CN116439786A - Ultrasonic surgical knife and optimization method thereof - Google Patents
Ultrasonic surgical knife and optimization method thereof Download PDFInfo
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- CN116439786A CN116439786A CN202310361761.9A CN202310361761A CN116439786A CN 116439786 A CN116439786 A CN 116439786A CN 202310361761 A CN202310361761 A CN 202310361761A CN 116439786 A CN116439786 A CN 116439786A
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- knife
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- blade
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- 238000005457 optimization Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 16
- 229910001069 Ti alloy Inorganic materials 0.000 claims abstract description 19
- 239000000956 alloy Substances 0.000 claims abstract description 19
- 230000001902 propagating effect Effects 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims description 8
- 238000005070 sampling Methods 0.000 claims description 8
- 238000000605 extraction Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000000644 propagated effect Effects 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 14
- 230000023597 hemostasis Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 210000004872 soft tissue Anatomy 0.000 description 4
- 238000012360 testing method Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 210000004204 blood vessel Anatomy 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002439 hemostatic effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Classifications
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- 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
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 surgical knife and an optimization method thereof, and relates to the technical field of ultrasonic medical appliances, wherein the ultrasonic surgical knife is made of medical titanium alloy materials and comprises a knife head, a knife bar and a knife tail, the knife tail is connected with a transducer, and the length L of the knife bar is as follows:λ=c/f, where λ is the wavelength at which the ultrasonic wave propagates in the tool bar; c is the longitudinal wave velocity of the ultrasonic wave propagating in the cutter bar; f is the working frequency of the cutter bar; n is a half wavelength number. According to the longitudinal wave speed c and the acoustic wave transmission theory propagated in different medical titanium alloy materials, the vibration gain obtained by the cutter head is combined through the cutter handle, the half-wave length corresponding to the acoustic wave propagation in the medical titanium alloy materials is flexibly selected, the length of the ultrasonic surgical knife rod is designed, and the stability of the performance of the ultrasonic surgical knife is realized.
Description
Technical Field
The invention relates to the technical field of ultrasonic medical instruments, in particular to an ultrasonic surgical knife and an optimization method thereof.
Background
In modern clinic, ultrasonic soft tissue cutting hemostasis systems are gradually applied to various surgical operations, and surgeons operate ultrasonic knives to complete various complex operations such as cutting, hemostasis and the like. The ultrasonic soft tissue cutting system has coagulation hemostasis effect when cutting, can reduce the trauma to the patient to the greatest extent while achieving the purpose of surgery, and is widely applied and promoted. The ultrasonic soft tissue cutting hemostasis system mainly comprises a transducer for receiving a host machine electric signal to provide output kinetic energy, wherein the electric signal is converted by the transducer to generate ultrasonic vibration, and the amplification gain is realized at a cutter head through a connecting device and an ultrasonic cutter bar. This makes the vibration gain of the main body cutter bar as a vibration transmission, and the degree of vibration distribution of the actual cutting and hemostatic cutter head particularly important.
With the popularization of ultrasonic surgical applications and the development of modern technology, medical instrument related institutions have begun to further optimize the performance of ultrasonic surgical scalpels. This makes it possible to improve the gain of the ultrasonic blade bar body to the vibrations from the transducer and the uniformity of the ultrasonic blade head output vibrations, which are the main objectives for optimizing the performance of the ultrasonic blade, but because the parameters of the medical titanium alloy selected for each batch may be different, this may also result in a lack of stability in the performance of the finished ultrasonic blade.
Disclosure of Invention
The invention solves the problem of how to further optimize the performance of the ultrasonic surgical knife according to different medical titanium alloy material parameters.
In order to solve the problems, the invention provides an ultrasonic surgical knife which is prepared from a medical titanium alloy material and comprises a knife head, a knife bar and a knife tail, wherein the knife tail is connected with a transducer, and the length L of the knife bar is as follows:
λ＝c/f，
wherein lambda is the wavelength of the ultrasonic wave propagating in the cutter bar; c is the longitudinal wave velocity of the ultrasonic wave propagating in the cutter bar; f is the working frequency of the cutter bar; n is a half wavelength number.
Further, the half wavelength number n is 9.
Further, the operating frequency comprises 55.5kHz.
