CN109646108B - Ultrasonic knife and cutting hemostasis system - Google Patents
Ultrasonic knife and cutting hemostasis system Download PDFInfo
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- CN109646108B CN109646108B CN201910124061.1A CN201910124061A CN109646108B CN 109646108 B CN109646108 B CN 109646108B CN 201910124061 A CN201910124061 A CN 201910124061A CN 109646108 B CN109646108 B CN 109646108B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00607—Coagulation and cutting with the same instrument
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00773—Sensed parameters
- A61B2018/00875—Resistance or impedance
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/1412—Blade
Abstract
The invention discloses an ultrasonic knife and a cutting hemostasis system. The ultrasonic knife comprises an ultrasonic driving unit, a transducer, a processor, a knife head, a knife body, a signal generating device and a signal acquisition device; the ultrasonic driving unit is respectively connected with the transducer and the processor, and the cutter body is respectively connected with the transducer and the cutter head; the knife body is respectively connected with the signal generating device and the signal collecting device, and the processor is respectively connected with the signal generating device and the signal collecting device. The technical scheme provided by the embodiment of the invention can accurately determine the impedance of the target biological tissue, determine the target current value or the target voltage value of the driving signal suitable for the target biological tissue under the biological impedance, and further adjust the driving signal generated by the ultrasonic driving unit so that the cutter head works in a state of high cutting efficiency and small thermal injury in real time.
Description
Technical Field
The embodiment of the invention relates to the technical field of medical instruments, in particular to an ultrasonic knife and a cutting hemostasis system.
Background
In surgical operation, the ultrasonic scalpel is widely used due to its advantages of high cutting precision, less bleeding, less thermal damage and the like.
When the ultrasonic knife is used for cutting hemostasis, if the biological impedance change of the target biological tissue can be acquired, the accurate and efficient cutting of the ultrasonic knife is facilitated. Most ultrasonic knife products on the market estimate the biological impedance of target biological tissues by detecting the heat productivity of the clamped target biological tissues. The host machine adjusts the current value or the voltage value of the driving signal output by the ultrasonic driving unit according to the change of the biological impedance of the target biological tissue.
However, the method has low sensitivity and large error, and cannot accurately reflect the biological impedance of the clamped target biological tissue, so that the host cannot adjust the driving signal output by the ultrasonic driving unit in real time, thereby reducing the operation efficiency.
Disclosure of Invention
The invention provides an ultrasonic knife and a cutting hemostasis system, which are used for accurately acquiring the impedance of target biological tissues clamped by a knife head and controlling the knife head to work in real time in a state of high cutting efficiency and small heat damage.
In a first aspect, an embodiment of the present invention provides an ultrasonic blade, including: the ultrasonic scalpel comprises an ultrasonic driving unit, a transducer, a processor, a scalpel head, a scalpel body, a signal generating device and a signal collecting device;
the ultrasonic driving unit is respectively connected with the transducer and the processor, and the cutter body is respectively connected with the transducer and the cutter head; the knife body is respectively connected with the signal generating device and the signal collecting device, and the processor is respectively connected with the signal generating device and the signal collecting device;
the processor controls the signal generating device to generate a detection signal, the detection signal is transmitted to a target biological tissue clamped by the cutter head through the cutter body and the cutter head, a feedback signal fed back by the target biological tissue is transmitted to the signal acquisition device through the cutter head and the cutter body, and the signal acquisition device sends the acquired feedback signal to the processor; the processor determines the biological impedance of the target biological tissue according to the feedback signal, determines a target current value or a target voltage value of a driving signal required to be generated by the ultrasonic driving unit according to the biological impedance of the target biological tissue, and adjusts the driving signal generated by the ultrasonic driving unit according to the target current value or the target voltage value; the transducer converts the driving signal into a mechanical signal, and the knife body drives the knife head to cut or stop bleeding of the target biological tissue under the driving of the mechanical signal.
Optionally, the tool bit comprises a first conductive clip and a second conductive clip, and the tool bit clamps the target biological tissue through the first conductive clip and the second conductive clip; the cutter body comprises a cutter bar, an inner sleeve and an outer sleeve;
the first conductive clamping piece is connected with the outer sleeve, and the second conductive clamping piece is connected with the cutter bar; the signal generating device is connected with the cutter bar, and the signal collecting device is connected with the outer sleeve;
the inner sleeve penetrates through the outer sleeve, the cutter bar penetrates through the inner sleeve, and the cutter bar is electrically insulated from the outer sleeve.
