unit 53 includes: at least two fourth filtering units 531 connected in series in sequence, preferably three fourth filtering units 531 in this embodiment;

each of the fourth filtering units 531 includes a follower, and the follower is used to improve the loading capacity of the feedback unit.

In this embodiment, the three followers are used to perform multi-stage filtering on the feedback voltage, so that the feedback voltage output to the controller 1 is more gentle, and the output voltage of the output unit 51 can be reflected more accurately.

As shown in fig. 1, 5 and 6, specifically, the waveform generator 2 includes:

the input end of the waveform generating unit 21 is connected with the output end of the controller 1 and is used for outputting two paths of sine waves with the same frequency, the same amplitude and complementation;

the input end of the waveform amplification following unit 22 is connected with the output end of the waveform generation unit 21 and is used for amplifying the sine wave signals in proportion and improving the load capacity so as to enhance the anti-interference capacity;

and the input end of the waveform driving unit 23 is connected with the output end of the waveform amplification following unit 22, and the output end of the waveform driving unit is connected with two primary ends of the transformer, and is used for controlling the primary current of the transformer.

The waveform generating unit 21 includes a first chip for emitting two sine waves and a second chip for setting the first chip to output sine waves with different amplitudes.

The waveform amplification following unit 22 includes a first waveform amplification following unit 221 connected to one path of sine wave and a second waveform amplification following unit 222 connected to the other path of sine wave, the first waveform amplification following unit 221 and the second waveform amplification following unit 222 respectively include a first amplifier and two second followers connected in parallel, wherein an output end of the first amplifier is connected to non-inverting input ends of the two second followers, and a first current limiting unit (not shown) for limiting current is connected between the first amplifier and the two second followers.

The input end of the first amplifier is used for being connected with the waveform generating unit 21;

the output terminals of the two second followers are respectively connected to the waveform driving unit 23 through a second current limiting unit (not shown) having a current limiting function.

In this embodiment, the first current limiting unit and the second current limiting unit are both current limiting resistors.

As shown in fig. 7, the waveform driving unit 23 includes:

the second upper bridge MOS tube is used for controlling the on-off of the current output to the primary side of the transformer, each on-time period of the upper bridge MOS tube is a time period corresponding to each positive half period of one path of input sinusoidal waveforms, and each off-time period of the upper bridge MOS tube is a time period corresponding to each negative half period of one path of input sinusoidal waveforms;

the second lower bridge MOS tube is used for controlling the on-off of the current output to the primary side of the transformer, when the second upper bridge MOS tube is conducted, the second lower bridge MOS tube is closed, when the second upper bridge MOS tube is closed, the second lower bridge MOS tube is conducted, each conducting time period of the second lower bridge MOS tube is a time period corresponding to each positive half period of the other path of input sine waveform, and each stopping time period of the second lower bridge MOS tube is a time period corresponding to each negative half period of the other path of input sine waveform; in this embodiment, the second upper bridge MOS transistor and the second lower bridge MOS transistor are connected in parallel, and output terminals of the second upper bridge MOS transistor and the second lower bridge MOS transistor are respectively connected to two primary terminals of the transformer.

The upper bridge direct current bias unit 231 is configured to adjust a static operating point of the second upper bridge MOS transistor, so that the second upper bridge MOS transistor is kept away from a cut-off state and is always in a micro-conduction state, so as to eliminate crossover distortion in a sine waveform output by the transformer;

the lower bridge dc bias unit 232 is configured to adjust a static operating point of the second lower bridge MOS transistor, so that the second lower bridge MOS transistor is kept away from a cut-off state and is always in a micro-conduction state, thereby eliminating cross-over distortion in a sinusoidal waveform output by the transformer. In this example, the upper bridge dc bias unit 231 and the lower bridge dc bias unit 232 are connected in parallel, wherein an output end of the upper bridge dc bias unit 231 is connected to an input end of the second upper bridge MOS transistor, and an output end of the lower bridge dc bias unit 232 is connected to an input end of the second lower bridge MOS transistor.

