CN213489106U - Perpendicular scraper is used in operation under mirror - Google Patents

Abstract

The utility model relates to a vertical scraper for under-mirror operation, which comprises a cutter head, a handle and a long straight cutter bar. The cutter head comprises a blade part connected with the cutter bar, a blade back part formed on the back of the blade part and a cutter head end formed at the tail end of the cutter head. The knife edge part is provided with a continuous tangent plane formed from the knife bar to the knife head end, and the end surface of the knife head end is square; a cutting edge line in the form of a straight line segment is formed between the continuous section of the cutting edge part and the end face of the cutter head end. When the vertical scraper is used for surgery, bony tissues can be quickly and safely cut off; the design of the cutter head can protect the nerve tissues of specific parts from being damaged, greatly improve the operation efficiency, reduce the operation risk and the operation cost and shorten the operation time.

Description

Perpendicular scraper is used in operation under mirror

Technical Field

The utility model relates to a perpendicular scraper is used in operation under mirror belongs to medical instrument technical field.

Background

The osteotome is an operation instrument used for cutting bone tissues in surgical operations, and most of the traditional osteotomes are manual tools and are applied to open operations. Meanwhile, the traditional osteotome head cannot be used under an endoscope, so that the under-endoscope spinal surgery excessively depends on high-speed abrasive drilling or ultrasonic osteotome, the time consumption in the surgery is long, and the surgery risk degree is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a perpendicular scraper is used in operation under mirror has solved one of the current bone cutting instrument can't carry out safety, excision osseous tissue fast, operation time is long, the operation risk is high, the operation expense is expensive problem at least.

The technical scheme of the utility model is a perpendicular scraper is used in operation under mirror, include: a cutter head, a handle and a long straight cutter bar. The cutter head comprises a blade part connected with the cutter bar, a blade back part formed on the back of the blade part and a cutter head end formed at the tail end of the cutter head. The knife edge part is provided with a continuous tangent plane formed from the knife bar to the knife head end, and the end surface of the knife head end is square; a cutting edge line in the form of a straight line segment is formed between the continuous section of the cutting edge part and the end face of the cutter head end.

Further, according to from the cutter arbor to tool bit end direction, the continuous tangent plane of cutting edge portion include first arcwall face, parallel surface and second arcwall face in proper order, wherein: the parallel surface is parallel to the length direction of the cutter bar; the bending rate of the second arc-shaped surface is greater than that of the first arc-shaped surface; the first arc-shaped surface and the second arc-shaped surface are both positioned on one side of the parallel surface, so that the blade part and the cutter head end are formed into a shovel shape.

Further, the knife back part is formed into a plane beveling shape along the direction from the knife rod to the knife head end.

Further, the blade thickness of the blade part at the connecting position of the second arc-shaped surface and the parallel surface is the minimum.

Further, the tool bit also includes a transition radius along the edges of the tool bit end and the back portion.

Further, the blade back portion has a smooth surface with a roughness in the range of 0.8 to 1.6.

Furthermore, the cutter head and the cutter bar are integrally formed to form the cutter body.

Further, the handle includes a plurality of anti-slip grooves. The handle and the cutter bar are integrated and can not be disassembled.

The utility model has the advantages that:

the vertical scraper of the utility model can rapidly and safely cut off bony tissues in endoscopic surgery; the design of tool bit can protect other tissues in specific position not damaged, has reduced the operation risk, has shortened operation time. The vertical scraper is used for cutting off the angled bone surface and can also be used for stripping soft tissues such as ligamentum flavum and the like from the bone surface. It can also be used for bone surface treatment after shaping and scraping the soft tissue or end plate on the side. The back of the knife is polished smooth, and can play a role in protecting tissues and nerves.

Drawings

Fig. 1 shows a front overall view of a tool according to the invention.

Fig. 2 shows a side view of the cutting tool according to the present invention.

Figure 3 shows a perspective view of a detail of the cutter head.

Fig. 4 shows a perspective view of another direction of detail of the cutting head.

Figure 5 shows a side view of a detail of the cutter head.

Fig. 6 is a schematic view showing an initial operation state of the cutter according to the present invention in the spinal surgery.

Fig. 7 is a schematic view showing an intermediate working state of the cutter according to the present invention in the spinal surgery.

Fig. 8 is a schematic view showing the end of the operation of the cutting tool according to the present invention in spinal surgery.

Detailed Description

The conception, specific structure and technical effects of the present invention will be described clearly and completely with reference to the accompanying drawings and embodiments, so as to fully understand the objects, aspects and effects of the present invention. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It is noted that, as used in the specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element of the same type from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of the present disclosure.

Referring to fig. 1 and 2, a vertical scraper according to the present invention includes a blade head 1, a cylindrical handle 3, and a long straight blade bar 2. The outer diameter of the knife bar 2 and the knife head 1 is matched with the instrument channel of the endoscope. Therefore, the application range of the vertical scraper of the utility model does not limit the vertebra segment, and the vertical scraper can be used for the vertebra segment of cervical vertebra, thoracic vertebra and lumbar vertebra, and even can be used for other occasions of orthopedic minimally invasive surgery.

The handle is connected with the cutter bar 2, and the cutter head 1 is positioned at the end part of the cutter bar 2 and is integrally formed with the cutter bar 2. The handle 3 and the cutter bar 2 are integrated and are not detachable, so that the rigidity and the service life of the cutter are increased. In addition, the handle 3 includes a plurality of grooves 31 to provide anti-slip function and facilitate stable holding during the operation. Preferably, these grooves 31 are elongated along the length (y) of the handle 3 and are uniformly distributed along the cylindrical periphery of the handle 3 for easy manufacturing.

