CN212816438U

CN212816438U - Ultrasonic cutting tool and ultrasonic surgical instrument

Info

Publication number: CN212816438U
Application number: CN202020559414.9U
Authority: CN
Inventors: 吴增成; 吴云芳
Original assignee: Tonghui Hangzhou Medical Technology Co ltd
Current assignee: Tonghui Hangzhou Medical Technology Co ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2021-03-30
Anticipated expiration: 2030-04-16

Abstract

The embodiment of the application discloses an ultrasonic cutting tool and an ultrasonic surgical instrument. One embodiment of the ultrasonic cutting tool comprises a tool bar 101 and an ultrasonic transducer 102, wherein the tool bar 101 comprises a working head 1011, a neck 1012 and a connecting part 1013, the connecting part 1013 is connected with the ultrasonic transducer 102, a first through hole 103 is axially arranged inside the tool bar 101 and the ultrasonic transducer 102, and saw teeth 10111 are arranged on the cross section of the top end of the working head 1011. This embodiment can make the tip of work head and the area of contact of parts such as the skeleton that is cut, soft tissue littleer when using ultrasonic cutting cutter to cut to the local dynamics that acts on by the cutting part is bigger, makes by the cutting part more easily by the incision, and then improves operation efficiency, shortens operation time.

Description

Ultrasonic cutting tool and ultrasonic surgical instrument

Technical Field

The embodiment of the application relates to the technical field of medical instruments, in particular to an ultrasonic cutting tool and an ultrasonic surgical instrument.

Background

In the prior art, the top end of the working head of the ultrasonic cutting tool for cutting bones is of a plane structure or a blade-shaped structure, and when cutting is performed, because the contact area between the top end of the working head and a cut part is large, the efficiency of the output ultrasonic energy cavitation effect is low, so that the cutting speed is slow, and the operation time is prolonged. Especially when hard bones or soft tissues with strong toughness are encountered, the cutting speed is slower, and the operation time is longer.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an ultrasonic cutting tool and an ultrasonic surgical instrument, which solve the technical problems mentioned in the background technology section.

In a first aspect, an embodiment of the present application provides an ultrasonic cutting tool, including: the ultrasonic tool comprises a tool bar 101 and an ultrasonic transducer 102, wherein the tool bar 101 comprises a working head 1011, a neck 1012 and a connecting part 1013, the connecting part 1013 is connected with the ultrasonic transducer 102, the interior of the tool bar 101 and the interior of the ultrasonic transducer 102 are provided with a first through hole 103 along the axial direction, and the top end section of the working head 1011 is provided with saw teeth 10111.

In some embodiments, the serrations 10111 are pyramidal serrations.

In some embodiments, the neck 1012 is a curved structure.

In some embodiments, the neck 1012 has a bend angle of 45 degrees or less.

In some embodiments, the tool holder 101 and the ultrasonic transducer 102 are integrally formed.

In some embodiments, the blade bar 101 and the ultrasonic transducer 102 are removably coupled by a coupling 1013.

In some embodiments, the cross-sectional area of the neck 1012 decreases from the end distal to the working head 1011 to the end proximal to the working head 1011, and the cross-sectional area of the working head 1011 decreases from the end proximal to the neck 1012 to the tip of the working head 1011.

In some embodiments, the side of the working head 1011 includes a second through hole 10112.

In some embodiments, the surface of the cut portion of the working head 1011 is provided with an anti-adhesive coating 10113.

In a second aspect, embodiments of the present application provide an ultrasonic surgical instrument, including: the ultrasonic scalpel comprises an ultrasonic scalpel main body 701, an excitation switch 702 and an ultrasonic scalpel handle 703, wherein the ultrasonic scalpel handle comprises the ultrasonic cutting tool 7031 described in any one of the embodiments of the first aspect, and the ultrasonic scalpel main body is connected with the excitation switch and the ultrasonic scalpel handle respectively.

