CN209474687U - Lateral mass of atlas positions nerve dissector - Google Patents

Abstract

The utility model relates to a nerve stripper for positioning the lateral mass of the atlas. A positioning and peeling part including a hand-held part and connected to one end of the hand-held part is adopted; the positioning and peeling part is flat, and the front end is provided with a bayonet structure. Two curved sections, and a third curved section is arranged on the other side of the front end of the bayonet. The overall bending direction of the first bending section is opposite to the overall bending direction of the second bending section and the third bending section; the arc length of the first bending section is greater than the arc length of the second bending section and the arc length of the third bending section; the second bending section The front end and both sides of the bending section and the third bending section are blunt mouths; the technical solution of the front end spacing of the second bending section and the third bending section is 3-10mm. The utility model has the advantages that it is convenient for the operator to quickly and accurately locate the side block, prevents slippage between the stripper and the side block, and protects peripheral nerves and blood vessels. The utility model has the advantages of novel structure, safety and reliability, and convenient operation, which can improve the operation efficiency and reduce the operation risk.

Description

Atlas lateral mass localization nerve dissection

technical field

The utility model relates to the field of medical instruments, in particular to an atlas lateral mass positioning nerve stripper for spinal and cervical spine surgery.

Background technique

Nerve stripper is a commonly used medical device in spinal surgery. Existing traditional nerve dissectors generally include a hand-held portion and an operating portion that are connected. The front end of the operation part is mostly in the shape of a flat sheet, a hook, or a shovel. At present, in clinical practice, patients suffering from neck fractures, dislocations, and tumor diseases often require posterior cervical spinal canal expansion and internal fixation. During the process of placing screws on the cervical spine from the posterior approach, especially when placing screws on the atlas, the surgeon requires the surgeon to fully explore the relationship between the lateral mass and the surrounding tissue, and at the same time accurately place the screw from the specific position and angle of the lateral mass. When the lateral mass is placed, only when the screw is screwed in at the correct position and angle, can it be firmly fixed without damaging the nerves and blood vessels.

In the previous application scenarios of surgical tools, the surgeon often used the traditional nerve stripper to explore both sides of the lateral mass, and then pressed the nerve stripper to the lateral mass as a locator and protector, and then used the other hand to complete the nail placement . However, because the bony structure near the pin placement point of the lateral mass has a column-like structure with a smooth surface, and the front end of the traditional nerve dissection is also arc-shaped and also smooth, the contact between the two is only the top of the arc and the top of the arc. The point-to-point small-area joint is similar to human fingertip to fingertip, which makes it easy for relative slippage during surgical operation, which is extremely inconvenient to operate. It is easy to cause inaccurate positioning and damage to nerve tissue after slippage. The risk of postoperative complications is increased. At present, there is no nerve dissection specifically designed for the positioning of the lateral mass of the atlas, which can quickly and accurately locate the lateral mass, protect peripheral nerves and blood vessels, and prevent slippage between the dissection and the lateral mass.

Utility model content

The technical problem to be solved by the present utility model is to provide a nerve stripper for positioning the lateral mass of the atlas, which is convenient for positioning the lateral mass of the atlas, exploring the surrounding tissue, and using its positioning stripping with a curved segment during the operation of the atlas. The part, as a bayonet, wraps the structural part of the side block to achieve close fit with the side block to avoid inaccurate positioning and slippage. At the same time, the arc structure on both sides of the front end of the bayonet can avoid damage to nerves and blood vessels. The limit of each bayonet is determined according to human anatomy, with reference to the width of the middle of the lateral mass of the atlas and the transverse diameter of the upper and lower articular surfaces of the atlas. Patient fit. The utility model has the advantages of novel structure, safety and reliability, and convenient operation, which can improve the operation efficiency of medical staff and reduce the operation risk of patients.

The technical solution adopted by the utility model to solve the technical problem is as follows: an atlas lateral mass positioning nerve dissection device, comprising a hand-held part connected to a positioning and dissection part at one end of the hand-held part; The peeling part is flat, the front end is provided with a bayonet structure, the bayonet is provided with a first curved segment, one side of the front end of the bayonet is provided with a second curved segment, and the other side of the front end of the bayonet is provided with a third curved segment.

Preferably, the overall bending direction of the first bending section is opposite to the overall bending direction of the second bending section and the third bending section.

Preferably, the arc length of the first curved segment is greater than the arc length of the second curved segment and the arc length of the third curved segment.

Preferably, the front end and both sides of the second curved segment and the third curved segment are blunt openings.

