CN213552129U - Ultrasonic osteotome head for spinal surgery - Google Patents

Abstract

The utility model provides a from supersound osteotome tool bit of taking spinal surgery operation of angle to use relates to the technical field of spinal surgery operation supersound osteotome, and it is single to have solved among the prior art supersound osteotome tool bit form that spinal surgery operation used, operates the big technical problem of the degree of difficulty when the ossification piece in excision spinal canal dura mater the place ahead. The ultrasonic osteotome head for the spinal surgery comprises a head long shaft section and a head cutting section, wherein the head cutting section is flat, and an included angle is arranged at the joint between the head cutting section and the long shaft section so as to enable the head cutting section and the long shaft section to form a rake shape. The tool bit is from taking the angle, and when spinal column surgical operations such as the excision of the posterior longitudinal ligament ossification piece of thoracic vertebra, tool bit cutting segment can deviate the tool bit major axis section direction and walk around the dura mater and touch the ossification piece in dura mater dead ahead to in the excision is located the unable bone ossification piece of seeing straight ahead in dura mater the place ahead, reaches thoroughly excises the ossification piece, removes the spinal cord oppression, reduces the purpose of spinal cord injury risk simultaneously.

Description

Ultrasonic osteotome head for spinal surgery

Technical Field

The utility model relates to a technical field of backbone surgery operation supersound osteotome especially relates to an supersound osteotome tool bit that backbone surgery operation was used.

Background

With the development of medical technology, the requirements of surgery on precision and safety of surgery are gradually increased, and while the surgical skill of a surgeon is enhanced, the unique advantages of novel surgical instruments are gradually favored by the surgeon. The ultrasonic osteotome surgical system is a novel and efficient surgical instrument for safely and effectively completing osteotomy and bone plastic surgery by cutting calcified tissues and bone tissues by utilizing mechanical fragmentation effect and cavitation effect, and has the advantages of tissue selectivity, good hemostatic performance, small damage to soft tissues such as peripheral vascular nerves, low heat production, easy operation and the like, so that the ultrasonic osteotome surgical system is widely applied to the fields of stomatology, otolaryngology, neurosurgery, plastic cosmetology and the like. In recent years, ultrasonic osteotomes are gradually replacing traditional orthopedic osteotomy tools, are widely applied to orthopedic surgeries, particularly spinal surgeries, and show good superiority in vertebral revision surgeries, full vertebral plate resections, osteotomy orthopedics and osteotomies in cervical and thoracic vertebra regions.

The ultrasonic osteotome is an operation tool which converts electric energy into mechanical energy through a piezoelectric conversion device so that a titanium alloy cutting section is in a high-frequency resonance mode, and utilizes the strong mechanical acceleration of the cutting section to crush and cut target bone tissues. The ultrasonic osteotome head is different from the traditional orthopedic instruments, the maximum energy transfer can be realized only by the fact that the tool bit of the ultrasonic osteotome and the contacted tissues of the ultrasonic osteotome head need to achieve resonance and impedance matching, the impedance difference between the bone tissues and the soft tissues is very large, the osteotome can not cause obvious injury when touching the soft tissues in a short time, and therefore the ultrasonic osteotome can not cause fragmentation and damage to the adjacent soft tissues when cutting the bone tissues or ossification objects, and the safety of the operation is improved. For the surgeon, the most central and critical component of the overall device in use is the cutting head. The different surgical sites have different cutting targets and different requirements on the shape and function of the cutter head. Clinical researches in recent years find that the design types of the tool bits of the ultrasonic osteotome products for the spine surgery in China are limited, especially the tool bits are single in shape, and the clinical various surgical operation requirements of the spine surgery cannot be completely met. For example, posterior longitudinal ligament ossification of thoracic vertebra is a common clinical disease in spinal surgery, and a diseased spinal structure, referring to fig. 1, the ligament ossification in front of the spinal cord generates compression to the spinal cord backwards, and the posterior operation adopts a 'culvert method' and can achieve the purpose of completely relieving the spinal cord compression by cutting all ossification blocks in front around the spinal cord. Referring to fig. 2 and 3, however, the cutting section of the conventional ultrasonic osteotome head is mostly a straight cutting section without any obvious angle, and the cutting section of the conventional ultrasonic osteotome head is often difficult to touch the ossification block right in front of the dura mater, so that the ossification block in front of the dura mater is difficult to completely and thoroughly cut, and the operation effect is affected. Therefore, the ultrasonic osteotome head which is closely combined with clinic and is more suitable for the specific operation needs is required to be designed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an one of them purpose provides an supersound osteotome head that spinal surgery used, has solved among the prior art supersound osteotome head form single that spinal surgery used, operates the big technical problem of the degree of difficulty when the ossification piece in excision spinal canal dura mater the place ahead. The utility model discloses preferred technical scheme can reach a great deal of beneficial technological effect, specifically see the following explanation.

