CN219397467U - Ultrasonic surgical instrument, system and transducer - Google Patents
Ultrasonic surgical instrument, system and transducer Download PDFInfo
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- CN219397467U CN219397467U CN202222944626.0U CN202222944626U CN219397467U CN 219397467 U CN219397467 U CN 219397467U CN 202222944626 U CN202222944626 U CN 202222944626U CN 219397467 U CN219397467 U CN 219397467U
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- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
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- 230000035602 clotting Effects 0.000 description 3
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- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
An ultrasonic surgical instrument, system and transducer, wherein the ultrasonic surgical instrument includes a transducer including an horn, a locking assembly, a piezoelectric assembly and a mass. The horn includes a first connection portion and a first mating portion. The locking assembly comprises a second connecting part and a locking part arranged at one end of the second connecting part, a second matching part is arranged at the other end of the second connecting part, and the second matching part is matched and connected with the first matching part. The piezoelectric component is sleeved on the second connecting portion and located between the first matching portion and the locking portion, and abuts against the end face of the first matching portion. The mass block is sleeved on the second connecting part and is positioned between the piezoelectric component and the locking part, and the locking part locks the piezoelectric component between the amplitude transformer and the locking part through the mass block. The acoustic impedance of the mass block and/or the locking component is greater than that of the amplitude transformer, and the length from one side of the first connecting part far away from the locking part to one side of the locking part far away from the first connecting part is not greater than the wavelength of ultrasonic vibration.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to an ultrasonic surgical instrument, an ultrasonic surgical system and an ultrasonic transducer.
Background
The medical transducer is used for converting the energy output by the host into ultrasonic energy and mechanical vibration energy, and then acts on human tissues through the end effector, such as a cutter head, so as to achieve the purpose of treating diseases through operation. The transducer is a core component of the ultrasonic surgical instrument, and determines the ultrasonic surgical effect and the service life of the ultrasonic surgical instrument.
At present, some transducers in the market have high impedance of an amplitude transformer, the amplitude transformer blocks the propagation of ultrasonic vibration, so that the output efficiency of the transducer is low, the size of the existing transducer is large, the whole transducer is heavy, and a doctor can easily cause hand fatigue after long-time use.
Disclosure of Invention
In view of this, the present utility model proposes ultrasonic surgical instruments, systems and transducers.
An ultrasonic surgical instrument according to a first aspect of the present utility model includes an end effector disposed at a distal end of a waveguide rod, a handle assembly, and a transducer cooperatively mounted with the handle assembly and coupled to a proximal end of the waveguide rod for generating ultrasonic vibrations that can be transmitted to the end effector via the waveguide rod, wherein the transducer includes:
a horn including a first connection portion and a first mating portion, the first connection portion being for connecting the waveguide rod;
the locking assembly comprises a columnar second connecting part and a locking part arranged at one end of the second connecting part, the maximum outer diameter of the locking part is larger than that of the second connecting part, a second matching part is arranged at the other end of the second connecting part, and the second matching part is used for being matched and connected with the first matching part;
the piezoelectric component is sleeved on the second connecting part and positioned between the first matching part and the locking part, and is abutted against the end face of the first matching part;
the mass block is sleeved on the second connecting part and positioned between the piezoelectric component and the locking part, and the locking part locks the piezoelectric component between the amplitude transformer and the locking part through the mass block;
the acoustic impedance of the mass block and/or the locking component is larger than that of the amplitude transformer, and the length from one side of the first connecting part far away from the locking part to one side of the locking part far away from the first connecting part is not larger than the wavelength of ultrasonic vibration.
An ultrasonic surgical system according to a second aspect of the present utility model includes:
a host;
the ultrasonic surgical instrument described above;
the host is electrically connected with the transducer, and the host is used for delivering energy to the transducer.
The transducer according to the third aspect of the present utility model comprises:
a horn including a first connection end and a first mating portion, the first connection portion being for connecting to a waveguide rod of an ultrasonic surgical instrument;
the locking assembly comprises a columnar second connecting part and a locking part arranged at one end of the second connecting part, the maximum outer diameter of the locking part is larger than that of the second connecting part, a second matching part is arranged at the other end of the second connecting part, and the second matching part is used for being matched and connected with the first matching part;
the piezoelectric component is sleeved on the second connecting part and positioned between the first matching part and the locking part, and is abutted against the end face of the first matching part;
the mass block is sleeved on the second connecting part and positioned between the piezoelectric component and the locking part, and the locking part locks the piezoelectric component between the amplitude transformer and the locking part through the mass block;
the acoustic impedance of the mass block and/or the locking component is larger than that of the amplitude transformer, and the length from one side of the first connecting part far away from the locking part to one side of the locking part far away from the first connecting part is not larger than the wavelength of ultrasonic vibration.
According to the technical scheme, the acoustic impedance of the transducer of the ultrasonic surgical instrument provided by the first aspect of the utility model is larger than that of the amplitude transformer by arranging the mass block and/or the locking component, and the mass block and/or the locking component can well reflect ultrasonic vibration, so that ultrasonic vibration generated by the piezoelectric component can be better transmitted out from the amplitude transformer, and the output efficiency of the transducer is improved. In addition, through setting up the length that one side that the locking portion was kept away from to the locking portion was kept away from one side of first connecting portion not more than ultrasonic vibration's wavelength, the overall dimension of transducer is less, and the weight is lighter, has alleviateed ultrasonic surgical apparatus's weight, alleviates the hand fatigue when medical growth time uses ultrasonic surgical apparatus.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained by those skilled in the art without the inventive effort.