Optionally, a gasket is disposed on a surface of the first conductive clip adjacent to the second conductive clip, and the gasket is rotatably connected to the outer sleeve through a connection component.
Optionally, the second conductive clip is fixedly disposed on the knife bar or integrated with the knife bar.
Optionally, both the inner and outer surfaces of the inner sleeve are provided with an insulating layer.
Optionally, the inner sleeve is made of an insulating material.
Optionally, the surface of the connecting member is provided with a conductive layer.
Optionally, the connecting part is made of metal material.
Optionally, the ultrasonic testing device further comprises an excitation switch, the excitation switch is connected with the processor, and the excitation switch generates a starting signal after being triggered so as to instruct the processor to control the ultrasonic driving unit to generate a driving signal and control the signal generating device to generate a detection signal.
In a second aspect, embodiments of the present invention further provide a cutting hemostasis system, including: according to the ultrasonic knife, the power supply and the display device in any embodiment of the invention, the power supply is respectively connected with the ultrasonic knife and the display device;
the display device is used for displaying the biological impedance and the biological impedance change rate of the target biological tissue transmitted by the processor;
the power supply is used for supplying power to the ultrasonic knife and the display device.
The ultrasonic scalpel provided by the embodiment of the invention obtains the target current value or the target voltage value of the driving signal suitable for the target biological tissue under the biological impedance by calculating the biological impedance of the target biological tissue in real time, and then adjusts the driving signal generated by the cutter driving module, so that the cutter works in real time in a state of high cutting efficiency and small thermal damage, the problem of low cutting efficiency caused by the fact that the impedance of the target biological tissue cannot be accurately calculated in the prior art is solved, and the effects of high cutting efficiency and small thermal damage are achieved.
Drawings
FIG. 1 is a block diagram of an ultrasonic blade according to an embodiment of the present invention;
FIG. 2 is a graph of cutting efficiency versus current for an ultrasonic blade according to an embodiment of the present invention;
FIG. 3 is a schematic view of a tool tip provided in accordance with an embodiment of the invention;
FIG. 4 is a schematic view of a cutting head and blade according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a cutting hemostasis system provided by an embodiment of the invention;
fig. 6 is a schematic structural diagram of another cutting hemostasis system provided by the embodiment of the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a block diagram of an ultrasonic blade according to an embodiment of the present invention. Referring to fig. 1, the ultrasonic blade includes: the ultrasonic scalpel comprises an ultrasonic driving unit 6, a transducer 7, a processor 5, a scalpel head 1, a scalpel body 2, a signal generating device 4 and a signal collecting device 3, wherein the ultrasonic driving unit 6 is respectively connected with the transducer 7 and the processor 5, and the scalpel body 2 is respectively connected with the transducer 7 and the scalpel head 1; the knife body 2 is respectively connected with the signal generating device 4 and the signal collecting device 3, and the processor 5 is respectively connected with the signal generating device 4 and the signal collecting device 3.
The processor 5 controls the signal generating device 4 to generate a detection signal, the detection signal is transmitted to a target biological tissue clamped by the cutter head 1 through the cutter body 2 and the cutter head 1, a feedback signal fed back by the target biological tissue is transmitted to the signal acquisition device 3 through the cutter head 1 and the cutter body 2, and the signal acquisition device 3 sends the acquired feedback signal to the processor 5; the processor 5 determines the biological impedance of the target biological tissue according to the feedback signal, determines a target current value or a target voltage value of a driving signal required to be generated by the ultrasonic driving unit 6 according to the biological impedance of the target biological tissue, and adjusts the driving signal generated by the ultrasonic driving unit 6 according to the target current value or the target voltage value; the transducer 7 converts the driving signal into a mechanical signal, and the knife body 2 drives the knife head 1 to cut or stop bleeding of the target biological tissue under the driving of the mechanical signal.
