An ultrasonic scalpel waveguide rod

Abstract

The application discloses an ultrasonic scalpel waveguide rod, which comprises a scalpel head and a rod body, and the scalpel head comprises an inner arc surface, an outer arc surface, a concave curved surface, a convex curved surface, a coagulation closure surface, a first transition surface and a second transition surface; the inner arc surface and the outer arc surface are oppositely arranged and are in parallel straight lines in the cross section of the scalpel head; the cross section width of the scalpel head refers to the distance between the inner arc surface and the outer arc surface in the cross section of the scalpel head; the cross section width of the scalpel head is smaller in the direction away from the rod body; the concave curved surface and the convex curved surface are adjacently arranged, and the concave curved surface and the convex curved surface are adjacent to the inner arc surface and the outer arc surface respectively; the coagulation closure surface is a plane, and the two sides of the coagulation closure surface are adjacent to the first transition surface and the second transition surface respectively, the first transition surface is adjacent to the inner arc surface, and the second transition surface is adjacent to the outer arc surface. The waveguide rod of the application can achieve better coagulation closure effect when cutting blood vessels and other tissues.

Description

Technical Field

[0001] This invention relates to an ultrasonic surgical scalpel waveguide rod, belonging to the field of ultrasonic scalpel medical device technology. Background Technology

[0002] In laparoscopic surgery, ultrasonic scalpels are used to cut tissue and coagulate blood vessels. To save time, some tiny blood vessels or vascular branches are cut and coagulated along with the tissue. Because the vessels are not fully freed, closure is incomplete, leading to increased bleeding and higher surgical risks. Therefore, improving the effectiveness of ultrasonic scalpels in coagulating blood vessels has always been a pursuit of those skilled in the art. Summary of the Invention

[0003] In order to achieve rapid cutting and coagulation of blood vessels, the present invention provides an ultrasonic surgical scalpel waveguide rod, characterized in that it includes a scalpel head and a rod body, wherein the scalpel head includes an inner arc surface, an outer arc surface, a grooved curved surface, a convex curved surface, a coagulation surface, a first transition surface and a second transition surface;

[0004] The inner arc surface and the outer arc surface are arranged opposite each other, and they are parallel straight lines in the cross-section of the cutter head. The cross-sectional width of the cutter head refers to the distance between the inner arc surface and the outer arc surface in the cross-section of the cutter head. The smaller the cross-sectional width of the cutter head is along the direction away from the rod body, the better.

[0005] The grooved surface and the convex surface are arranged adjacent to each other, and the grooved surface and the convex surface are respectively adjacent to the inner arc surface and the outer arc surface;

[0006] The condensation surface is a plane, and the two sides of the condensation surface are respectively adjacent to the first transition surface and the second transition surface. The first transition surface is adjacent to the inner arc surface, and the second transition surface is adjacent to the outer arc surface.

[0007] The aforementioned blade tip is curved via its inner and outer arc surfaces, with a continuously decreasing cross-sectional width. This curved design facilitates a wider field of view for endoscopic surgery, and reducing the tip thickness decreases tip impedance, thereby reducing harmful non-longitudinal vibrations. Furthermore, it enables focused ultrasound energy at the tip, enhancing its cell-wall breaking ability. The blade's working surface features a uniformly distributed coagulation surface, which effectively improves coagulation capacity. A first and second transition surface are located on either side of the coagulation surface, enabling pre-coagulation and improving coagulation reliability. This uniform coagulation surface results in a more regular cross-section when cutting blood vessels and other tissues, leading to better coagulation outcomes.

[0008] The junction of a grooved surface and a convex surface can form a sharp cutting edge.

[0009] Furthermore, the cutter head is bent along an arc tangent to the centerline of the rod body, the radius of the arc being R; the tip width of the cutter head is b1, the width of the cutter head cross-section at a distance d from the tip is b2, the radius of the inner arc surface is R1, the radius of the outer arc surface is R2, and the width of the sealed surface is a, which needs to satisfy the following relationship:

[0010] b2 = 0.06d + b1,

[0011] R1 = R - b1,

[0012] R2 = R + b1,

[0013] a=0.1b1,

[0014] The values ​​are valid within ±10% fluctuation range. Meeting the above formula can reduce non-longitudinal vibration, better achieve ultrasonic energy focusing, and improve cutting and cell disruption speed.