FIG. 1 is a schematic diagram of an ultrasonic surgical system according to one embodiment of the present utility model;
FIG. 2 is a schematic view of an ultrasonic surgical instrument according to an embodiment of the present utility model;
FIG. 3 is an exploded view of an ultrasonic surgical instrument according to one embodiment of the present utility model;
FIG. 4 is a schematic diagram of a transducer according to an embodiment of the present utility model;
FIG. 5 is a schematic cross-sectional view of a transducer according to an embodiment of the present utility model;
FIG. 6 is a schematic view of the horn constructed in accordance with one embodiment of the present utility model;
FIG. 7 is a schematic diagram of a piezoelectric assembly according to an embodiment of the present utility model;
FIG. 8 is a schematic view of a locking assembly according to an embodiment of the present utility model;
FIG. 9 is a block diagram illustrating a method of assembling a piezoelectric assembly according to an embodiment of the present utility model;
FIG. 10 is a schematic diagram of a mass according to an embodiment of the present utility model;
FIG. 11 is a schematic diagram of a proof mass according to another embodiment of the present utility model;
FIG. 12 is a schematic diagram of the relationship between the transducer and the ultrasonic vibration wavelength according to an embodiment of the present utility model;
fig. 13 is a block diagram illustrating a method for aligning an outer sidewall of an input section with an outer sidewall of a piezoelectric element according to an embodiment of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in fig. 1, an embodiment of the present utility model proposes an ultrasonic surgical system 1000, the proposed ultrasonic surgical system 1000 comprising a host 100 and a surgical instrument 200, the host 100 being electrically connected to the surgical instrument 200, the host 100 being adapted to deliver energy to the surgical instrument 200. In one use scenario, a physician connects the host 100 to an in-room power source, and according to the physician's settings, the host 100 converts the electrical signal of the in-room power source into a preset electrical signal and outputs the preset electrical signal to the surgical instrument 200, for example, converts the voltage value of the in-room power source into a preset voltage value and outputs the voltage value to the surgical instrument 200, and the physician operates the surgical instrument 200 to perform the operation. Alternatively, surgical instrument 200 may be, but is not limited to, an electric or ultrasonic blade.
As shown in fig. 2 and 3, in some embodiments, an ultrasonic surgical instrument 200 includes an end effector 10, a waveguide rod 20, a handle assembly 30, and a transducer 40, the end effector 10 being disposed at a distal end 20a of the waveguide rod 20, the transducer 40 being cooperatively mounted with the handle assembly 30 and coupled to a proximal end 20b of the waveguide rod 20, the transducer 40 being configured to generate ultrasonic vibrations that can be transmitted to the end effector 10 via the waveguide rod 20. When the ultrasonic surgical instrument 200 is an ultrasonic blade, the end effector 10 is the blade head of the ultrasonic blade. A host 100 is electrically connected to the transducer 40, the host 100 being configured to deliver energy to the transducer 40.
As shown in fig. 4, 5, 6, and 8, in some embodiments, the transducer 40 includes a horn 41, a locking assembly 42, a piezoelectric assembly 43, and a mass 44. The horn 41 includes a first connection 411 and a first mating portion 412, the first connection 411 being used to connect the waveguide rod 20. The locking assembly 42 includes a second connection portion 421 having a cylindrical shape and a locking portion 422 disposed at one end of the second connection portion 421, wherein a maximum outer diameter of the locking portion 422 is greater than a maximum outer diameter of the second connection portion 421, a second mating portion 423 is disposed at the other end of the second connection portion 421, and the second mating portion 423 is mated and connected with the first mating portion 412. The piezoelectric component 43 is sleeved on the second connecting portion 421 and located between the first matching portion 412 and the locking portion 422, and the piezoelectric component 43 abuts against an end surface of the first matching portion 412. The mass block 44 is sleeved on the second connecting portion 421 and is located between the piezoelectric assembly 43 and the locking portion 422, and the locking portion 422 locks the piezoelectric assembly 43 between the amplitude transformer 41 and the locking portion 422 through the mass block 44. Wherein the acoustic impedance of the mass 44 and/or the locking assembly 42 is greater than the acoustic impedance of the horn 41, the length L of the side of the first connection portion 411 remote from the locking portion 422 to the side of the locking portion 422 remote from the first connection portion 411 is no greater than the wavelength of the ultrasonic vibrations, i.e., the length of the transducer 40 is no greater than the wavelength of the ultrasonic vibrations.
The acoustic impedance refers to the resistance that the ultrasonic vibration formed during operation of the piezoelectric assembly 43 needs to overcome to push the medium to displace when the mass 44, the locking assembly 42 and the horn 41 are conducting, the greater the impedance the greater the force required to push the medium and the lesser the impedance the lesser the force required to push the medium.