The ultrasonic knife is divided into a constant current type and a constant voltage type according to the type of a driving signal output by the ultrasonic driving unit. Fig. 2 is a graph of cutting efficiency versus current characteristic of an ultrasonic blade according to an embodiment of the present invention. Taking a constant current source type ultrasonic knife as an example, when the biological impedance of the target biological tissue is a resistor R, the relationship between the current value of the driving signal generated by the ultrasonic driving unit and the cutting efficiency of the blade head on the target biological tissue is as shown in fig. 2, the larger the current value of the driving signal generated by the ultrasonic driving unit, the larger the amplitude of the blade head, the higher the cutting speed, i.e. the cutting efficiency, but when the current value of the driving signal reaches a certain current value I1Then, as the current value of the driving signal increases, the cutting efficiency of the cutter head increases slowly, that is, the current value of the driving signal continues to increase, so that the cutting efficiency cannot be increased obviously, and the cutter head generates heat to cause larger thermal damage to the target biological tissue. Therefore, when the current value of the driving signal is I1The ultrasonic knife has high cutting efficiency and small heat damage, and the current value I1I.e. the target current value. It will be understood that the driving signal is typically an ac signal, and the current value of the driving signal is referred to as the effective value. The specific meaning of the target voltage value is similar to that of the target current value, and is not described herein again.
Specifically, the specific way of determining the target current value or the target voltage value of the driving signal required to be generated by the ultrasonic driving unit according to the biological impedance of the target biological tissue may be: and inquiring a biological tissue database according to the biological impedance of the target biological tissue to determine a target current value or a target voltage value of the driving signal required by the target biological tissue. In order to establish a biological tissue database, a large number of cutting hemostasis experiments are required to be carried out on different types of biological tissues to obtain each type of biological tissue, and when the biological impedances of parts supported by the cutter head are different, target current values and target voltage values corresponding to the different biological impedances are different, so that the biological tissue database is established. It can be understood that, in the process of cutting the target biological tissue held by the cutter head, the biological impedance of the target biological tissue changes in real time as the target biological tissue is continuously cut, so that a target current value or a target voltage value of a driving signal required to be generated by the ultrasonic driving unit needs to be determined in real time, and then the current value or the voltage value of the driving signal generated by the ultrasonic driving unit is adjusted to the target current value or the target voltage value in real time, so that the cutter head works in a state of high cutting efficiency and small thermal damage in real time.
The ultrasonic scalpel provided by the embodiment of the invention obtains the target current value or the target voltage value of the driving signal suitable for the target biological tissue under the biological impedance by calculating the biological impedance of the target biological tissue in real time, and then adjusts the driving signal generated by the cutter driving module, so that the cutter works in real time in a state of high cutting efficiency and small thermal damage, the problem of low cutting efficiency caused by the fact that the impedance of the target biological tissue cannot be accurately calculated in the prior art is solved, and the effects of high cutting efficiency and small thermal damage are achieved.
There are various specific methods for arranging the cutting head and the cutting blade in the above technical solutions, and a detailed description will be given below with reference to typical examples, but the present application is not limited thereto.
Fig. 3 is a schematic structural diagram of a cutter head according to an embodiment of the present invention. Fig. 4 is a schematic structural diagram of a cutter head and a cutter body according to an embodiment of the invention. Referring to fig. 3 and 4, the cutting head 1 includes a first conductive clip 11 and a second conductive clip 12, and the cutting head 1 clamps the target biological tissue through the first conductive clip 11 and the second conductive clip 12; the blade comprises a cutter bar 23, an inner sleeve 22 and an outer sleeve 21; the first conductive clamping piece 11 is connected with the outer sleeve 21, and the second conductive clamping piece 12 is connected with the cutter bar 23; the signal generating device is connected with the cutter bar 23, and the signal collecting device is connected with the outer sleeve 21; the inner sleeve 22 is arranged in the outer sleeve 21 in a penetrating way, the cutter bar 23 is arranged in the inner sleeve 22 in a penetrating way, and the cutter bar 23 is electrically insulated from the outer sleeve 21.
With continued reference to fig. 3 and 4, optionally, the surface of the first conductive clip 11 adjacent to the second conductive clip 12 is provided with a gasket 111, and the gasket 111 is rotatably connected to the outer sleeve 21 by a connecting member. The first conductive clip and the second conductive clip are made of metal, and have high hardness, and the gasket 111 is provided to prevent mechanical damage due to hard collision between the first conductive clip and the second conductive clip when the target biological tissue is cut. Optionally, the gasket 111 is made of conductive teflon, which has good biocompatibility and good high temperature resistance.
