WO2015188735A1

WO2015188735A1 - Ultrasonic bone cutter blade head and ultrasonic bone cutter having same

Info

Publication number: WO2015188735A1
Application number: PCT/CN2015/081002
Authority: WO
Inventors: 曹群; 李春媛
Original assignee: 曹群
Priority date: 2014-06-10
Filing date: 2015-06-08
Publication date: 2015-12-17
Also published as: CN204133551U

Abstract

An ultrasonic bone cutter blade head (100) and an ultrasonic bone cutter having said blade head. The ultrasonic bone cutter blade head comprises: a blade rod (2) and a blade head end part (1), one end of the blade head end part (1) being connected to the blade rod (2), the blade head end part (1) forming a hook shape and comprising a hook tip (11), a hook handle (13), and a hook-shaped connecting part (12) being connected between the hook tip (11) and the hook handle (13), the hook handle (13) being connected to the blade rod (2), and the inner side edge and the outer side edge of the hook-shaped connecting part (12) are respectively toothed.

Description

Ultrasonic bone cutter head and ultrasonic bone cutter with the same

Technical field

The present invention relates to the field of medical device technology, and in particular to an improved ultrasonic bone cutter head and an ultrasonic bone knife having the same.

Background technique

In orthopedic surgery, the bone is often cut, ground, planed, scraped, or arbitrarily shaped using an ultrasonic bone knife. 1A shows a typical structure of a conventional ultrasonic bone cutter head 100' which has a multi-toothed shape with a wide tip portion and a large portion of the cutting edge portion which is not an effective main cutting portion, as shown in the figure. Shown in 1B.

However, such an ultrasonic bone cutter head 100' has the following problems. As shown in Fig. 2A, when the ultrasonic bone cutter head 100' is used, the bone 200' is biased toward the bone tissue as shown by F1 in Fig. 2A. When cutting is required, the ultrasonic bone cutter head 100' requires a force directed downwardly toward the bone tissue, which not only results in slow cutting speed, inefficiency, but also tends to cause the multi-toothed cutter head to break during operation. As shown by F2 in Fig. 2B. However, this may cause accidental insertion into the soft tissue 300' such as the spinal cord during the operation, resulting in irreparable damage to the operator. In addition, the ultrasonic bone cutter head 100' has a complicated shape, is difficult to process, and has high production cost.

Summary of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art.

To this end, the present invention needs to provide an ultrasonic bone cutter head that not only uses high efficiency but also has a high cutting speed to reduce the operation time.

Further, the present invention needs to provide an ultrasonic bone cutter head, which is accurate in positioning when cutting, thereby improving the success rate of the operation.

Furthermore, the present invention also needs to provide an ultrasonic osteotome comprising an ultrasonic bone cutter head as described above.

An ultrasonic bone cutter head according to an embodiment of the present invention includes: a cutter bar; and a cutter head end, the cutter head end being coupled to the cutter bar, and the cutter head end being hook-shaped and including a hook tip and a hook a handle and a hook-shaped connecting portion connected between the hook tip and the hook handle, wherein the hook handle is connected to the cutter bar, and an inner edge and an outer edge of the hook-shaped connecting portion are respectively toothed .

In the ultrasonic bone cutter head according to the embodiment of the present invention, since the cutting can be performed with the hook tip, the efficiency is high and the operation time is short, thereby reducing the labor intensity of the medical staff. In addition, accurate positioning during cutting, without slipping, can improve the success rate of surgery. In addition, the ultrasonic bone cutter head according to the embodiment of the invention is exquisitely designed, can accurately control the cutting amount and shape of the bone, and reduce the amount of bone loss during the operation. Further, with an ultrasonic bone cutter head according to an embodiment of the present invention There is a hemostatic coagulation effect during the osteotomy, which reduces the amount of intraoperative blood loss. Further, the ultrasonic bone cutter head according to the embodiment of the present invention has low processing difficulty and low production cost. At the same time, since not only the inner edge of the toothed shape can be used for cutting, but also the outer edge of the toothed shape can be used for cutting, the use convenience of the ultrasonic bone cutter head is improved.

In addition, the ultrasonic bone cutter head according to the present invention has the following additional technical features:

According to an embodiment of the invention, the tip end is configured as a flat hook.

According to an embodiment of the invention, the cross section of the stalk gradually becomes larger from the hook-shaped connecting portion toward the arbor.

According to an embodiment of the invention, the other end of the cross-sectional hook valley of the hook tip is connected to the wide end of the hook tip.

According to an embodiment of the present invention, the ultrasonic bone cutter head further includes a blade body, the blade body is connected to the knife bar, and a joint of the blade bar and the blade body is a circular arc transition, and the blade body is formed There are wrenches.

According to an embodiment of the invention, the shank is integrally formed with the tip end.

According to an embodiment of the invention, the hook tip, the hook handle and the hook-shaped connecting portion are integrally formed.

According to an embodiment of the invention, the adjacent tooth pitches of the teeth formed on the inner side of the hook-shaped connecting portion gradually become larger from the hook tip toward the hook shank.

