CN217447938U

CN217447938U - Ultrasonic surgical scalpel

Info

Publication number: CN217447938U
Application number: CN202122952730.XU
Authority: CN
Inventors: 邓荣海; 张学刚; 左鹏飞
Original assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Current assignee: Shenzhen Mindray Bio Medical Electronics Co Ltd
Priority date: 2021-03-29
Filing date: 2021-11-29
Publication date: 2022-09-20
Anticipated expiration: 2031-11-29
Also published as: CN115120308A

Abstract

The application relates to an ultrasonic surgical scalpel, which is characterized in that a first material layer is processed on a blood coagulation cutting surface of the ultrasonic surgical scalpel, so that a single-layer low-friction-coefficient coating layer is coated on a metal base material. The thickness of the single-layer coating can be thinner, and the product performance is better, so that the service life of the product is prolonged. The coating has better adhesion than the coating and is less prone to falling off, and the requirement of multiple use of the product is met.

Description

Ultrasonic surgical scalpel

Technical Field

The utility model relates to the field of medical equipment, concretely relates to ultrasonic surgery scalpel.

Background

An ultrasonic blade is an essential tool for performing ultrasonic treatment. The application principle of the ultrasonic scalpel is that the transducer converts electric energy into mechanical vibration, and the vibration is transmitted to the scalpel head through the guide rod, so that the scalpel head generates mechanical oscillation, and the cutting and coagulation effects on animal or human tissues are achieved. The ultrasonic scalpel has the advantages of high cutting precision, less bleeding, less thermal injury and the like, and is widely applied to surgical operations. In the conventional technical scheme, the tool bit of the ultrasonic knife has the following three processing schemes: 1. the surface of the cutter head is sandblasted without a coating; 2. the surface of the cutter head is provided with two layers of surface coatings or a combination of the coatings and the plating layers; 3. the surface of the cutting insert has only a single coating.

The reason why the surface of the ultrasonic knife head in the scheme 2 adopts two layers of coatings is that a single-layer low-friction-coefficient nonmetal coating cannot be directly and effectively attached to a metal base material of the ultrasonic knife through spraying, and can be effectively attached only through a plating layer. The single-layer coating in the scheme 3 needs to be processed by a plurality of complex processes, and has high technical difficulty and high cost. In the use of actual supersound sword, in order to satisfy the wear-resisting requirement of supersound sword, the coating generally designs thickly, and thicker coating has increased supersound sword impedance, and the whole regional coating structure of tool bit also can further lead to the impedance to rise, and finally supersound sword can be because transducer production heat is too big, leads to appearing the product reliability low, therapeutic effect subalternation problem.

SUMMERY OF THE UTILITY MODEL

The present application provides a new ultrasonic surgical blade.

In accordance with the above objects, there is provided in one embodiment an ultrasonic surgical blade including a blade tip for directly acting on a tissue object, and a waveguide for transmitting vibration to the blade tip, the blade tip comprising:

a body made of a metallic material having a proximal end and a distal end; the body is connected with the waveguide rod at a proximal end and extends to the distal end along a longitudinal direction away from the waveguide rod in a bending way; the body receives the ultrasonic vibration transmitted from the waveguide rod so that the body can perform operation treatment on the tissue object based on the received ultrasonic vibration, and a coagulation cutting surface is arranged on the body;

and a first material layer formed on the coagulation cutting surface of the body, the first material layer having a surface energy lower than a surface energy of the body surface.

In one embodiment, the first material layer is a coating formed by processing a first material on the coagulation cutting surface by a vacuum coating process.

In one embodiment, the first material is a polymeric material or a polymer-containing material.

In one embodiment, the thickness a of the first material layer has a value range of: a is more than or equal to 5 nanometers and less than or equal to 0.3 millimeter.

In one embodiment, the thickness a of the first material layer has a value range of: a is more than or equal to 5 microns and less than or equal to 8 microns.