Referring to fig. 3 to 5, the cutter head 1 includes a blade portion 10 connected to the cutter bar 2, a blade back portion 11 formed at the back of the blade portion 10, and a cutter head end 12 formed at the tip of the cutter head 1. The blade portion 10 has a continuous cut surface formed in the direction from the holder 2 to the tip end 12, and the end surface of the tip end 12 has a square shape. The plane of the tool tip 12 may be perpendicular to the length direction of the tool holder 2 (y-direction as shown in fig. 3) or parallel to the radial direction of the tool holder 2 (x-direction as shown in fig. 3). A cutting edge line 13 in the form of a straight line segment is formed between the continuous cut surface of the cutting edge portion 10 and the end surface of the tip end 12.

Referring to fig. 4 and 5, the continuous section of the blade portion 10 includes a first arc-shaped surface 101, a parallel surface 103 and a second arc-shaped surface 102 in sequence, wherein: the parallel surface 103 is parallel to the longitudinal direction (y direction as shown in fig. 3) of the tool holder 2; the curvature of the second arc-shaped surface 102 is greater than that of the first arc-shaped surface 101; the first arc-shaped face 101 and the second arc-shaped face 102 are both located on one side of the parallel face 103, so that the blade portion 10 and the bit end 12 are formed in a scoop shape.

Referring to fig. 5, the tool back 11 is formed into a planar chamfer shape along the direction from the tool holder 2 to the tool bit end 12, that is, the tool back is designed to form an inclination angle with the axis of the tool holder 2, so that more space can be obtained when the endoscope is used under an endoscope. The knife back 11 is polished to be smooth and has no force angle, and can play a role in protecting tissues and nerves. The surface of the blade back portion 11 may be smooth to a roughness Ra of 1.6 or less, for example, and may be 0.8 or less. Preferably, the roughness is in the range of 0.8 to 1.6. Further, the blade thickness of the blade portion 10 at the connecting position of the second arc-shaped surface 102 and the parallel surface 103 is minimized, where the thickness is smaller than the blade thickness at the blade line 13. As shown in fig. 4 and 5, the cutting head 1 further comprises a transition fillet 14 along the edges of the cutting head end 12 and the cutting back end 11, which also protects tissues and nerves.

To further assist in understanding the structural features and advantages of the present invention, illustrations and procedures of the use of the vertical scraper according to the present invention are described below.

Reference is now made to fig. 6 to 8, which are schematic views of the initial, intermediate and end states of the operation performed in the operation of the cutter for engaging vertebrae according to the present invention. In the initial state, the cutter passes through the sleeve 4 of the surgical instrument to expose the cutter head 1, and then obliquely extends into the initial position near the surgical target point with the curved surface of the blade portion 10 facing the target point. In the intermediate state, the blade line 13 is brought into contact with the diseased tissue to be shaved, and then the cutter is moved in the right direction as shown by the force applied, at which time the excised tissue fragments can be transferred to a suitable place under the push of the curved surface of the blade portion 10, thereby reducing the damage and contamination to other tissues. At the end, the cutter returns to the initial position to prepare for retracting the cutter.

The foregoing is merely a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, as long as the technical effects of the present invention are achieved by the same means, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present disclosure should be included within the scope of the present disclosure. All belong to the protection scope of the utility model. The technical solution and/or the embodiments of the invention may be subject to various modifications and variations within the scope of the invention.

Claims (9)

1. A vertical scraper for an under-mirror operation comprises a cutter head (1), a handle (3) and a long and straight cutter bar (2),

tool bit (1) including blade portion (10) be connected with cutter arbor (2), take shape at blade back (11) at blade portion (10) back and take shape at terminal tool bit end (12) of tool bit (1), wherein:

the blade part (10) is provided with a continuous tangent plane formed from the cutter bar (2) to the cutter head end (12), and the end surface of the cutter head end (12) is square;

a cutting edge line (13) in the form of a straight line segment is formed between the continuous section of the cutting edge part (10) and the end surface of the cutter head end (12).

2. The vertical scraper for use in an endoscopic surgery according to claim 1,

according to the direction from the cutter bar (2) to the cutter head end (12), the continuous tangent plane of the blade part (10) sequentially comprises a first arc-shaped surface (101), a parallel surface (103) and a second arc-shaped surface (102), wherein:

the parallel surface (103) is parallel to the length direction (y) of the cutter bar (2);

the curvature of the second arc-shaped surface (102) is greater than that of the first arc-shaped surface (101);

the first arc-shaped surface (101) and the second arc-shaped surface (102) are both located on one side of the parallel surface (103), so that the blade part (10) and the bit end (12) are formed into a shovel shape.

3. The vertical scraper for use in an endoscopic surgery according to claim 2,

the cutter back part (11) is formed into a plane beveling shape along the direction from the cutter rod (2) to the cutter head end (12).

4. The vertical scraper for use in an endoscopic surgery according to claim 3,

the blade thickness of the blade part (10) at the connecting position of the second arc-shaped surface (102) and the parallel surface (103) is the minimum.

5. The vertical scraper for under mirror surgery according to claim 1 or 2, characterized in that,

the cutter head (1) also comprises a transition fillet (14) along the edges of the cutter head end (12) and the cutter back part (11).

6. The vertical scraper for use in an endoscopic surgery according to claim 2,

the blade back (11) has a smooth surface with a roughness in the range of 0.8 to 1.6.

7. The vertical scraper for under-mirror operation of claim 1 is characterized in that the cutter head (1) and the cutter bar (2) are integrally formed to constitute a scraper body.

8. Vertical scraper for endoscopic surgery according to claim 1 characterized in that the handle (3) comprises a plurality of grooves (31) for preventing the slipping of the hand.

9. Vertical scraper for under-mirror operations according to claim 1, characterized in that the handle (3) and the blade bar (2) are one-piece non-detachable.

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