Trephine protection sleeve

Abstract

The trephine protection sleeve comprises a sleeve body with two open ends, measuring scales are arranged on one side of the outer wall of the sleeve body in the length direction of the sleeve body, the outer wall of the sleeve body is connected with a sliding sleeve in a sliding and rotating mode, and a guide piece is arranged on one side of the front end of the outer wall of the sleeve body. The front end of the guide piece inclines downwards and is provided with an arc-shaped blocking piece forwards, a rotating grip is arranged at the rear end of the outer wall of the sleeve body, and the direction of the operating rod and the direction of the arc-shaped blocking piece are located on the same side and the same axis position. According to the trephine, the operation difficulty of bone grinding in the spine endoscope can be reduced, the bone removing efficiency is improved, the use safety of the trephine is improved, and the nerve injury risk is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a ring saw protective sleeve. Background Art

[0002] During endoscopic spinal surgery, it is impossible to observe whether the medial cortical bone is completely severed when grinding the bone with an endoscopic ring saw. If the medial cortical bone is broken and has not been discovered, continued grinding may easily cause nerve root damage, greatly increasing the risk of surgery and even causing irreversible nerve damage. The risk of using a ring saw again after the yellow ligament is removed is greatly increased compared to when the yellow ligament is not removed. Excessive force from the ring saw during surgery will have catastrophic consequences. The grinding process requires a lot of experience accumulation to avoid the risk of injury. The limited growth time and long experience accumulation of doctors form a sharp contradiction.

[0003] There are three commonly used bone grinding techniques under spinal endoscopy: bone drill grinding, blind ring saw, and endoscopic ring saw. The blind ring saw is a bone grinding method performed with the assistance of fluoroscopy in the absence of visual field. Multiple fluoroscopy and a lot of experience are required to ensure safety during the operation. The endoscopic ring saw can perform bone grinding with visual field, but the endoscopic field of view will be lost when the bone fills the ring saw, and the depth of the ring saw will return to empirical treatment, which makes the operation more difficult and the bone removal efficiency is low. If the medial cortical bone is broken and continued grinding has not been discovered, it is easy to cause nerve root damage, which greatly increases the risk of surgery and even causes irreversible nerve damage. Utility Model Content

[0004] The utility model aims to provide a ring saw protective sleeve, which can reduce the difficulty of bone grinding operation in spinal endoscopy, accelerate the efficiency of bone removal, improve the safety of ring saw use, and reduce the risk of nerve damage.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] A ring saw protective sleeve comprises a sleeve body with openings at both ends, a guide piece the size of a quarter circle and matched with the sleeve body is arranged on one side of the front end of the outer wall of the sleeve body, the front end of the guide piece is in a contracted shape, the front end of the guide piece is inclined downward and forwardly provided with an arc-shaped baffle piece matched with the sleeve body and the lower end of which extends to the central axis of the sleeve body, a rotating handle is arranged at the rear end of the outer wall of the sleeve body, the rotating handle comprises a fixing ring and an operating rod arranged on the outer wall of the fixing ring, the direction of the operating rod is on the same side and the same axis position as the direction of the arc-shaped baffle piece.

[0007] By adopting the above technical solution, when in use, firstly, through body surface positioning, anesthesia, puncture, and soft tissue expansion, the cannula body is placed under endoscopy into the part of the patient's bone that needs to be polished, the cannula body is rotated using a rotating handle and the lower end of the arc-shaped baffle on the guide plate is hooked onto the rear end of the bone that needs to be polished to stabilize the channel, and then the ring saw is extended from the rear end of the cannula body to the part where the bone needs to be polished. When polishing to a certain depth, the front end of the ring saw will contact the inner wall of the arc-shaped baffle and limit the ring saw from continuing to polish downward, thereby achieving the effect of limiting the grinding depth of the saw body and avoiding nerve root damage.

[0008] The utility model is further configured as follows: the inner edge of the lower end of the arc-shaped baffle is upwardly provided with a plurality of tooth openings which are distributed at equal intervals around the circumference.

[0009] By adopting the above technical solution, the friction between the arc-shaped baffle and the patient's bone can be increased when stabilizing the channel, thereby further improving the fixation effect and preventing slippage.

[0010] The utility model is further configured as follows: a measuring scale is arranged on one side of the outer wall of the sleeve body along its length direction.

[0011] The utility model is further configured as follows: the outer wall of the sleeve body is slidably and rotatably connected with a sliding sleeve used in conjunction with the measuring scale.

[0012] By adopting the above technical solution, it is convenient for medical staff to know the length of the cannula body inserted into the patient's body.

[0013] The utility model is further configured as follows: a threaded hole is provided inwardly on one side of the outer wall of the sliding sleeve, and a fixing bolt extending into the interior of the sliding sleeve is threadedly connected to the threaded hole.

[0014] By adopting the above technical solution, the sliding sleeve can be quickly fixed on the sleeve body to prevent sliding during the operation.