In order to achieve the above purpose, the utility model provides a following technical scheme:

supersound osteotome tool bit that spinal surgery used include tool bit major axis section and tool bit cutting segment, the tool bit cutting segment is the platykurtic, tool bit cutting segment is connected with tool bit major axis section, and be provided with the contained angle between tool bit cutting segment and the tool bit major axis section.

According to the utility model relates to a further preferred technical scheme, the width direction of tool bit cutting segment and the length direction mutually perpendicular of tool bit major axis section.

According to the utility model relates to a further preferred technical scheme, the contained angle between tool bit cutting segment and the tool bit major axis section is 120 ~ 130.

According to the utility model relates to a further preferred technical scheme, contained angle between tool bit cutting segment and the tool bit major axis section is 125.

According to the utility model relates to a further preferred technical scheme, tool bit cutting segment and tool bit major axis section junction are the arc.

According to the utility model relates to a further preferred technical scheme, the width of tool bit cutting segment is increased to the one end of keeping away from tool bit long axis section gradually by the one end that is close to tool bit long axis section.

According to the utility model relates to a further preferred technical scheme, the one end that the tool bit major axis section was kept away from to tool bit cutting segment sets up to the arc terminal surface.

According to the utility model relates to a further preferred technical scheme, tool bit cutting segment is kept away from tool bit major axis section and is provided with the sword tooth, and the sword tooth is including openly and the back, and the front of sword tooth is located the ventral side or the dorsal part of tool bit cutting segment and tool bit major axis section contained angle.

According to the utility model relates to a further preferred technical scheme, the thickness of tool bit cutting segment reduces to the one end of keeping away from tool bit long axis section by the one end that is close to tool bit long axis section gradually.

According to the utility model relates to a further preferred technical scheme, tool bit major axis section is cylindrical, and the one end that tool bit cutting segment is close to tool bit major axis section is the circular terminal surface with tool bit major axis section looks adaptation to make tool bit cutting segment and tool bit major axis section surface smooth connection.

The utility model provides a from supersound osteotome tool bit of taking spinal surgery operation of angle to use has following beneficial technological effect at least:

a supersound osteotome head from taking angle for spinal surgery, from taking angle between tool bit cutting segment and the tool bit major axis section, when spinal surgery, tool bit cutting segment can skew tool bit major axis segment length direction and touch the ossification piece in the positive place ahead of dura mater, is convenient for excise the ossification piece in dura mater the place ahead. And, because from taking the angle between tool bit cutting segment and the tool bit major axis section, and then form harrow column structure at tool bit cutting segment department, and then excise the ossification piece when being convenient for operate, for example when backbone surgery operations such as posterior longitudinal ligament ossification piece excision behind the thoracic vertebra, tool bit cutting segment can deviate the tool bit major axis section direction and walk around the dura mater and touch the ossification piece just in the place ahead of dura mater, be convenient for like this excise the ossification piece that can't look directly to that is located dura mater ahead, reached and thoroughly relieved the oppression of ossification piece to dura mater and reduced the risk of spinal cord injury simultaneously.

Furthermore, the utility model discloses preferred technical scheme can also produce following technological effect:

the utility model discloses preferred technical scheme be used for spinal surgery's supersound osteotome tool bit from taking the angle, contained angle between tool bit cutting segment and the tool bit major axis section is 125. Because the supersound osteotome tool bit cutting segment that is used for spinal surgery among the prior art is mostly titanium alloy material and makes, if set up the too big intensity that can reduce the position of moving of contained angle between tool bit cutting segment and tool bit major axis section, ultrasonic vibration probably leads to the tool bit fracture in the use. Through the clinical trial research in the early stage, the condition that the moving parts of the cutting section and the long shaft section of the cutter head are broken when the included angle between the cutting section and the long shaft section of the cutter head is reduced to below 125 degrees is found. The smaller the included angle between the cutting section of the cutter head and the long shaft section of the cutter head is, the more convenient the removal of the ossification block is. So when the contained angle between tool bit cutting segment and the tool bit major axis section sets up to 125, the tool bit not only has corresponding intensity, can not break off in the use, can also be convenient for the excision of the ossification piece in dura mater dead ahead.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic illustration of a prior art "culvert" surgical procedure;

FIG. 2 is a schematic view of a ligamentous ossification block anterior to the spinal cord;

FIG. 3 is a schematic view of a conventional ultrasonic osteotome head "culvert" in operation for spinal surgery;

FIG. 4 is a schematic view of a preferred embodiment of the present invention in a "culvert method" operation with angled ultrasonic osteotome head;

