CN117503282A - Ultrasonic aspirator and surgical device with same - Google Patents
Ultrasonic aspirator and surgical device with same Download PDFInfo
- Publication number
- CN117503282A CN117503282A CN202311658108.5A CN202311658108A CN117503282A CN 117503282 A CN117503282 A CN 117503282A CN 202311658108 A CN202311658108 A CN 202311658108A CN 117503282 A CN117503282 A CN 117503282A
- Authority
- CN
- China
- Prior art keywords
- electromechanical conversion
- frequency
- ultrasonic
- piezoelectric ceramic
- ultrasonic aspirator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 57
- 239000000919 ceramic Substances 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 230000002572 peristaltic effect Effects 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 21
- 210000001519 tissue Anatomy 0.000 description 18
- 230000005284 excitation Effects 0.000 description 13
- 238000001514 detection method Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000001453 impedance spectrum Methods 0.000 description 5
- 238000005457 optimization Methods 0.000 description 5
- 230000010355 oscillation Effects 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 4
- 210000005228 liver tissue Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000006378 damage Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000002980 postoperative effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 210000004872 soft tissue Anatomy 0.000 description 3
- 238000001356 surgical procedure Methods 0.000 description 3
- 238000002604 ultrasonography Methods 0.000 description 3
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 2
- WZUVPPKBWHMQCE-UHFFFAOYSA-N Haematoxylin Chemical compound C12=CC(O)=C(O)C=C2CC2(O)C1C1=CC=C(O)C(O)=C1OC2 WZUVPPKBWHMQCE-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 1
- 206010030113 Oedema Diseases 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000030833 cell death Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- YQGOJNYOYNNSMM-UHFFFAOYSA-N eosin Chemical compound [Na+].OC(=O)C1=CC=CC=C1C1=C2C=C(Br)C(=O)C(Br)=C2OC2=C(Br)C(O)=C(Br)C=C21 YQGOJNYOYNNSMM-UHFFFAOYSA-N 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000002682 general surgery Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000007443 liposuction Methods 0.000 description 1
- 210000004185 liver Anatomy 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000002271 resection Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002537 thrombolytic effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/32007—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic with suction or vacuum means
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/320068—Surgical cutting instruments using mechanical vibrations, e.g. ultrasonic
- A61B2017/320072—Working tips with special features, e.g. extending parts
Landscapes
- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Mechanical Engineering (AREA)
- Biomedical Technology (AREA)
- Dentistry (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention discloses an ultrasonic aspirator and surgical equipment with the ultrasonic aspirator, and belongs to the field of medical appliances. The invention relates to an ultrasonic aspirator, which comprises an ultrasonic transducer and a hollow working tip, wherein the ultrasonic transducer comprises an amplitude transformer and at least two electromechanical conversion parts, the amplitude transformer is positioned between the hollow working tip and the electromechanical conversion parts, the at least two electromechanical conversion parts comprise at least one first electromechanical conversion part and at least one second electromechanical conversion part, and the first electromechanical conversion part and the second electromechanical conversion part are respectively used for providing two resonant frequencies so as to enable the tip of the hollow working tip to generate double-frequency overlapped vibration.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to an ultrasonic aspirator and surgical equipment with the ultrasonic aspirator.
Background
The ultrasonic aspirator is used as a surgical instrument for removing biological soft tissues by utilizing cavitation effect and mechanical effect generated by ultrasonic vibration energy, and has the advantages of small trauma, less bleeding, tissue selective removal, strong operability and the like, and is widely applied to the surgical fields of common surgery, hepatobiliary surgery, neurosurgery and the like, such as hepatobiliary surgery, tumor resection and the like. The ultrasonic aspirator is an important component of an ultrasonic surgical instrument, and converts a high-frequency voltage signal into ultrasonic vibration energy by using the inverse piezoelectric effect, so that unnecessary damage caused by errors when a doctor performs surgical operation can be effectively reduced, and the safety of the operation is improved; meanwhile, the tissue selectivity can reduce the damage to blood vessels and the bleeding amount in the operation; the operation wound surface has no tissue burn and the like, and the postoperative recovery is fast.