When the proposed transducer 40 is operated, the piezoelectric assembly 43 is energized to generate ultrasonic vibrations, which propagate in opposite directions along the axis of the transducer 40, with a portion of the ultrasonic vibrations being transmitted through the horn 41 to the waveguide rod 20 and ultimately to the end effector 10, and another portion of the ultrasonic vibrations being directed toward the mass 44 and the locking assembly 42 and partially back to the horn 41 upon reflection by the mass 44 and the locking assembly 42.
After the above technical solution is adopted, in the ultrasonic surgical instrument 200 provided by the embodiment of the utility model, the acoustic impedance of the transducer 40 is greater than that of the amplitude transformer 41 by arranging the mass block 44 and/or the locking component 42, so that the mass block 44 and/or the locking component 42 can well reflect ultrasonic vibration, and ultrasonic vibration generated by the piezoelectric component 43 can be better transmitted out from the amplitude transformer 41, and the output efficiency of the transducer 40 is improved. In addition, by providing the length L from the side of the first connection portion 411 away from the locking portion 422 to the side of the locking portion 422 away from the first connection portion 411 to be not greater than the wavelength of the ultrasonic vibration, the overall size of the transducer 40 is smaller, and the weight is lighter, reducing the weight of the ultrasonic surgical instrument 200, and alleviating hand fatigue when the ultrasonic surgical instrument 200 is used for medical growing time.
As shown in fig. 4, in some embodiments, a length L from a side of the first connection portion 411 remote from the locking portion 422 to a side of the locking portion 422 remote from the first connection portion 411 is approximately equal to half a wavelength of the ultrasonic vibration. The term "approximately equal to" means any value in a range in which the length L is 10% of the length of the half wavelength of the ultrasonic vibration. With this embodiment, the overall size of the transducer 40 is small and lightweight so that the surgeon does not experience significant hand strain with the surgical instrument hand over time.
In some embodiments, the vibration frequency of the piezoelectric assembly 43 is 45kHz-50kHz. Specifically, the vibration frequency of the piezoelectric element 43 may be 45kHz, 46kHz, 47kHz, 48kHz, 49kHz, 50kHz, or the vibration frequency of the piezoelectric element 43 may be any value within a numerical range defined by any two of the above-mentioned numerical values. In the present embodiment, the vibration frequency of the piezoelectric component 43 is 49kHz. By selecting the vibration frequency to be reduced by 49kHz in this embodiment, the effective length of the end effector 10 for cutting human tissue can be increased, thereby increasing the cutting speed, relative to the conventional manner in which the vibration frequency of the piezoelectric assembly 43 is selected to be 55.5 kHz. When the end effector 10 is used to occlude a blood vessel of a human body, the clotting effect on blood vessels of a larger size can be improved, for example, the end effector 10 at the existing vibration frequency can effectively occlude blood vessels of 3 mm or less in diameter, but the clotting effect is poor for thicker blood vessels of 5 to 7 mm in diameter, whereas in the present embodiment, by selecting the vibration frequency of 49kHz, the effective length of the end effector 10 for cutting human tissue is improved, and when occluding thicker blood vessels of 5 to 7 mm in diameter, the better clotting effect can be achieved. In addition, since the effective length of the end effector 10 for cutting human tissue is increased, the field of view of the surgeon during surgery can be improved, and the end effector 10 can be used as a split-gate, reducing the number of instrument component changes during surgery.
Alternatively, the locking assembly 42 is a titanium rod or a titanium alloy rod. The titanium material has larger acoustic impedance, can form better reflection effect on ultrasonic vibration, so that ultrasonic vibration generated by the piezoelectric component 43 can be transmitted to the end effector 10 through the amplitude transformer 41 more, and meanwhile, the titanium material also has higher strength and toughness and long service life.
Optionally, the mass 44 is a stainless steel mass 44 or a titanium metal or titanium alloy mass.
Alternatively, the horn 41 is an aluminum alloy rod. The aluminum alloy material, while satisfying strength and toughness, has a small acoustic impedance so that ultrasonic vibrations generated by the piezoelectric assembly 43 can be well transmitted to the end effector 10.
As shown in fig. 7, in some embodiments, the piezoelectric assembly 43 includes at least two stacked piezoelectric elements 431. Alternatively, the piezoelectric assembly 43 includes four stacked piezoelectric elements 431. Further, the piezoelectric assembly 43 further includes four electrode pads 432, and the four piezoelectric elements 431 and the four electrode pads 432 are staggered. In some embodiments, piezoelectric element 431 employs, but is not limited to, a piezoelectric ceramic tile.
As shown in fig. 7, in some embodiments, the piezoelectric assembly 43 is not in contact with the second connection 421. Specifically, the piezoelectric element 431 is provided with a through hole 433, and the aperture of the through hole 433 is larger than the outer diameter of the second connection portion 421, so that when the second connection portion 421 is disposed through the piezoelectric element 431, the inner sidewall of the through hole 433 is not in contact with the outer sidewall of the second connection portion 421.