In one embodiment, the main body further comprises an auxiliary surface connected with the coagulation cutting surface and a second material layer formed on the auxiliary surface, wherein the second material layer is a coating formed by processing a second material on the auxiliary surface by a vacuum coating process.

In one embodiment, the thickness of the second material layer is less than the thickness of the first material layer.

In one embodiment, the thickness b of the second material layer has a value range of: b is more than or equal to 1 nanometer and less than or equal to 0.3 millimeter.

In one embodiment, the thickness b of the second material layer has a value range of: b is more than or equal to 1 micron and less than or equal to 2 microns.

In one embodiment, the second material layer is the same or different from the first material layer.

In one embodiment, the second material is a non-metallic material.

In one embodiment, the second material is a polymeric material or a polymer-containing material.

In one embodiment, the first material layer does not overlap, partially overlaps, or fully overlaps the second material layer.

In one embodiment, all or part of the first material layer or the second material layer is electrically conductive.

In one embodiment, the main body of the tool tip is provided with a back cutting part, and the coagulation cutting surface and the back cutting part are symmetrically or approximately symmetrically arranged on two sides of a central axis of the tool tip along the longitudinal direction;

the first material layer or the second material layer arranged on the blood coagulation cutting surface is not conductive, and the first material layer or the second material layer arranged on the back cutting part or the area except the blood coagulation cutting surface and the back cutting part is conductive or non-conductive.

In one embodiment, the surface energy of the second material layer is greater than the surface energy of the first material layer and less than the surface energy of the body, and the hardness of the second material layer is greater than the hardness of the first material layer.

In one embodiment, the first and second materials are each a combination of one or more of carbon tetrafluoride, hexafluoroethane, hexafluoropropane, heptafluoropropane, octafluoropropane, perfluorobutane, perfluoropentane, decafluoropentane, perfluorohexane, a copolymer of tetrafluoroethylene and hexafluoropropylene, a ceramic composite, polytetrafluoroethylene, a ceramic composite, polypropylene, polyethylene, polycaprolactone, tungsten disulfide, molybdenum disulfide, graphite, alumina, tungsten oxide, titanium nitride, chromium carbide, tungsten carbide, and a metallized ceramic, respectively.

It can be seen that the application realizes that a single-layer low-friction-coefficient coating is coated on a metal base material by processing a first material layer on a coagulation cutting surface of an ultrasonic surgical scalpel. The thickness of the single-layer coating can be thinner, and the product performance is better, so that the service life of the product is prolonged. The coating has better adhesion than the coating and is less prone to falling off, and the requirement of multiple use of the product is met.

Further, in some embodiments, the thickness and material of the coating can be the same or different for different functional areas, such as a blood coagulation cutting surface, which needs wear resistance, the thickness of the coating is increased, and the thickness of the coating can be relatively thinner for the auxiliary surfaces on both sides, so that the impedance of the cutter bar can be lower under the condition of meeting the functional performance of the product.

Drawings

FIG. 1 is a schematic view of a blade tip configuration of an ultrasonic surgical blade of an ultrasonic surgical instrument of the present application;

FIG. 2 is a schematic view of a waveguide and a blade tip of the ultrasonic surgical instrument of the present application;

FIG. 3 is a schematic view of the structure of the ultrasonic surgical instrument of the present application in which the handle is connected to the waveguide rod and the blade tip;

FIG. 4 is a schematic view of the connection of a handle and a transducer of the ultrasonic surgical instrument of the present application;

FIG. 5 is a schematic view of an ultrasonic blade system of the ultrasonic surgical instrument of the present application.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments have been given like element numbers associated therewith. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, one skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.

Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments. Also, the various steps or actions in the method descriptions may be transposed or transposed in order, as will be apparent to one of ordinary skill in the art. Thus, the various sequences in the specification and drawings are for the purpose of describing certain embodiments only and are not intended to imply a required sequence unless otherwise indicated where such sequence must be followed.

The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" as used herein includes both direct and indirect connections (couplings), unless otherwise specified.