The whole structure of the traditional ultrasonic aspirator comprises an ultrasonic aspirator handle, a control system and an aspiration and injection system. The ultrasonic aspirator referred to in this study is an ultrasonic aspirator handle portion that consists essentially of an ultrasonic transducer and a hollow tip. Wherein the ultrasound transducer is the core of the overall ultrasound aspirator, and the hollow tip is the critical portion for delivering ultrasound energy into the tissue. In the popularization and application of the ultrasonic technology, an ultrasonic transducer is used as a key core component of an ultrasonic equipment device and is always a research hot spot. The ultrasonic transducer is an electroacoustic conversion device responsible for converting electric energy into ultrasonic vibration mechanical energy, and mainly comprises a magnetostrictive transducer and a piezoelectric ultrasonic transducer.
However, in the use process of the existing ultrasonic aspirator, the cavitation effect is usually stable cavitation, and the operation effect is general and the efficiency is low.
Disclosure of Invention
The invention aims to overcome the defects of general operation effect and low efficiency of an ultrasonic aspirator in the using process in the prior art, and provides the ultrasonic aspirator.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the ultrasonic aspirator comprises an ultrasonic transducer and a hollow working tip, wherein the ultrasonic transducer comprises a amplitude transformer and at least two electromechanical conversion pieces, the amplitude transformer is positioned between the hollow working tip and the electromechanical conversion pieces, the at least two electromechanical conversion pieces comprise at least one first electromechanical conversion piece and at least one second electromechanical conversion piece, and the first electromechanical conversion piece and the second electromechanical conversion piece are respectively used for providing two resonant frequencies so as to enable the tip of the hollow working tip to generate double-frequency overlapped vibration.
Further, the first electromechanical conversion element is a first piezoelectric ceramic stack, and the second electromechanical conversion element is a second piezoelectric ceramic stack.
Further, the first piezoelectric ceramic stack is used for providing the resonance frequency of the second-order longitudinal vibration mode, and the second piezoelectric ceramic stack is used for providing the resonance frequency of the sixth-order longitudinal vibration mode.
Further, the working frequency of the first piezoelectric ceramic stack is 18-30 kHz, and the longitudinal vibration mode order corresponding to the working frequency of the second piezoelectric ceramic stack is an integral multiple of the longitudinal vibration mode order corresponding to the working frequency of the first piezoelectric ceramic stack.
Further, the number of the electromechanical conversion pieces is two, the two electromechanical conversion pieces are a first electromechanical conversion piece and a second electromechanical conversion piece respectively, and an intermediate connecting rod is arranged between the first electromechanical conversion piece and the second electromechanical conversion piece.
Further, the amplitude transformer is a biconical amplitude transformer, or a biconical and exponential composite amplitude transformer.
The surgical equipment comprises the ultrasonic aspirator.
Further, the peristaltic pump comprises a shell and a waterway sleeve, wherein the shell and the waterway sleeve are in sealing connection to form a containing cavity, the ultrasonic aspirator is contained in the containing cavity, and the waterway sleeve can be communicated with the peristaltic pump to realize water absorption and water passage.
Further, the ultrasonic aspirator is of a hollow structure, and the hollow structure and the waterway sleeve can be communicated with the peristaltic pump so as to realize water absorption and water passage.
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the ultrasonic aspirator comprises an ultrasonic transducer and a hollow working tip, wherein the ultrasonic transducer comprises an amplitude transformer and at least two electromechanical conversion parts, the amplitude transformer is positioned between the hollow working tip and the electromechanical conversion parts, the at least two electromechanical conversion parts comprise at least one first electromechanical conversion part and at least one second electromechanical conversion part, and the first electromechanical conversion part and the second electromechanical conversion part are respectively used for providing two resonant frequencies so as to enable the tip of the hollow working tip to generate double-frequency overlapped vibration.
Drawings
FIG. 1 is a schematic view of the structure of an ultrasonic aspirator of the present invention;
FIG. 2 is a schematic view of a medical device with an ultrasonic aspirator according to the present invention;
FIG. 3 is a schematic diagram of the dual frequency effect of the ultrasonic aspirator of the present invention;
FIG. 4 is a schematic view of the effect of the medical device of the present invention for cutting tissue;
FIG. 5 is a schematic circuit diagram of an ultrasonic aspirator of the present invention;
FIG. 6 is a schematic view of the second order longitudinal vibration of the ultrasonic aspirator of the present invention;
FIG. 7 is a schematic view of six-order longitudinal vibrations of an ultrasonic aspirator according to the present invention;
FIG. 8 is a schematic diagram of a dual-frequency superposition of second-order longitudinal vibrations and sixth-order longitudinal vibrations of an ultrasonic aspirator according to the present invention;
FIG. 9 is a high definition photograph of cut living tissue under low frequency mode single frequency excitation and double frequency superimposed excitation;
FIG. 10 is a high definition photograph of bubbles when cutting living tissue under dual frequency superimposed excitation in the present invention.