Further, the cutter tail is connected with the transducer and is fixedly connected with the transducer through a stud.
Compared with the prior art, the ultrasonic surgical knife has the advantages that the stability problem of the quality of the ultrasonic surgical knife is affected by considering the difference of material parameters of different batches of medical titanium alloy materials, so that the length of the ultrasonic surgical knife rod is designed according to the longitudinal wave speed c transmitted in different medical titanium alloy materials, and the stability of the performance of the ultrasonic surgical knife is improved. Meanwhile, according to the acoustic wave transmission theory, the vibration gain obtained by combining the cutter handle with the cutter head is flexibly selected to correspond to the half-wave length of acoustic wave propagation in the medical titanium alloy material, so that the performance of the ultrasonic surgical knife is in accordance with the actual application scene of the ultrasonic surgical knife, the amplitude gain of the cutter head can be obtained to the greatest extent, the performance of the ultrasonic surgical knife is further optimized, and the optimal vibration effect meeting the requirements of cutting and hemostasis is further obtained.
In order to solve the problems, the invention also provides an optimization method of the ultrasonic surgical knife, which is characterized in that according to the half-wave length and the ultrasonic propagation characteristics, the performance parameters of the point position extraction knife bar in the three directions X, Y and Z in the coordinate system are uniformly selected under the characteristic frequency, the corresponding limiting performance parameters are set, and the structural parameters of the knife bar are adjusted according to the limiting performance parameters.
Further, the performance parameters include an amplitude parameter and a stress parameter.
Further, the characteristic frequency is in the range of 1% of the operating frequency f=55.5 kHz.
Further, according to the medical titanium alloy material properties, the limiting amplitude parameters and the limiting stress parameters, cutter bar optimization limiting parameters are set, and under the conditions of initial structural parameters and optimization limiting parameters of the cutter bar, all section structural parameters among cutter bar point positions are adjusted, so that the amplitude optimization of the cutter head is realized.
Further, sampling points are selected for the cutter head, different weight values are given to the sampling points according to practical application requirements, the functional relation between the cutter bar and the cutter head is constructed, parameterized scanning and optimization processing are carried out, and the structural parameters of the cutter head are obtained.
Further, the cutter head comprises a cutter head connecting section and a bending section which are connected with each other, one end of the bending section is a cutter point end face, the weight value given to the cutter point end face is 1, and the weight value is gradually reduced along the cutter bar direction until the weight value at the joint of the cutter head connecting section and the cutter bar is set to be 0.1.
Compared with the prior art, the optimization method of the ultrasonic surgical knife has the advantages that according to the half-wave length and the ultrasonic wave propagation characteristics, the performance parameters of the point position extraction knife bar in the three directions X, Y and Z in the coordinate system are uniformly selected under the characteristic frequency, the limiting performance parameters are set, the transmission main body knife bar is optimized, and the performance of the ultrasonic surgical knife is further optimized by combining the application scene and the limiting performance parameters with different medical titanium alloy material parameters. Other advantages of the present invention are the same as those of the ultrasonic surgical blade with respect to the prior art, and are not described in detail herein.
Drawings
FIG. 1 is a schematic view of an optimized overall structure of an ultrasonic surgical blade according to an embodiment of the present invention;
FIG. 2 is a schematic view of the length of a cutter bar of an ultrasonic surgical blade based on acoustic wave propagation according to an embodiment of the present invention;
FIG. 3 is a schematic view of the primary amplitude of the axis of an ultrasonic surgical blade according to an embodiment of the present invention;
fig. 4 is a schematic view of an optimized structure of an ultrasonic scalpel head according to an embodiment of the present invention;
fig. 5 is a schematic diagram of amplitude after the amplitude of the ultrasonic scalpel head is optimized uniformly according to the embodiment of the invention.
Reference numerals illustrate:
1-a cutter head; 2-a cutter bar; 3-cutter tail; 4-stud bolts; 5-a cutter head connecting section; 6-bending sections; 7-knife tip end face.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. The present invention will be described in further detail below: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of protection of the present invention is not limited to the following embodiments.