Example one

The present embodiment provides an ultrasonic surgical instrument, and in particular, fig. 1 is a schematic view of a knife tip structure of an ultrasonic surgical knife in an embodiment of the present application, which includes a main body including a coagulation cutting surface 1, an auxiliary surface 2, and a coagulation cutting portion 3. The coagulation cut surface 1 and the auxiliary surface 2 may be provided with a plating layer. The areas of the coagulation cut surface 1 and the auxiliary surface 2 are shown in different colors.

In a specific embodiment, the metal substrate is coated with a single-layer non-metal coating with a low friction coefficient by a vacuum coating process and one-step processing and forming. The thickness of the single-layer coating can be thinner, and the product performance is better, so that the service life of the product is prolonged. The coating has better adhesion than the coating and is less prone to falling off, and the requirement of multiple use of the product is met. In another embodiment, the coating thickness/material may be different for different functional areas (e.g. coagulation cut surface 1 and auxiliary surface 2). If the surface of the tissue coagulation cutting surface needs a wear-resistant function, the thickness of the coating is increased, and the thicknesses of the auxiliary surfaces 2 on the two sides can be relatively thinner, so that the impedance of the cutter bar can be minimum under the condition of meeting the functional performance of a product. Preferably, in each embodiment of the present disclosure, there is at least one plating layer.

As shown in fig. 1, a plating structure is provided on the coagulation cut surface 1 at the blade tip. In another embodiment, based on the function of the auxiliary surface 2, a plating layer may not be provided or a plating layer with a small thickness (smaller than the thickness of the plating layer on the coagulation cut surface 1) may be provided, and the material of the plating layer is not limited to be exactly the same as that of the coagulation cut surface 1. In another embodiment, the surfaces directly processed by the tissue treatment in the operation process are the surfaces required by the operation, such as the coagulation cutting surface 1 and the auxiliary surface 2, which are provided with the same material and the same thickness of coating.

Aiming at different functional areas, the coating thickness is different/the material can also be different, for example, the blood coagulation cutting surface 1 needs wear resistance, the coating thickness is increased, the auxiliary surfaces 2 on the two sides can be relatively thinner, and thus the impedance of the cutter bar can be the lowest under the condition of meeting the functional performance of the product.

In a preferred embodiment, there may be an overlap between the coating layers, for example, based on the ultrasonic blade having completed the arrangement of the first material layer, a second material layer may be continuously arranged on the auxiliary surface 2, or the coagulation cutting surface 1 may be further processed.

Further, for the ultrasonic blade head processed as above, the present embodiment further performs an impedance test thereon, and the test results are as follows:

coating construction range: including but not limited to the coagulation cutting section of the cutting head, in a specific embodiment, only the coagulation cutting section is plated, which can effectively prevent the cutting head from being adhered to the tissue during the operation. The other portions may be plated based on the specific working requirement of the ultrasonic blade, which is not limited in this embodiment.

Plating or plating thickness: the thickness range of the coating is 5 nanometers-0.3 millimeter, and different coating thicknesses can be applied to different areas according to specific requirements. In a specific embodiment, the coagulation cutting surface 1 needs to be wear resistant, and the coating thickness is the thickest, preferably 5-8 μm, while the two side auxiliary surfaces 2 need not be wear resistant, and the coating thickness can be thinner, preferably 1-2 μm.

Coating or coating material: in this embodiment, the first material, the second material may be a polymeric material or a polymer-containing material, such as, but not limited to, including carbon tetrafluoride, hexafluoroethane, hexafluoropropane, heptafluoropropane, octafluoropropane, perfluorobutane, perfluoropentane, decafluoropentane, perfluorohexane, copolymer of Tetrafluoroethylene (TFE) and Hexafluoropropylene (HFP) (FEP), FEP/ceramic composite, Polytetrafluoroethylene (PTFE), PTFE/ceramic composite, polypropylene, polyethylene, polycaprolactone; non-polymers such as, but not limited to, tungsten disulfide, molybdenum disulfide, graphite, aluminum oxide, tungsten oxide, titanium nitride, chromium carbide, tungsten carbide, metallized ceramics, stainless steel, molybdenum; other materials include silica gel, inorganic polysilazane, organic polysilazane, modified inorganic polysilazane, and modified organic polysilazane. The plating layer of the present embodiment may be formed of one or a combination of the above. Preference is given to Polytetrafluoroethylene (PTFE), PTFE/ceramic composites, chromium nitride coatings, organopolysilazanes. That is, the first material and the second material in this embodiment may be one of the above polymeric materials or polymer-containing materials, or a combination of multiple materials, which is not specifically limited in this embodiment.