As shown in fig. 6, in some embodiments, the first connection 411 is detachably connected to the proximal end 20b of the waveguide rod 20, and in this embodiment, the waveguide rod 20 is easily replaced. Alternatively, the first connection portion 411 is detachably connected to the proximal end 20b of the waveguide rod 20 by screw-fitting, specifically, the first connection portion 411 is provided with a first screw hole 4111 extending in the axial direction of the horn 41, the proximal end 20b of the waveguide rod 20 is provided with external screw threads, and the first connection portion 411 is detachably connected to the proximal end 20b of the waveguide rod 20 by screw-fitting between the external screw threads and the first screw hole 4111. Of course, the first connection 411 and the proximal end 20b of the waveguide 20 are not limited to being detachably connected by a threaded connection, and for example, in other embodiments, the first connection 411 and the proximal end 20b of the waveguide 20 may be detachably connected by a snap fit or pin connection.
It should be noted that, the first connection portion 411 and the proximal end 20b of the waveguide rod 20 are not limited to being detachably connected, for example, in other embodiments, the first connection portion 411 and the proximal end 20b of the waveguide rod 20 may be detachably connected, for example, the first connection portion 411 and the proximal end 20b of the waveguide rod 20 are welded and fixed. The first connecting portion 411 is provided with an assembly hole extending in the axial direction of the horn 41, in which the proximal end 20b of the waveguide rod 20 is inserted by interference fit, or in which the proximal end 20b of the waveguide rod 20 is inserted and fixed by adhesive bonding.
As shown in fig. 6 and 8, in some embodiments, the first mating portion 412 and the second mating portion 423 are detachably connected, and in this embodiment, replacement of the piezoelectric assembly 43 is facilitated. Optionally, the first mating portion 412 and the second mating portion 423 are detachably connected by a threaded fit, specifically, the end surface of the first mating portion 412 is provided with a second threaded hole 4121 extending along the axial direction of the horn 41, the second mating portion 423 is provided with an external thread, and the first mating portion 412 and the second mating portion 423 are connected by a threaded fit through the second threaded hole 4121 and the external thread.
It should be noted that, the connection between the first fitting portion 412 and the second fitting portion 423 is not limited to the connection manner described above, for example, in other embodiments, the first fitting portion 412 is provided with a fitting hole extending along the axial direction of the horn 41, and the second fitting portion 423 is inserted into the fitting hole by an interference fit manner, or the second fitting portion 423 is inserted into the fitting hole and is fixed by an adhesive.
As shown in fig. 9, in some embodiments, the piezoelectric assembly 43 is assembled in the following manner:
and S11, limiting the mass block 44 to rotate around the second connecting part 421. The mass 44 may be held by a clamp to limit its relative rotation with respect to the connection, or may be held by an assembler to limit its relative rotation with respect to the connection by finger pinching.
S12, driving the locking assembly 42 to move, the locking portion 422 pushes the mass 44 to move towards the first matching portion 412, and the locking portion 422, the mass 44 and the first matching portion 412 cooperate together to lock the piezoelectric assembly 43 together.
In some embodiments, the movement of the drive lock assembly 42 includes two steps, one in which the drive lock assembly 42 moves to the first mating portion 412 and the other in which the drive lock assembly 42 rotates to threadingly engage the first mating portion 412.
After the above technical solution is adopted, in the process of driving the locking portion 422 to push the mass block 44 to move towards the first matching portion 412, by limiting the mass block 44 to rotate around the second connecting portion 421, the mass block 44 can be prevented from driving the piezoelectric element 431 close to the mass block 44 to rotate, so that the wire connection of the adjacent piezoelectric element 431 is prevented from breaking during piezoelectric assembly. It will be appreciated that if the piezoelectric element 431 adjacent to the mass 44 rotates, then relative rotation between the piezoelectric element 431 and the piezoelectric element 431 adjacent to the piezoelectric element 431 occurs, resulting in a break in the connection between the piezoelectric elements 431.
As shown in fig. 10, in some embodiments, the mass 44 includes a first end surface 44a and a second end surface 44b opposite the first end surface 44a, the first end surface 44a of the mass 44 abutting the piezoelectric assembly 43, the second end surface 44b of the mass 44 abutting the locking portion 422. Wherein the second end surface 44b of the mass 44 has an area smaller than the first end surface 44a of the mass 44. In this embodiment, the contact area between the mass 44 and the locking portion 422 can be reduced, so that the friction between the mass 44 and the locking portion 422 is reduced, and the pressing portion is not easy to drive the piezoelectric assembly 43 to rotate when the locking portion 422 rotates to lock the piezoelectric assembly 43.
In some embodiments, the second end surface 44b of the mass 44 is a smooth surface, and the friction between the locking member and the mass 44 is less than the friction between the mass 44 and the piezoelectric assembly 43. In this embodiment, by providing the second end surface 44b of the mass 44 as a smooth surface, the friction between the mass 44 and the locking portion 422 can be reduced.
As shown in fig. 10, in some embodiments, the projected profile of the second end surface 44b along the axial direction of the mass 44 is within the profile of the first end surface 44a, and the longitudinal cross-sectional profile of the mass 44 includes a first side line 441 and a second side line 442, the first side line 441 extending from the first end surface 44a toward the second end surface 44b along the axial direction of the mass 44, the second side line 442 extending obliquely from the first side line 441 to the second end surface 44b. It should be noted that the second side line 442 may be a straight line, an arc line, or other irregularly shaped line, as long as the second side line 442 extends obliquely from the first side line 441 to the second end surface 44b, which may be specifically determined according to practical design requirements.
