CN215584294U

CN215584294U - Ultrasonic surgical knife head

Info

Publication number: CN215584294U
Application number: CN202120487307.4U
Authority: CN
Inventors: 颜忠余; 王磊; 刘振中; 骆威
Original assignee: Innolcon Medical Technology Suzhou Co Ltd
Current assignee: Innolcon Medical Technology Suzhou Co Ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2022-01-21
Anticipated expiration: 2031-03-08

Abstract

The utility model discloses an ultrasonic surgical knife head, wherein the projection of the knife head on a shearing surface is banana-shaped curved, and the thickness of the knife head is reduced from thickness to thinness from a near section to a far end, and then becomes thicker and thinner. The projection of the vertical shearing surface is in the shape of a fruit knife, the height of the knife head is changed from high to low and gradually decreased, and an arc-shaped cutting groove is arranged at the middle position. The utility model can lead to the increase of the shimmy amplitude and the effective working length of the bending direction of the cutter head, and a boat-shaped or arc-shaped balance groove is arranged between the farthest end node of the ultrasonic surgical cutter head and the tip end of the cutter head so as to improve the stability of the ultrasonic vibration.

Description

Ultrasonic surgical knife head

Technical Field

The utility model relates to the field of medical instruments, in particular to a cutter head of an ultrasonic scalpel.

Background

An ultrasonic scalpel (referred to as an ultrasonic scalpel for short) is an instrument which further amplifies ultrasonic vibration obtained by a piezoelectric transducer (an energy generator transmits electric energy to the piezoelectric transducer, and the piezoelectric transducer converts the electric energy into ultrasonic mechanical energy), and uses the amplified ultrasonic vibration for cutting and coagulating soft tissues by a head of the scalpel. Clinical use of such devices allows for focal resection with lower temperatures and less bleeding, and ensures minimal lateral thermal tissue damage. With the popularization of minimally invasive surgery, an ultrasonic scalpel has become a conventional surgical instrument.

At present, the clamping length (and the working length) of an ultrasonic scalpel is generally short, and the length of single cutting is mostly about 13mm, so that the tissue separation operation frequency in the operation is too high, and the operation time is also long; the clamping length is short, so that the diameter of the blood vessel exceeds 3mm, the sealing reliability is greatly reduced, and the clamping length is ineffective for the blood vessel with the diameter exceeding 5 mm. And the vibration amplitude is small, so that the operation time is too long.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems in the prior art and provides an ultrasonic surgical knife head which can improve the hemostasis effect and increase the effective working length.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

an ultrasonic scalpel head comprises a proximal scalpel tail and a distal scalpel tip, wherein the joint surface of the scalpel head and a claw pad of the ultrasonic scalpel is a shearing surface, the projection of the ultrasonic scalpel head on the shearing surface is in a banana-shaped curved shape, thickness changes are formed from the scalpel tail and the scalpel tip, the thicknesses are respectively T1, T2, T3, T4, T1> T3> T2> T4, and T1 is T2+ T3+ T4 with the error of +/-10%.

The utility model provides an ultrasonic scalpel head, is including the sword tail that is located the near-end and the knife tip that is located the distal end, the faying face of tool bit and ultrasonic scalpel's claw pad is the shear plane, ultrasonic scalpel head is in projection on the shear plane is banana shape crookedness, including preceding concave surface and back convex surface, the length of preceding concave surface is L1, radian radius is R2, the length of back convex surface is L2, and include and be close to the first convex surface of sword tail and be close to the second convex surface of knife tip, both rounding off, the radius of first convex surface is R4, the radius of second convex surface is R3, the thickness of sword tail is T1, the thickness of knife tip is T4, the contained angle of knife tip department central line and horizontal line is alpha, satisfies following formula:

error. + -. 10%.

Preferably, the length L1 of the concave front surface is between 15mm and 19mm, preferably 17.5 mm.

Preferably, the radius of curvature R2 of the concave front surface is between 19mm and 25mm, preferably 22 mm.

Preferably, the length L2 of the rear convex surface is between 13mm and 17mm, preferably 14.5 mm.

Preferably, the radius R4 of the first convex surface of the rear convex surface is between 3mm and 7mm, preferably 5mm, and the radius R3 of the second convex surface is between 12mm and 16mm, preferably 14 mm.

Preferably, the proximally located blade tail 101 has a proximally extending cylindrical section.

Preferably, in a projection on the shearing surface, the highest point of the tool tip is higher than the highest point of the cylindrical section, and the lowest point of the second convex surface is lower than the lowest point of the cylindrical section.

