Long-size ultrasonic scalpel

Abstract

According to the long-size ultrasonic scalpel, through special setting of all key size parameters of the ultrasonic scalpel and re-reasonable distribution of the quality of a scalpel head and a scalpel rod, modal separation of the overall structure of the ultrasonic scalpel is functionally achieved, and therefore the energy output efficiency of the long-size ultrasonic scalpel is improved, and the fatigue life of the long-size ultrasonic scalpel is prolonged; special parameterization setting is adopted for the curved surface form and position of the tool bit, longitudinal-bending vibration coupling is reduced, and the problems of dynamic stress concentration, longitudinal vibration frequency deviation and the like are effectively solved.

Description

Technical Field

[0001] The invention relates to the technical field of medical instruments, and in particular to a long-sized ultrasonic scalpel. Background Art

[0002] Ultrasonic scalpels have been widely used in almost all surgical fields in general surgery, cardiac surgery, urology, thoracic surgery, head and neck surgery and other branches of medicine due to their many advantages such as high cutting efficiency, good flexibility, less bleeding, smoke-free operation, few side effects and fast postoperative recovery. It has been proven to be an effective alternative to traditional electric knives and has shown excellent surgical results in clinical practice. Taking the comparative study of ultrasonic scalpels and traditional cold steel knives in the treatment of human canine teeth as an example, although the cutting speed of ultrasonic scalpels is relatively slow, its excellent hemostatic performance significantly reduces the hemostatic steps during the operation, thereby shortening the overall operation time compared to traditional cold steel knife surgery, and the postoperative recovery effect is better. In addition, from the perspective of economic practicality, ultrasonic scalpels also show obvious advantages over traditional surgical techniques.

[0003] The ultrasonic surgical blade and blade rod are the direct execution structures for cutting biological tissues. The rationality of their structural design will directly affect the performance parameters of the ultrasonic surgical blade, such as resonant frequency, amplitude, service life, dynamic resistance, and mechanical quality factor. In the actual application of ultrasonic surgical blades, the existing ultrasonic surgical blade rods on the market are prone to problems such as blade breakage, longitudinal-bending vibration coupling, dynamic stress concentration, and longitudinal vibration frequency deviation, which seriously restrict the working performance of ultrasonic surgical blades. Summary of the invention

[0004] The present invention realizes the modal separation of the overall structure of the ultrasonic knife through specific structural design and reasonable planning of the knife rod quality, thereby improving its energy output efficiency and fatigue life; through the length design and diameter distribution of each section of the knife rod, its segmented mass is adjusted, thereby suppressing the bending mode of the ultrasonic knife rod, separating the coupling mode, and improving its longitudinal vibration performance.

[0005] To achieve the above-mentioned object, the present invention provides a long-sized ultrasonic surgical knife, comprising a knife head and a knife rod connected thereto; the knife head is a crescent-shaped hyperboloid structure, comprising a first curved surface and a second curved surface, the first curved surface and the second curved surface are arranged in close contact, and the length of the first curved surface is longer than that of the second curved surface; the axial length of the knife head is L 1 , the length of the pin section is L 2 The length of the transition section is L 3 The length of the connector is L 4 ; Working section length is L 5; The diameter of the pin shaft section is D 2 ; Pin width is D 1 ; The connector diameter is D 3 ; The width of the extended tip is D 4 ; The width at the tip is D 5 ; The blade angle is α , the knife side angle in the sagittal plane is β ; Its geometric parameters conform to the following function formula: L 2 : L 3 : L 4 : L 5 =7± k 1 :11± k 1 :11± k 1 :32± k 1 ; L 1 tan β= ( D 1 +D 2 ) / 2; ( D 2 - D 3 ) / 2 L 3 = 0.2; D 4 2 +D 5 2 = ( L 4 +L 5 )sin α ; in k 1 is the length gain coefficient, k 1 ∈(0,2) ；L 1 ∈(25,35)；α ∈(8,12) ；β ∈(4,6).

