Waveguide rod for an ultrasonic scalpel

Abstract

The utility model discloses an ultrasonic scalpel's waveguide pole, related to surgical instrument technical field, this ultrasonic scalpel's waveguide pole includes proximal end connecting portion, diameter range is 4.00mm~4.70mm, proximal end connecting portion is equipped with pin hole, extension, diameter range is 2.90mm~3.40mm, distal end connecting portion, the maximum outer diameter is 4.00mm, the extension is connected with proximal end connecting portion, distal end connecting portion respectively, and the junction is all smooth transition, wherein, on the central axis of waveguide pole, the distance from the center point of pin hole to the most distal end of distal end connecting portion is less than or equal to 383.74 millimeters. Can effectively reduce the energy loss in waveguide transmission process, obtains the effect that ultrasonic energy is stably, efficiently transmitted to cutting site.

Description

Technical Field

[0001] This utility model relates to the field of surgical instrument technology, and in particular to a waveguide rod for an ultrasonic scalpel. Background Technology

[0002] In modern surgical medicine, ultrasonic scalpels have become essential tools for surgery due to their efficient and precise cutting and coagulation functions. However, existing ultrasonic scalpel handles face numerous technical bottlenecks in practical use. When receiving longitudinally vibrating ultrasonic waves, the ultrasonic scalpel handle is highly susceptible to interference from other ultrasonic clutter generated by the environment or the equipment itself. This clutter superimposes on or interferes with the target ultrasonic waves, not only altering the scalpel handle's vibration frequency and amplitude, affecting normal operation, but also potentially leading to localized stress concentration. Over long-term use, this accelerates fatigue damage, shortens its lifespan, and increases maintenance costs and surgical risks.

[0003] Therefore, it is evident that the structural dimensions of the ultrasonic scalpel handle play a decisive role in its performance. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is that the ultrasonic scalpel shaft suffers from large energy loss during waveguide transmission when receiving longitudinally vibrating ultrasonic waves.

[0005] To address the aforementioned problems, this utility model discloses a waveguide rod for an ultrasonic surgical scalpel. It effectively reduces energy loss during waveguide transmission, achieving stable and efficient transmission of ultrasonic energy to the cutting area.

[0006] This utility model provides a waveguide rod for an ultrasonic scalpel. The waveguide rod includes a proximal connecting portion with a diameter ranging from 4.00 mm to 4.70 mm, and the proximal connecting portion is provided with a pin hole; an extension portion with a diameter ranging from 2.90 mm to 3.40 mm; and a distal connecting portion with a maximum outer diameter of 4.00 mm. The extension portion is connected to the proximal connecting portion and the distal connecting portion respectively, and the connection points are all smoothly transitioned. The distance from the center point of the pin hole to the farthest point of the distal connecting portion on the central axis of the waveguide rod is less than or equal to 383.74 mm.

[0007] A further technical solution is that the overall length of the waveguide rod is less than or equal to 402.72 mm.

[0008] A further technical solution is that the extension includes a first diameter portion and a second diameter portion, the diameter of the first diameter portion is larger than the diameter of the second diameter portion, and the connection between the first diameter portion and the second diameter portion is a smooth transition.

[0009] A further technical solution is that the number of the first diameter portions is equal to the number of the second diameter portions, and the first diameter portions and the second diameter portions are alternately arranged.

[0010] A further technical solution is that the distal connection portion includes a columnar portion and a flat portion, the columnar portion is connected to the extension portion and the flat portion respectively, and the connection is a smooth transition, and the flat portion bends upward from the columnar portion.

[0011] A further technical solution is that the flat portion bends upward from the columnar portion to form an arc, and the radius of the arc is 16mm.

[0012] A further technical solution is that the flat portion has a notch along its central axis.

[0013] A further technical solution is that the remote connection portion is provided with at least one isolation member, and the outer diameter of the isolation member is greater than 4.00 mm.

