Intervertebral pore reamer

Abstract

The utility model discloses an intervertebral pore reamer which comprises a handle and a reamer rod, the handle and the reamer rod are fixedly connected, a through hole is formed in the reamer rod, a reamer head is arranged at the end, away from the handle, of the reamer rod, the reamer head comprises a set of symmetrical arc-shaped faces and a set of planes, and the arc-shaped faces and the planes are arranged on the reamer head. The reamer head is provided with a plane, an arc-shaped groove is formed in the plane, a first cutting edge is formed in the arc-shaped groove and the arc-shaped face, a shoveling portion is arranged at the end, away from the handle, of the reamer head, and a second cutting edge is arranged at the bottom end of the shoveling portion. Through the arrangement of the two sets of first cutting edges, tissues around the reamer can be removed by rotating the reamer, meanwhile, through the arrangement of a shoveling part and a second cutting edge, the tissues at the bottom of the reamer head can be shoveled and cleaned in a shoveling mode, and through the arrangement of a third cutting edge, the first cutting edge and the second cutting edge are arranged; furthermore, the components between the first cutting edge and the second cutting edge are convenient to clean, the cleaning efficiency is improved, and the cleanable range is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an intervertebral foramen reamer. Background Art

[0002] In some spinal endoscopic surgeries, it is necessary to remove some bone to establish a relatively spacious and free working channel for the operation. In the common lumbar transforaminal approach to remove the nucleus pulposus of the herniated disc, it is necessary to perform foraminal expansion and plasty, which is simply to remove or grind away part of the superior articular process through step-by-step ring saws, bone files or endoscopic drills, so as to remove its obstruction or the obstruction to the change of the angle of the endoscope, and then complete more complex surgical operations.

[0003] Generally, during the operation, the grinding of part of the superior articular process is done by step-by-step ring sawing. For the wound that has been ring sawed for the first time, when the secondary ring saw is used, the grinding efficiency of the secondary ring saw will be relatively lower than the efficiency of the overall cutting of the wound, which will prolong the operation time and the operation time of the medical staff. Some reamers in the prior art can grind or remove by rotating the edge of the reamer, but such reamers can only remove tissue in the circumferential direction of the reamer, and sometimes it is necessary to remove tissue at the bottom end of the reamer head, and the reamers in the prior art are not suitable for such needs. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the utility model is that some reamers in the prior art can perform grinding or cutting work by rotating the cutting edge of the reamer edge, but such reamers can only remove tissue in the circumferential direction of the reamer, and sometimes it is necessary to remove tissue at the bottom end of the reamer head, and the reamers in the prior art are not suitable for such needs.

[0006] (II) Technical solution

[0007] In order to solve the above problems, the utility model provides the following technical solutions:

[0008] A reamer for intervertebral space comprises a handle and a shank, wherein the handle and the shank are connected by an inherent connection, a through hole is provided on the shank, a reamer head is provided on the end of the shank away from the handle, the reamer head comprises a group of symmetrical arcuate surfaces and a group of planes, and an arcuate groove is provided on the plane, a first cutting edge is formed at the arcuate groove and the arcuate surface, a scraping portion is provided on the end of the reamer head away from the handle, and a second cutting edge is provided at the bottom end of the scraping portion.

[0009] Furthermore, the arc-shaped grooves are provided in two groups, which are respectively arranged on the two planes, and the first cutting edges are provided in four groups.

[0010] Furthermore, the second cutting edge is in an arc-shaped structure, which facilitates the removal of excess tissue.

[0011] Furthermore, the cutting angles of the first cutting edge and the second cutting edge are 3-15 degrees.

[0012] Furthermore, the handle and the knife rod are connected by either a fixed connection or a threaded connection.

[0013] Furthermore, the reamer head is provided with an inner groove, and the inner groove is connected to the through hole.

[0014] Furthermore, the inner recessed grooves are provided with two, which are respectively arranged on the two planes.

[0015] Furthermore, the scraping portion is provided with a third cutting edge, the third cutting edge is arranged obliquely and two ends of the third cutting edge are respectively connected to the first cutting edge and the second cutting edge.

[0016] (III) Beneficial effects

[0017] The beneficial effects of the utility model are:

[0018] 1: The two sets of first cutting edges can be used to remove the surrounding tissue by rotating the reamer. At the same time, the scraping portion and the second cutting edge can be used to scrape and clean the tissue at the bottom of the reamer head. The third cutting edge is provided to further facilitate the removal of components between the first cutting edge and the second cutting edge, thereby improving the cleaning efficiency and expanding the cleaning range. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the utility model;

[0020] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0021] Figure 3 It is a structural schematic diagram of a reamer head of the utility model.