[0015] Further, the rod body includes a proximal section of the waveguide rod, a distal section of the waveguide rod, and large and small bamboo-joint segments located between the proximal and distal sections of the waveguide rod. The outer diameter of the proximal section of the waveguide rod is D, the outer diameter of the distal section of the waveguide rod is D1, the diameter of the large bamboo-joint segment is D2, the diameter of the small bamboo-joint segment is D3, the length of the proximal section of the waveguide rod is L1, the length of the distal section of the waveguide rod is L2, the length of the large bamboo-joint segment is L3, and the length of the small bamboo-joint segment is L4. The following relationships must be satisfied:

[0016] D:D1=34:25,

[0017] D:D2=36:25

[0018] D:D3 = 8:5

[0019] L1:L2:L3:L4=1:1:1.75:3.25,

[0020] Each value is valid within a range of ±10%. Meeting the above formula helps control the cutter bar frequency within the effective cutting range and the cutter head amplitude to ensure the necessary acceleration for tissue cutting. By adjusting the diameter and length of each part, and adjusting the mass ratio of each segment, and by adjusting the wavelength and mass, the waveguide bar frequency is controlled within 52kHz~58kHz, and the waveguide bar acceleration is controlled within 80000g~100000g (the human soft tissue cutting acceleration threshold is approximately 50000g), enabling rapid cutting of human soft tissue. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of the ultrasonic surgical scalpel waveguide rod of the present invention;

[0022] Figure 2 This is a front view of the ultrasonic surgical scalpel waveguide rod of the present invention;

[0023] Figure 3 This is a top view of the cutting head of the present invention;

[0024] Figure 4 This is a bottom view of the blade head of the present invention;

[0025] Figure 5 This is a cross-sectional view of the cutting head of the present invention;

[0026] Figure 6 This is a schematic diagram showing the dimensions of the waveguide rod of the present invention;

[0027] Figure 7 This is a schematic diagram of the cutter head dimensions;

[0028] Figure 8 This is a schematic diagram showing the dimensions of the cutter head's cross-section;

[0029] Figure 9 This is a comparison chart of burst pressure tests;

[0030] Figure 10 This is a chart showing the comparison of closed time.

[0031] In the diagram: cutter head 1, rod body 2, transition arc 3; inner arc surface 1-1, outer arc surface 1-2, groove surface 1-3, condensation surface 1-4, convex surface 1-5, first transition surface 1-6, second transition surface 1-7, waveguide rod proximal section 2-1, waveguide rod large section bamboo joint 2-2, waveguide rod small section bamboo joint 2-3, waveguide rod distal section 2-4. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to embodiments.

[0033] like Figures 1 to 8 As shown in the figure, this embodiment provides an ultrasonic surgical scalpel waveguide rod, including a scalpel head 1 and a rod body 2, which are connected by a transition arc 3.

[0034] Specifically, the cutter head 1 is bent along an arc tangent to the center line of the rod body 2, and the radius of the arc is R. The cutter head 1 includes an inner arc surface 1-1, an outer arc surface 1-2, a groove surface 1-3, a convex surface 1-5, a solidified surface 1-4, a first transition surface 1-6, and a second transition surface 1-7.

[0035] The inner arc surface 1-1 and the outer arc surface 1-2 are arranged opposite each other, and they are parallel straight lines in the cross section of the cutter head 1. The cross section width of the cutter head refers to the distance between the inner arc surface 1-1 and the outer arc surface 1-2 in the cross section of the cutter head. The smaller the cross section width of the cutter head 1 along the direction away from the rod body 2, that is, the smaller the tip width of the cutter head 1.

[0036] The grooved surface 1-3 and the convex surface 1-5 are arranged adjacent to each other, and the grooved surface 1-3 and the convex surface 1-5 are respectively adjacent to the inner arc surface 1-1 and the outer arc surface 1-2;

[0037] The coagulation surface 1-4 is a plane. The two sides of the coagulation surface 1-4 are adjacent to the first transition surface 1-6 and the second transition surface 1-7, respectively. The first transition surface 1-6 is adjacent to the inner arc surface 1-1, and the second transition surface 1-7 is adjacent to the outer arc surface 1-2. In actual use, the coagulation surface 1-4 and the clamping arm of the ultrasonic scalpel together clamp the human tissue.

[0038] The tip width of the cutter head is b1, the width of the cutter head cross-section at a distance d from the tip is b2, the radius of the inner arc surface is R1, the radius of the outer arc surface is R2, and the width of the solidification surface is a. The following relationships must be satisfied:

[0039] b2 = 0.06d + b1;

[0040] R1 = R - b1;

[0041] R2 = R + b1;

[0042] a=0.1b1;

[0043] The values ​​are valid within a range of ±10%.

[0044] Preferably, the radius R of the arc tangent to the centerline of the rod 2 is 27-33 mm, more preferably 30 mm; preferably, the width b1 of the blade tip section is 0.95-1.15 mm, more preferably 1.05 mm; the width b2 of the section at a distance d from the tip of 10 mm is 1.50-1.80 mm, more preferably 1.65 mm; preferably, the radius R1 of the inner arc surface is 26-32 mm, more preferably 29 mm; the radius R2 of the outer arc surface is 28-34 mm, more preferably 31 mm; and the width a of the sealed surface is 0.09-0.11 mm, more preferably 0.1 mm.

[0045] Specifically, the rod body includes a proximal segment 2-1, a distal segment 2-4, and two segments located between the proximal and distal segments 2-1 and 2-4: a large segment 2-2 and a small segment 2-3. The outer diameter of the proximal segment 2-1 is D, the outer diameter of the distal segment 2-4 is D1, the diameter of the large segment 2-2 is D2, the diameter of the small segment 2-3 is D3, the length of the proximal segment 2-1 is L1, the length of the distal segment 2-4 is L2, the length of the large segment 2-2 is L3, and the length of the small segment 2-3 is L4. The following relationships must be satisfied:

[0046] D:D1=34:25,

[0047] D:D2=36:25;

[0048] D:D3 = 8:5

[0049] L1:L2:L3:L4=1:1:1.75:3.25,

[0050] The values ​​are valid within a range of ±10%.