In this embodiment, the number of the second upper bridge MOS transistor and the number of the second lower bridge MOS transistor are both two.

The first waveform amplification following unit 221 is connected to the two second upper bridge MOS transistors, and the second waveform amplification following unit 222 is connected to the two second lower bridge MOS transistors.

In this embodiment, after the upper bridge dc bias unit 231 is added, the second upper bridge MOS transistor is used to control the current conduction of the primary side of the transformer, the time period of conducting the large current of the primary side of the transformer each time is the time period corresponding to each positive half cycle of one of the input sinusoidal waveforms, and the time period of conducting the small current of the primary side of the transformer each time is the time period corresponding to each negative half cycle of one of the input sinusoidal waveforms;

after the lower bridge direct current bias unit 232 is added, the second upper bridge MOS tube is used for controlling the current conduction of the primary side of the transformer, when the second upper bridge MOS tube controls the primary side of the transformer to conduct large current, the second upper bridge MOS tube controls the primary side of the transformer to conduct small current, and the time period of conducting small current each time of the primary side of the transformer is the time period corresponding to each negative half period of the other path of input sine waveform; when the primary of the transformer is controlled by the second upper bridge MOS tube to conduct a small current, the primary of the transformer is controlled by the second upper bridge MOS tube to conduct a large current, and the time period of conducting the large current each time by the primary of the transformer is the time period corresponding to each positive half period of the other path of input sinusoidal waveform.

In summary, the addition of the upper bridge dc bias unit 231 and the lower bridge dc bias unit 232 eliminates cross-over distortion in the sinusoidal waveform of the secondary output of the transformer.

Specifically, the upper bridge dc bias unit 221 and the lower bridge dc bias unit 222 respectively include:

the reference chip is used for setting bias voltage, and the input end of the reference chip is connected with a 12V power supply;

and the left amplifying unit and the right amplifying unit are used for amplifying the bias voltage set by the reference chip in proportion.

The input end of one of the left amplification unit and the right amplification unit is respectively connected with the reference chip, and the output end of the one of the left amplification unit and the right amplification unit is respectively connected with the two second upper bridge MOS tubes;

the input end of the other left amplification unit and the input end of the other right amplification unit are respectively connected with the reference chip, and the output ends of the other left amplification unit and the other right amplification unit are respectively connected with the two second lower bridge MOS tubes.

In this embodiment, the left amplification unit and the right amplification unit in the upper bridge dc bias unit 221 and the lower bridge dc bias unit 222 are configured to amplify the set bias voltage in proportion, so that the second upper bridge MOS transistor and the second lower bridge MOS transistor are respectively located in the amplification regions, and thus the peak values of the positive half period and the negative half period of the sinusoidal waveform are both located in the amplification regions of the second upper bridge MOS transistor or the second lower bridge MOS transistor, thereby avoiding the cross-over distortion of the sinusoidal waveform.

An isolation unit for isolating the ac signal output by the waveform generation unit 21 from the dc signals output by the upper bridge dc bias unit 221 and the lower bridge dc bias unit 222 is disposed between the output terminals of the upper bridge dc bias unit 231 and the lower bridge dc bias unit 232 and the waveform amplification following unit 22, respectively, and the isolation unit is an isolation capacitor in this embodiment.

As shown in fig. 8, the second signal acquisition processing circuit module 6 includes:

the input end of the second current signal acquisition module 61 is connected in parallel with the ultrasonic cutting hemostatic knife 300 and is respectively connected with the secondary side of the transformer, and is used for acquiring current signals of the ultrasonic cutting hemostatic knife 300;

and the input end of the second voltage signal acquisition module 62 is respectively connected in parallel with the second current signal acquisition module 61 and the ultrasonic cutting hemostatic knife 300, and is used for acquiring a voltage signal of the ultrasonic cutting hemostatic knife 300.

The input end of the second current signal processing module 63 is connected with the output end of the second current signal acquisition module 61, and is used for converting the current signal data acquired by the second current signal acquisition module 61 into a digital signal;

and an input end of the second voltage signal processing module 64 is connected to an output end of the second voltage signal acquisition module 62, and is configured to convert the voltage signal data acquired by the second voltage signal acquisition module 62 into a digital signal.