Of course, not limited to the above arrangement, for example, in some other embodiments, as shown in fig. 11, the projection profile of the second end surface 44b along the axial direction of the mass 44 is located within the profile of the first end surface 44a, the longitudinal section profile of the mass 44 includes a third side line 443, a fourth side line 444 and a fifth side line 445, the third side line 443 extends from the first end surface 44a toward the second end surface 44b along the axial direction of the mass 44, the fourth side line 444 extends from the third side line 443 toward the radial direction of the mass 44, and the fifth side line 445 extends from the fourth side line 444 to the second end surface 44b along the axial direction of the mass 44.
In some embodiments, the maximum outer diameter of the mass 44 is consistent with the maximum outer diameter of the piezoelectric assembly 43. In this embodiment, the mass 44 can create a uniform pressure on the piezoelectric assembly 43 after the locking assembly 42 is locked, achieving low impedance, high output performance of the transducer 40. It should be noted that, if the pressure of the mass 44 on the piezoelectric assembly 43 is uneven, the piezoelectric assembly 43 vibrates unevenly, and a local temperature rise of the piezoelectric assembly 43 affects the power output of the transducer 40. Alternatively, the contour of the mass 44 near the end of the piezoelectric element 43 and the contour of the piezoelectric element 43 are both cylindrical.
In some embodiments, as shown in FIG. 12, the transducer 40 has and only has one vibration node Q located at the horn 41. The piezoelectric assembly 43 is located on the same side of the vibration node Q, and in this embodiment, a sealing structure is conveniently provided, and the portion of the piezoelectric assembly 43 that is connected to the power supply is sealed, so that the ultrasonic surgical instrument 200 can be subjected to high-temperature high-pressure sterilization treatment and can be reused.
As shown in fig. 6 and 12, in some embodiments, the horn 41 is provided with a flange portion 413 at the vibration node Q, and the transducer 40 is connected to the handle assembly 30 by the flange portion 413. Since the amplitude of the vibration of the transducer 40 at the vibration node Q is small, by providing the flange portion 413 at the vibration node Q, the transmission of the vibration of the transducer 40 to the handle assembly 30 through the flange portion 413 can be reduced.
As shown in fig. 6 and 12, in some embodiments, the horn 41 is separated by a flange 413 into an input section 414 and an output section 415, the input section 414 being in abutment with the piezoelectric assembly 43 and the output section 415 being adapted for connection to the horn 41. In this embodiment, by providing the input section 414 on one side of the flange portion 413 such that the piezoelectric component 43 is away from the vibration node Q, which can reduce mechanical loss and avoid damage to the piezoelectric component 43 due to excessive pressure. In addition, by providing the piezoelectric element 43 away from the vibration node Q, dielectric loss can be reduced, the electromechanical conversion capability of the piezoelectric element 43 can be fully exhibited, and the electromechanical conversion efficiency can be improved. In some embodiments, the horn 41 is not provided with a flange portion 413, and the input section 414 and the output section 415 are separated by a vibration node Q.
In some embodiments, the maximum outer diameter of the input section 414 coincides with the maximum outer diameter of the piezoelectric assembly 43. In this embodiment, the horn 41 can provide uniform pressure to the piezoelectric assembly 43, resulting in low impedance, high output performance of the transducer 40. It should be noted that, if the pressure of the input section 414 on the piezoelectric assembly 43 is uneven, the piezoelectric assembly 43 vibrates unevenly, and a local temperature rise of the piezoelectric assembly 43 affects the power output of the transducer 40.
In some embodiments, the outer contour of the input section 414 and the outer contour of the piezoelectric assembly 43 are both cylindrical. In this embodiment, the positioning and mounting of the piezoelectric assembly 43 and the input section 414 is facilitated such that the outer sidewall of the piezoelectric assembly 43 is substantially flush with the outer sidewall of the input section 414 after the piezoelectric assembly 43 is mounted.
As shown in fig. 6, in some embodiments, the output section 415 includes a first extension 4151, a second extension 4152, and a third extension 4153 coaxially connected in order, the first extension 4151 being connected to the flange portion 413, the third extension 4153 being connected to the waveguide rod 20, the third extension 4153 having an outer diameter smaller than the outer diameter of the first extension 4151. The profile line of the longitudinal section of the second extension 4152 is a catenary curve. In this embodiment, the outer diameter of the horn 41 decreases from the first extension 4151 through the second extension 4152 to the third extension 4153, which may provide an effect of increasing the amplitude of the horn 41.
Optionally, the cross-sectional profile of the first extension 4151, the second extension 4152 and the third extension 4153 are all circular.
In some embodiments, as shown in fig. 6, the ratio of the cross-sectional area of the first extension 4151 to the cross-sectional area of the third extension 4153 is 5.5-6.5. Specifically, the ratio of the cross-sectional area of the first extension 4151 to the cross-sectional area of the third extension 4153 may be 5.5, 6.0, 6.5, or the ratio of the cross-sectional area of the first extension 4151 to the cross-sectional area of the third extension 4153 may be any value within a numerical range defined by any two of the above-mentioned values. In this embodiment, by controlling the ratio of the cross-sectional area of the first extension 4151 to the cross-sectional area of the third extension 4153 to be in the range of 5.5-6.5, the horn 41 can be made to take a balance point between increasing the amplitude and increasing the bandwidth, thereby enabling the horn 41 to stably output power.