Example two

The present embodiments provide an ultrasonic surgical blade that may be used as one type of ultrasonic surgical instrument. Referring to fig. 1 and 2, the ultrasonic surgical blade includes a blade tip 100 directly acting on a tissue object and a waveguide rod 200 for transmitting vibration to the blade tip 100. The tip 100 includes a body made of a metallic material having a proximal end and a distal end. The body is connected at a proximal end to the waveguide rod 200 and curves longitudinally away from the waveguide rod 200 to a distal end. The body receives the ultrasonic vibration transmitted from the waveguide rod 200 so that the body can perform an operation treatment on the tissue object based on the received ultrasonic vibration. The main body of the cutting tip 100 includes a coagulation cutting section 3, and the coagulation cutting section 3 includes a coagulation cut surface 1 for realizing coagulation and cutting functions and an auxiliary surface 2 connecting the coagulation cut surface 1. The tip 100 may also have a back cut 5 away from the coagulation cutting surface 1 to increase cutting flexibility. The areas of the coagulation cut surface 1 and the auxiliary surface 2 are shown in different gradations.

In order to meet the wear-resistant requirement of the coagulation cut surface 1, a first material layer is provided on the coagulation cut surface 1, and the surface energy of the first material layer is lower than that of the surface of the main body.

Further, in one embodiment, to reduce the effect of the first material layer on the resistance of the tip 100, the first material layer is a coating of a first material machined onto the coagulation cut surface 1.

Specifically, in the conventional coating process, the surface coating is bonded to the metal substrate of the tool tip 100 by the primer glue, and the bonding force of the glue is generally small, especially the bonding force of a coating with a small friction coefficient, such as a fluorine coating, is poor, and the atomic distance between the coating and the substrate is not dense, so that the coating is easy to fall off. Therefore, a layer of priming coating is often required to be arranged on the metal base material of the tool tip 100, and then a coating with higher wear resistance is coated on the priming coating, which results in that the coating on the outer side of the tool tip 100 is too thick, so that the impedance of the tool tip 100 is increased sharply, and further the heat of the transducer is increased greatly, and the reliability of the product is reduced. In contrast, the first material is the plating layer on the coagulation cutting surface 1 in this embodiment, and this plating layer can be with more firm the adhering to of coagulation cutting surface 1, need not to set up priming coat, and then the thickness of selection plating layer that can be more nimble to under the prerequisite that satisfies wear-resisting requirement, reduce the impedance of knife tip 100, improve the reliability of knife tip 100.

In addition, in the present embodiment, at least the blood coagulation cut surface 1 is ensured to be provided with a coating, and other areas, such as the auxiliary surface 2 and the back cut portion 5, can determine whether to provide the coating according to actual scene requirements. Compared with the prior art that the whole outer wall of the tool tip 100 is provided with the coating, when the auxiliary surface 2 or the back cutting part is not provided with the coating or is provided with the thinner coating, the impedance of the areas can be further reduced, and the reliability of the tool tip 100 is further improved. Moreover, the surface energy of the first material layer is lower than that of the main body surface, so that the coagulation cutting surface 1 is less prone to adhere to human tissues relative to the main body surface (such as the main body surface directly exposed), and the knife tip 100 is prevented from being hung on the human tissues.