And an analog-to-digital converter 65, an input end of which is connected to the output ends of the second current signal processing module 63 and the second voltage signal processing module 64, respectively, and an output end of which is connected to the controller 1, for converting the current signal processed by the second current signal processing module 63 and the voltage signal processed by the second voltage signal processing module 64 into digital signals and accurately feeding back the digital signals to the controller 1.

In this embodiment, the second current signal collecting module 61 and the first current signal collecting module 31 have the same structure and are shared; the second voltage signal acquisition module 62 is identical in structure and common to the first voltage signal acquisition module 32.

Specifically, the second current signal processing module 63 and the second voltage signal processing module 64 respectively include:

a full-wave precision rectification unit 631 for converting an ac signal into a dc signal;

a third amplifying unit 632, wherein the third amplifying unit 632 is connected to the input end of the full-wave precise rectifying unit 631, and is used for enhancing the driving capability of the transmission signal;

the fourth filtering unit 633 is connected to the input end of the amplifying unit 632, and is configured to filter the voltage signal or the current signal input to the third amplifying unit 632.

Specifically, the full-wave precision rectification unit 631 includes a rectification unit 6311 and a fourth amplification unit 6312 connected to each other, the rectification unit 6311 includes a fourth amplifier (not shown), a non-inverting input terminal of the fourth amplifier is grounded, an inverting input terminal of the fourth amplifier is connected to an output terminal of the third amplification unit 632, and the inverting input terminal of the fourth amplifier is also connected to an output terminal of the fourth amplifier.

In particular, the fourth amplifying unit 6312 comprises a fifth amplifier (not shown), the non-inverting input terminal of which is grounded, wherein the output terminal of the fifth amplifier in the current signal processing module 61 is connected to the current signal input interface of the analog-to-digital converter, the output terminal of the fifth amplifier in the second voltage signal processing module 64 is connected to the voltage signal input interface of the analog-to-digital converter 65, and the inverting input terminal of the fifth amplifier is further connected to the output terminal of the fifth amplifier.

Specifically, the third amplifying unit 632 includes: a third follower (not shown) and a peripheral amplification unit (not shown), wherein the amplification unit is arranged at the input end of the third follower and is used for enabling the third follower to amplify the multiple of the voltage signal in proportion;

specifically, the fourth filtering unit 633 is composed of a fourth follower (not shown) and a multiple-order filter (not shown); the non-inverting input end of the fourth follower is connected with the current signal acquisition module 61, and the inverting input end of the fourth follower is connected with the output end of the current signal acquisition module; the multi-order filter is arranged between the non-inverting input end of the fourth follower and the current signal acquisition module 61; in this embodiment, the number of the multi-order filters is two, and the multi-order filters include a first-order filter and a second-order filter, and the first-order filter and the second-order filter are used for setting the filtering parameters of the fourth follower, so that the filtering effect is good.

As shown in fig. 1 and 9, the ultrasonic cutting hemostatic knife system further includes an excitation switch 7, a display module 8 and a power supply 9, the excitation switch 7 and the display module 8 are respectively connected with the controller 1, and the power supply 9 is respectively connected with the waveform generator 2, the controller 1 and the ultrasonic driving module.

The trigger switch 7 is used for generating an on signal, and includes a cutting button 71 and a hemostasis button 72 to instruct the controller 1 to execute the operation of controlling the ultrasonic cutting hemostasis blade 200 to cut or stop bleeding.

The display module 8 comprises a display screen which is connected with the controller 1 and has a touch function, the display screen is used for displaying a human-computer interaction interface which performs human-computer interaction with the controller 1, and the human-computer interaction interface comprises a display function and a control function which provide an ultrasonic cutting hemostatic knife system for a user.