[0006] Preferably, the pin width D 1 Length of pin L 2 Similarly, a notch is provided on the pin shaft segment, and the notch is located on the symmetric plane of the first curved surface.

[0007] As a preferred method, the first curved surface is divided into regions, with the tool tip as the starting point. C 1 、C 2 、C 3 、C 4 、C 5 Segment; establish each section parallel to the horizontal plane, and cut the surface S There are 5 arcs, and the angles between the connecting lines on both sides of each arc are defined as φ 1 ,φ 2 ,φ 3 ,φ 4 , φ 5 , which conforms to the following functional relationship: φ 3 :( φ 2 +φ 4 ) / 2:( φ 1 +φ 5 ) / 2 = 125:125+ k 2 :125+( k 2 +10); in k 2 is the angle gain coefficient, k 2 ∈(2,7); φ 1 ∈(124,126); C 1 : C 2 : C 3 : C4 : C 5 =4:5:5:4:12.

[0008] Preferably, the total length of the cutter head is 28-32 mm.

[0009] Preferably, the tool rod is divided into a thick shaft section, a thin shaft section and a constitutive section along the axial length, and are arranged in sequence with different diameters based on the optimal modal response. The diameter of the thick shaft section is 3.4±0.1mm; the diameter of the thin shaft section is 3.2±0.2mm, and the thick shaft section and the thin shaft section are alternately arranged.

[0010] As a preference, the shank is divided into H 2 - H 10 There are 10 sections in total, including H 2 、H 4 、H 6 and H 8 For the thick shaft section, H 3 、H 5 and H 7 For the thin shaft segment, H 9 is the main segment; H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8 , H 9 、H 10 The length ratio is: 23+ k 3 :18+ k 3 :27+ k 3 :16+ k 3 :6+ k 3 :13+ k 3 :9+ k 3 :222+k 3 :40+ k 3 ; The total length of the horn can be 360+ k 4 mm, where k 3 , k 4 is the robustness factor related to the axial length of the horn, k 3 ∈(-2,2), k 4 ∈(-10,15).

[0011] As a preference, the shank is divided into H 2 -H 10 There are 10 sections in total, including H 2 , H 4 , H 6 and H 8 For the thick shaft section, H 3 , H 5 and H 7 For the thin shaft segment, H 9 is the main segment; H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8 , H 9 、H 10 The ratio of the lengths can be: 23+ k 3 :18+ k 3 :27+ k 3 :16+ k 3 :6+ k 3 :13+ k 3 :9+k 3 :222+ k 3 :40+ k 3 ; The total length of the horn is 450+ k 4 mm.

[0012] As a preference, the shank is divided into H 2 - H 10 There are 10 sections in total, including H 2 、H 4 、H 6 and H 8 For the thick shaft section, H 3 、H 5 and H 7 For the thin shaft segment, H 9 is the main segment; H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8 , H 9 、H 10 The length ratio can be: 23+ k 3 :3+ k 3 :47+ k 3 :3+ k 3 :0:0:0:43+ k 3 :35+ k 3 ; The total length of the horn is 140+ k 4 mm.

[0013] As a preference, the shank is divided into H 2-H 10 There are 10 sections in total, including H 2 、H 4 、H 6 and H 8 For the thick shaft section, H 3 , H 5 and H 7 For the thin shaft segment, H 9 is the main segment; H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8 、H 9 、H 10 The length ratio can be: 23+ k 3 :8+ k 3 :35+ k 3 :10+ k 3 :0:0:0:130+ k 3 :35+ k 3 ; The total length of the horn is 230+ k 4 mm.