Preferably, the distance between the front ends of the second bending section and the third bending section is 3 mm to 10 mm.

beneficial effect

The atlas lateral mass positioning nerve peeler of the utility model is convenient for locating the lateral mass and exploring surrounding tissues in cervical spine surgery, especially in atlas surgery, and the positioning and peeling part with a curved segment at one end is used as a bayonet to remove the lateral mass. The side block structure is partially wrapped to achieve a close fit with the side block to avoid inaccurate positioning and slippage. At the same time, the arc structure on both sides of the front end of the bayonet can avoid damage to nerves and blood vessels. The limit of each bayonet is determined according to human anatomy, with reference to the width of the middle of the lateral mass of the atlas and the transverse diameter of the upper and lower articular surfaces of the atlas. Patient fit. The utility model has the advantages of novel structure, safety and reliability, and convenient operation, which can improve the operation efficiency of medical staff and reduce the operation risk of patients.

Description of drawings

FIG. 1 is a schematic three-dimensional structural diagram of the atlas lateral mass positioning nerve dissector of the present invention.

FIG. 2 is a schematic diagram of the three-dimensional structure of the atlas lateral mass positioning nerve dissector of the present invention.

FIG. 3 is a partial enlarged schematic diagram of part of FIG. 1-A.

The figures are marked as: 1-hand-held part, 2-positioning and peeling part, 3-first bending section, 4-second bending section, 5-third bending section.

Detailed ways

The present utility model will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. At the same time, it should be understood that after reading the description of the present utility model, those skilled in the art can make various changes or modifications to the present utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

The implementation is as follows.

As shown in Fig. 1 , a nerve dissector for positioning the lateral mass of the atlas, comprising: a hand-held part (1), a positioning and dissection part (2) connected to one end of the hand-held part (1); characterized in that, the The positioning and peeling part (2) is flat, the front end is provided with a bayonet structure, the bayonet is provided with a first curved segment (3), one side of the front end of the bayonet is provided with a second curved segment (4), and the other side of the front end of the bayonet is provided A third curved segment (5) is provided. The overall bending direction of the first bending section (3) is opposite to the overall bending direction of the second bending section (4) and the third bending section (5). The arc length of the first bending section (3) is greater than the arc length of the second bending section (4) and the arc length of the third bending section (5). The front end and both sides of the second bending section (4) and the third bending section (5) are blunt openings. The distance between the front ends of the second bending section (4) and the third bending section (5) is 3 mm to 10 mm.

How to use: After exposing the lateral mass of the atlas, the operator holds the hand-held part (1) of the lateral atlas mass positioning nerve dissection with a pen method, and rotates the lateral atlas mass positioning nerve dissection to the positioning strip (1). 2) The flat surface is parallel to the horizontal plane of the human body, and at the same time, the dissection part (2) is positioned perpendicular to the coronal plane of the human body, and the dissection part (2) is positioned close to the lateral mass of the atlas, and the first curved segment on the bayonet structure of the dissection part (2) is used. (3) Try to stick to the lateral mass of the atlas, operate carefully, carefully explore the nerves and blood vessels, and at the same time use the second curved segment (4) and the third curved segment (5) with a small and blunt arc length, along both sides of the lateral mass Then, continue to make the long arc (3) of the first curved segment fully abut the columnar atlas lateral mass, At this time, due to the wrapping effect of the atlas lateral mass positioning nerve dissection, the operator can know the position of the lateral mass without interference to facilitate positioning, and because of its separation effect, the operator can avoid damage to the lateral mass when drilling holes and placing screws. surrounding nerves and blood vessels. Then, the operator should continue to hold the handle (1) of the lateral mass of the atlas with one hand, keep it still, and use the other hand as the positioning reference to complete the placement of the screw. The shape of the block is adapted to fit tightly, and the operator can apply gentle force to ensure that there is no slippage between the two.

Claims (5)

1. a kind of lateral mass of atlas positions nerve dissector, comprising: hand-held part (1) is connected to the positioning of the hand-held part (1) one end Stripping portion (2)；Its feature is being that the positioning stripping portion (2) is flat-shaped, one bayonet arrangement of front end setting, setting in bayonet Have the first bending section (3), the second bending section (4) are arranged in bayonet front end side, and third bending section is arranged in the bayonet front end other side (5)。

2. lateral mass of atlas according to claim 1 positions nerve dissector, it is characterised in that: first bending section (3) Integrally bending direction it is contrary with the integrally bending of the second bending section (4) and third bending section (5).

3. lateral mass of atlas according to claim 2 positions nerve dissector, it is characterised in that: first bending section (3) Arc length be greater than the second bending section (4) arc length and third bending section (5) arc length.

4. lateral mass of atlas according to claim 3 positions nerve dissector, it is characterised in that: second bending section (4), The front end and two sides of third bending section (5) are blunt mouth.

5. lateral mass of atlas according to claim 4 positions nerve dissector, it is characterised in that: second bending section (4), The front end spacing of third bending section (5) is 3mm to 10mm.