FIG. 5 is a schematic view of a preferred embodiment of the present invention after cutting a ossified mass by a "culvert method" with an angled ultrasonic osteotome head;

FIG. 6 is a three-dimensional schematic view of a first perspective of a cutting section of a preferred embodiment ultrasonic osteotome head of the present invention;

FIG. 7 is a three-dimensional schematic view of a second perspective of a cutting section of a preferred embodiment ultrasonic osteotome head of the present invention;

FIG. 8 is an enlarged schematic view of a cutting section of a preferred embodiment ultrasonic osteotome head of the present invention;

FIG. 9 is a schematic view of a preferred embodiment of the present invention with the cutting segment teeth on the front side of the included angle between the cutting segment and the major axis segment of the cutting head;

fig. 10 is a schematic view of a preferred embodiment of the present invention, showing the front side of the teeth of the cutting segment of the cutting head positioned at the back side of the angle between the cutting segment and the long axis segment of the cutting head.

In the figure: 1-a long shaft section of a cutter head; 11-a connecting segment; 12-a reinforcement section; 2, cutting the section by a cutter head; 3-cutter teeth; 4-mounting the section; and 5, clamping a positioning section.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 4 to 8, an ultrasonic osteotome head for spinal surgery according to a preferred embodiment includes a head long axis segment 1 and a head cutting segment 2, the head cutting segment 2 is flat, the head cutting segment 2 is connected to the head long axis segment 1, and an included angle is formed between the head cutting segment 2 and the head long axis segment 1. Preferably, the cutting segment 2 and/or the long segment 1 are provided with a bend. Preferably, a bent part is arranged at the joint of the tool bit long axis segment 1 and the tool bit cutting segment 2, so that an included angle is formed between the length direction of the tool bit cutting segment 2 and the length direction of the tool bit long axis segment 1.

In a preferred embodiment, the joint of the cutting section 2 and the long section 1 is provided with a bent part. Preferably, the long shaft segment 1 of the cutter head is connected with the cutting segment 2 of the cutter head through an arc-shaped bent part.

As another preferred embodiment, the cutter head cutting segment 2 is curved, so that the end of the cutter head cutting segment 2 away from the cutter head long shaft segment 1 forms an included angle with the length direction of the cutter head long shaft segment 1.

The invention of the preferred embodiment is that an included angle is formed between the cutter head cutting section 2 and the cutter head long shaft section 1, so that the ultrasonic osteotome cutter head forms a rake-shaped structure, when the ossification block is resected, the end part of the cutter head cutting section 2 can bypass the spinal cord to resect the ossification block below the spinal cord, so that the compression of the ossification block on the spinal cord is safely and effectively relieved, and the risk of spinal cord injury in the operation is reduced.

Referring to fig. 6 and 7, as a further preferred embodiment of the present invention, the width direction of the bit cutting section 2 is perpendicular to the length direction of the bit long axis section 1. It should be noted that the width direction of the cutting portion 2 of the tip and the length direction of the long axis portion 1 of the tip, which are shown by the dotted lines in fig. 7, should be regarded as two mutually perpendicular and non-intersecting straight lines in a three-dimensional space, and they cannot be seen as a planar figure.

As a preferred embodiment, the tool bit long axis segment 1 comprises a connecting segment 11 and a reinforcing segment 12. Preferably, the connecting section 11 is provided in an arc shape so that the long axis segment 1 of the cutter head connected to both ends of the connecting section 11 forms an included angle with the cutting section 2 of the cutter head. It is further preferable that the diameter of the reinforcing section 12 is larger than that of the connecting section 11, so that the bending strength of the long shaft section 1 of the cutter head is enhanced by the reinforcing section 12.

Further preferably, the ultrasonic osteotome head of the preferred embodiment of the present invention further comprises a mounting section 4 and a clamping and positioning section 5. Preferably, the mounting section 4 and the clamping and positioning section 5 are located at one end of the cutter head long shaft section 1 far away from the cutter head cutting section 2. Preferably, the clamping and positioning section 5 is located between the tool bit long shaft section 1 and the mounting section 4. As a preferred embodiment, the mounting section 4 is provided with an external thread for mounting. As a further preferred embodiment, the clamping and positioning section 5 is provided in the shape of a hexagonal prism. During installation, an operator can clamp the ultrasonic osteotome head on the clamping and positioning section 5 through a wrench.

As a further preferred embodiment of the present invention, the included angle between the cutting section 2 of the cutter head and the long axis section 1 of the cutter head is 120 ° to 130 °. Referring to fig. 8, in a preferred embodiment, the angle between the cutting segment 2 of the cutter head and the long segment 1 of the cutter head is 125 °.