[0014] In the technical solution of the present invention, this application changes the mass distribution of the blade head and the blade rod by adopting a special length setting for the entire ultrasonic surgical knife, thereby achieving modal separation of the overall structure of the ultrasonic knife, thereby improving its energy output efficiency and fatigue life; a special length is set for the curved surface position of the blade head to reduce longitudinal-bending vibration coupling, effectively solving problems such as dynamic stress concentration and longitudinal vibration frequency deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The figure shows the orthogonal description surfaces defined by the ultrasonic blade head of the present invention; Figure 2The figure shows the axial parameters of the coronal structure of the ultrasonic blade of the present invention; Figure 3 Shown are other parameters of the coronal structure diagram of the ultrasonic blade of the present invention; Figure 4 Shown are the sagittal structural parameters of the ultrasonic blade of the present invention; Figure 5 The ultrasonic cutter head of the present invention is shown to divide each plane based on distance; Figure 6 The figure shows the tangent angles of each intersection curve defined by the ultrasonic cutter head of the present invention; Figure 7 The diagram shows the structure of the tool bar; Figure 8 Another length ratio tool bar structure diagram is shown; Fig. 9 Shown is another tool bar structure diagram; Fig.10 Shown is another tool bar structure diagram. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] Please refer to the attached Figure 1-Figure 10The present application discloses a long ultrasonic surgical knife, comprising a knife head and a knife rod connected thereto; the knife head is a crescent-shaped hyperboloid structure, comprising a first curved surface and a second curved surface, the first curved surface and the second curved surface are arranged in close contact, and the length of the first curved surface is longer than that of the second curved surface; the axial length of the knife head is L 1 , the length of the pin section is L 2 The length of the transition section is L 3 The length of the connector is L 4 ; Working section length is L 5 ; The diameter of the pin shaft section is D 2 ; Pin width is D 1 ; The connector diameter is D 3 ; The width of the extended tip is D 4 ; The width at the tip is D 5 ; The blade angle is α , the knife side angle in the sagittal plane is β ; Its geometric parameters conform to the following function formula, L 2 : L 3 : L 4 : L 5 = 7± k 1 :11± k 1 :11± k 1 :32± k 1 ; L 1 tan β= ( D 1 +D 2 ) / 2; ( D 2 - D 3 ) / 2 L 3 =0.2; D 42 +D 5 2 = ( L 4 + L 5 )sin α ; in k 1 is the length gain coefficient, k 1 ∈(0,2); L 1 ∈(25,35); α ∈(8,12); β ∈(4,6).

[0020] In the specific implementation process, it is a crescent-shaped hyperboloid structure in the coronal plane view, and is provided with two curved surfaces, so as to achieve surgical cutting with different requirements. In order to avoid the same resonant frequency caused by the same size of the first curved surface and the second curved surface, the first curved surface is specially S The length of the blade is extended to make the resonance frequency different from that of the second curved surface, thereby meeting different cutting requirements. In addition, the blade head is divided into different lengths, which can effectively avoid damage to the blade head while completing ultrasonic surgery.

[0021] Pin width D 1 Length of pin L 2 Similarly, a notch is provided on the pin shaft section, and the notch is located on the symmetric surface of the first curved surface; in this embodiment, by providing a notch and symmetric with the first curved surface S The positions are relatively set, which not only reduces the mass of the ultrasonic knife, but also changes the mass distribution, thereby achieving the effect of improving the longitudinal vibration performance.

[0022] The first surface S Divide the area into C 1 , C 2 , C 3 , C 4 , C 5 Segment; establish each section parallel to the horizontal plane, and cut the surface S There are 5 arcs, and the angles between the connecting lines on both sides of each arc are defined as φ 1 , φ 2 , φ 3 , φ 4 , φ5 , which conforms to the following functional relationship: φ 3 :( φ 2 +φ 4 ) / 2:( φ 1 +φ 5 ) / 2=125:125+ k 2 :125+( k 2 +10); in k 2 is the angle gain coefficient, k 2 ∈(2,7); φ 1 ∈(124,126); C 1 : C 2 : C 3 : C 4 : C 5 =4:5:5:4:12.