[0022] Markings in the figure: 1-handle, 2-tool bar, 3-reamer head, 4-arc surface, 5-plane, 6-arc groove, 7-first cutting edge, 8-shoveling part, 9-second cutting edge, 10-inner groove, 11-through hole, 12-third cutting edge. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] See also Figure 1-3 The intervertebral foramen reamer shown comprises a handle 1 and a shank 2. The handle 1 is provided with a through hole 11 for easy access of a viewing device. The handle 1 and the shank 2 are fixedly connected or connected by a threaded connection. A reamer head 3 is provided on the end of the shank 2 away from the handle 1. The reamer head 3 is a four-sided structure, with two symmetrical arcuate surfaces 4 and two symmetrical planes 5. Two arcuate grooves 6 are provided on the two symmetrical arcuate surfaces 4, and a first cutting edge 7 is formed between the arcuate grooves 6 and the arcuate surfaces 4. Two first cutting edges 7 are formed between the two arcuate grooves 6 on each plane 5 and the two arcuate surfaces 4. Similarly, two first cutting edges 7 are formed on the other side. Thus, there are four first cutting edges in total. The first cutting edges 7 can cut off unnecessary tissues when the reamer is rotated.

[0026] In order to facilitate the removal of tissue at the bottom of the reamer head 3 by scraping up and down, a scraping portion 8 is provided on the reamer head 3 and a second cutting edge 9 similar to an arc is provided on the scraping portion 8, so as to facilitate the removal of tissue at the bottom of the reamer head 3 by scraping up and down. At the same time, a third cutting edge 12 is provided between each second cutting edge 9 and the first cutting edge 7, and the two ends of the third cutting edge 12 are respectively connected to the first cutting edge 7 and the second cutting edge 9, forming a large U-shaped cutting edge, and the third cutting edge 12 can further improve the removal efficiency.

[0027] At the same time, the cutting angles of the first cutting edge 7 and the second cutting edge 9 are controlled between 3 and 15 degrees. In order to facilitate the position of the sight glass entering the reamer head 3, an inner recess 10 is provided on the reamer head 3.

[0028] Working principle: After the preliminary treatment, a hole is opened on the human body. When the tissue inside the hole needs to be further cleaned, the reamer is implanted into the opened hole, and the reamer head 3 is placed at a suitable position in the hole. Then, the tissue around the first cutting edge 1 and the third cutting edge 12 can be cleaned by rotating left and right. At the same time, when the tissue below the reamer head 3 needs to be cleaned, the reamer is quickly pushed and pulled up and down, and the second cutting edge 9 on the scraping part 8 is used to scrape the tissue. The human tissue is cleaned as a whole through the first cutting edge 7, the second cutting edge 9 and the third cutting edge 12, which improves the cleaning efficiency and shortens the operation time.

[0029] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0030] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An intervertebral foraminal reamer, comprising a handle (1) and a shank (2), characterized in that: The handle (1) and the knife rod (2) are connected by an inherent connection. A through hole (11) is provided on the knife rod (2). A reamer head (3) is provided on the end of the knife rod (2) away from the handle (1). The reamer head (3) comprises a group of symmetrical arc surfaces (4) and a group of planes (5). An arc groove (6) is provided on the plane (5). A first cutting edge (7) is formed at the arc groove (6) and the arc surface (4). A scraping portion (8) is provided on the end of the reamer head (3) away from the handle (1). A second cutting edge (9) is provided at the bottom end of the scraping portion (8).

2. The intervertebral foramen reamer according to claim 1, characterized in that: The arc-shaped grooves (6) are provided in two groups, which are respectively arranged on the two planes (5), and the first cutting edges (7) are provided in four groups.

3. The intervertebral foramen reamer according to claim 1, characterized in that: The second cutting edge (9) is in an arc-shaped structure, which facilitates the removal of excess tissue.

4. The intervertebral foramen reamer according to claim 1, characterized in that: The cutting angles of the first cutting edge (7) and the second cutting edge (9) are 3-15 degrees.

5. The intervertebral foramen reamer according to claim 1, characterized in that: The handle (1) and the knife rod (2) are connected by either a fixed connection or a threaded connection.

6. The intervertebral foramen reamer according to claim 1, characterized in that: The reamer head (3) is also provided with an inner recessed groove (10), and the inner recessed groove (10) is connected to the through hole (11).

7. The intervertebral foramen reamer according to claim 6, characterized in that: The inner recessed groove (10) is provided with two grooves which are respectively arranged on the two planes (5).

8. The intervertebral foramen reamer according to claim 1, characterized in that: The scraping portion (8) is also provided with a third cutting edge (12), the third cutting edge (12) is arranged obliquely and the two ends of the third cutting edge (12) are respectively connected to the first cutting edge (7) and the second cutting edge (9).

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