According to a second aspect of the present invention, a hook-shaped ultrasonic bone cutter head is provided, comprising a cutter rod and a head end, one end of the head end being connected to one end of the cutter rod, the head end being hook-shaped, and the hook shape including a hook tip and a hook Valley and stalk, the edge of the hook is toothed.

According to a third aspect of the invention, there is further provided an ultrasonic osteotome comprising an ultrasonic bone cutter head as described above.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1A is a schematic view showing the structure of an ultrasonic bone cutter head in the prior art.

1B is a partially enlarged schematic view showing a portion A of FIG. 1A.

2A, 2B show schematic views of the operation of a prior art ultrasonic bone cutter bit.

3 is a perspective view showing the structure of an ultrasonic bone cutter head according to an embodiment of the present invention.

4 is a front elevational view of an ultrasonic bone cutter bit of one embodiment of the present invention.

Figure 5 is a top plan view of an ultrasonic bone cutter head of one embodiment of the present invention.

Fig. 6 is a partially enlarged schematic view showing a portion B of Fig. 4.

Figure 7 is a schematic illustration of the state of use of an ultrasonic bone cutter bit in accordance with one embodiment of the present invention.

Figure 8 is a schematic illustration of another state of use of an ultrasonic bone cutter bit in accordance with one embodiment of the present invention.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The following reference The embodiments described in the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the orientations or positions of the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outside", etc. are understood. The relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplification of the description, and does not indicate or imply that the device or component referred to has a specific orientation, is constructed and operated in a specific orientation, and thus It is not to be understood as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" and "second" may include one or more of the features either explicitly or implicitly. In the description of the present invention, "a plurality" means two or more unless otherwise stated.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components. The specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.

The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

An ultrasonic bone cutter head 100 according to an embodiment of the present invention will now be described with reference to the accompanying drawings, wherein FIG. 3 is a perspective structural view of an ultrasonic bone cutter head 100 according to an embodiment of the present invention; A front view of an ultrasonic bone cutter head 100 of one embodiment; and Figure 5 is a top plan view of an ultrasonic bone cutter head of one embodiment of the present invention.

After years of research, the inventors have found that improving the structural shape of the ultrasonic bone cutter head 100 can significantly improve the safety and efficiency of use of the ultrasonic bone cutter head. As shown in FIG. 3, the ultrasonic bone cutter head 100 can include a tip end 1 and a shank 2, in accordance with an embodiment of the present invention. The cutter head end 1 is connected to the cutter bar 2, and the cutter head end portion 1 is hook-shaped and includes a hook tip 11, a hook handle 13 and a hook-shaped connecting portion connected between the hook tip 11 and the hook handle 13. 12, as shown in Figure 3-6.

According to an embodiment of the invention, the tip end 1 is of a flat hook shape, as shown in Fig. 5, the tip end 1 comprises a hook tip 11, a hook or hook connection 12 and a stalk 13 , as shown in Figure 6. The shank 13 is connected to the shank 2, and the inner edge of the hook-shaped connecting portion 12 is toothed, and the outer edge of the hook-shaped connecting portion 12 is toothed, that is, the outer edge of the hook-shaped connecting portion 12 is provided with a plurality of grooves. 14. A tooth is defined between adjacent grooves, and the plurality of grooves define a plurality of teeth such that the outer edge of the hook-shaped connecting portion 12 is toothed. Therefore, when the ultrasonic bone cutter head 100 is used, not only the toothed inner edge of the hook-shaped connecting portion 12 can be used for grinding the bone, but also the toothed outer edge of the hook-shaped connecting portion 12 can be used for grinding the bone. The use convenience of the ultrasonic bone cutter head 100 is improved. As shown in Fig. 5, the cross section of the stalk 13 is gradually increased from the hook-shaped connecting portion 12 toward the shank 2, whereby the cantilever strength of the stalk is enhanced during the operation.

According to an embodiment of the invention, the cross section of the hook tip 11 tapers in a direction toward the hook-shaped connecting portion 12. Thereby, in the cutting process, the hook tip 11 is used to speed up the cutting speed, and since it is a hook tip, the positioning is accurate at the time of cutting, and the slip phenomenon does not occur, so that the success rate of the surgery can be improved.

According to an embodiment of the invention, the ultrasonic bone cutter head further comprises a blade body 3, the knife bar 2 is connected to the blade body 3, the knife bar 2 and the blade body 3 are transitioned by a circular arc, and the connecting end of the blade body 3 is provided with a connecting thread 4. According to an embodiment of the invention, the blade body 3 is formed with a wrench bit 5, for example a regular hexagon, whereby it can be fixed or tightened with a tool such as a wrench during assembly. In use, when the connecting thread 4 of the tip end of the embodiment is connected to an ultrasonic transducer (not shown) and tightened with a corresponding wrench, and then the ultrasonic transducer is connected to the ultrasonic host, the operation can be performed. jobs. As shown in FIG. 4, according to an embodiment of the present invention, the shank 2 and the tip end portion 1 can be integrally formed, thereby reducing manufacturing costs. Further, the tip end 1, the shank 2 and the blade 3 may be integrally formed.