Reference numerals in the schematic drawings illustrate:
100. an ultrasonic aspirator; 110. a back cover plate; 121. a first electromechanical conversion element; 122. a second electromechanical conversion element; 130. an intermediate connecting rod; 140. a horn; 150. a hollow tip; 200. a housing; 300. a waterway sleeve.
Detailed Description
In the related art, cavitation is the effect of ultrasonic energy in a liquid environment to cause a dramatic change in the volume of microscopic bubbles (often referred to as cavitation nuclei) in the liquid, causing a series of changes in shape, oscillation, growth, shrinkage, and collapse after being subjected to certain disturbances, and causing some physical and chemical changes.
Cavitation effects can be classified into stable cavitation and inertial cavitation. In stable cavitation, the radius of the air bubble is stably oscillated in a plurality of acoustic periods, the air bubble is collapsed after a plurality of periods, the damage of the acoustic characteristics to cells is small, and the effect of stable oscillation is similar to stirring, so that the stable cavitation is one of main principles of related operations such as ultrasonic liposuction, ultrasonic thrombolysis treatment and the like. In inertial cavitation, bubbles rapidly grow in one or two acoustic cycles, then collapse violently, and are accompanied by intense shock waves and jet flows, so that emulsification and fragmentation effects are generated on tissues, and therefore, the specific gravity of the inertial cavitation in cavitation effect is improved, and further, the surgical efficiency is improved.
The present embodiment addresses the urgent need for high-end ultrasonic suction surgical instruments in clinical medical fields such as general surgery and neurosurgery, and proposes an ultrasonic suction device 100 around the important direction of improving the performance of ultrasonic suction surgical instruments, and addresses the problems of conventional rimless surgical instruments and some active surgical instruments.
Specifically, referring to fig. 1, the ultrasonic aspirator 100 of the present embodiment includes an ultrasonic transducer including a horn 140 and at least two electromechanical transducers, the horn 140 being positioned between the hollow tip 150 and the electromechanical transducers, the at least two electromechanical transducers including at least one first electromechanical transducer 121 and at least one second electromechanical transducer 122, the first electromechanical transducer 121 and the second electromechanical transducer 122 being configured to provide two resonant frequencies, respectively, to cause the tip of the hollow tip 150 to vibrate in a dual-frequency superposition.
In fig. 6, point a is the second order longitudinal vibration first node, and is also the flange location of the aspirator; the point b is one of wave crests of the second-order longitudinal vibration and is positioned at the matching surface of the amplitude transformer and the hollow working surface. In fig. 7, the point a is a first node of the sixth-order longitudinal vibration and is also the center position of the second piezoelectric ceramic stack, the point b is a second node of the sixth-order longitudinal vibration and is also the flange position of the aspirator, and the point c is one of the peaks of the sixth-order longitudinal vibration and is located at the mating surface of the horn and the hollow working chamber. In fig. 8, the point a is a first node of six-order longitudinal vibration and is also the center position of the second piezoelectric ceramic stack, the point b is a second-order sixth-order common node position and is also the flange position of the aspirator, and the point c is one of the peaks of the dual-frequency superposition and is positioned at the matching surface of the amplitude transformer and the hollow working space.
Therefore, referring to fig. 3, 6-8, compared with the existing ultrasonic aspirator 100, the ultrasonic aspirator 100 of the invention can excite two modes of resonant frequencies in the same ultrasonic transducer at the same time, and generate double-frequency superposition vibration at the total monitoring tip, so as to realize inertial cavitation effect, further enhance the erosion and emulsification efficiency of biological soft tissues, and finally achieve the purpose of improving the operation efficiency.