[0014] A further technical solution is that the isolation component is made of insulating and heat-insulating material.

[0015] A further technical solution is that the diameter error range of the waveguide rod is ±0.02mm.

[0016] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include:

[0017] By optimizing the structure of the waveguide rod, energy loss during waveguide transmission can be effectively reduced, ensuring that ultrasonic energy is transmitted stably and efficiently to the cutting site. At the same time, by rationally adjusting the size and shape of the cutting kerf, the contact area with biological tissue can be increased, thereby significantly improving the precision and efficiency of surgical cutting and providing safer and more reliable technical support for surgical procedures. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the waveguide rod structure of an ultrasonic surgical scalpel according to the present invention;

[0020] Figure 2 This is a schematic diagram of another waveguide rod structure for an ultrasonic surgical knife according to this utility model;

[0021] Figure 3 This is a partial structural diagram of the waveguide rod of an ultrasonic surgical scalpel according to the present invention;

[0022] Figure 4 This is a partial structural diagram of the waveguide rod of another ultrasonic surgical scalpel according to the present invention;

[0023] Figure 5 This is a partial structural diagram of the waveguide rod of another ultrasonic surgical scalpel according to the present invention;

[0024] Figure 6 This is a partial structural diagram of the waveguide rod of another ultrasonic surgical scalpel according to the present invention;

[0025] Figure 7 This is a partial structural diagram of the waveguide rod of another ultrasonic surgical scalpel according to the present invention;

[0026] Figure 8 This is an exemplary schematic diagram showing the shape of the cross-section of the flat portion of this utility model.

[0027] Figure Labels

[0028] 1. Proximal connecting part; 2. Extension part; 3. Distal connecting part; 11. Pin hole;

[0029] 21. First diameter section; 22. Second diameter section;

[0030] 31. Columnar part; 32. Flat part; 33. Notch; 4. Separator. Detailed Implementation

[0031] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0032] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0033] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0034] See Figures 1-8 This utility model provides a waveguide rod for an ultrasonic scalpel. The waveguide rod includes a proximal connecting portion 1 with a diameter ranging from 4.00 mm to 4.70 mm, and a pin hole 11; an extension portion 2 with a diameter ranging from 2.90 mm to 3.40 mm; and a distal connecting portion 3 with a maximum outer diameter of 4.00 mm. The extension portion 2 is connected to both the proximal connecting portion 1 and the distal connecting portion 3, with smooth transitions at the connection points. The distance from the center point of the pin hole 11 to the farthest point of the distal connecting portion 3 on the central axis of the waveguide rod is less than or equal to 383.74 mm. Specific details of each component are as follows:

[0035] In this embodiment, the waveguide rod adopts a segmented structural design: the proximal connection part 1 is matched with the interface of the ultrasonic generator, the pin hole 11 is used for mechanical positioning and torque transmission, the extension part 2 optimizes the ultrasonic transmission efficiency through a variable diameter design, the diameter gradually reduces reflection loss, the distal connection part 3 provides the surgical operation end, and the outer diameter limitation ensures minimally invasiveness.

[0036] Furthermore, the connection points of the segmented structure use rounded or conical transitions (such as R angle ≥ 0.5mm) to reduce stress concentration (stress peak value reduced by more than 30%) and improve fatigue life.

[0037] Furthermore, the distance from the center to the distal end of pin hole 11 is less than or equal to 383.74 mm, ensuring effective coupling between the ultrasonic vibration node and the blade tip, thus avoiding energy attenuation. This dimension balances surgical operating space and ultrasonic vibration wavelength matching (the wavelength of ultrasound in stainless steel is approximately 120 mm, and this length is an integer multiple of half the wavelength plus tolerance).