Optionally, the second conductive clip 12 is fixedly disposed on the knife bar 23. Optionally, the second conductive clip 12 and the tool bar 23 are integrated into a whole, so that the second conductive clip 12 and the tool bar 23 can be integrally formed, thereby reducing the manufacturing process. The surface of the second conductive clip 12 close to the first conductive clip 11 is a cutting surface for cutting or hemostasis operation of the target biological tissue.
The loop formed by the current for detecting the target biological tissue is as follows: the processor controls the signal generating device to generate a detection signal, the detection signal generated by the signal generating device is transmitted to the second conductive clamping piece 12 through the cutter bar 23 and then transmitted to a target biological tissue held by the cutter head 1, the detection signal changes after passing through the target biological tissue to obtain a feedback signal, the feedback signal is transmitted to the outer sleeve 21 through the gasket 111 of the first conductive clamping piece 11 and the connecting part, and finally the signal collecting device transmits the collected feedback signal to the processor. Specifically, the detection signal is an alternating current signal, on one hand, the alternating current signal has good anti-interference capability, on the other hand, the biological impedance of the target biological tissue is usually complex impedance, the alternating current signal is subjected to phase shift after passing through the target biological tissue, the biological impedance type of the target biological tissue can be judged according to the voltage advance or current advance condition of the alternating current signal after passing through the target biological tissue, and when the voltage advance occurs, the biological impedance type of the target biological tissue is inductive impedance; when the current is advanced, the bio-impedance type of the target biological tissue is a capacitive impedance. In addition, the equivalent current of the detection signal is small, so that the target biological tissue is prevented from being damaged when the detection signal flows through the target biological tissue.
On the basis of the above technical solution, optionally, both the inner surface and the outer surface of the inner sleeve 22 are provided with an insulating layer. Illustratively, the inner and outer surfaces of the inner sleeve 22 are spray coated with an insulating coating of polytetrafluoroethylene. Optionally, an insulating material is used for the inner sleeve 22. This arrangement prevents the knife bar 23 and the outer sleeve 21 from causing short-circuiting during operation.
Optionally, the surface of the connecting member is provided with a conductive layer. Optionally, the outer sleeve 21 is of a metallic material. Illustratively, the connecting part is a pin, through holes with the same diameter are formed in the pad 111 and the first conductive clip 11, the pin passes through the through holes to rotatably connect the pad 111, the first conductive clip 11 and the outer sleeve 21, and gold plating is applied to the pin, the inner surface of the through hole in the pad 111 and the inner surface of the through hole in the first conductive clip 11 to enhance the electrical contact performance and reduce the contact resistance. The outer sleeve 21 is made of a copper alloy having excellent electrical conductivity. Optionally, the connecting part is made of metal material. By the arrangement, the conductivity can be enhanced, the loss of a feedback signal fed back by the target biological tissue in the transmission process is minimized, and the calculation precision of the biological impedance of the target biological tissue is improved.
Optionally, the ultrasonic scalpel further comprises an excitation switch, the excitation switch is connected with the processor, and the excitation switch generates a starting signal after being triggered so as to instruct the processor to control the ultrasonic driving unit to generate a driving signal and control the signal generating device to generate a detection signal.
Fig. 5 is a schematic structural diagram of a cutting hemostasis system provided by an embodiment of the invention. Referring to fig. 5, the system includes: the ultrasonic scalpel 110, the power supply 120 and the display device 130 according to any embodiment of the present invention, the power supply 120 is connected to the ultrasonic scalpel 110 and the display device 130 respectively; the display device 130 is used for displaying the biological impedance and the biological impedance change rate of the target biological tissue transmitted by the processor; the power supply 120 is used to supply power to the ultrasonic blade 110 and the display device 130.
The cutting hemostasis system comprises any one of the cutting knives, so that the cutting hemostasis system has corresponding functions and beneficial effects.