As a specific example of this embodiment, the first electromechanical transducer 121 is configured to provide a resonance frequency of a second-order longitudinal vibration mode, and the second electromechanical transducer 122 is configured to provide a resonance frequency of a sixth-order longitudinal vibration mode, so in this embodiment, by designing an ultrasonic transducer, two groups of electromechanical transducers are designed in the same ultrasonic transducer to provide resonance frequencies of a second-order longitudinal vibration mode and a sixth-order longitudinal vibration mode, respectively, and finally, the tip of the hollow tip 150 generates vibration in a dual-frequency superposition mode.
More specifically, the performance parameters of the ultrasonic transducer include resonant frequency, impedance characteristics, phase characteristics, output amplitude, and vibration mode. The resonant frequency is some discrete frequency at which the system is prone to vibration. In order to maximize the output power of the ultrasonic transducer, the present embodiment sets the frequency of the excitation signal equal to the resonance frequency of the ultrasonic transducer.
The impedance of the ultrasonic transducer affects the output power of the ultrasonic transducer, and in order to maximize the electroacoustic conversion efficiency of the ultrasonic transducer, the ultrasonic transducer needs to be operated at an excitation frequency with a smaller impedance. This excitation frequency is considered as the optimal excitation frequency of the ultrasonic transducer, which is equal to a certain order resonance frequency of the ultrasonic transducer. Thus, in practice, there are a plurality of discrete resonant frequency points within the selected frequency range, and the frequency of the piezoceramic stack is not directly related to the stress of the attractor, and this embodiment determines that the amplitude of the attractor is power, and the higher the power, the greater the amplitude, and the slightly smaller the resonant frequency. Meanwhile, at the resonant frequency, the phase angle of the ultrasonic transducer is 0, which represents that the ultrasonic transducer is purely resistive and has no inductive or capacitive consumption.
In order to determine the optimal excitation frequency of the ultrasonic transducer, the present embodiment measures the impedance characteristics of the ultrasonic transducer without inductive and phase characteristics. The measuring method is an impedance spectrum method, and the principle is that the impedance value and the phase angle under different frequencies are obtained by changing the frequency of a sine wave, and the impedance spectrum of the ultrasonic transducer is obtained after an impedance-frequency diagram and a phase-frequency diagram are made. According to the measurement result, two peaks appear in the impedance diagram of the ultrasonic transducer, wherein the minimum value is the resonance frequency point of the ultrasonic transducer, and the maximum value is the anti-resonance frequency point of the ultrasonic transducer. Where the phase of the ultrasonic transducer is 0. Therefore, in order to maximize the output power of the ultrasonic transducer, the resonance frequency point thereof is generally selected as the optimal excitation frequency.
After determining the excitation frequency of the ultrasonic transducer, the present embodiment needs to measure the output power of the ultrasonic transducer. Because the output power cannot be measured directly, the output power of an ultrasonic transducer is generally represented by the end-face output amplitude thereof.
In order for an ultrasonic transducer to achieve target performance, its structure needs to be designed. When the ultrasonic transducer vibrates at the n-order resonance frequency, it generates a standing wave having n nodes in the axial direction, and its structure is deformed into a corresponding shape, i.e., a longitudinal vibration mode. The resonant frequency of the ultrasonic transducer in the set frequency range can be known through modal analysis. And then continuously adjusting the structural size of the ultrasonic transducer according to the resonant frequency value until the resonant frequency value meets the design target.
It should be noted that, the relationship between the n-order longitudinal vibration mode and the resonant frequency and the working frequency in this order is clearly understood by those skilled in the art, so that the description of this embodiment is omitted. (rough content, trouble changes to describe the professionals)
Of course, the modal analysis only performs solid mechanical analysis, and does not include piezoelectric field analysis, and therefore the present embodiment can calculate only the modal shape and resonance frequency, and cannot calculate specific physical quantities. Therefore, the present embodiment requires performing frequency domain analysis and time domain analysis to obtain the impedance spectrum of the ultrasonic transducer. The frequency domain response of the system shows the steady state response of the physical quantity of the system to the excitation input in frequency form. The time domain response of the system shows the transient response of the physical quantity of the system to the excitation. And then, continuously adjusting the size of the ultrasonic transducer according to the simulation result of the ultrasonic transducer to ensure that the performance parameters of the ultrasonic transducer meet the design targets. After the structural optimization design is completed, performance test is required to be carried out on the designed and manufactured ultrasonic transducer, wherein the performance test comprises impedance spectrum measurement and output amplitude measurement. The impedance spectrum of the ultrasonic transducer is obtained by an impedance analyzer, and the end face output amplitude is obtained by a laser Doppler vibrometer. If the resonant frequency value, the impedance value and the output amplitude of the ultrasonic transducer accord with the simulation result and meet the design requirement, the ultrasonic transducer has good performance. So far, the structural design of the ultrasonic transducer is completed.