As shown in FIG. 6, in some embodiments, the ratio of the axial length M1 of the first extension 4151, the axial length M2 of the second extension 4152, and the axial length M3 of the third extension 4153 is (0.9-1.1): (3.2-3.8): (6.3-7.7). In some embodiments, the ratio of the axial length M1 of the first extension 4151, the axial length M2 of the second extension 4152, and the axial length M3 of the third extension 4153 is 1:3.5:7. In this embodiment, too, the horn 41 is designed to take a balance point between increasing the amplitude and increasing the bandwidth, so that the horn 41 can output power stably.
As shown in fig. 4, in some embodiments, the periphery of the flange 413 is provided with a plurality of grooves 4131, and the plurality of grooves 4131 are spaced apart along the circumference of the flange 413. In this embodiment, the compliance of the flange 413 can be increased, and vibration isolation capability can be improved.
In some embodiments, the number of grooves 4131 is an even number, and may be symmetrically distributed to provide uniform vibration isolation. Of course, the number of the grooves 4131 may be odd, and may be determined according to practical design requirements.
In some embodiments, the projection profile of the groove 4131 in the axial direction of the horn 41 is a circular arc. Of course, the shape is not limited to an arc, but can be other shapes, and the shape can be specifically determined according to actual design requirements.
As shown in fig. 8, in some embodiments, the second connection 421 and the locking 422 portions transition smoothly. Periodic impact is generated on the locking part 422 when the piezoelectric assembly 43 is electrified and vibrated, in this embodiment, by setting the second connection part 421 and the locking part 422 to be in smooth transition, the situation that stress concentration occurs between the second connection part 421 and the locking part 422 to cause cracks between the second connection part 421 and the locking part 422 can be reduced, so that the service life of the transducer 40 can be prolonged.
The embodiment of the present utility model also proposes a transducer 40, the proposed transducer 40 comprising a horn 41, a locking assembly 42, a piezoelectric assembly 43 and a mass 44. The horn 41 includes a first connection end and a first mating portion 412, the first connection portion 411 being used to connect the waveguide 20 of the ultrasonic surgical instrument 200. The locking assembly 42 includes a second connection portion 421 having a cylindrical shape and a locking portion 422 disposed at one end of the second connection portion 421, wherein a maximum outer diameter of the locking portion 422 is greater than a maximum outer diameter of the second connection portion 421, a second mating portion 423 is disposed at the other end of the second connection portion 421, and the second mating portion 423 is mated and connected with the first mating portion 412. The piezoelectric component 43 is sleeved on the second connecting portion 421 and located between the first matching portion 412 and the locking portion 422, and the piezoelectric component 43 abuts against an end surface of the first matching portion 412. The mass block 44 is sleeved on the second connecting portion 421 and is located between the piezoelectric assembly 43 and the locking portion 422, and the locking portion 422 locks the piezoelectric assembly 43 between the amplitude transformer 41 and the locking portion 422 through the mass block 44. Wherein the acoustic impedance of the mass 44 and/or the locking assembly 42 is greater than the acoustic impedance of the horn 41, and the length of the side of the first connection portion 411 remote from the locking portion 422 to the side of the locking portion 422 remote from the first connection portion 411 is no greater than the wavelength of the ultrasonic vibrations.
The embodiment of the present utility model also proposes an assembly method applied to the transducer 40, the transducer 40 comprising a horn 41, a locking assembly 42, a piezoelectric assembly 43 and a mass 44. The horn 41 includes a first connecting portion 411 and a first fitting portion 412, the first connecting portion 411 being used to connect the waveguide 20 of the ultrasonic surgical instrument 200, the end face of the first fitting portion 412 being provided with a threaded hole in the axial direction of the horn 41. The locking component 42 comprises a columnar second connecting portion 421 and a locking portion 422 arranged at one end of the second connecting portion 421, wherein the maximum outer diameter of the locking portion 422 is larger than that of the second connecting portion 421, a second matching portion 423 is arranged at the other end of the second connecting portion 421, external threads are arranged on the second matching portion 423, and the first matching portion 412 and the second matching portion 423 are connected through threaded holes and external threads in a matching mode. The piezoelectric component 43 is sleeved on the second connecting portion 421 and located between the first matching portion 412 and the locking portion 422, and the piezoelectric component 43 abuts against an end surface of the first matching portion 412. The mass block 44 is sleeved on the second connecting part 421 and is positioned between the piezoelectric component 43 and the locking part 422, and the locking part 422 locks the piezoelectric component 43 between the amplitude transformer 41 and the locking part 422 through the mass block 44; wherein, the assembly method includes:
the limiting mass 44 rotates around the second connecting portion 421;
the locking assembly 42 is driven to move, the locking part 422 pushes the mass block 44 to move towards the first matching part 412, and the locking part 422, the mass block 44 and the first matching part 412 are matched together to lock the piezoelectric assembly 43 together, wherein the mass block 44 and the piezoelectric assembly 43 are kept relatively static.