Specifically, as shown in fig. 1 to 3, the embodiment of the invention provides an ultrasonic surgical knife which is made of medical titanium alloy materials and comprises a knife head 1, a knife bar 2 and a knife tail 3, wherein the knife tail 3 is connected with a transducer, and the length L of the knife bar 2 is as follows:
λ＝c/f，
wherein lambda is the wavelength of the ultrasonic wave propagating in the cutter bar 2; c is the longitudinal wave velocity of the ultrasonic wave propagating in the cutter bar 2; f is the working frequency of the cutter bar 2; n is a half wavelength number.
According to the ultrasonic surgical knife disclosed by the embodiment of the invention, the problem that the stability of the quality of the ultrasonic surgical knife is affected by considering the difference of material parameters of different batches of medical titanium alloy materials is solved, so that the length of the ultrasonic surgical knife bar 2 is designed according to the longitudinal wave velocity c transmitted in different medical titanium alloy materials, and the stability of the performance of the ultrasonic surgical knife is improved. Meanwhile, according to the acoustic wave transmission theory, the vibration gain obtained by the tool bit 1 through the tool handle is combined, the half-wave length corresponding to acoustic wave propagation in the medical titanium alloy material is flexibly selected, the performance of the ultrasonic surgical knife is achieved, the practical application scene of the ultrasonic surgical knife is met, the amplitude gain of the tool bit 1 can be obtained to a large extent, the performance of the ultrasonic surgical knife is further optimized, and the optimal vibration effect meeting cutting and hemostasis is further obtained.
In some specific embodiments, the half wavelength number n is 9, as shown in fig. 2. In the embodiment, the cutter head 1 obtains larger vibration gain, according to the acoustic wave transmission theory, the 9 half-wave lengths are in accordance with the practical application scene of the ultrasonic surgical knife, and the amplitude gain of the cutter head 1 can be obtained to the greatest extent, so that the range of the ultrasonic cutter head 1 is in the optimal vibration state, stable control of the amplitude of the cutter head 1 is realized when the ultrasonic surgical knife is used, the amplitude of the cutter head 1 is uniform, and the efficiency of cutting soft tissues and coagulating blood vessels is greatly improved.
In some specific embodiments, the operating frequency comprises 55.5kHz. The working frequency is the actual working frequency of the ultrasonic surgical knife, so that the ultrasonic surgical knife can consider the actual working environment, and the application performance is improved.
In some specific embodiments, the blade tail 3 is connected to the transducer and is secured by a stud 4. Therefore, when the performance of the cutter bar 2 is tested, the input end of the cutter bar 2 is tightly connected with the transducer, the impedance and the heating condition of the end during testing are reduced, the testing precision is improved, and the negative influence of the connecting structure on the overall performance of the cutter bar 2 is reduced.
The embodiment of the invention also provides an optimization method of the ultrasonic surgical knife, which is characterized in that according to the half-wave length and the ultrasonic propagation characteristic, the performance parameters of the point position extraction knife bar 2 in the three directions X, Y and Z in the coordinate system are uniformly selected, the corresponding limiting performance parameters are set, and the structural parameters of the knife bar 2 are adjusted according to the limiting performance parameters.
According to the optimization method of the ultrasonic surgical knife, according to the half-wave length and the ultrasonic propagation characteristics, under the characteristic frequency, the performance parameters of the point location extraction knife bar 2 in the three directions X, Y and Z in the coordinate system are uniformly selected, the limiting performance parameters are set, the transmission main body knife bar 2 is optimized, and the performance of the ultrasonic surgical knife is further optimized by combining the application scene and the limiting performance parameters with different medical titanium alloy material parameters. Other advantages of the embodiments of the present invention are the same as those of the ultrasonic surgical blade described in the above embodiments with respect to the prior art, and will not be described in detail herein.
In some specific embodiments, the performance parameters include an amplitude parameter and a stress parameter. Therefore, the amplitude parameter of the cutter bar 2 is considered, the cutter bar is further transited to the amplitude parameter of the cutter head 1, the control of the amplitude parameter of the cutter head 1 is accurate, meanwhile, the stress parameter of the cutter bar 2 is considered, the propagation and use stability of the cutter bar 2 are improved, the service life is prolonged, and the use risk is reduced.