[0015] In summary, the utility model has the following beneficial effects:

[0016] First, the utility model can reduce the difficulty of bone grinding in spinal endoscopy, accelerate the efficiency of bone removal, improve the safety of using the trephine saw, and reduce the risk of nerve damage;

[0017] Secondly, the arc-shaped baffle of the utility model can not only hook the bone to stabilize the channel, but also limit the grinding depth of the ring saw;

[0018] Thirdly, the rotating handle of the utility model can not only control the rotation of the sleeve body, but also know the position and direction of the arc-shaped baffle by observing the position and direction of the rotating handle;

[0019] Fourthly, the measuring scale and the sliding sleeve of the utility model can facilitate the operation of medical personnel and let them know the length of the cannula body inserted into the patient's body, which is convenient for the surgical operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is mainly used to show the position and connection relationship of each component;

[0022] Figure 3 Mainly used to show threaded holes.

[0023] In the figure: 1. sleeve body; 11. guide plate; 12. arc-shaped baffle; 13. toothed mouth; 14. rotating handle; 15. fixing ring; 16. operating lever; 17. measuring scale; 18. sliding sleeve; 19. threaded hole; 2. fixing bolt. DETAILED DESCRIPTION

[0024] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Example, see Figure 1-3A ring saw protective sleeve comprises a sleeve body 1 with openings at both ends, a guide piece 11 of a quarter circle size and matched with the sleeve body 1 is arranged on one side of the front end of the outer wall of the sleeve body 1, the front end of the guide piece 11 is contracted, the front end of the guide piece 11 is inclined downward and forwardly provided with an arc-shaped baffle piece 12 matched with the sleeve body 1 and the lower end of the arc-shaped baffle piece 12 extends to the central axis of the sleeve body 1, and the inner edge of the lower end of the arc-shaped baffle piece 12 is upwardly opened with a plurality of teeth 13 distributed at equal intervals around the circumference.

[0029] A rotating handle 14 is provided at the rear end of the outer wall of the sleeve body 1. The rotating handle 14 includes a fixing ring 15 and an operating rod 16 arranged on the outer wall of the fixing ring 15. The operating rod 16 is oriented on the same side and the same axial position as the arc-shaped baffle 12. A measuring scale 17 is provided on one side of the outer wall of the sleeve body 1 along its length direction. A sliding sleeve 18 used in conjunction with the measuring scale 17 is slidably and rotatably connected to the outer wall of the sleeve body 1. A threaded hole 19 is opened inwardly on one side of the outer wall of the sliding sleeve 18. A fixing bolt 2 extending into the interior of the sliding sleeve 18 is threadedly connected to the threaded hole 19.

[0030] Method of use: When using, firstly, through surface positioning, anesthesia, puncture, and soft tissue expansion, the sleeve body 1 is placed under endoscopy into the part of the patient's bone that needs to be polished, and the rotating handle 14 is used to rotate the sleeve body 1 and let the lower end of the arc-shaped baffle 12 on the guide plate 11 hook the rear end of the bone that needs to be polished. When the arc-shaped baffle 12 hooks the position of the patient's bone that needs to be polished, the tooth mouth 13 can increase the friction between the arc-shaped baffle 12 and the patient's bone, thereby improving the fixing effect. Then the medical staff slides the sleeve 18 to make the sleeve 18 located at an appropriate position on the outer wall of the sleeve body 1, and then rotates the fixing bolt 2 in the threaded hole 19 to fix the sleeve 18, and cooperates with the arc-shaped baffle 12 to stabilize the channel.

[0031] When the sleeve body 1 is rotated, since the operating rod 16 on the fixing ring 15 and the arc-shaped baffle 12 are on the same side and the same axial position, the operating rod 16 can indicate the position and direction of the arc-shaped baffle 12. Then, the ring saw is extended from the rear end of the sleeve body 1 to the position where the bone needs to be polished. When the polishing reaches a certain depth, the front end of the ring saw will contact the inner wall of the arc-shaped baffle 12 and limit the ring saw from continuing to polish downward, thereby limiting the polishing depth of the saw body and avoiding nerve root damage.

[0032] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A ring saw protective sleeve, comprising a sleeve body (1) with openings at both ends, characterized in that: A guide piece (11) having a size of a quarter circle and cooperating therewith is arranged on one side of the front end of the outer wall of the sleeve body (1), the front end of the guide piece (11) is in a contracted shape, the front end of the guide piece (11) is inclined downward and forwardly provided with an arc-shaped baffle piece (12) cooperating therewith and the lower end of which extends to the central axis of the sleeve body (1), and a rotating handle (14) is arranged at the rear end of the outer wall of the sleeve body (1), the rotating handle (14) comprising a fixing ring (15) and an operating rod (16) arranged on the outer wall of the fixing ring (15), the direction of the operating rod (16) being on the same side and the same axis position as the direction of the arc-shaped baffle piece (12).

2. A ring saw protective sleeve according to claim 1, characterized in that: The inner edge of the lower end of the arc-shaped baffle (12) is upwardly provided with a plurality of tooth openings (13) distributed at equal intervals around the circumference.

3. The ring saw protective sleeve according to claim 1, characterized in that: One side of the outer wall of the sleeve body (1) is provided with a measuring scale (17) along its length direction.

4. A ring saw protective sleeve according to claim 3, characterized in that: The outer wall of the sleeve body (1) is slidably and rotatably connected to a sliding sleeve (18) used in conjunction with the measuring scale (17).

5. A ring saw protective sleeve according to claim 4, characterized in that: A threaded hole (19) is provided inwardly on one side of the outer wall of the sliding sleeve (18), and a fixing bolt (2) extending into the interior of the sliding sleeve (18) is threadedly connected to the threaded hole (19).

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