When the plating layer formed by the first material is adopted as the wear-resistant layer, the value range of the thickness a of the first material layer can be set as follows: a is more than or equal to 5 nanometers and less than or equal to 0.3 millimeter, the value range can not only ensure that the blood coagulation cutting surface 1 meets the wear-resistant requirement, but also control the impedance of the area of the blood coagulation cutting surface 1 in a smaller range, and is beneficial to ensuring the reliability of the tool nose 100.

In the value range of a, there is a difference between different small ranges, and in one embodiment, the value range of the thickness a of the first material layer is set as follows: a is more than or equal to 5 microns and less than or equal to 8 microns. Within this smaller range, a better balance can be achieved in meeting both wear requirements and impedance control, resulting in a better final result in comparison, which is more conducive to ensuring reliability of the tip 100.

Further, as described above, the tip 100 may be provided with or without a protective layer in other regions than the coagulation/cutting surface 1. In an embodiment of the present application, the auxiliary surface 2 is provided with a second material layer, similar to the first material layer, and different from the coating in the prior art, in the embodiment, the second material layer is a coating layer formed by processing a second material on the auxiliary surface 2. This cladding material can with the more firm adhesion of auxiliary surface 2, need not to set up the priming coat, and then the thickness of the selection cladding material that can be more nimble to under the prerequisite that satisfies wear-resisting requirement, reduce the impedance of knife tip 100, improve the reliability of knife tip 100.

Wherein, the first material and the second material can adopt the same or different materials. For example, in order to reduce the processing cost, the first material layer and the second material layer may be formed by providing plating layers of the same material on the coagulation cut surface 1 and the auxiliary surface 2 at the same time. However, since the coagulation cut surface 1 and the auxiliary surface 2 have different requirements for wear resistance, wherein the auxiliary surface 2 has a lower requirement for wear resistance than the coagulation cut surface 1, it is also possible to provide plating layers of different materials on the coagulation cut surface 1 and the auxiliary surface 2, respectively, to form the first material layer and the second material layer. Thus, the variety of the selection of the first material layer and the second material layer is increased, and the coagulation cutting surface 1 and the auxiliary surface 2 can be selected from the most suitable materials according to the actual requirement.

The first material layer and the second material layer can be strictly distinguished from each other in respective areas, and can also be connected with each other into a whole. In some embodiments, the first material layer does not overlap, partially overlaps, or fully overlaps the second material layer. For example, the second material layer may cover a portion or all of the first material layer, or the first material layer may cover a portion or all of the second material layer.

In one embodiment, the second material layer has a surface energy higher than the first material layer and lower than the surface of the body, has a higher wear resistance than the first material, and has a hardness greater than the first material layer.

Further, in consideration of the requirement of the auxiliary surface 2 for wear resistance lower than that of the coagulation cut surface 1, the thickness of the second material layer may be set smaller than that of the first material layer. As the thickness of the second material layer is reduced, the resistance of the blade tip 100 can be further reduced, and the reliability of the product can be further improved.

For example, when a plating layer formed by the second material is used as the wear-resistant layer, in one embodiment, the thickness b of the second material layer may be in the range of: b is more than or equal to 1 nanometer and less than or equal to 0.3 millimeter. Preferably, in an embodiment, the thickness b of the second material layer has a value range of: b is more than or equal to 1 micron and less than or equal to 2 microns.

In this regard, this example also provides some experimental data for reference, which are as follows:

according to the above table, when the thickness of the second material layer is smaller than that of the first material layer, the impedance of the sample is obviously reduced while the first material layer is ensured to have the same wear-resisting property (for example, the thickness of the first material layer is kept between 5 and 8 micrometers).

Of course, the thickness of the second material layer may be set to be equal to or greater than the thickness of the first material layer in some embodiments, based on other requirements.

Further, in one embodiment, all or part of the first material layer or the second material layer is conductive to meet the corresponding conductive requirement.