An ultrasonic scalpel head comprises a scalpel tail located at a near end and a scalpel tip located at a far end, wherein a joint surface of the scalpel head and a claw pad of the ultrasonic scalpel is a shearing surface, the projection of the ultrasonic scalpel head on the shearing surface is in a banana-shaped bent shape, the projection of the ultrasonic scalpel head on the shearing surface is in a fruit knife shape, the height of the ultrasonic scalpel head gradually decreases from the scalpel tail to the scalpel tip, and an arc-shaped cutting groove is formed in a position close to the scalpel tail.

The radius of the circular arc-shaped cutting groove is R1, and preferably 7 mm.

Preferably, the upper end of the cutter head is provided with an arc-shaped tangent plane, and the lower end of the cutter head is provided with a V-shaped cutting groove.

Preferably, the width of the distal end of the ultrasonic surgical blade in the direction perpendicular to the shearing plane is half of the diameter of the proximal end.

The utility model provides an ultrasonic surgical knife head, is including the sword tail that is located the near-end and the knife tip that is located the distal end, the faying surface of tool bit and ultrasonic surgical knife's claw pad is the shear plane, ultrasonic surgical knife head is in the projection on the shear plane is banana shape bending form, be provided with at least one balancing tank between the first node of sword tail and ultrasonic surgical knife.

Preferably, the projection of the balancing groove on the shearing surface is a ship-shaped structure, or an arc structure, or a combination of the ship-shaped structure and the arc structure.

The utility model has the following beneficial effects: the projection of the ultrasonic surgical knife head on the shearing surface is in a banana-shaped bent shape, the thickness of the knife head is reduced from thickness to thickness from the near section to the far end, the knife head is thickened and then reduced, the projection of the ultrasonic surgical knife head on the vertical shearing surface is in a fruit knife shape, the height of the knife head is reduced from high to low and gradually reduced, and an arc-shaped cutting groove is formed in the middle position, so that the swinging amplitude of the bending direction of the knife head and the effective working length can be increased; a ship-shaped or arc-shaped balance cutting groove is formed between the farthest end node of the ultrasonic surgical knife head and the tip end of the knife head, so that the stability of ultrasonic vibration is improved.

Drawings

FIG. 1 is a schematic view of an ultrasonic surgical blade of the present invention used with an endoscopic surgical instrument;

FIG. 2 is a detailed assembly schematic view of the ultrasonic surgical blade of the present invention as used with an endoscopic surgical instrument;

FIGS. 3 and 4 are schematic perspective views of an ultrasonic surgical blade according to the present invention in shear plane;

FIG. 5 is a schematic view of a projection of an ultrasonic surgical blade according to the present invention in a direction perpendicular to the shear plane;

FIG. 6 is a schematic view of the configuration of the tip of an ultrasonic surgical blade of the present invention;

FIG. 7 is a schematic view of a first embodiment of a balancing groove of the ultrasonic surgical blade of the present invention;

FIG. 8 is a schematic view of a second embodiment of a balancing groove of the ultrasonic surgical blade of the present invention.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art in light of these embodiments are intended to be within the scope of the present invention.

Referring to FIGS. 1 and 2, an ultrasonic surgical blade 100 for use with an endoscopic surgical instrument 110 or an open surgical instrument is disclosed. The ultrasonic surgical blade 100 is disposed at the distal end of the surgical instrument and cooperates with the pivotally disposed jaw pads to perform cutting and/or stapling of tissue.

Referring to fig. 3 to 6, an ultrasonic surgical blade 100 according to a preferred embodiment of the present invention includes a blade tip 102 at a distal end and a blade tail 101 at a proximal end, and the engagement surface of the blade tip with the jaw pad of the ultrasonic surgical blade is a shear surface.

The projection of the ultrasonic surgical knife head on the shearing surface is in a banana-shaped curved shape, the thickness of the ultrasonic surgical knife head changes from the knife tail 101 to the knife tip 102, and the thicknesses are respectively T1, T2, T3, T4, T1> T3> T2> T4, T1 is T2+ T3+ T4, and the error is +/-10%.

Because the near end of the ultrasonic surgical knife head is the supporting end in actual use, the size of the ultrasonic surgical knife head is the maximum value in order to keep the integral rigidity and stability. The distal tip must be a size minimum for better separation and finer manipulation. For the cutter head with the bending shape, bending vibration can be generated on the cutter head, and further, transverse vibration of the rod body is caused, and abnormal phenomena such as random vibration, abnormal sound and heating are caused. Therefore, the utility model ensures the overall balance by controlling the size of each part of the cutter head.