In some specific embodiments, the characteristic frequency is in the range of 1% of the operating frequency f=55.5 kHz. Therefore, in the range of 1% of the working frequency f=55.5 kHz, the accurate corresponding function relation between the parameters is favorably established and acquired, and the adjustment difficulty of the cutter bar 2 is notified to be reduced.
In some specific embodiments, according to the properties of the medical titanium alloy material, the limiting amplitude parameter and the limiting stress parameter, the optimizing limiting parameter of the cutter bar 2 is set, and under the conditions of the initial structural parameter and the optimizing limiting parameter of the cutter bar 2, the structural parameters of each section between the cutter bar 2 points are adjusted, so that the amplitude optimization of the cutter head 1 is realized.
Therefore, various parameters are comprehensively considered, the cutter bar 2 structure is optimized, the preparation and use stability of ultrasonic surgical knives in different batches is improved, and the performance optimization of the ultrasonic surgical knives is realized.
In some specific embodiments, as shown in fig. 4 and fig. 5, sampling points are selected for the tool bit 1, different weight values are given to the sampling points according to practical application requirements, a functional relationship between the tool bar 2 and the tool bit 1 is constructed, and parameterized scanning and optimization processing are performed to obtain structural parameters of the tool bit 1.
Specifically, the structure of the cutter head 1 is refined, and the uniformity of the region of the cutter head 1 in actual work is optimized according to the characteristic that the region used for cutting and closing is different, so that the cutter head 1 is more fit with actual requirements.
In some specific embodiments, the tool bit 1 includes a tool bit connecting section 5 and a bending section 6 that are connected to each other, one end of the bending section 6 is a tool tip end surface 7, the weight value given to the tool tip end surface 7 is 1, and the weight value gradually decreases along the direction of the tool bar 2 until the weight value at the connection position of the tool bit connecting section 5 and the tool bar 2 is set to 0.1. Therefore, the weight value is set according to the action weight of the cutting area, the amplitude of each part of the cutter head 1 is optimized, and the practical application effect is improved.
Example 1:
the ultrasonic surgical knife and the optimization method thereof in the embodiment specifically comprise the following steps:
the length of the whole ultrasonic knife bar 2 of the ultrasonic surgical knife in the embodiment of the invention is according to the medical titanium alloyMaterial longitudinal wave velocity determination, wherein according to the working frequency f=55.5 kHz, the wavelength λ=c/f, the length L is characterized by an integer multiple of half wavelengthn is 9, and further L is 405.07mm.
In the optimization method of the ultrasonic surgical knife provided by the embodiment of the invention, the characteristic frequency is limited within the range of 1% of the working frequency f=55.5 kHz, a reference point is selected every 1mm on the axis of the ultrasonic surgical knife bar 2, the vibration amplitude and stress amplitude data of X, Y and Z axes on the point are extracted, the maximum stress of each point is limited to 350MPa according to actual conditions, the maximum amplitude is 35um, an optimization relation is constructed, and the knife bar 2 with the initial diameter of 3mm is optimized.
After optimization, in the embodiment of the invention, the total length of the cutter bar 2 is 405.07mm, the length of the cutter head 1 is 28.72mm, and the length of the cutter tail 3 is 32.03mm, wherein parameters of each section of the cutter bar 2 are shown in table 1.
TABLE 1
In the embodiment of the invention, on the premise of ensuring the rationalization of the stress, as shown in fig. 5, the ultrasonic scalpel head 1 can achieve more than 120um of uniform amplitude at maximum, and the maximum amplitude difference between the upper edge and the lower edge is only 6.3um on the cutting surface of the bending section 6, so that the ultrasonic scalpel has better uniformity and can provide better effect in practical application.
The length and the diameter are only selected according to the material parameters and the target limiting conditions under the characteristic conditions of the embodiment, and can be optimized to other sizes, and if the optimization effect is required to be continuously improved, the sampling point spacing can be reduced, so that fine design is performed.
In the embodiment of the invention, sampling points with the interval of 0.01mm are taken from the cutter head 1 part of the ultrasonic surgical knife, different weights are given to the cutter head 1 part from 0.1 to 1 according to the actual cutting and hemostasis positions and the use state, wherein the weight value of the cutter head end face 7 is 1, the far end of the cutter head 1 in the cutting area is the minimum value of 0.1, namely the weight value is gradually reduced along the direction of the cutter bar 2, and the weight value is set to be 0.1 at the joint of the cutter head connecting section 5 and the cutter bar 2. And constructing a corresponding function, selecting each structural value through parameterized scanning, determining the numerical value shown in table 1 as an optimized result, and finally realizing uniform and excessive vibration intensity on the part of the tool bit 1.