In one embodiment, when the main body of the blade tip 100 is provided with the back cut part 5, the coagulation cut surface 1 and the back cut part 5 are symmetrically or approximately symmetrically arranged on two sides of the central axis of the blade tip 100 along the longitudinal direction; the first material layer or the second material layer arranged on the blood coagulation cutting surface 1 is not conductive, and the first material layer or the second material layer arranged on the back cutting part 5 or the region except the blood coagulation cutting surface 1 and the back cutting part 5 is conductive or non-conductive, so that the corresponding conductive requirement is met.

Further, in order to provide better adhesion between the first material layer and the second material layer and the cutting tip 100, in one embodiment, the process of molding the first material and/or the second material on the blood coagulation cutting surface 1 is a vacuum coating process. The vacuum plating process can ionize under vacuum and then combine positive and negative ions to form a chemical bond with strong binding force, the coating is ionized into atomic particles, the atomic particles impact a metal base material through an electric field, and the accumulation is dense, so the binding force is strong.

Further, the tip 100 is typically made of a metallic material, combining machining processes, wear resistance, and cost considerations, and in one embodiment, the first material and/or the second material is a non-metallic material.

In particular, in one embodiment, the first material and/or the second material is a polymeric material or a polymer-containing material. The polymeric materials and polymer-containing materials include, for example, but are not limited to, copolymers (FEP) including carbon tetrafluoride, hexafluoroethane, hexafluoropropane, heptafluoropropane, octafluoropropane, perfluorobutane, perfluoropentane, decafluoropentane, perfluorohexane, Tetrafluoroethylene (TFE) and Hexafluoropropylene (HFP), FEP/ceramic composites, Polytetrafluoroethylene (PTFE), PTFE/ceramic composites, polypropylene, polyethylene, polycaprolactone. Non-polymers such as, but not limited to, tungsten disulfide, molybdenum disulfide, graphite, aluminum oxide, tungsten oxide, titanium nitride, chromium carbide, tungsten carbide, metalized ceramics. In one embodiment, the first material and/or the second material may also be selected from silica gel, inorganic polysilazane, organic polysilazane, modified inorganic polysilazane, and modified organic polysilazane. Wherein the first material and/or the second material may be formed from one or more of the above in combination. In some embodiments, Polytetrafluoroethylene (PTFE), PTFE/ceramic composites, chromium nitride coatings, organic polysilazanes may be preferred.

In the vacuum coating process, the target area is an area where the coating needs to be provided on the cutting tip 100, in one embodiment, the target area at least comprises the blood coagulation cutting surface 1, and in other embodiments, the target area may also comprise the auxiliary surface 2 and/or the back cutting part 5.

In the vacuum coating process, the material to be coated can be a first material and/or a second material according to different areas where the coating is arranged.

Further, referring to fig. 2, an embodiment of the present invention further provides an ultrasonic surgical blade, which includes a blade tip 100 and a waveguide rod 200, wherein the blade tip 100 is disposed at one end of the waveguide rod 200. The tip 100 is the tip as shown in the first embodiment or the tip as shown in the second embodiment.

The tip 100 may be integrally formed with the waveguide rod 200 or separately manufactured and then fixedly attached to transmit vibrations.

Referring to fig. 3, an embodiment further provides a structure of a handle 1000 of an ultrasonic surgical knife, the handle 1000 includes a clamping assembly 300 for connecting with the knife tip 100 as shown in any of the above embodiments, and the knife tip 100 is mounted on the clamping assembly 300 through a waveguide rod 200. The clamping assembly 300 can control a clip 400 to engage the tip 100 to clamp and unclamp a target object.

Referring to fig. 4, an embodiment of an ultrasonic surgical blade is further provided, which includes a blade handle 1000 and a transducer 2000 as shown in the above embodiments, the transducer 2000 is connected to the blade handle 1000, the transducer 2000 can convert an electrical signal into mechanical vibration, and the generated vibration can be transmitted to the blade handle 1000, especially to the waveguide rod 200 and the blade tip 100 connected to the blade handle 1000.

