An ultrasonic surgical blade

Abstract

The application discloses an ultrasonic knife rod, which comprises a rod body and an end effector, the rod body is provided with a gain structure and a frequency modulation structure, the effective length of the rod body is an integer multiple of the half wavelength of an amplitude longitudinal wave, and the proximal end face of the rod body is located at an antinode position of the amplitude longitudinal wave; the gain structure comprises a first gain step and a second gain step, the first gain step is located at a first node position of the amplitude longitudinal wave, the second gain step is located at a last node position of the amplitude longitudinal wave, the frequency modulation structure is located between the first gain step and the second gain step, and the frequency modulation structure is located at an antinode position of the amplitude longitudinal wave. The ultrasonic knife rod can make the end effector obtain the maximum amplitude under the action of an ultrasonic transducer, so as to meet the operation requirement.

Description

Technical Field

[0001] This invention relates to a minimally invasive surgical device, and more particularly to an ultrasonic scalpel handle. Background Technology

[0002] In the field of minimally invasive surgery, ultrasonic cutting and hemostasis scalpels are widely used. Compared with other minimally invasive surgical instruments such as high-frequency electrosurgical units, their advantages are that they produce less smoke, provide a clear surgical field, cause less thermal damage, and have the functions of tissue cutting, coagulation and separation. They can also precisely control the cutting and coagulation range.

[0003] Ultrasonic scalpels can be used in laparoscopic and endoscopic surgeries, as well as open surgeries. They can be used in conjunction with other surgical instruments, such as traditional mechanical scalpels and electrosurgical units, or used alone, as they integrate multiple functions including grasping, cutting, slicing, dissection, and hemostasis. Different surgeries require appropriate scalpel lengths to reach the surgical site.

[0004] Different surgical scenarios have different requirements for the length of the ultrasonic scalpel. For example, liver and gallbladder surgery and esophageal surgery require a longer blade to allow the tip to reach the lesion, while neck surgery requires a shorter blade to facilitate the doctor's operation.

[0005] The output amplitude of a transducer is generally only about 20 micrometers, but soft tissue cutting and coagulation generally require an amplitude of about 30 to 100 micrometers. Therefore, an amplitude gain structure needs to be designed in the scalpel structure design to further amplify the amplitude input to the transducer to meet the needs of the surgery. Summary of the Invention

[0006] To address the shortcomings of the prior art, the present invention aims to provide an ultrasonic scalpel handle with a gain structure that ensures the end effector receives maximum amplitude, thereby meeting surgical requirements.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: an ultrasonic scalpel handle, including a handle body and an end effector, wherein the handle body is provided with a gain structure and a frequency modulation structure, the effective length of the handle body is an integer multiple of half the wavelength of the amplitude longitudinal wave, and the proximal end face of the handle body is located at the antinode of the amplitude longitudinal wave.

[0008] The gain structure includes a first gain step and a second gain step. The first gain step is located at the first node of the amplitude longitudinal wave, and the second gain step is located at the last node of the amplitude longitudinal wave. The frequency modulation structure is located between the first gain step and the second gain step, and the frequency modulation structure is located at the antinode of the amplitude longitudinal wave.

[0009] The first gain step has a diameter of D1 at one end near the far end of the tool holder body and a diameter of D2 at the other end, where D1 > D2;

[0010] The second gain step has a diameter of D3 at one end near the proximal end of the tool holder body and a diameter of D2 at the other end, where D2 > D3;

[0011] The diameters are as follows: D1 is 4.47~4.94mm, D2 is 3.26~3.60mm, and D3 is 2.09~2.31mm.

[0012] Optionally, the gain structure is a cone shape.

[0013] Optionally, the frequency modulation structure is a cylinder.

[0014] Optionally, the effective length of the tool holder body is four and a half wavelengths, and three frequency modulation structures are provided, with the three frequency modulation structures located at the antinodes of the amplitude longitudinal wave.

[0015] Optionally, the effective length of the tool holder body is 6.5 wavelengths, and there are 4 frequency modulation structures, which are located at the antinodes of the amplitude longitudinal wave.

[0016] Optionally, the effective length of the tool holder body is 9.5 wavelengths, and the frequency modulation structure is provided with 6, with the 6 frequency modulation structures located at the antinodes of the amplitude longitudinal wave.

[0017] Optionally, the lengths of the three frequency modulation structures distributed from the far end to the near end of the tool holder body are 4.8~5.2mm, 5.0~6.2mm, and 5.0~6.2mm respectively;

[0018] The diameters of the three frequency modulation structures distributed from the far end to the near end of the tool holder body are 2.6~3.0mm, 2.6~3.0mm, and 2.6~3.0mm, respectively.