The ultrasonic cutting hemostatic knife system further comprises a foot controller 400 connected with the controller 1, wherein the foot controller 400 is connected with the controller 1 in a wired and/or wireless manner, and is used for enabling the controller 1 to execute control instructions of the foot controller 400, and the control instructions comprise: ultrasonic hemostasis energy intensity reduction, ultrasonic hemostasis energy intensity enhancement, ultrasonic hemostasis energy output activation and ultrasonic cutting energy output activation.

The ultrasonic cutting hemostatic knife 200 comprises a push-pull tube 2001, a knife head 2002 which is arranged in the push-pull tube 2001 in a penetrating mode and driven by an ultrasonic transducer handle 300, and clamping heads 2003 and a manual trigger assembly 2004 with a moment lever amplification effect which are respectively arranged at two ends of the push-pull tube 2001, wherein when the manual trigger assembly 2004 is held, touch pressure is transmitted to the push-pull tube 2001 through a spring structure (not shown) and tensile force is generated, so that the clamping heads 2003 move towards the knife head 2002 and generate large and stable clamping force to clamp tissues, and rapid tissue cutting of the knife head 2002 is facilitated.

The utility model provides an ultrasonic cutting hemostatic knife system, which comprises a host machine 100 internally provided with an ultrasonic driving module and a controller, an ultrasonic transducer handle for converting electric energy into mechanical energy and an ultrasonic cutting hemostatic knife for cutting or stopping bleeding of tissues, wherein when the ultrasonic cutting hemostatic knife cuts different tissues, the controller adjusts the frequency and equivalent current of an excitation electric signal output by the ultrasonic driving module according to power feedback and frequency feedback, so that the ultrasonic transducer handle is always operated under the states of resonant frequency and set constant current value, the ultrasonic cutting hemostatic knife can achieve the same amplitude when cutting different tissues at set energy gear, the self-adaptive adjustment of the frequency and the power of the ultrasonic cutting hemostatic knife system is realized, the amplitude is prevented from being reduced or increased in the operation process, and the tissues are cut or stopped at the expected efficiency, thereby shortening the operation time and improving the operation safety.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model.

Claims

1. An ultrasonic cutting hemostasis blade system, comprising:

2. The ultrasonic cutting hemostatic-knife system of claim 1, wherein the ultrasonic drive module comprises:

a waveform generator for emitting a sine wave signal;

3. The ultrasonic cutting hemostatic-knife system of claim 2, wherein the waveform generator comprises:

4. The ultrasonic cutting hemostatic knife system of claim 2, wherein the first signal acquisition processing circuit module comprises:

5. The ultrasonic-cutting hemostatic-knife system of claim 2, wherein the phase-conversion circuit module comprises:

6. The ultrasonic cutting hemostatic-knife system of claim 2, wherein the ultrasonic drive module further comprises:

7. The ultrasonic cutting hemostatic-knife system of claim 6, wherein the voltage regulation module comprises:

an output unit for outputting the regulated voltage;

8. The ultrasonic cutting hemostatic-knife system of claim 7, wherein the output unit comprises:

the first upper bridge MOS tube has the functions of conduction and closing;

the first lower bridge MOS tube has the functions of conduction and closing;

9. The ultrasonic-cutting hemostatic-knife system of claim 1, further comprising a display module that provides display and control functions of the ultrasonic-cutting hemostatic-knife system for a user, for displaying a human-machine interface for human-machine interaction with the controller.

10. The ultrasonic cutting hemostatic knife system of claim 1, further comprising a foot controller connected with the controller in a wired and/or wireless manner, wherein the foot controller is used for causing the controller to execute the control instructions of the foot controller.

11. The ultrasonic cutting hemostatic knife system of claim 1, wherein the ultrasonic cutting hemostatic knife comprises a push-pull tube, a knife head inserted into the push-pull tube and driven by the ultrasonic transducer handle, and a clamping head and a manual trigger assembly with a moment lever amplification effect respectively disposed at two ends of the push-pull tube, when the manual trigger assembly is held, a contact pressure is transmitted to the push-pull tube through a spring structure and generates a pulling force, so that the clamping head moves towards the knife head and generates a large and stable clamping force to clamp tissue, and the ultrasonic transducer handle drives the knife head to mechanically vibrate to cut tissue.