Specifically, the projected banana-shaped curved shape of the ultrasonic scalpel head on the shearing surface of the present invention includes a front concave surface and a rear convex surface, the length 114 of the front concave surface is L1, the arc radius 113 is R2, the length 117 of the rear convex surface is L2, the front concave surface includes a first convex surface close to the scalpel tail 101 and a second convex surface close to the scalpel tip 102, the two are in smooth transition, the radius 118 of the first convex surface is R4, the radius 116 of the second convex surface is R3, the thickness of the scalpel tail 101 is T1, the thickness of the scalpel tip 102 is T4, the included angle 119 between the center line of the scalpel tip and the horizontal line is α, and the following formula is satisfied:

error. + -. 10%.

The proximally located blade tail 101 has a proximally extending cylindrical section 111. In the projection on the shearing plane, the highest point 115 of the knife tip 102 is higher than the highest point of the cylindrical section 111, and the lowest point of the second convex surface 116 is lower than the lowest point of the cylindrical section 111.

The difference of preceding concave surface and back convex arc length receives rear end support section diameter T1 and most advanced thickness T4 combined action to decide, and the cutter arbor that satisfies above-mentioned formula design can be the at utmost the holistic design focus of guaranteeing crooked tool bit shape be located the central line of pole body to guarantee the stability of mode of shaking. And the highest point of the tip of the cutter head is higher than that of the cylindrical section 111, and the lowest point of the second convex surface 116 is lower than that of the cylindrical section 111. The design can ensure that the bending curvature of the bending cutter head is realized to the maximum extent on the basis of ensuring the stability of the vibration form. In this way, the shimmy amplitude in the bending direction can be significantly increased, and a faster heat accumulation speed can also be generated, which contributes to firmer coagulation between the blood vessel walls, thereby realizing a more reliable blood vessel closure effect.

In the preferred embodiment, the length L1 of the concave front surface is between 15mm and 19mm, preferably 17.5 mm. The length determines the shearing length of a final product, the reduction of resonant frequency, the improvement of processing difficulty and the improvement of resonant stress can be caused by overlong, and the comprehensive selection of 17.5mm is an ideal parameter.

In the preferred embodiment, the radius of curvature R2 of the concave front surface is between 19mm and 25mm, preferably 22 mm.

In the preferred embodiment, the length L2 of the rear convex surface is between 13mm and 17mm, preferably 14.5 mm.

In the preferred embodiment, the radius R4 of the first convex surface of the rear convex surface is between 3mm and 7mm, preferably 5mm

In the preferred embodiment, the radius R3 of the second convex surface is between 12mm and 16mm, preferably 14 mm.

In the preferred embodiment, the thickness T1 of the blade tail is between 2.2mm and 2.8mm, preferably 2.6 mm.

In the preferred embodiment, the thickness T4 of the tip is between 0.8mm and 1.2mm, preferably 0.9 mm. Too thick tip thickness can result in too wide a shear plane, which is not conducive to fine operation; too narrow results in reduced strength and a blade tip that is easily deformed and too sharp a tip increases the risk of accidental injury to healthy tissue during surgery, so the preferred 0.9mm of the preferred embodiment is a desirable parameter.

In the preferred embodiment, the included angle alpha between the center line of the knife tip and the horizontal line is about 30 degrees.

As shown in fig. 5, in the present invention, the projection of the ultrasonic scalpel head perpendicular to the cutting plane is in the shape of a fruit knife, the height of the ultrasonic scalpel head gradually decreases from the knife tail 101 to the knife tip 102, and an arc-shaped cutting groove 112 is formed near the knife tail 101. The tapered structure design of the progressive form can realize the increase of the effective working length. The longer working length can realize better closing of the large-diameter blood vessel and faster tissue separation speed, effectively reduce the time length and operation frequency of a single operation and reduce the fatigue strength of medical staff.

In the preferred embodiment, the radius of the circular arc-shaped cutting groove 112 is R1, preferably 7 mm. The distal-most width T5 is half the proximal diameter T1. The design of the size can ensure that the lowest point of the tip end of the cutter head is just positioned on the central line of the rod body, the volume of the space removed by the arc-shaped cutting groove 112 can just compensate the unstable vibration caused by the progressive taper structure at the far end, and the lifting amplitude of the progressive taper structure to the effective length is realized to the maximum extent on the premise of ensuring the stability.

As shown in fig. 6, when viewed in projection along the central axis of the tip of the cutting head, the cutting head has an arc-shaped section 120 at the upper end and a V-shaped notch 121 at the lower end. The angle formed by the inclined surfaces of both sides of the V-shaped cut groove 121 is preferably 100 °. The arc-shaped section 120 and the claw pad act together to realize the cutting and blood coagulation effects on soft tissues. The sharp edges formed by the V-shaped cuts 121 facilitate better separation of the thin film tissue.