Referring to fig. 6, 7, 9 and 10, as a further preferred embodiment of the present invention, the cutter head cutting section 2 is provided with a cutter tooth 3 away from the cutter head long axis section 1, the cutter tooth 3 includes a front surface and a back surface, and the front surface of the cutter tooth 3 is located on the ventral side or the dorsal side of the included angle between the cutter head cutting section 2 and the cutter head long axis section 1. The forward cutting or the reverse cutting can be carried out according to specific situations during the use process.

Referring to fig. 9, the ultrasonic osteotome head with the front surface of the cutter tooth 3 positioned on the ventral side of the included angle between the cutter head cutting section 2 and the cutter head long axis section 1 is suitable for cutting the ossification block from the bottom to the top. Referring to fig. 10, the ultrasonic osteotome head with the teeth 3 facing the back side of the angle between the cutting section 2 and the long axis section 1 of the head is adapted to cut the ossification block from the top downwards.

Referring to fig. 6 and 7, as a further preferred embodiment of the present invention, the width of the bit cutting section 2 is gradually increased from the end close to the bit major axis section 1 to the end far from the bit major axis section 1. The width of the tool bit cutting section 2 is increased, the single rake hooking range of the tool bit cutting section 2 is increased, and more effective cutting of the ossification block is facilitated.

Referring to fig. 6 and 7, as a further preferred embodiment of the present invention, one end of the tool bit cutting section 2, which is far away from the tool bit long shaft section 1, is provided as an arc-shaped end surface. The moving positions of the long shaft section 1 and the cutting section 2 of the cutter head are arc-shaped, so that sharp edges and corners can be effectively prevented from being formed locally, and the cutter head can be conveniently and safely moved in and out of an operation area to avoid tissue damage.

Referring to fig. 8, as a further preferred embodiment of the present invention, the thickness of the bit cutting section 2 is gradually reduced from the end close to the bit long axis section 1 to the end far from the bit long axis section 1.

Referring to fig. 6 to 8, as a further preferred embodiment of the present invention, the tool bit long axis section 1 is cylindrical, and one end of the tool bit cutting section 2 close to the tool bit long axis section 1 is a circular end face adapted to the tool bit long axis section 1, so that the tool bit cutting section 2 is smoothly connected to the surface of the tool bit long axis section 1. Cylindrical cutter head long shaft section 1 can avoid forming sharp-pointed edges and corners for cutter head long shaft section 1 is blunt nature, reduces supersound osteotome tool bit cutting segment and causes the damage to patient's peripheral tissue, improves the operation security.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides an supersound osteotome tool bit that spinal surgery used, its characterized in that, includes tool bit major axis section (1) and tool bit cutting segment (2), tool bit cutting segment (2) are the platykurtic, tool bit cutting segment (2) with tool bit major axis section (1) is connected, just tool bit cutting segment (2) with be provided with the contained angle between tool bit major axis section (1), so that tool bit cutting segment (2) with tool bit major axis section (1) forms the harrow form.

2. The ultrasonic osteotome head of claim 1, wherein said cutting head cutting section (2) width direction is perpendicular to said head long axis section (1) length direction.

3. The ultrasonic osteotome head of claim 2, wherein said head cutting segment (2) is angled with respect to said head longitudinal axis segment (1) by an angle of 120 ° to 130 °.

4. The ultrasonic osteotome head of claim 3, wherein said head cutting segment (2) is angled at an angle of 125 ° to said head shaft segment (1).

5. The ultrasonic osteotome head of claim 1, wherein said head cutting segment (2) is arcuate in shape at the junction with said head shaft segment (1).

6. The ultrasonic osteotome head of any one of claims 1-5, wherein said cutting head cutting segment (2) is provided with an incisor tooth (3) distal from said axial length of the head (1), said incisor tooth (3) comprising a front side and a back side, said front side of said incisor tooth (3) being located ventrally or dorsally of an angle between said cutting head cutting segment (2) and said axial length of the head (1).

7. The ultrasonic osteotome head of claim 6, wherein said cutting head cutting section (2) has a width gradually increasing from an end proximal to said axial section (1) to an end distal from said axial section (1).

8. The ultrasonic osteotome head of claim 7, wherein an end of said head cutting segment (2) distal from said head shaft segment (1) is configured as an arcuate end surface.

9. The ultrasonic osteotome head according to any one of claims 1-5, wherein said cutting head cutting section (2) has a thickness gradually decreasing from an end proximal to said axial section (1) to an end distal to said axial section (1).

10. The ultrasonic osteotome head of claim 9, wherein said head shaft section is cylindrical and said head cutting section (2) has a rounded end surface adapted to said head shaft section (1) at an end thereof adjacent to said head shaft section (1) for smooth surface connection of said head cutting section (2) to said head shaft section (1).

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