[0019] Optionally, the lengths of the four frequency modulation structures distributed from the far end to the near end of the tool holder body are 3.8~4.2mm, 3.8~4.2mm, 4.8~5.2mm, and 5.8~6.2mm, respectively.

[0020] The diameters of the four frequency modulation structures distributed from the far end to the near end of the tool holder body are 2.7~3.1mm, 2.7~3.1mm, 2.7~3.1mm, and 2.7~3.1mm, respectively.

[0021] Optionally, the lengths of the six frequency modulation structures distributed from the far end to the near end of the tool holder body are 56~57.2mm, 12.1~12.5mm, 13.6~14mm, 12.8~13.2mm, 12.8~13.2mm, and 44.5~44.9mm, respectively.

[0022] The diameters of the six frequency modulation structures distributed from the far end to the near end of the tool holder body are 2.8~3.2mm, 2.8~3.2mm, 2.6~3.0mm, 2.7~3.1mm, 2.7~3.1mm, and 3.1~3.3mm, respectively.

[0023] By adopting the above technical solution, the ultrasonic scalpel handle of the present invention, through the position setting of the first gain structure and the second gain structure, as well as the thickness of the gain structure, and in conjunction with the position, length and diameter setting of the frequency modulation structure, enables the end effector to obtain the maximum amplitude under the action of the ultrasonic transducer, thereby meeting the surgical requirements. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present invention;

[0026] Figure 3 This is a structural schematic diagram of the third embodiment of the present invention. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] This invention discloses an ultrasonic scalpel handle, which is mounted on the handle of an ultrasonic surgical scalpel and connected to an ultrasonic transducer, allowing the vibration of the ultrasonic transducer to be transmitted to the handle. The ultrasonic scalpel handle of this invention includes a handle body 100 and an end effector 200, the end effector 200 being the tip portion, which directly acts on tissue structures for minimally invasive surgery. The handle body 100 connects the ultrasonic transducer and the end effector 200, allowing the vibration of the ultrasonic transducer to be transmitted to the end effector 200. The handle body 100 also includes a gain structure and a frequency modulation structure 300. The interaction between the gain structure and the frequency modulation structure 300 allows for adjustment of the natural frequency of the handle body 100, thereby increasing the amplitude of the handle body 100 to meet the requirements of ultrasonic surgical scalpel use.

[0030] In this invention, the gain structure can be set to a conical shape, while the frequency modulation structure 300 is cylindrical.

[0031] In this invention, the length of the ultrasonic scalpel's shank body 100 is limited; its effective length is an integer multiple of half the wavelength of the longitudinal wave, and the proximal end face of the shank body 100 is located at the antinode of the longitudinal wave. It should be noted that the proximal end face of the shank body 100 refers to the end connected to the end effector 200.

[0032] In this invention, the gain structure includes a first gain step T1 and a second gain step T2, wherein the first gain step T1 is located at the first node of the amplitude longitudinal wave, the second gain step T2 is located at the last node of the amplitude longitudinal wave, and the frequency modulation structure 300 is located between the first gain step T1 and the second gain step T2, and the frequency modulation structure 300 is located at the antinode of the amplitude longitudinal wave.

[0033] In one embodiment of the present invention, the diameter of the first gain step T1 near the distal end of the tool holder body 100 is set to D1, and the diameter of the other end is set to D2, with D1 > D2; the diameter of the second gain step T2 near the proximal end of the tool holder body 100 is set to D3, and the diameter of the other end is set to D2, with D2 > D3. D1 is 4.47~4.94mm, D2 is 3.26~3.60mm, and D3 is 2.09~2.31mm. It should be noted that the proximal end of the tool holder body 100 is the end connected to the end effector 200, and correspondingly, the other end is the distal end.

[0034] In the first embodiment of the present invention, as Figure 1 As shown, the effective length of the tool holder body 100 is set to four and a half wavelengths, that is, the effective length of the tool holder body 100 is 179~186mm. In this tool holder body 100, there are three frequency modulation structures 300, and these three frequency modulation structures 300 are located at the antinodes of the longitudinal wave amplitude. The lengths of the three frequency modulation structures 300 distributed from the far end to the near end of the tool holder body 100 are 4.8~5.2mm, 5.0~6.2mm, and 5.0~6.2mm, respectively. The diameters of the three frequency modulation structures 300 distributed from the far end to the near end of the tool holder body 100 are 2.6~3.0mm, 2.6~3.0mm, and 2.6~3.0mm, respectively.

[0035] In the second embodiment of the present invention, as Figure 2As shown, the effective length of the tool holder body 100 is set to six and a half wavelengths, that is, the effective length of the tool holder body 100 is 267~275mm. In this tool holder body 100, there are four frequency modulation structures 300, and these four frequency modulation structures 300 are located at the antinodes of the longitudinal wave amplitude. The lengths of the four frequency modulation structures 300 distributed from the far end to the near end of the tool holder body 100 are 3.8~4.2mm, 3.8~4.2mm, 4.8~5.2mm, and 5.8~6.2mm, respectively. The diameters of the four frequency modulation structures 300 distributed from the far end to the near end of the tool holder body 100 are 2.7~3.1mm, 2.7~3.1mm, 2.7~3.1mm, and 2.7~3.1mm, respectively.