As shown in Fig. 6, among the teeth formed on the inner side of the hook-shaped connecting portion 12, the tooth pitch D of the adjacent teeth gradually becomes larger from the hook tip toward the hook shank.

A method of using an ultrasonic bone cutter bit in accordance with one embodiment of the present invention will now be described with reference to Figures 7-8.

When the bone is required to be cut, when the hook-shaped ultrasonic bone cutter head 100 is used for operation, it can be used like a hook hook, or can be used like a sickle, and other random techniques, the hook of the hook end 1 The tip 11 can be directly used for cutting, and when the hook tip 11 is used for cutting, the hook handle 13 acts as a latching position, thereby ensuring the cutting depth of the cutter head and protecting the surrounding bone tissue, thereby conveniently positioning and operating the ultrasonic bone cutter. The cutter head 100. Since the tip end 1 is configured in the form of a flat hook, it is also convenient for the user to position during use.

In accordance with an embodiment of the present invention, in use, the hook tip 11 can also be used for a latching action against the upper or lower edge of the bone, and the toothed inner edge of the hook-shaped connecting portion 12 cuts the bone. At this time, the hook handle and the hook tip are simultaneously locked. The direction of force is parallel to the bone surface or backward. This forms a fulcrum with the hook tip 11 during the cutting process and cuts along this fulcrum. The advantage of this structure is that it can protect the surrounding tissue, and the cutting depth and thickness can be precisely controlled during the cutting process.

When used during surgery, the hook tip can be inserted between the dura mater and the vertebral body (bone) to be removed. As shown in Fig. 7, the hook tip 11 forms a fulcrum against the bone 200, and the direction of the force is from the inward direction. External operation, thereby reducing the risk of accidental damage to the soft tissue 300 such as the dura mater, thereby avoiding irreversible permanent damage to the spinal cord tissue, reducing the risk of surgery and reducing the difficulty of operation, especially for the whole The bone is removed from the block and the removed bone can be reset. Figure 8 shows the bone 200 being pushed from right to left with a hook-shaped ultrasonic bone cutter bit 100. Since the hook tip 11 is a fulcrum at this time and the force is from left to right, even if detachment occurs, the ultrasonic bone cutter head 100 It will also go outwards to avoid harming soft tissue 300.

Further, the present invention also provides an ultrasonic osteotome comprising the ultrasonic bone cutter head as described above, which can be cut with a hook tip, has high efficiency and short operation time, thereby reducing medical personnel's Labor intensity, accurate positioning when cutting, no slipping, can improve the success rate of surgery. In addition, the ultrasonic bone knife design fine according to the embodiment of the present invention The compact size allows precise control of the amount and shape of the bone and reduces the amount of bone loss during surgery. In addition, the ultrasonic osteotome according to the embodiment of the present invention has a hemostatic coagulation effect during the osteotomy, and reduces the amount of intraoperative blood loss. Further, the ultrasonic bone cutter head according to the embodiment of the present invention has low processing difficulty and low production cost.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. Particular features, structures, materials or features described in the examples or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

An ultrasonic bone cutter head characterized by comprising:

Arbor; and

a cutter head end, the cutter head end being coupled to the cutter bar, and the cutter head end is hook-shaped and includes a hook tip, a hook handle, and a hook shape connected between the hook tip and the hook handle Connection, where

The shank is connected to the arbor, and the inner edge and the outer edge of the hook-shaped connecting portion are respectively toothed.
The ultrasonic bone cutter head according to claim 1, wherein the tip end is configured in a flat hook shape.
The ultrasonic bone cutter head according to claim 2, wherein a cross section of the hook shank gradually becomes larger from a direction in which the hook-shaped connecting portion faces the arbor.
The ultrasonic bone cutter head according to claim 3, wherein the cross section of the hook tip gradually becomes larger in a direction toward the hook-shaped connecting portion.
The ultrasonic bone cutter bit according to any one of claims 1 to 4, further comprising a blade body, wherein the blade body is coupled to the blade bar and the connection between the blade bar and the blade body is an arc In the transition, a wrench position is formed on the knife body.
The ultrasonic bone cutter bit of claim 1 wherein said shank is integrally formed with said tip end.
The ultrasonic bone cutter head according to claim 5, wherein the cutter head end, the cutter bar and the blade body are integrally formed.
The ultrasonic bone cutter bit according to claim 1, wherein among the teeth formed on the inner side of the hook-shaped connecting portion, the tooth pitch of the adjacent teeth gradually increases from the hook tip toward the hook shank Become bigger.
An ultrasonic bone cutter head, comprising: a cutter rod and a head end, one end of the head end is connected with one end of the cutter rod, the head end is a hook shape, and the hook shape comprises a hook tip, a hook valley and a hook handle, and the hook edge It is toothed.
An ultrasonic osteotome comprising an ultrasonic bone cutter head according to any of claims 1-9.