As shown in fig. 7 and 8, the ultrasonic-surgical-blade head is provided with at least one balancing groove between the blade tail 101 and the first node 122 of the ultrasonic surgical blade. The projection of the balancing groove on the shearing plane can be a boat-shaped structure 123 shown in fig. 7, or an arc-shaped structure 124 shown in fig. 8, or a combination of the boat-shaped structure and the arc-shaped structure. Such a structure is intended to improve the stability of ultrasonic vibration. The curved asymmetric insert design, as with the insert shape design described above, inherently tends to result in unstable operation of the insert. In consideration of the practical conditions of the processing deviation and the bending of the long straight cutter bar, the final product may generate very large bending vibration, torsional vibration or other forms of vibration. This may reduce system stability, generate abnormal noise, reduce ultrasonic transmission efficiency, generate abnormal heat, and the like. In view of this, the utility model proposes to add one or more balancing notches, preferably with a compensation position between the most distal node and a position in the middle of the head.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the utility model, and these modifications and adaptations should be considered within the scope of the utility model.

Claims

1. An ultrasonic scalpel head, comprising a proximal end (101) and a distal end (102), wherein the joint surface of the ultrasonic scalpel head and a jaw pad of the ultrasonic scalpel is a shear plane, and the projection of the ultrasonic scalpel head on the shear plane is banana-shaped, and thickness variations are formed from the blade tail (101) and the blade tip (102), wherein the thicknesses are respectively T1, T2, T3, T4, T1> T3> T2> T4, and T1 is T2+ T3+ T4 with an error of +/-10%.

2. An ultrasonic scalpel head comprises a scalpel tail (101) positioned at a near end and a scalpel tip (102) positioned at a far end, wherein a combined surface of the scalpel head and a claw pad of the ultrasonic scalpel is a shearing surface, the ultrasonic scalpel head is in a banana-shaped curved shape in projection on the shearing surface and comprises a front concave surface and a rear convex surface, the length (114) of the front concave surface is L1, the radian radius (113) of the front concave surface is R2, the length (117) of the rear convex surface is L2, the ultrasonic scalpel head comprises a first convex surface close to the scalpel tail (101) and a second convex surface close to the scalpel tip (102), the first convex surface and the second convex surface are in smooth transition, the radius (118) of the first convex surface is R4, the radius (116) of the second convex surface is R3, the thickness of the scalpel tail (101) is T1, the thickness of the scalpel tip (102) is T4, and an included angle (119) between a central line of the scalpel tip and a horizontal line is alpha, the following formula is satisfied:

error. + -. 10%.

3. The ultrasonic surgical blade of claim 2, wherein the length (114) L1 of the front concave surface is between 15mm and 19 mm.

4. The ultrasonic surgical blade of claim 2, wherein the forward concave surface has a radius of curvature (113) R2 of between 19mm and 25 mm.

5. The ultrasonic surgical blade of claim 2, wherein the length (117) L2 of the rear convex surface is between 13mm and 17 mm.

6. The ultrasonic surgical blade of claim 2, wherein the radius (118) R4 of the first convex surface of the rear convex surface is between 3mm and 7mm, and the radius R3 of the second convex surface (116) is between 12mm and 16 mm.

7. The ultrasonic surgical blade of claim 2, wherein the proximally located blade tail (101) has a proximally extending cylindrical section (111).

8. The ultrasonic surgical blade of claim 7, wherein, in projection on the shear plane, the highest point (115) of the blade tip (102) is higher than the highest point of the cylindrical section (111), and the lowest point of the second convex surface (116) is lower than the lowest point of the cylindrical section (111).

9. An ultrasonic scalpel head comprises a scalpel tail (101) located at a near end and a scalpel tip (102) located at a far end, and a joint surface of the scalpel head and a claw pad of the ultrasonic scalpel is a shearing surface, and is characterized in that the projection of the ultrasonic scalpel head on the shearing surface is banana-shaped curved, the height of the projection perpendicular to the shearing surface gradually decreases from the scalpel tail (101) to the scalpel tip (102), and an arc-shaped cutting groove (112) is formed in a position close to the scalpel tail (101).

10. The ultrasonic surgical blade of claim 9, wherein the blade has an arcuate cut surface (120) at an upper end and a V-shaped notch (121) at a lower end.

11. The ultrasonic surgical blade of claim 9, wherein the distal end of the ultrasonic surgical blade has a width that is half the diameter of the proximal end in a direction perpendicular to the shear plane.

12. The ultrasonic scalpel head comprises a scalpel tail (101) located at the near end and a scalpel tip (102) located at the far end, and the joint surface of the scalpel head and a claw pad of the ultrasonic scalpel is a shear surface, and is characterized in that the projection of the ultrasonic scalpel head on the shear surface is in a banana-shaped curved shape, and at least one balance groove is arranged between the scalpel tail (101) and a first node (122) of the ultrasonic scalpel.