[0036] In the third embodiment of the present invention, as Figure 3 As shown, the effective length of the tool holder body 100 is set to nine and a half wavelengths, that is, the effective length of the tool holder body 100 is 400.5~404mm. In this tool holder body 100, there are six frequency modulation structures 300, and these six frequency modulation structures 300 are located at the antinodes of the longitudinal wave amplitude. The lengths of the six frequency modulation structures 300 distributed from the far end to the near end of the tool holder body 100 are 56~57.2mm, 12.1~12.5mm, 13.6~14mm, 12.8~13.2mm, 12.8~13.2mm, and 44.5~44.9mm, respectively. The diameters of the six frequency modulation structures 300 distributed from the far end to the near end of the tool holder body 100 are 2.8~3.2mm, 2.8~3.2mm, 2.6~3.0mm, 2.7~3.1mm, 2.7~3.1mm, and 3.1~3.3mm, respectively.

[0037] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

[0038] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this invention, the other technical features will not be described in detail here.

Claims

1. An ultrasonic blade, comprising: The device includes a tool holder body and an end effector. The tool holder body has a gain structure and a frequency modulation structure. The effective length of the tool holder body is an integer multiple of half the wavelength of the longitudinal wave, and the proximal end face of the tool holder body is located at the antinode of the longitudinal wave. The gain structure includes a first gain step and a second gain step. The first gain step is located at the first node of the amplitude longitudinal wave, and the second gain step is located at the last node of the amplitude longitudinal wave. The frequency modulation structure is located between the first gain step and the second gain step, and the frequency modulation structure is located at the antinode of the amplitude longitudinal wave. The first gain step has a diameter of D1 at one end near the far end of the tool holder body and a diameter of D2 at the other end, where D1 > D2; The second gain step has a diameter of D3 at one end near the proximal end of the tool holder body and a diameter of D2 at the other end, where D2 > D3; The diameters are as follows: D1 is 4.47~4.94mm, D2 is 3.26~3.60mm, and D3 is 2.09~2.31mm.

2. The ultrasonic scalpel holder according to claim 1, characterized in that, The gain structure is a cone shape.

3. The ultrasonic scalpel holder according to claim 2, characterized in that, The frequency modulation structure is a cylinder.

4. The ultrasonic scalpel holder according to claim 3, characterized in that, The effective length of the tool holder body is 4.5 wavelengths, and there are 3 frequency modulation structures, which are located at the antinodes of the longitudinal wave amplitude.

5. The ultrasonic scalpel holder according to claim 3, characterized in that, The effective length of the tool holder body is 6.5 wavelengths, and there are 4 frequency modulation structures, which are located at the antinodes of the longitudinal wave amplitude.

6. The ultrasonic scalpel holder according to claim 3, characterized in that, The effective length of the tool holder body is 9.5 wavelengths, and there are 6 frequency modulation structures, which are located at the antinodes of the amplitude longitudinal wave.

7. The ultrasonic scalpel holder according to claim 4, characterized in that, The lengths of the three frequency modulation structures distributed from the far end to the near end of the tool holder body are 4.8~5.2mm, 5.0~6.2mm, and 5.0~6.2mm, respectively. The diameters of the three frequency modulation structures distributed from the far end to the near end of the tool holder body are 2.6~3.0mm, 2.6~3.0mm, and 2.6~3.0mm, respectively.

8. The ultrasonic scalpel holder according to claim 5, characterized in that, The lengths of the four frequency modulation structures distributed from the far end to the near end of the tool holder body are 3.8~4.2mm, 3.8~4.2mm, 4.8~5.2mm, and 5.8~6.2mm, respectively. The diameters of the four frequency modulation structures distributed from the far end to the near end of the tool holder body are 2.7~3.1mm, 2.7~3.1mm, 2.7~3.1mm, and 2.7~3.1mm, respectively.

9. The ultrasonic scalpel holder according to claim 6, characterized in that, The lengths of the six frequency modulation structures distributed from the far end to the near end of the tool holder body are 56~57.2mm, 12.1~12.5mm, 13.6~14mm, 12.8~13.2mm, 12.8~13.2mm, and 44.5~44.9mm, respectively. The diameters of the six frequency modulation structures distributed from the far end to the near end of the tool holder body are 2.8~3.2mm, 2.8~3.2mm, 2.6~3.0mm, 2.7~3.1mm, 2.7~3.1mm, and 3.1~3.3mm, respectively.

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