[0023] Cutting head H 1 The total length is 28-32mm, preferably 30mm; the arbor is divided into a thick shaft section, a thin shaft section and a constitutive section along the axial length, and are arranged in sequence with different diameters based on the optimal modal response. The diameter of the thick shaft section is 3.4±0.1mm; the diameter of the thin shaft section is 3.2±0.2mm, and the thick shaft section and the thin shaft section are arranged alternately.

[0024] In the specific implementation process, the shank part can be designed in a variety of ways: Solution 1: Divide the tool bar into H 2 -H 10 There are 10 sections in total, including H 2 , H 4 , H 6 and H 8 For the thick shaft section, H 3 , H 5 and H 7For the thin shaft segment, H 9 is the main segment; H 2 , H 3 , H 4 , H 5 , H 6 , H 7 , H 8 , H 9 , H 10 The length ratio is: 23+ k 3 :18+ k 3 :27+ k 3 :16+ k 3 :6+ k 3 :13+ k 3 :9+ k 3 :222+ k 3 :40+ k 3 ; The total length of the horn can be 360+ k 4 mm, where k 3 , k 4 is the robustness factor related to the axial length of the horn, k 3 ∈(-2,2), k 4 ∈(-10,15).

[0025] Solution 2: Divide the tool bar into H 2 - H 10 There are 10 sections in total, including H 2 , H 4 , H 6 and H 8 For the thick shaft section, H 3 , H 5 andH 7 For the thin shaft segment, H 9 is the main segment; H 2 , H 3 , H 4 , H 5 , H 6 , H 7 , H 8 , H 9 , H 10 The length ratio can be: 23+ k 3 :18+ k 3 :27+ k 3 :16+ k 3 :6+ k 3 :13+ k 3 :9+ k 3 :222 +k 3 :40+ k 3 ; The total length of the horn is 450+ k 4 mm.

[0026] Solution 3: Divide the tool bar into H 2 - H 10 There are 10 sections in total, including H 2 , H 4 , H 6 and H 8 For the thick shaft section, H 3 , H 5 and H 7 For the thin shaft segment, H 9 is the main segment; H 2 , H 3 ,H 4 , H 5 , H 6 , H 7 , H 8 , H 9 , H 10 The length ratio can be: 23+ k 3 :3+ k 3 :47+ k 3 :3+ k 3 :0:0:0:43+ k 3 :35+ k 3 ; The total length of the horn is 140+ k 4 mm.

[0027] Solution 4: Divide the tool bar into H 2 -H 10 There are 10 sections in total, including H 2 , H 4 , H 6 and H 8 For the thick shaft section, H 3 , H 5 and H 7 For the thin shaft segment, H 9 This segment ；H 2 , H 3 , H 4 , H 5 , H 6 , H 7 , H 8 , H 9 , H 10 The length ratio can be: 23+k 3 :8+ k 3 :35+ k 3 :10+ k 3 :0:0:0:130+ k 3 :35+ k 3 ; The total length of the horn is 230+ k 4 mm.

[0028] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A long ultrasonic surgical knife, characterized in that: The invention comprises a cutter head and a cutter rod connected thereto; the cutter head is a crescent-shaped hyperboloid structure, comprising a first curved surface and a second curved surface, the first curved surface and the second curved surface are arranged in close contact, and the length of the first curved surface is longer than that of the second curved surface; the axial length of the cutter head is L 1. The length of the pin section is L 2; the length of the transition section is L 3; the length of the connector is L 4; Working section length is L 5; The diameter of the pin shaft section is D 2; Pin width is D 1; the connector diameter is D 3; The width of the extended tip is D 4; The width at the tip of the knife is D 5; The blade angle is α , the knife side angle in the sagittal plane is β ; Its geometric parameters conform to the following function formula: L 2: L 3: L 4: L 5=7± k 1:11 ±k 1:11± k 1:32± k 1； L 1 tan β =( D 1 +D 2) / 2; ( D 2 -D 3) / 2 L 3 = 0.2； D 4 2 +D 5 2 = ( L 4+ L 5)sin α ; in k 1 is the length gain coefficient, k 1∈(0,2); L 1∈(25,35); α ∈(8,12); β ∈(4,6).