The embodiment of the application provides an ultrasonic cutting tool and ultrasonic surgical instrument, through setting the cutter arbor to including work head, neck and connecting portion, cutter arbor and ultrasonic transducer's inside sets up to hollow structure to set up the sawtooth on the top cross-section of work head, thereby can be when using ultrasonic cutting tool to cut, make the top of work head and the bone by the cutting, the area of contact at positions such as soft tissue is littleer, thereby it is bigger to use the local dynamics by cutting the position, make by cutting the position more easily cut off, and then improve operation efficiency, shorten the operating time.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic structural view of one embodiment of an ultrasonic cutting tool according to the present application;

FIG. 2 is a schematic view of the structure of a single pyramidal serration of an ultrasonic cutting tool according to the present application;

FIG. 3 is an exemplary schematic view of an ultrasonic cutting tool in a curved configuration according to the present application;

FIG. 4 is an exemplary schematic view of an integrally formed ultrasonic cutting tool according to the present application;

FIG. 5 is an exemplary schematic view of a threaded connection and curved configuration ultrasonic cutting tool according to the present application;

FIG. 6 is an exemplary schematic illustration of an anti-stick coating for an ultrasonic cutting tool according to the present application;

FIG. 7 is a schematic structural diagram of one embodiment of an ultrasonic surgical instrument according to the present application.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the relevant portions of the related inventions are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Fig. 1 shows a schematic structural view of an embodiment of the ultrasonic cutting tool of the present application. As shown in fig. 1, the ultrasonic cutting tool 100 includes: the ultrasonic tool comprises a tool bar 101 and an ultrasonic transducer 102, wherein the tool bar 101 comprises a working head 1011, a neck 1012 and a connecting part 1013, the connecting part 1013 is connected with the ultrasonic transducer 102, the interior of the tool bar 101 and the interior of the ultrasonic transducer 102 are provided with a first through hole 103 along the axial direction, and the top end section of the working head 1011 is provided with saw teeth 10111.

The ultrasonic transducer 102 converts electric energy into ultrasonic vibration energy and transmits the ultrasonic vibration energy to the tool holder 101, and the working head 1011 of the tool holder 101 can output the ultrasonic energy to soft tissues such as bones and skin to cut the soft tissues.

The shape of the cross section of the working head 1011 may be provided in various shapes such as a circle, an ellipse, a polygon, a spoon, and the like.

In the present embodiment, the interior of the tool holder 101 and the ultrasonic transducer 102 is provided with a first through hole 103 in the axial direction. The first through hole 103 is used for circulating a fluid to cool the transducer and the tool shaft, while flushing bone debris from the working head or sucking emulsified soft tissue. In addition, since the first through hole is provided, the working head 1011 has a hollow structure, and the area of the top end section is smaller. Thereby increasing the local stress intensity of the cut bones, soft tissues and other parts and improving the cutting efficiency. Alternatively, the inner diameter of the cross section of the tip end of the working head 1011 is generally in the range of 0.7mm to 2.5mm, and correspondingly, the outer diameter is generally set in the range of 1.2mm to 3.5 mm. This scope can make liquid more unobstructed flow in first through-hole, and can make the cutter arbor can not lead to the volume heavy because of the external diameter is too big simultaneously.

In the present embodiment, the shape of the serrations 10111 on the tip cross-section may be various shapes, such as wave, square, triangle, and the like.

In some optional implementations of the present embodiment, the serrations 10111 are pyramidal serrations. As shown in fig. 2, which shows a schematic view of the structure of a single pyramidal serration. The pyramid-shaped sawteeth are adopted, so that the contact area between the working head and the cut part is smaller, the local stress of the cut part is larger, the cutting efficiency is improved, and the operation time is shortened. Optionally, the height h of the pyramid-shaped saw teeth can be set to be within the range of 0.2mm-1.5mm, the pyramid-shaped saw teeth are highly located within the range, the tips of the saw teeth can be fully utilized, the contact area between the top end of the working head and the cut part cannot be increased due to the fact that the height of the saw teeth is too small, and the mechanical strength of the saw teeth cannot be reduced due to too large height of the saw teeth.

In some alternative implementations of the present embodiment, as shown in FIG. 3, the neck 1012 is a curved structure. The ultrasonic cutting tool with the bending structure can prevent the cutter bar from blocking the sight of an operator during operation, can also reduce the contact chance of a working head and a cutting wound, and improves the operation safety.

In some alternative implementations of the present embodiment, as shown in fig. 3, the bending angle α of the neck 1012 is equal to or less than 45 degrees. Generally, when the bending angle is more than 45 degrees, the ultrasonic energy may cause a large energy loss at the change of direction due to an excessively large bending angle, thereby reducing the energy conducted to the tool holder. Therefore, the realization mode can reduce the loss of the ultrasonic energy at the direction change position and improve the output efficiency of the ultrasonic energy.