Referring to fig. 5, an embodiment of the present invention further provides an ultrasonic scalpel system, which includes the ultrasonic scalpel as shown in the above embodiment, and a host 3000, wherein the host 3000 is in signal connection with the transducer 2000 of the ultrasonic scalpel, so as to control the transducer 2000 to operate and generate mechanical vibration. Meanwhile, the host 3000 may also be used to receive signal feedback from the surgical object and perform correlation analysis.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims

1. An ultrasonic surgical blade comprising a blade tip for directly acting on a tissue object and a waveguide rod for transmitting vibrations to the blade tip, the blade tip comprising:

a body made of a metallic material having a proximal end and a distal end; the body is connected to the waveguide rod at a proximal end and extends to the distal end in a longitudinal curve away from the waveguide rod; the body receives the ultrasonic vibration transmitted from the waveguide rod so that the body can perform operation treatment on the tissue object based on the received ultrasonic vibration, and a coagulation cutting surface is arranged on the body;

2. The ultrasonic surgical blade of claim 1, wherein the first material layer is a coating of a first material applied to the coagulation cut surface by a vacuum coating process.

3. The ultrasonic surgical blade of claim 2, wherein the first material is a polymeric material or a polymer-containing material.

4. The ultrasonic surgical blade of claim 1, wherein the thickness a of the first material layer ranges from: a is more than or equal to 5 nanometers and less than or equal to 0.3 millimeter.

5. The ultrasonic surgical blade of claim 4, wherein the thickness a of the first material layer ranges from: a is more than or equal to 5 microns and less than or equal to 8 microns.

6. The ultrasonic surgical blade of claim 1, wherein the body further comprises an auxiliary surface coupled to the coagulation cutting surface and a second material layer formed on the auxiliary surface, the second material layer being a coating of a second material applied to the auxiliary surface by a vacuum coating process.

7. The ultrasonic surgical blade of claim 6, wherein the thickness of the second layer of material is less than the thickness of the first layer of material.

8. The ultrasonic surgical blade of claim 6, wherein the thickness b of the second material layer ranges from: b is more than or equal to 1 nanometer and less than or equal to 0.3 millimeter.

9. The ultrasonic surgical blade of claim 8, wherein the thickness b of the second material layer ranges from: b is more than or equal to 1 micron and less than or equal to 2 microns.

10. The ultrasonic surgical blade of claim 6, wherein the second material layer is the same or different material than the first material layer.

11. The ultrasonic surgical blade of claim 6, wherein the second material is a non-metallic material.

12. The ultrasonic surgical blade of claim 11, wherein the second material is a polymeric material or a polymer-containing material.

13. The ultrasonic surgical blade of claim 6, wherein the first material layer does not overlap, partially overlaps, or fully overlaps the second material layer.

14. The ultrasonic surgical blade of claim 13, wherein all or a portion of the first material layer or the second material layer is electrically conductive.

15. The ultrasonic surgical blade of claim 14, wherein the body of the blade tip is provided with a back cut portion, and the coagulation cut surface and the back cut portion are symmetrically or approximately symmetrically arranged on both sides of a central axis of the blade tip in the longitudinal direction;

16. The ultrasonic surgical blade of claim 6, wherein the second layer of material has a surface energy greater than the surface energy of the first layer of material and less than the surface energy of the body, the second layer of material having a hardness greater than the first layer of material.

17. The ultrasonic surgical blade of any one of claims 6-16, wherein the first and second materials are each one of carbon tetrafluoride, hexafluoroethane, hexafluoropropane, heptafluoropropane, octafluoropropane, perfluorobutane, perfluoropentane, decafluoropentane, perfluorohexane, a copolymer of tetrafluoroethylene and hexafluoropropylene, a ceramic composite, polytetrafluoroethylene, polypropylene, polyethylene, polycaprolactone, tungsten disulfide, molybdenum disulfide, graphite, aluminum oxide, tungsten oxide, titanium nitride, chromium carbide, tungsten carbide, and a metalized ceramic, respectively.