In the assembly method provided in the embodiment, in the process of driving the locking portion 422 to push the mass block 44 to move towards the first matching portion 412, by limiting the mass block 44 to rotate around the second connecting portion 421, the mass block 44 can be prevented from driving the piezoelectric element 431 close to the mass block 44 to rotate, so that the wire connection of the adjacent piezoelectric element 431 is prevented from breaking during piezoelectric assembly. It will be appreciated that if the piezoelectric element 431 adjacent to the mass 44 rotates, then relative rotation between the piezoelectric element 431 and the piezoelectric element 431 adjacent to the piezoelectric element 431 occurs, resulting in a break in the connection between the piezoelectric elements 431.
In some embodiments, the horn 41 includes an input section 414, the input section 414 abutting the piezoelectric assembly 43, the input section 414 having an outer contour and the piezoelectric assembly 43 having an outer contour that is cylindrical, the input section 414 having an outer diameter that is consistent with the outer diameter of the piezoelectric assembly 43, the method of assembly further comprising, prior to actuating the locking assembly 42 for movement:
the outer side wall of the input section 414 is aligned with the outer side wall of the piezoelectric assembly 43.
As shown in fig. 13, in some embodiments, aligning the outer sidewall of the input section 414 with the outer sidewall of the piezoelectric assembly 43 includes:
s21, providing an auxiliary installation tool, wherein the auxiliary installation tool is provided with a V-shaped surface;
s22, the input section 414 and the piezoelectric assembly 43 are placed on the V-shaped surface such that the outer side wall of the input section 414 is aligned with the outer side wall of the piezoelectric assembly 43.
In this embodiment, the outer side walls of the input section 414 are conveniently aligned with the outer side walls of the piezoelectric assembly 43, which is advantageous for improving the assembly efficiency of the transducer 40. In addition, the alignment method does not need to clamp and fix the piezoelectric component 43, and it is understood that when the piezoelectric element 431 is made of a piezoelectric ceramic sheet, the piezoelectric element 431 is likely to crack due to clamping.
While the utility model has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (19)
1. An ultrasonic surgical instrument comprising an end effector disposed at a distal end of a waveguide rod, a handle assembly, and a transducer cooperatively mounted with the handle assembly and coupled to a proximal end of the waveguide rod for generating ultrasonic vibrations that can be transmitted to the end effector via the waveguide rod, wherein the transducer comprises:
a horn including a first connection portion and a first mating portion, the first connection portion being for connecting the waveguide rod;
the locking assembly comprises a columnar second connecting part and a locking part arranged at one end of the second connecting part, the maximum outer diameter of the locking part is larger than that of the second connecting part, a second matching part is arranged at the other end of the second connecting part, and the second matching part is used for being matched and connected with the first matching part;
the piezoelectric component is sleeved on the second connecting part and positioned between the first matching part and the locking part, and is abutted against the end face of the first matching part;
the mass block is sleeved on the second connecting part and positioned between the piezoelectric component and the locking part, and the locking part locks the piezoelectric component between the amplitude transformer and the locking part through the mass block;
the acoustic impedance of the mass block and/or the locking component is larger than that of the amplitude transformer, and the distance from one side of the first connecting portion away from the locking portion to one side of the locking portion away from the first connecting portion is not larger than the wavelength of ultrasonic vibration.
2. The ultrasonic surgical instrument of claim 1, wherein the mass comprises a first end face and a second end face opposite the first end face, the first end face of the mass abutting the piezoelectric assembly, the second end face of the mass abutting the locking portion;
the area of the second end face of the mass block is smaller than that of the first end face of the mass block.
3. The ultrasonic surgical instrument of claim 2, wherein a projected profile of the second end face along the axial direction of the mass is within a profile of the first end face, the longitudinal cross-sectional profile of the mass including a first side line extending from the first end face along the axial direction of the mass toward the second end face and a second side line extending obliquely from the first side line to the second end face; or,
the projection profile of the second end face along the axial direction of the mass block is located in the profile of the first end face, the longitudinal section profile of the mass block comprises a third side line, a fourth side line and a fifth side line, the third side line extends from the first end face along the axial direction of the mass block towards the second end face, the fourth side line extends from the third side line towards the radial direction of the mass block, and the fifth side line extends from the fourth side line to the second end face along the axial direction of the mass block.
4. The ultrasonic surgical instrument of claim 2, wherein a maximum outer diameter of the mass and a maximum outer diameter of the piezoelectric assembly are coincident.
5. The ultrasonic surgical instrument of claim 2, wherein the second end surface of the mass is a smooth surface and a friction force between the locking portion and the mass is less than a friction force between the mass and the piezoelectric assembly.
6. The ultrasonic surgical device of any one of claims 1-5, wherein a length from a side of the first coupling portion remote from the locking portion to a side of the locking portion remote from the first coupling portion is approximately equal to half a wavelength of the ultrasonic vibrations.
7. The ultrasonic surgical device of claim 6, wherein the transducer has and has only one vibration node located at the horn.