[0038] The waveguide rod of this ultrasonic surgical scalpel can achieve the following technical effects:

[0039] By optimizing the structure of the waveguide rod, energy loss during waveguide transmission can be effectively reduced, ensuring that ultrasonic energy is transmitted stably and efficiently to the cutting site. At the same time, by rationally adjusting the size and shape of the cutting kerf, the contact area with biological tissue can be increased, thereby significantly improving the precision and efficiency of surgical cutting and providing safer and more reliable technical support for surgical procedures.

[0040] See also Figures 1-8In this embodiment, the overall length of the waveguide rod is less than or equal to 402.72 mm.

[0041] Specifically, the overall length of the waveguide rod is ≤402.72mm. This length is suitable for the access channels of minimally invasive surgical instruments such as laparoscopy (typically, the channel diameter ranges from 5mm to 10mm, and the rod length needs to be less than or equal to 410mm). In this embodiment, the overall length of the waveguide rod is 402.52mm, with an error accuracy range of ±0.2mm.

[0042] Furthermore, the extension portion 2 includes a first diameter portion 21 and a second diameter portion 22, wherein the diameter of the first diameter portion 21 is larger than the diameter of the second diameter portion 22, and the connection between the first diameter portion 21 and the second diameter portion 22 is smoothly transitioned.

[0043] Specifically, the extension 2 is distributed in a multi-segment stepped manner. The first diameter section 21 (a larger diameter section compared to the second diameter section 22) is used to enhance structural stiffness and reduce bending deformation. The second diameter section 22 (a smaller diameter section compared to the first diameter section 21) is used to reduce lateral vibration interference and focus longitudinal vibration energy. The first diameter section 21 and the second diameter section 22 have a smooth transition, using a conical surface with a cone angle of less than or equal to 15° to ensure a gradual change in wave impedance and reduce reflection.

[0044] Furthermore, the number of the first diameter portions 21 is equal to the number of the second diameter portions 22, and the first diameter portions 21 and the second diameter portions 22 are alternately arranged.

[0045] Specifically, alternating equal-diameter sections form a periodic impedance variation structure, similar to an acoustic filter (bandpass frequency range: 40-60kHz, matching the frequency of mainstream ultrasonic surgical scalpels). In this embodiment, as... Figures 1-2 As shown, the total length of the proximal connector 1 is about 32 mm, the extension 2 includes 4 sets of large-diameter segments and 4 sets of small-diameter segments, with a total length of about 320 mm, and the total length of the distal connector 3 is about 50 mm.

[0046] Furthermore, the distal connection portion 3 includes a columnar portion 31 and a flat portion 32. The columnar portion 31 is connected to the extension portion 2 and the flat portion 32 respectively, and the connection is a smooth transition. The flat portion 32 bends upward from the columnar portion 31.

[0047] Specifically, the columnar portion 31 (diameter less than or equal to 4.00 mm; in this embodiment, the diameter of the columnar portion 31 has a tolerance of 4.00 mm ± 0.02 mm) serves as a transition section to maintain the stability of ultrasonic vibration. The flat portion 32 (thickness less than or equal to 1.5 mm) is used to increase the contact area with tissue (compared to a conventional circular cross-section: contact area increased by 40%), improving cutting efficiency (experimental data: cutting speed increased by 25%). The columnar portion 31 and the flat portion 32 are smoothly transitioned, connected by an arc with R ≥ 2 mm (in this embodiment, an arc with R = 4 mm) to avoid fatigue fracture caused by stress concentration.

[0048] Furthermore, the flat portion 32 bends upward from the columnar portion 31 to form an arc, and the radius of the arc is 16mm.

[0049] Specifically, the curvature of the arc, R = 16 mm, meets the requirements of ergonomics and tissue anatomy (e.g., the operating radius of a hemostat is approximately 15-20 mm). This curvature ensures that the refraction angle of ultrasound at the bend is ≤12°, guaranteeing energy loss <8% (theoretical calculation value).

[0050] The flat section 32 adopts an arc curvature of R=16mm, which ensures both the flexibility of surgical operation and the efficiency of ultrasound transmission.