2. The long ultrasonic surgical knife according to claim 1, characterized in that: The pin width D 1 and pin length L 2, the pin shaft section is provided with a notch, and the notch is located on the symmetric plane of the first curved surface.

3. The long ultrasonic surgical knife according to claim 1, characterized in that: Divide the first surface into regions, taking the tool tip as the starting point C 1. C 2. C 3. C 4. C 5 segments; establish each section parallel to the horizontal plane and cut the surface S There are 5 arcs, and the angle between the connecting lines on both sides of each arc is defined as φ 1. φ 2. φ 3. φ 4. φ 5, which conforms to the following functional relationship: φ 3:( φ 2+ φ 4) / 2:( φ 1+ φ 5) / 2 = 125:125 +k 2:125 + ( k 2+10)； in k 2 is the angle gain coefficient, k 2∈(2,7); φ 1∈(124,126); C 1: C 2: C 3: C 4: C 5=4:5:5:4:

12.

4. The long ultrasonic surgical knife according to claim 1, characterized in that: The total length of the cutter head is 28-32 mm.

5. The long ultrasonic surgical knife according to claim 1, characterized in that: The tool rod is divided into a thick shaft section, a thin shaft section and a constitutive section along the axial length, and is arranged in sequence with different diameters based on the optimal modal response. The diameter of the thick shaft section is 3.4±0.1mm; the diameter of the thin shaft section is 3.2±0.2mm, and the thick shaft section and the thin shaft section are alternately arranged.

6. The long ultrasonic surgical knife according to claim 5, characterized in that: Divide the tool bar into H 2- H 10 There are 10 sections in total, including H 2 、H 4 、H 6 and H 8 is the thick shaft section, H 3 、H 5 and H 7 is a thin shaft segment, H 9 is the main segment; H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8. H 9 、H 10 The length ratio is: 23+ k 3:18+ k 3:27+ k 3:16+ k 3:6+ k 3:13+ k 3:9+ k 3:222+ k 3:40+ k 3; The total length of the horn can be 360+ k 4mm, of which k 3. k 4 is the robustness factor related to the axial length of the horn, k 3∈(-2,2), k 4∈(-10,15).

7. The long ultrasonic surgical knife according to claim 5, characterized in that: Divide the tool bar into H 2- H 10 There are 10 sections in total, including H 2. H 4. H 6 and H 8 is the thick shaft section, H 3. H 5 and H 7 is a thin shaft segment, H 9 is the constitutive segment; H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8. H 9 、H 10 The length ratio can be: 23+ k 3:18+ k 3:27+ k 3:16+ k 3:6+ k 3:13+ k 3:9+ k 3:222+ k 3:40+ k 3; The total length of the horn is 450+ k 4mm.

8. The long ultrasonic surgical knife according to claim 5, characterized in that: Divide the tool bar into H 2- H 10 There are 10 sections in total, including H 2 、H 4 、H 6 and H 8 is the thick shaft section, H 3 、H 5 and H 7 is a thin shaft segment, H 9 is the main segment; H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8. H 9 、H 10 The length ratio can be: 23+ k 3:3+ k 3:47+ k 3:3+ k 3:0:0:0:43+ k 3:35+ k 3; The total length of the horn is 140+ k 4mm.

9. The long ultrasonic surgical knife according to claim 5, characterized in that: Divide the tool bar into H 2 -H 10 There are 10 sections in total, including H 2 、H 4 、H 6 and H 8 is the thick shaft section, H 3. H 5 and H 7 is a thin shaft segment, H 9 is the constitutive segment H 2 、H 3 、H 4 、H 5 、H 6 、H 7 、H 8. H 9 、H 10 The length ratio can be: 23+ k 3:8+ k 3:35+ k 3:10+ k 3:0:0:0:130+ k 3:35+ k 3; The total length of the horn is 230+ k 4mm.

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