It should be noted that, the first electromechanical transducer 121 and the second electromechanical transducer 122 are electromechanical transducer components commonly used in the art, and it is clear to a person skilled in the art how to provide the first electromechanical transducer 121 and the second electromechanical transducer 122 with an electric signal of a second-order longitudinal vibration mode resonance frequency and an electric signal of a sixth-order longitudinal vibration mode resonance frequency, respectively, so that the description of this embodiment is omitted. As a further optimization of the present embodiment, the first electromechanical transducer 121 is a first piezoelectric ceramic stack, and the second electromechanical transducer 122 is a second piezoelectric ceramic stack.
More specifically, the first piezoelectric ceramic stack is configured to provide a resonance frequency of a second order longitudinal vibration mode, and the second piezoelectric ceramic stack is configured to provide a resonance frequency of a sixth order longitudinal vibration mode.
As a further optimization, the working frequency of the first piezoelectric ceramic stack is 18-30 khz, and the longitudinal vibration mode order corresponding to the working frequency of the second piezoelectric ceramic stack is an integer multiple of the longitudinal vibration mode order corresponding to the working frequency of the first piezoelectric ceramic stack. For example, the first piezoelectric ceramic stack has a second order longitudinal vibration mode corresponding to the operating frequency, and the second piezoelectric ceramic stack has a third order longitudinal vibration mode corresponding to the operating frequency that is 3 times the operating frequency of the first piezoelectric ceramic stack.
It should be noted that the electromechanical transducer functions to convert the high-frequency electrical signal into longitudinal vibration of the ultrasonic aspirator 100, and that the electromechanical transducer may be replaced with an electromechanical transducer member of a different structure, of a different material, such as a sandwich piezoelectric transducer, a cymbal piezoelectric transducer, a conventional unipiezoelectric ceramic transducer, a flextensional transducer, etc., a material such as PZT, ALN, PVDF, etc., as desired.
As a further optimization of this embodiment, the two electromechanical conversion elements are respectively a first electromechanical conversion element 121 and a second electromechanical conversion element 122, an intermediate connecting rod 130 is disposed between the first electromechanical conversion element 121 and the second electromechanical conversion element 122, the rear end of the first electromechanical conversion element 121 may be connected to the rear cover plate 110, and the front end of the second electromechanical conversion element 122 may be connected to the horn 140.
Further preferably, the hollow tip 150 is a double-exponential horn. According to the dynamic equation, the double-exponential design can amplify ultrasonic vibration generated by the ultrasonic transducer, has energy gathering effect, namely can amplify particle displacement or speed of mechanical vibration, and concentrates ultrasonic energy on a smaller area, so that ultrasonic energy output on a unit area is increased, and tissue cutting is facilitated. In addition, hollow tip 150 may be of a double-cone design, or a composite hollow tip of cone and index, i.e., one cone structure and one index structure.
The first electromechanical transducer 121 and the second electromechanical transducer 122 can be driven by two sets of oscillating circuits, respectively. Referring to fig. 5, in particular, as an example, the first electromechanical transducer 121 may be driven by a high frequency oscillation circuit, and the second electromechanical transducer 122 may be driven by a low frequency oscillation circuit. The high-frequency oscillating circuit comprises a high-frequency oscillator, an LC filter, an amplifier, a high-frequency inverter, a high-frequency transformer, a voltage and current detection circuit, a phase difference detection circuit and a controller, wherein the high-frequency oscillator, the LC filter, the amplifier, the high-frequency inverter and the high-frequency transformer are sequentially and electrically connected with the first electromechanical conversion element 121, the voltage and current detection circuit, the phase difference detection circuit and the controller are sequentially and electrically connected, and the controller is electrically connected with the high-frequency inverter. The low-frequency oscillation circuit comprises a low-frequency oscillator, an LC filter, an amplifier, a low-frequency inverter, a low-frequency transformer, a voltage and current detection circuit, a phase difference detection circuit and a controller, wherein the low-frequency oscillator, the LC filter, the amplifier, the low-frequency inverter and the low-frequency transformer are sequentially electrically connected with the second electromechanical conversion piece 122, the voltage and current detection circuit, the phase difference detection circuit and the controller are sequentially electrically connected, and the controller is electrically connected with the low-frequency inverter.