The tool holder 101 and the ultrasonic transducer 102 may be coupled together in various ways. For example, the tool holder 101 may be fixed to the ultrasonic transducer 102 by welding, screwing, or the like.

In some alternative implementations of the present embodiment, the tool holder 101 and the ultrasonic transducer 102 are integrally formed. As shown in fig. 4, an exemplary schematic view of an ultrasonic cutting tool in an integrally formed manner is shown. Fig. 4a is an exemplary view of a straight structure of the tool bar, and fig. 4b is an exemplary view of a curved structure of the tool bar. The ultrasonic cutting tool in an integrated forming mode can reduce the loss of ultrasonic energy in the transmission process caused by the connection of various components. In addition, the cutter bar 101 and the ultrasonic transducer 102 are not required to be connected by an operator before use, so that the use is convenient.

In some alternative implementations of the present embodiment, the tool bar 101 and the ultrasonic transducer 102 are detachably connected by a connection part 1013. As an example, the connection means may be a threaded connection. As shown in fig. 1, an exemplary schematic diagram of a tool bar 101 and an ultrasonic transducer 102 which are connected by a screw thread and have a linear structure is shown. As shown in fig. 5, an exemplary schematic diagram of a tool bar 101 and an ultrasonic transducer 102 which are connected by a screw thread and have a curved structure is shown. This implementation mode links together cutter arbor 101 and ultrasonic transducer 102 through detachable mode, can conveniently dismantle, change, operation such as washing, improves ultrasonic cutting tool's installation flexibility, reduces the maintenance cost.

Optionally, the surface of the connecting portion 1013 includes at least one flat surface. The plane can be used for placing tools such as a wrench and the like, and is convenient for disassembling and assembling the cutter bar 101 and the ultrasonic transducer 102. As shown in fig. 1, the cross-sectional shape of the connecting portion 1013 is hexagonal.

In some alternative implementations of this embodiment, the cross-sectional area of the neck 1012 decreases from the end distal to the working head 1011 to the end proximal to the working head 1011, and the cross-sectional area of the working head 1011 decreases from the end proximal to the neck 1012 to the tip of the working head 1011. This implementation mode can make neck 1012 and work head 1011 present the approximate toper shape to can make the amplitude of the top of cutter arbor bigger, the ultrasonic energy of output is bigger promptly, has improved the transmission efficiency of ultrasonic energy.

In some alternative implementations of the present embodiment, as shown in fig. 1, the side of the working head 1011 includes a second through hole 10112. The second through hole 10112 may be various shapes such as a circle, an ellipse, a rectangle, a rounded rectangle, etc. When the second through-hole is circular, its diameter is generally set to be less than 1.5 mm. The second through hole 10112 is beneficial to the working head to generate larger amplitude during working, and enables liquid to flow through, so that the effects of cooling and flushing the two sides of the working head are achieved, and the operation efficiency is improved. It should be noted that the number of the second through holes may be one or multiple, and the embodiment of the present application is not limited.

In some alternative implementations of the present embodiment, as shown in fig. 6, the surface of the cut portion of the working head 1011 is provided with an anti-adhesive coating 10113. The anti-adhesive coating 10113 may prevent the working head from binding soft tissue and/or blood during cutting, thereby preventing failure of the bone and/or tissue cutting and vessel sealing during operation of the ultrasonic cutting tool.

Alternatively, the anti-adhesive coating may comprise a polymeric material. The cost of the polymer material is lower, and the manufacturing cost of the ultrasonic cutting tool can be reduced. The anti-sticking coating may be composed of at least one of the following materials: copolymer of tetrafluoroethylene TFE and hexafluoropropylene HFP FEP, liquid FEP, FEP/ceramic composite, liquid FEP ceramic epoxy composite, polytetrafluoroethylene PTFE and or PTFE/ceramic composite.

Optionally, the anti-adhesion coating is comprised of tungsten disulfide, molybdenum disulfide, graphite, and a fluorinated polymer. The anti-adhesion coating in the implementation mode is made of polymer materials and other inorganic materials, so that the mechanical strength of the anti-adhesion coating can be improved, the service life of the anti-adhesion coating is prolonged, and the service life of the cutter bar is prolonged.