[0051] Preferably, the outer diameter D of the near-end section of the waveguide rod is 4.2~5.3 mm, more preferably 4.7 mm; preferably, the outer diameter D1 of the far-end section of the waveguide rod is 3.1~3.8 mm, more preferably 3.45 mm; preferably, the diameter D2 of the large bamboo segment is 2.9~3.6 mm, more preferably 3.25 mm; preferably, the diameter D3 of the small bamboo segment is 2.65~3.24 mm, more preferably 2.94 mm; preferably, the length L1 of the near-end section of the waveguide rod is 35~42 mm, more preferably 39 mm; the length L2 of the far-end section of the waveguide rod is 35~42 mm, more preferably 39 mm; preferably, the length L3 of the large bamboo segment is 61.4~75 mm, more preferably 68.25 mm; preferably, the length L4 of the small bamboo segment is 114~139.4 mm, more preferably 126.75 mm.

[0052] An in vitro burst pressure comparison experiment was conducted between the ultrasonic surgical scalpel waveguide rod (experimental product) of this embodiment and a comparative product. The comparative product lacked a coagulation surface compared to the waveguide rod of this embodiment. Blood vessels with diameters between 3mm and 5mm were selected for cutting and coagulation tests. Figure 9 , Figure 10 The chart shows a comparison of external burst pressure test data, illustrating that the waveguide rod in this embodiment has a short sealing time for external burst pressure testing and can reach more than 5 times the blood pressure of a human body (hypertension 180 mmHg).

[0053] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention is not limited to the specific embodiments described above; these embodiments are merely illustrative and not limiting. Those skilled in the art, under the guidance of the present invention, can make many modifications without departing from the spirit and scope of the claims, and all such modifications fall within the scope of protection of the present invention.

Claims

1. An ultrasonic surgical scalpel waveguide rod, characterized in that, It includes a cutter head (1) and a rod body (2). The cutter head (1) includes an inner arc surface (1-1), an outer arc surface (1-2), a groove surface (1-3), a convex surface (1-5), a solidified surface (1-4), a first transition surface (1-6), and a second transition surface (1-7). The inner arc surface (1-1) and the outer arc surface (1-2) are arranged opposite to each other, and they are parallel straight lines in the cross-section of the cutter head (1). The cross-sectional width of the cutter head (1) refers to the distance between the inner arc surface (1-1) and the outer arc surface (1-2) in the cross-section of the cutter head (1). The smaller the cross-sectional width of the cutter head (1) along the direction away from the rod body (2), the better. The grooved surface (1-3) and the convex surface (1-5) are arranged adjacent to each other, and the grooved surface (1-3) and the convex surface (1-5) are respectively adjacent to the inner arc surface (1-1) and the outer arc surface (1-2). The condensation surface (1-4) is a plane, and the width a of the condensation surface (1-4) is 0.09~0.11 mm. The two sides of the condensation surface (1-4) are respectively adjacent to the first transition surface (1-6) and the second transition surface (1-7). The first transition surface (1-6) is adjacent to the inner arc surface (1-1), and the second transition surface (1-7) is adjacent to the outer arc surface (1-2).

2. The ultrasonic surgical scalpel waveguide rod according to claim 1, characterized in that, The cutter head (1) is bent along an arc tangent to the center line of the rod body (2), the radius of the arc being R; the tip width of the cutter head (1) is b1, the width of the cutter head cross-section at a distance d from the tip is b2, the radius of the inner arc surface (1-1) is R1, the radius of the outer arc surface (1-2) is R2, and the width of the solidified surface (1-4) is a. The following relationships must be satisfied: b2 = 0.06d + b1, R1 = R - b1, R2 = R + b1, a=0.1b1, The values ​​are valid within a range of ±10%.

3. The ultrasonic surgical scalpel waveguide rod according to claim 1, characterized in that, The rod (2) includes a proximal section of the waveguide rod, a distal section of the waveguide rod, and a large bamboo-joint segment and a small bamboo-joint segment located between the proximal section and the distal section of the waveguide rod. The outer diameter of the proximal section of the waveguide rod is D, the outer diameter of the distal section of the waveguide rod is D1, the diameter of the large bamboo-joint segment is D2, the diameter of the small bamboo-joint segment is D3, the length of the proximal section of the waveguide rod is L1, the length of the distal section of the waveguide rod is L2, the length of the large bamboo-joint segment is L3, and the length of the small bamboo-joint segment is L4. The following relationships must be satisfied: D:D1=34:25, D:D2=36:25 D:D3 = 8:5 L1:L2:L3:L4=1:1:1.75:3.25, The values ​​are valid within a range of ±10%.

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