In addition, the present embodiment also provides a surgical apparatus including the above-described ultrasonic aspirator 100.
Specifically, referring to fig. 2, the surgical device of the present embodiment further includes a housing 200 and a waterway sleeve 300, and the housing 200 and the waterway sleeve 300 are hermetically connected to form a receiving cavity, in which the ultrasonic aspirator 100 is received. In order to achieve the suction effect of the ultrasonic aspirator 100, the axial direction of the ultrasonic aspirator 100 may be hollow, having the suction effect. The exterior will be designed with a corresponding waterway sleeve 300 to provide for the injection of saline to effect the suction and injection of the ultrasonic aspirator 100 as a whole. As one example, the waterway sleeve can be in communication with a peristaltic pump to achieve water absorption and passage.
As a further optimization of the surgical equipment, the ultrasonic aspirator is of a hollow structure, and the hollow structure and the waterway sleeve can be communicated with a peristaltic pump so as to realize water absorption and water passage.
As an illustration of the technical effects of the surgical device of the present embodiment, an experiment of in vitro cutting of liver tissue, which is fresh pig liver, was performed using the surgical device of the present embodiment. To further investigate the effect of the ultrasonic aspirator 100 of the present embodiment on biological soft tissue, the present embodiment performed tissue slice analysis on liver tissue of the above-described experiment. Firstly cutting the incision part into small blocks, placing the small blocks in 10% neutral formalin solution for fixing for 1-2 weeks, washing off the fixing solution after fixing, embedding by an embedding machine, preparing the tissue into 4-thick slices by a slicing machine after embedding, spreading the slices by a spreading machine, and fishing out the completely spread slices by using an adhesive glass slide and drying the slices by a baking machine. Dewaxing the dried glass slide by using dimethylbenzene, soaking by using alcohol with gradually decreasing alcohol concentration, dyeing tissues by using hematoxylin and eosin, dehydrating by using alcohol with gradually increasing alcohol after dyeing is successful, and sealing the glass slide by using neutral resin.
Referring to fig. 4, tissue section analysis shows that liver tissue of the cut region is effectively removed, and no significant tissue carbonization, tissue edema, etc. are seen, which is more advantageous for postoperative recovery than conventional high frequency electric knives, bipolar forceps, etc. The dark circles in the figure are stained nuclei, the presence of which can be considered that the cells are in a viable state after cleavage, and it can be seen that in the viable cell region, the cells are substantially viable, and the width of the cell death region is only 50-150 μm.
Referring to fig. 9 and 10, the cavitation effect under the double-frequency superposition excitation has 2-3 peaks in one superposition period, the largest peak generates cavitation bubbles moving forward, and the smaller peak generates a certain cavitation bubble group.
Therefore, the surgical device according to the present embodiment can effectively remove tissues such as liver tissue, and can inactivate only surrounding tissues without carbonization of tissues similar to those produced by a high-frequency electric knife, thereby creating a good condition for postoperative recovery.
The invention and its embodiments have been described above by way of illustration and not limitation, and the invention is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present invention.
Claims (8)
1. An ultrasonic aspirator, characterized in that: the ultrasonic transducer comprises an amplitude transformer and at least two electromechanical conversion pieces, wherein the amplitude transformer is positioned between the hollow working tip and the electromechanical conversion pieces, the at least two electromechanical conversion pieces comprise at least one first electromechanical conversion piece and at least one second electromechanical conversion piece, and the first electromechanical conversion piece and the second electromechanical conversion piece are respectively used for providing two resonant frequencies so that the tip of the hollow working tip can generate double-frequency overlapped vibration.
2. The ultrasonic aspirator according to claim 1, characterized in that: the first electromechanical conversion element is a first piezoelectric ceramic stack, and the second electromechanical conversion element is a second piezoelectric ceramic stack.
3. The ultrasonic aspirator according to claim 2, characterized in that: the first piezoelectric ceramic stack is used for providing the resonance frequency of the low-frequency longitudinal vibration mode, and the second piezoelectric ceramic stack is used for providing the resonance frequency of the high-frequency longitudinal vibration mode.