Optionally, the anti-bonding coating may comprise a ceramic material, and the ceramic material comprises at least one of: chromium carbide, tungsten carbide, titanium nitride, aluminum oxide, and chromium nitride. The ceramic material has high mechanical strength and is not easy to damage, and the service life of the ultrasonic cutting tool can be prolonged.

Alternatively, the anti-adhesion coating may comprise a metal. Wherein the metal comprises at least one of: aluminum, stainless steel, and molybdenum. Because the mechanical strength of metal is high, ductility is strong, adopts metal material's anti-adhesion coating, can improve the toughness of anti-adhesion coating, reduces and damages the probability, improves the life of cutter arbor.

The utility model provides an ultrasonic cutting tool, through setting the cutter arbor to including the work head, neck and connecting portion, cutter arbor and ultrasonic transducer's inside sets up to hollow structure, and set up the sawtooth on the top cross-section of work head, thereby can be when using ultrasonic cutting tool to cut, make the top of work head and the skeleton by the cutting, the area of contact at positions such as soft tissue is littleer, thereby it is bigger to use the local dynamics by the cutting position, make by the cutting position more easily cut off, and then improve operation efficiency, shorten operation time.

Referring further to FIG. 7, a schematic structural diagram of one embodiment of an ultrasonic surgical instrument 700 of the present application is shown. The ultrasonic surgical instrument 700 includes: the ultrasonic scalpel comprises an ultrasonic scalpel main body 701, an excitation switch 702 and an ultrasonic scalpel handle 703, wherein the ultrasonic scalpel handle comprises the ultrasonic cutting tool 7031 described in the embodiment of fig. 1, and the ultrasonic scalpel main body is respectively connected with the excitation switch and/or the ultrasonic scalpel handle. The ultrasonic-blade main unit can perform functional configuration on the ultrasonic-blade handle 703, for example, setting output energy and the like. The ultrasonic blade activation switch may include, but is not limited to, at least one of: foot switches, hand switches, etc.

The ultrasonic surgical instrument provided by the above embodiment of the present application, by introducing the ultrasonic cutting tool described in the embodiment shown in fig. 1, when an operation is performed using the ultrasonic surgical instrument tool, the contact area between the top end of the working head and the bone, soft tissue, and the like to be cut is smaller, so that the local force applied to the cut part is larger, the cut part is cut off more easily, the operation efficiency is improved, and the operation time is shortened.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. An ultrasonic cutting tool, comprising: the cutter bar comprises a cutter bar (101) and an ultrasonic transducer (102), wherein the cutter bar (101) comprises a working head (1011), a neck (1012) and a connecting part (1013), the connecting part (1013) is connected with the ultrasonic transducer (102), a first through hole (103) is formed in the cutter bar (101) and the ultrasonic transducer (102) along the axial direction, and sawteeth (10111) are arranged on the cross section of the top end of the working head (1011).

2. The ultrasonic cutting tool according to claim 1, wherein the serrations (10111) are pyramid-shaped serrations.

3. The ultrasonic cutting tool according to claim 1, wherein the neck (1012) is a curved structure.

4. The ultrasonic cutting tool according to claim 2, wherein the bending angle of the neck (1012) is 45 degrees or less.

5. The ultrasonic cutting tool according to claim 1, wherein the blade bar (101) and the ultrasonic transducer (102) are integrally formed.

6. An ultrasonic cutting tool according to claim 1, characterized in that the blade bar (101) and the ultrasonic transducer (102) are detachably connected by the connection part (1013).

7. The ultrasonic cutting tool according to claim 1, wherein the cross-sectional area of the neck (1012) gradually decreases from an end distal from the working head (1011) to an end proximal to the working head (1011), and the cross-sectional area of the working head (1011) gradually decreases from an end proximal to the neck (1012) to a tip of the working head (1011).

8. The ultrasonic cutting tool according to claim 1, wherein the side of the working head (1011) comprises a second through hole (10112).

9. An ultrasonic cutting tool according to any of claims 1-8, characterized in that the surface of the cutting part of the working head (1011) is provided with an anti-adhesive coating (10113).

10. An ultrasonic surgical instrument, comprising: an ultrasonic scalpel host (701), an excitation switch (702), and an ultrasonic scalpel handle (703), wherein the ultrasonic scalpel handle comprises the ultrasonic cutting tool (7031) of any one of claims 1-9, the ultrasonic scalpel host being connected to the excitation switch and the ultrasonic scalpel handle, respectively.