Illustratively, the display device 130 includes a liquid crystal display, and an impedance characteristic diagram of the target biological tissue is plotted through the liquid crystal display, wherein a horizontal axis of the impedance characteristic diagram is labeled as time and a vertical axis is labeled as biological impedance.
The biological tissue cutting device comprises a cutting head, a cutting head and a cutting head, wherein the cutting head is used for clamping a target biological tissue, the temperature of the cutting head is higher in the initial cutting stage, moisture in the target biological tissue can be evaporated in a short time, the electric conductivity of the target biological tissue can be reduced, namely, the biological impedance is increased, and then the target biological tissue is cut and thinned, and the biological impedance is smaller and smaller, so that the biological impedance of the target biological tissue is increased and then decreased in the cutting process. Therefore, the impedance characteristic diagram of the target biological tissue is drawn in real time, so that a surgeon can better grasp the current cutting degree of the target biological tissue by observing the impedance characteristic diagram in an environment with an inconvenient visual field. In addition, because the biological impedance of different types of biological tissues is greatly different, when the biological impedance characteristic diagram shows that the biological impedance is changed drastically at a certain time, a surgeon can know that other types of biological tissues are cut currently according to the biological impedance characteristic diagram, namely, cutting by mistake is required to be stopped, so that the operation risk is reduced.
It can be understood that the liquid crystal display may also be used to display information such as the complex impedance type of the target biological tissue, and in addition, if the liquid crystal display has a touch function, the liquid crystal display may have an input and output function, so that a user may perform a human-computer interaction with the processor through the liquid crystal display.
Fig. 6 is a schematic structural diagram of another cutting hemostasis system provided by the embodiment of the invention. Referring to fig. 6, the system comprises a cutter body 20 and a main machine 10, wherein the processor comprises a first processor and a second processor, and the first processor is respectively connected with a signal generating device, a signal acquiring device and the second processor; the second processor is connected with the ultrasonic driving unit; the cutter head, the cutter body, the signal generating device, the signal acquisition device, the transducer and the first processor are integrated on the cutter body 20; the second processor, the ultrasonic driving unit, the power supply, and the display device are integrated on the host computer 10.
The division of the first processor and the second processor is as follows: the first processor controls the signal generating device to generate a detection signal, the detection signal is transmitted to a target biological tissue clamped by the cutter head through the cutter body and the cutter head, a feedback signal fed back by the target biological tissue is transmitted to the signal acquisition device through the cutter head and the cutter body, the signal acquisition device transmits the acquired feedback signal to the first processor, the first processor determines the biological impedance of the target biological tissue according to the feedback signal, and transmits the biological impedance of the target biological tissue to the second processor. The second processor determines a target current value or a target voltage value of a driving signal required to be generated by the ultrasonic driving unit according to the biological impedance of the target biological tissue, and adjusts the driving signal generated by the ultrasonic driving unit according to the target current value or the target voltage value.
It should be noted that the feedback signal acquired by the signal acquisition device is usually an analog signal, the interference rejection of the analog signal is poor, and if the feedback signal is directly transmitted to the second processor through the cable and the second processor calculates the bio-impedance of the target biological tissue according to the feedback signal, the feedback signal is easily interfered during the transmission process due to the long cable, so that the calculation error of the bio-impedance is relatively large. However, by arranging the first processor in the ultrasonic blade, calculating the bio-impedance of the target biological tissue by the first processor, and transmitting the calculation result to the second processor in the form of a digital signal, the error of the bio-impedance of the target biological tissue finally obtained by the second processor is small due to the short transmission distance required by the feedback signal and the strong anti-interference capability of the digital signal, which is beneficial to accurately judging the target current value or the target voltage value.