[0051] Furthermore, the flat portion 32 is provided with a notch 33 along its central axis.

[0052] Specifically, such as Figures 6-8 As shown, notch 33 is asymmetrically distributed, forming local stress concentration points and reducing the energy required for cutting.

[0053] Furthermore, the remote connection portion 3 is provided with at least one isolation member 4, the outer diameter of the isolation member 4 being greater than 4.00 mm.

[0054] Specifically, the outer diameter of the spacer 4 is greater than 4.00 mm (typically, the outer diameter of the spacer 4 ranges from 4.5 mm to 6.0 mm), physically isolating non-target tissues to prevent accidental injury. It also forms a heat dissipation zone, reducing the risk of thermal damage. The number of spacers 4 can be configured with multiple levels of isolation according to surgical needs; typically, the distance between two adjacent spacers 4 is 10 mm to 15 mm. The spacer 4 significantly improves surgical safety.

[0055] Furthermore, the isolation component is made of insulating and heat-insulating material.

[0056] Specifically, insulating and heat-insulating materials such as polyetheretherketone (PEEK) and polytetrafluoroethylene (PTFE) effectively block heat transfer and prevent tissue burns caused by current leakage.

[0057] Furthermore, the diameter error range of the waveguide rod is ±0.02mm.

[0058] Specifically, the diameter tolerance is controlled within ±0.02mm to ensure the impedance matching stability of ultrasonic transmission and guarantee the fitting accuracy with the surgical instrument channel. It can be manufactured using precision grinding or CNC turning processes.

[0059] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0065] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0066] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A waveguide rod for an ultrasonic surgical scalpel, characterized in that, include: The proximal connector has a diameter ranging from 4.00 mm to 4.70 mm and is provided with a pin hole. The extension portion has a diameter ranging from 2.90 mm to 3.40 mm; The maximum outer diameter of the distal connector is 4.00 mm; The extended portion is connected to the proximal connecting portion and the distal connecting portion respectively, and the connection points are all smoothly transitioned. Wherein, on the central axis of the waveguide rod, the distance from the center point of the pin hole to the farthest end of the distal connection is less than or equal to 383.74 mm.

2. The waveguide rod of the ultrasonic surgical scalpel according to claim 1, characterized in that, The overall length of the waveguide rod is less than or equal to 402.72 mm.

3. The waveguide rod of the ultrasonic surgical scalpel according to claim 1, characterized in that, The extension includes a first diameter portion and a second diameter portion, the diameter of the first diameter portion is larger than the diameter of the second diameter portion, and the connection between the first diameter portion and the second diameter portion is a smooth transition.

4. The waveguide rod of the ultrasonic surgical scalpel according to claim 3, characterized in that, The number of the first diameter portions is equal to the number of the second diameter portions, and the first diameter portions and the second diameter portions are alternately arranged.

5. The waveguide rod of the ultrasonic surgical scalpel according to claim 1, characterized in that, The distal connection portion includes a columnar portion and a flat portion. The columnar portion is connected to the extension portion and the flat portion respectively, and the connection points are all smooth transitions. The flat portion bends upward from the columnar portion.

6. The waveguide rod of the ultrasonic surgical scalpel according to claim 5, characterized in that, The flat portion bends upward from the columnar portion to form an arc, and the radius of the circle corresponding to the arc is 16mm.

7. The waveguide rod of the ultrasonic scalpel according to claim 5, characterized in that, The flat portion has a notch along its central axis.

8. The waveguide rod of the ultrasonic surgical scalpel according to claim 1, characterized in that, The distal connection portion is provided with at least one isolation member, the outer diameter of which is greater than 4.00 mm.

9. The waveguide rod of the ultrasonic surgical scalpel according to claim 8, characterized in that, The insulating component is made of insulating and heat-resistant material.

10. The waveguide rod of the ultrasonic scalpel according to claim 1, characterized in that, The diameter error range of the waveguide rod is ±0.02mm.

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