8. The ultrasonic surgical device of claim 7, wherein the horn is provided with a flange portion at the vibration node, the transducer being connected to the handle assembly by the flange portion.
9. The ultrasonic surgical device of claim 8, wherein the horn is separated by the flange portion into an input section and an output section, the input section abutting the piezoelectric assembly, the output section being adapted to be coupled to the waveguide rod.
10. The ultrasonic surgical instrument of claim 9, wherein a maximum outer diameter of the input section and a maximum outer diameter of the piezoelectric assembly are coincident.
11. The ultrasonic surgical instrument of claim 9, wherein the outer contour of the input section and the outer contour of the piezoelectric assembly are both cylindrical.
12. The ultrasonic surgical device of claim 8, wherein the horn is separated by the flange portion into an input section and an output section, the input section abutting the piezoelectric assembly;
the output section comprises a first extension section, a second extension section and a third extension section which are sequentially and coaxially connected, the first extension section is connected with the flange part, the third extension section is connected with the waveguide rod, and the outer diameter of the third extension section is smaller than that of the first extension section;
the profile line of the longitudinal section of the second extension section is a catenary curve.
13. The ultrasonic surgical device of claim 8, wherein the horn is separated by the flange portion into an input section and an output section, the input section abutting the piezoelectric assembly;
the output section comprises a first extension section, a second extension section and a third extension section which are sequentially and coaxially connected, the first extension section is connected with the flange part, the third extension section is connected with the waveguide rod, and the outer diameter of the third extension section is smaller than that of the first extension section;
wherein the ratio of the cross-sectional area of the first extension to the cross-sectional area of the third extension is 5.5-6.5.
14. The ultrasonic surgical device of claim 8, wherein the horn is separated by the flange portion into an input section and an output section, the input section abutting the piezoelectric assembly;
the output section comprises a first extension section, a second extension section and a third extension section which are sequentially and coaxially connected, the first extension section is connected with the flange part, the third extension section is connected with the waveguide rod, and the outer diameter of the third extension section is smaller than that of the first extension section;
wherein the ratio of the axial length of the first extension section, the axial length of the second extension section and the axial length of the third extension section is (0.9-1.1): 3.2-3.8): 6.3-7.7.
15. The ultrasonic surgical device of claim 8, wherein a periphery of the flange portion is provided with a plurality of grooves, the plurality of grooves being spaced apart along the periphery of the flange portion.
16. The ultrasonic surgical device of any one of claims 1-5, wherein the piezoelectric assembly comprises four stacked piezoelectric elements; and/or the number of the groups of groups,
the vibration frequency of the piezoelectric component is 45kHz-50kHz.
17. The ultrasonic surgical instrument of any one of claim 1 to 5,
the locking component is a titanium rod or a titanium alloy rod; and/or the number of the groups of groups,
the mass block is a stainless steel mass block or a titanium metal block or a titanium alloy block; and/or the number of the groups of groups,
the amplitude transformer is an aluminum alloy rod.
18. An ultrasonic surgical system, comprising:
a host;
the ultrasonic surgical device of any one of claims 1 to 17;
the host is electrically connected with the transducer, and the host is used for delivering energy to the transducer.
19. A transducer, comprising:
a horn comprising a first connection portion and a first mating portion, the first connection portion being for connection to a waveguide rod of an ultrasonic surgical instrument;
the locking assembly comprises a columnar second connecting part and a locking part arranged at one end of the second connecting part, the maximum outer diameter of the locking part is larger than that of the second connecting part, a second matching part is arranged at the other end of the second connecting part, and the second matching part is used for being matched and connected with the first matching part;
the piezoelectric component is sleeved on the second connecting part and positioned between the first matching part and the locking part, and is abutted against the end face of the first matching part;
the mass block is sleeved on the second connecting part and positioned between the piezoelectric component and the locking part, and the locking part locks the piezoelectric component between the amplitude transformer and the locking part through the mass block;
the acoustic impedance of the mass block and/or the locking component is larger than that of the amplitude transformer, and the length from one side of the first connecting part far away from the locking part to one side of the locking part far away from the first connecting part is not larger than the wavelength of ultrasonic vibration of the transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222944626.0U CN219397467U (en) | 2022-11-03 | 2022-11-03 | Ultrasonic surgical instrument, system and transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222944626.0U CN219397467U (en) | 2022-11-03 | 2022-11-03 | Ultrasonic surgical instrument, system and transducer |
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| Publication Number | Publication Date |
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| CN219397467U true CN219397467U (en) | 2023-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202222944626.0U Active CN219397467U (en) | 2022-11-03 | 2022-11-03 | Ultrasonic surgical instrument, system and transducer |
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| CN (1) | CN219397467U (en) |
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- 2022-11-03 CN CN202222944626.0U patent/CN219397467U/en active Active
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Address after: Building 5, No. 828 Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430206 Patentee after: Wuhan Mindray Biomedical Technology Co.,Ltd. Country or region after: China Patentee after: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. Address before: 430074 floor 3, building B1, zone B, hi tech medical device Park, No. 818, Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province (Wuhan area of free trade zone) Patentee before: Wuhan Mairui Medical Technology Research Institute Co.,Ltd. Country or region before: China Patentee before: SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS Co.,Ltd. |
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