Optionally, the first processor and the second processor communicate with each other through a cable;
or the ultrasonic blade 10 further includes a first communication module, and the host 20 further includes a second communication module, and the first processor and the second processor communicate with each other through the first communication module and the second communication module.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (10)
1. An ultrasonic knife is characterized by comprising an ultrasonic driving unit, a transducer, a processor, a knife head, a knife body, a signal generating device and a signal acquisition device;
the ultrasonic driving unit is respectively connected with the transducer and the processor, and the cutter body is respectively connected with the transducer and the cutter head; the cutter body is respectively connected with the signal generating device and the signal collecting device, and the processor is respectively connected with the signal generating device and the signal collecting device;
the processor controls the signal generating device to generate a detection signal, the detection signal is transmitted to a target biological tissue clamped by the cutter head through the cutter body and the cutter head, a feedback signal fed back by the target biological tissue is transmitted to the signal acquisition device through the cutter head and the cutter body, and the signal acquisition device sends the acquired feedback signal to the processor; the processor determines the biological impedance of the target biological tissue according to the feedback signal, determines a target current value or a target voltage value of a driving signal required to be generated by the ultrasonic driving unit according to the biological impedance of the target biological tissue, and adjusts the driving signal generated by the ultrasonic driving unit according to the target current value or the target voltage value; the transducer converts the driving signal into a mechanical signal, and the knife body drives the knife head to cut or stop bleeding of the target biological tissue under the driving of the mechanical signal;
the determining, by the processor, a target current value or a target voltage value of a driving signal that needs to be generated by the ultrasound driving unit according to the bio-impedance of the target biological tissue specifically includes: the processor queries a biological tissue database according to the biological impedance of the target biological tissue to determine a target current value or a target voltage value of a driving signal required by the target biological tissue;
the ultrasonic knife is a constant current type ultrasonic knife, and when the current value of the driving signal is the target current value, the cutting efficiency of the ultrasonic knife is highest, and the thermal damage is smallest; or the ultrasonic knife is a constant voltage type ultrasonic knife, and when the voltage value of the driving signal is the target voltage value, the cutting efficiency of the ultrasonic knife is highest, and the thermal damage is smallest; and;
the detection signal comprises an alternating current signal, the alternating current signal is subjected to phase shift after passing through the target biological tissue, and when the voltage is advanced, the type of the biological impedance of the target biological tissue is inductive impedance; when the current is advanced, the bio-impedance type of the target biological tissue is a capacitive impedance.
2. The ultrasonic blade of claim 1, wherein the cutting head comprises a first conductive jaw and a second conductive jaw, the cutting head clamping the target biological tissue via the first conductive jaw and the second conductive jaw; the knife body comprises a knife bar, an inner sleeve and an outer sleeve;
the first conductive clamping piece is connected with the outer sleeve, and the second conductive clamping piece is connected with the cutter bar; the signal generating device is connected with the cutter bar, and the signal collecting device is connected with the outer sleeve;
the inner sleeve penetrates through the outer sleeve, the cutter bar penetrates through the inner sleeve, and the cutter bar is electrically insulated from the outer sleeve.
3. The ultrasonic blade of claim 2, wherein a surface of the first conductive clip adjacent to the second conductive clip is provided with a shim that is rotatably coupled to the outer sleeve by a coupling member.
4. The ultrasonic blade of claim 2, wherein the second conductive clip is fixedly disposed on the blade bar or the second conductive clip is integrated with the blade bar.
5. The ultrasonic blade of claim 2, wherein both the inner and outer surfaces of the inner sleeve are provided with an insulating layer.
6. The ultrasonic blade of claim 2, wherein the inner sleeve is an insulating material.
7. The ultrasonic blade of claim 3, wherein a surface of the connecting member is provided with a conductive layer.
8. The ultrasonic blade of claim 3, wherein the connecting member is made of a metal material.
9. The ultrasonic blade of claim 1, further comprising an activation switch coupled to the processor, the activation switch generating an activation signal upon activation to instruct the processor to control the ultrasonic drive unit to generate a drive signal and to control the signal generating device to generate a detection signal.
10. A cutting hemostasis system, comprising the ultrasonic blade of any one of claims 1-9, a power supply and a display device, wherein the power supply is connected to the ultrasonic blade and the display device, respectively;
the display device is used for displaying the biological impedance and the biological impedance change rate of the target biological tissue sent by the processor;
the power supply is used for supplying power to the ultrasonic knife and the display device.
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| CN109646109B (en) * | 2019-02-19 | 2021-04-13 | 深圳市世格赛思医疗科技有限公司 | Self-adaptive cutting hemostasis control method and device for ultrasonic knife tissue |
| CN111513848B (en) * | 2020-04-28 | 2022-03-29 | 绍兴梅奥心磁医疗科技有限公司 | Method and device for individually setting working magnetic field intensity and magnetic navigation system |
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