The diameter in this embodiment is only selected according to the above material parameters and target limitation conditions under the characteristic conditions of this embodiment, and may be further optimized according to practical situations.
In the foregoing, the present invention is merely preferred embodiments, which are based on different implementations of the overall concept of the invention, and the protection scope of the invention is not limited thereto, and any changes or substitutions easily come within the technical scope of the present invention as those skilled in the art should not fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides an ultrasonic surgical sword adopts medical titanium alloy material preparation, its characterized in that includes tool bit (1), cutter arbor (2) and tail (3), tail (3) are connected with the transducer, the length L of cutter arbor (2) is:
λ＝c/f，
wherein lambda is the wavelength of the ultrasonic wave propagating in the cutter bar (2); c is the longitudinal wave velocity of the ultrasonic wave propagating in the cutter bar (2); f is the working frequency of the cutter bar (2); n is a half wavelength number.
2. The ultrasonic surgical blade of claim 1, wherein the half wavelength number n is 9.
3. The ultrasonic surgical blade of claim 1, wherein the operating frequency comprises 55.5kHz.
4. Ultrasonic surgical blade according to claim 1, characterized in that the blade tail (3) is connected to the transducer and is fixed by means of a stud (4) connection.
5. An optimization method of an ultrasonic surgical blade according to any one of claims 1 to 4, characterized in that, according to the half-wave length and the ultrasonic propagation characteristics, the performance parameters of the point location extraction tool bar (2) in three directions X, Y and Z in the coordinate system are uniformly selected at the characteristic frequency, corresponding limiting performance parameters are set, and the structural parameters of the tool bar (2) are adjusted according to the limiting performance parameters.
6. The method of optimizing an ultrasonic surgical blade of claim 5, wherein the performance parameters comprise an amplitude parameter and a stress parameter.
7. The method of optimizing an ultrasonic surgical blade of claim 6, wherein the characteristic frequency is in the range of 1% of the operating frequency f = 55.5kHz.
8. The optimization method of the ultrasonic surgical knife according to claim 7, wherein the optimization limiting parameters of the knife bar (2) are set according to the properties of the medical titanium alloy material, the limiting amplitude parameters and the limiting stress parameters, and the structure parameters of each section among the points of the knife bar (2) are adjusted under the conditions of the initial structure parameters and the optimization limiting parameters of the knife bar (2) so as to optimize the amplitude of the knife head (1).
9. The optimization method of the ultrasonic surgical knife according to claim 8, wherein sampling points are selected for the knife head (1), different weight values are given to the sampling points according to practical application requirements, a functional relation between the knife bar (2) and the knife head (1) is constructed, parameterized scanning and optimization processing are carried out, and structural parameters of the knife head (1) are obtained.
10. The optimizing method of the ultrasonic surgical blade according to claim 9, wherein the blade head (1) comprises a blade head connecting section (5) and a bending section (6) which are connected with each other, one end of the bending section (6) is a blade tip end face (7), the weight value given to the blade tip end face (7) is 1, and the weight value is gradually reduced along the direction of the blade bar (2) until the weight value at the joint of the blade head connecting section (5) and the blade bar (2) is set to 0.1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310361761.9A CN116439786A (en) | 2023-04-07 | 2023-04-07 | Ultrasonic surgical knife and optimization method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310361761.9A CN116439786A (en) | 2023-04-07 | 2023-04-07 | Ultrasonic surgical knife and optimization method thereof |
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| Publication Number | Publication Date |
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| CN116439786A true CN116439786A (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310361761.9A Withdrawn CN116439786A (en) | 2023-04-07 | 2023-04-07 | Ultrasonic surgical knife and optimization method thereof |
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| Country | Link |
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| CN (1) | CN116439786A (en) |
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2023
- 2023-04-07 CN CN202310361761.9A patent/CN116439786A/en not_active Withdrawn
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Application publication date: 20230718 |