4. An ultrasonic aspirator according to claim 3, characterized in that: the working frequency of the first piezoelectric ceramic stack is 15-30 kHz, and the longitudinal vibration mode order corresponding to the working frequency of the second piezoelectric ceramic stack is an integral multiple of the longitudinal vibration mode order corresponding to the working frequency of the first piezoelectric ceramic stack.
5. The ultrasonic aspirator according to claim 1, characterized in that: the electromechanical conversion parts are two, the two electromechanical conversion parts are a first electromechanical conversion part and a second electromechanical conversion part respectively, and an intermediate connecting rod is arranged between the first electromechanical conversion part and the second electromechanical conversion part.
6. A surgical device, characterized by: an ultrasonic aspirator comprising any of claims 1-5.
7. The surgical device of claim 6, wherein: still include shell and water route cover, shell and water route cover sealing connection form and hold the chamber, the ultrasonic aspirator is held hold the intracavity, water route cover can communicate with peristaltic pump to realize absorbing water and leading to water.
8. The surgical device of claim 7, wherein: the ultrasonic aspirator is of a hollow structure, and the hollow structure and the waterway sleeve can be communicated with the peristaltic pump so as to realize water absorption and water passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311658108.5A CN117503282A (en) | 2023-12-06 | 2023-12-06 | Ultrasonic aspirator and surgical device with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311658108.5A CN117503282A (en) | 2023-12-06 | 2023-12-06 | Ultrasonic aspirator and surgical device with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117503282A true CN117503282A (en) | 2024-02-06 |
Family
ID=89745593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311658108.5A Pending CN117503282A (en) | 2023-12-06 | 2023-12-06 | Ultrasonic aspirator and surgical device with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117503282A (en) |
-
2023
- 2023-12-06 CN CN202311658108.5A patent/CN117503282A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9622749B2 (en) | Ultrasonic generator systems and methods | |
| US8439938B2 (en) | Variable frequency phacoemulsification handpiece | |
| US7554343B2 (en) | Ultrasonic transducer control method and system | |
| AU636729B2 (en) | Method and apparatus for controlling ultrasonic fragmentation of body tissue | |
| US20010011176A1 (en) | Torsional ultrasound tip | |
| JPS63501845A (en) | Ultrasonic surgical handpiece | |
| JP2001170066A (en) | Ultrasonic treatment tool | |
| Zhang et al. | Proposal for a novel elliptical ultrasonic aspirator and its fundamental performance in cartilage removal | |
| CN213667603U (en) | High intensity focused ultrasound system for selectively sealing vascular networks | |
| CN117503282A (en) | Ultrasonic aspirator and surgical device with same | |
| Hofmann et al. | Development and evaluation of a titanium-based planar ultrasonic scalpel for precision surgery | |
| US20190217346A1 (en) | Dual-frequency untrasonic cleaning apparatus | |
| Lin et al. | Analysis of the sandwich ultrasonic transducer with two sets of piezoelectric elements | |
| Liao et al. | A dual-frequency ultrasonic aspirator (DFUA) based on a novel Langevin transducer | |
| Lal | Silicon-based ultrasonic surgical actuators | |
| Lockhart et al. | Silicon micromachined ultrasonic scalpel for the dissection and coagulation of tissue | |
| Sun et al. | A novel single-element dual-frequency ultrasound transducer for image-guided precision medicine | |
| Friedrich et al. | Silicon micromachined ultrasonic transducer with improved power transfer for cutting applications | |
| Kim et al. | Development of transmitters in dual-frequency transducers for interventional contrast enhanced imaging and acoustic angiography | |
| Li et al. | Comparison of performance of ultrasonic surgical cutting devices incorporating PZT piezoceramic and Mn: PIN-PMN-PT piezocrystal | |
| CN207505874U (en) | A kind of ultrasonic drying device | |
| RU2002135760A (en) | ULTRASONIC VIBRATION SYSTEM FOR PLASTIC SURGERY | |
| Kuang | Resonance tracking and vibration stabilisation of ultrasonic surgical instruments | |
| CN219461318U (en) | Ultrasonic knife host computer and ultrasonic knife system | |
| JPH11113920A (en) | Ultrasonic operation apparatus using multi-frequency harmonious oscillation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |