CN216823569U - Novel trepan for intervertebral foramen - Google Patents

Abstract

The utility model relates to a novel intervertebral foramen mirror trepan: including guide arm, trepan body, the guide arm sliding connection is in the trepan body, install the T shape handle that is used for driving the guide arm on the outer end of guide arm, be provided with most advanced screw nail on the inner of guide arm, the diameter of most advanced screw nail is less than the diameter of guide arm, the trepan body includes the cavity cylinder, is provided with the handle in the periphery of the one end of cavity cylinder, is provided with the sawtooth in the periphery of the other end, be provided with the internal thread in the interior week of the sawtooth end of cavity cylinder, internal thread length is greater than the length of most advanced screw nail, and internal thread diameter is greater than the diameter of most advanced screw nail, the utility model discloses it is simple and reasonable, can prevent trepan in-process offset, avoid haring spinal cord nerve and labour saving and time saving directly perceived, high-efficiently, be suitable for clinical popularization and application.

Description

Novel trepan for intervertebral foramen

Technical Field

The utility model relates to a novel intervertebral foramen mirror trepan.

Background

The intervertebral foramen mirror operation is widely applied to treating lumbar diseases clinically due to the advantages of visibility, minimal invasion, quick recovery and the like. With the development of minimally invasive spine surgery, the existing intervertebral foramen endoscopic technology is not only limited to nucleus pulposus removal and decompression, but also the minimally invasive technologies such as intervertebral foramen endoscopic fusion and the like are gradually mature, and the trephine plays a significant role in the intervertebral foramen operation. The trephine currently used in the transforaminal endoscopic instrument has several disadvantages: 1. the trephines with different diameters share the same handle, the tail of the trephine is provided with rubber or metal, the rubber or metal is used for enhancing the fixation of the handle, the trephine is easy to age, the handle is required to be applied when the trephine is used every time, and the operation link and time are increased; 2. if the ring saw is disinfected by rubber components, the ring saw can not be disinfected at high pressure, high temperature and high pressure, so that the workload and the economic consumption are increased; 3. the existing trephine is unthreaded, when the trephine is used for operation, the trephine has no self-tapping and depth limiting functions, a powerful drill is needed to be used for drilling the trephine when a bone is drilled, particularly, a person with hard bone needs to use larger power, the spinal nerves are extremely easily damaged by too much force, pain stimulation of a patient is aggravated, the trephine does not have an inner screw, the drilled bone is extremely easy to stay in the original position and needs to be grabbed under the trephine for multiple times, operation time in an operation is prolonged, and the trephine does not have scales and a fixing device and needs to be subjected to multiple times of perspective; 4. after the intervertebral foramen is firstly formed by trephine, under the condition that the intervertebral foramen is not formed perfectly due to various reasons, the intervertebral foramen needs to be formed safely under an intervertebral foramen scope for the second time. The diameter of the existing under-mirror trephine is smaller than that of an under-intervertebral-hole-scope channel (< 3.5 MM) and the trephine is difficult to control due to too long force, the removal of the shielding bone by secondary under-mirror forming is limited and the time is long, even if under-mirror grinding drill is adopted, the cost is high due to under-mirror grinding drill, and the under-mirror grinding drill is easy to age and wear due to fineness. The conventional trephine is not guided by a guide rod, and after the intervertebral foramen is removed, the conventional trephine is directly used for secondary forming through an intervertebral foramen working channel, so that the position of the trephine cannot be determined, spinal nerves are easily damaged, and unnecessary bone is easily removed.

Disclosure of Invention

In view of the problem that above-mentioned prior art exists, the utility model provides a novel transforaminal endoscope trepan solves among the current transforaminal endoscope apparatus instrument structure and operation in loaded down with trivial details, dangerous, expensive, easy consume, space size not enough, causes the secondary injury to the patient, alleviates painful amazing in the patient art, and intervertebral foramen takes shape under the mirror of needs many times, and the unable security of confirming the trepan under looking directly influences the problem of operation.

The technical scheme adopted by the invention for solving the technical problem is that the novel transforaminal trephine comprises the following components: the circular saw comprises a guide rod and a circular saw body, wherein the guide rod is connected in the circular saw body in a sliding mode, and a T-shaped handle used for driving the guide rod is installed on the outer end of the guide rod.

Furthermore, a sharp-end threaded nail is arranged at the inner end of the guide rod, and the diameter of the sharp-end threaded nail is smaller than that of the guide rod.

Furthermore, the trepan body comprises a hollow cylinder, a handle is arranged on the periphery of one end of the hollow cylinder, and sawteeth are arranged on the periphery of the other end of the hollow cylinder.

Furthermore, internal threads are arranged on the inner periphery of the sawtooth end of the hollow cylinder, the length of the internal threads is larger than that of the pointed-end threaded nail, and the diameter of the internal threads is larger than that of the pointed-end threaded nail.

Furthermore, a polygonal column parallel to the guide rod is arranged in the middle of the outer end of the guide rod, and a clamping groove matched with the polygonal column is formed in the end portion of the T-shaped handle.

Further, the T-shaped handle is hollow and waist-shaped.

Furthermore, scales are arranged on the periphery of the hollow cylinder along the length direction from the sawtooth end.

Compared with the prior art, the utility model discloses following beneficial effect has: the trepan can be used after being disinfected repeatedly, is not easy to wear, can ensure the safety of the trepan under the direct vision of a mirror, and effectively prevents the trepan from rotating or sliding when drilling the bone.

Drawings

The following is a further description of the present invention with reference to the accompanying drawings.

FIG. 1 is a schematic view of a guide bar structure;

FIG. 2 is a schematic structural view of a trepan body;

FIG. 3 is a side view of the trepan body.

In the figure: 1-a T-shaped handle; 2-a card slot; 3-polygonal columns; 4-a guide rod; 5-pointed screw nail; 6-hollow cylinder; 7-internal threads; 8-saw teeth; 9-handle.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1-3, a novel transforaminal trephine: the trepan comprises a guide rod 4 and a trepan body, wherein the guide rod is connected in the trepan body in a sliding mode, a T-shaped handle 1 used for driving the guide rod is installed on the outer end of the guide rod, and the guide rod, the trepan body and the T-shaped handle are made of metal materials.

In the embodiment, a sharp-end screw nail 5 is arranged on the inner end of the guide rod, and the diameter of the sharp-end screw nail is smaller than that of the guide rod; studies have shown that the average isthmus depth of the articular process on the lumbar facet joint is 0.92 + -0.12 cm and 0.84 + -0.11 cm for men and women, so the tip screw length is set to 5-8 MM and the diameter of the tip screw can be: 2MM, because of the 3.5MM of diameter of the intra-foraminous endoscope lens working inner tube, the guide rod needs to pass through the intra-foraminous endoscope inner tube, the rigidity of the guide rod cannot be ensured due to too thin diameter, the diameter of the guide rod cannot pass through the intra-foraminous endoscope working inner tube due to too thick diameter, the diameter of the guide rod can be set to be 3MM, and the depth of the tip of the guide rod can be conveniently limited.

In the embodiment, the trepan body comprises a hollow cylinder 6, a handle 9 is welded at a right angle on the periphery of one end of the hollow cylinder, and sawteeth 8 are arranged on the periphery of the other end of the hollow cylinder; the hollow cylinder is a hollow structure with the outer diameters of 6.5MM, 7.5MM, 9MM and 10MM, the pipe diameter thickness of 0.5-0.8 MM and the length of more than or equal to 20 CM.

In this embodiment, be provided with internal thread 7 on the internal periphery of the sawtooth end of cavity cylinder, internal thread length is about 1.5CM, internal thread length is greater than the length of sharp-end screw, and the diameter of internal thread is greater than the diameter of sharp-end screw, so contactless between sharp-end screw and the internal thread, when trepan body sawtooth 8 revolves the sclerotin end, can have the sense of falling to empty, the internal thread is self tapping cavity internal thread nail form, when using, can deviate from the sclerotin that saws through the internal thread, when the guide arm revolves the end simultaneously, because the guide arm diameter is greater than the diameter of sharp-end screw, the guide arm can support and lean on the sclerotin, realize guide arm tip limit for depth at last.

In this embodiment, the outer end middle part of guide arm is provided with the polygon post 3 parallel with the guide arm, and what adopt in this embodiment is the trilateral, and certainly other polygons also can, be provided with on the tip of T shape handle with polygon post matched with draw-in groove 2, the tip and the guide arm of T shape handle are connected and are passed through draw-in groove and polygon post plug-in cooperation, then through optional T shape handle and then drive rotatory polygon post, and then drive the guide arm rotation, cooperate integrative simple and easy loading and unloading.

In this embodiment, for reasonable design, the T-shaped handle is hollow and waist-shaped, and is suitable for being grasped by fingers of a human body.

In this embodiment, for reasonable design, be provided with the scale on the hollow cylinder periphery from the sawtooth end along length direction.

In the embodiment, when in use, the guide rod, the T-shaped handle and the trepan body are matched for use to realize visualization, simplification and safety. The guide rod is used as a guide pin, and when the intervertebral formation is not satisfactory under the intervertebral foramen mirror after the intervertebral foramen is formed for the first time by the intervertebral foramen mirror. The guide rod can be inserted into the visual intervertebral foramen mirror lens, the guide rod is inserted into the sclerotin through the self-tapping tip threads at one end of the guide rod, one end of the T-shaped handle is connected with the other end of the guide rod, and the guide rod is rotated to the inserted sclerotin at one end of the guide rod in the visual intervertebral foramen mirror environment and is not easy to move. Remove T shape handle and foraminiferous mirror camera lens, leave the guide arm in the working channel of foraminiferous mirror, then use the trepan body to get into intervertebral foramen along the guide arm and need form the department, the trepan body carries out concentric circles or eccentric trepan with the guide arm as required, through rotatory trepan body to trepan body one end internal thread limit depths, the trepan body meets the soft tissue after and rotates together with the guide arm, the main knife doctor can have obvious sense of falling to the sky, can stop immediately to bore the trepan body to the spinal cord, the nerve is close to, thereby avoid haring spinal cord nerve, can withdraw from the foraminiferous mirror working channel with the guide arm together. The sawn bone may be removed along with the trephine body. The intervertebral foramen mirror lens can be placed to continue to be visualized for the next operation treatment. If multiple forming is needed, the above operations are repeated.

Any technical solution disclosed in the present invention is, unless otherwise stated, disclosed a numerical range if it is disclosed, and the disclosed numerical range is a preferred numerical range, and any person skilled in the art should understand that: the preferred ranges are merely those values which are obvious or representative of the technical effect which can be achieved. Because numerical value is more, can't be exhaustive, so the utility model discloses just disclose some numerical values with the illustration the technical scheme of the utility model to, the numerical value that the aforesaid was enumerated should not constitute right the utility model discloses create the restriction of protection scope.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the terms "first" and "second" are used merely to distinguish one element from another in a descriptive sense and are not intended to have a special meaning unless otherwise stated.

The utility model discloses if disclose or related to mutual fixed connection's spare part or structure, then, except that other the note, fixed connection can understand: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, the orientation or positional relationship indicated in any of the above-mentioned technical solutions of the present disclosure for indicating positional relationship, such as "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of describing the present disclosure, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present disclosure, and the term used for indicating shape applied in any of the above-mentioned technical solutions of the present disclosure includes a shape similar, analogous or approximate thereto unless otherwise stated.

The utility model provides an arbitrary part both can be assembled by a plurality of solitary component parts and form, also can be the solitary part that the integrated into one piece technology was made.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.

Claims (3)

1. A novel trephine for intervertebral foramen mirror is characterized in that: the circular saw comprises a guide rod and a circular saw body, wherein the guide rod is connected in the circular saw body in a sliding manner, and a T-shaped handle for driving the guide rod is arranged on the outer end of the guide rod; a sharp-end threaded nail is arranged at the inner end of the guide rod, and the diameter of the sharp-end threaded nail is smaller than that of the guide rod; the trepan body comprises a hollow cylinder, a handle is arranged on the outer periphery of one end of the hollow cylinder, sawteeth are arranged on the outer periphery of the other end of the hollow cylinder, internal threads are arranged on the inner periphery of the sawteeth end of the hollow cylinder, the length of the internal threads is larger than that of the pointed threaded nail, and the diameter of the internal threads is larger than that of the pointed threaded nail; scales are arranged on the periphery of the hollow cylinder along the length direction from the sawtooth end.

2. The novel transforaminal trephine of claim 1, wherein: the middle part of the outer end of the guide rod is provided with a polygonal column parallel to the guide rod, and the end part of the T-shaped handle is provided with a clamping groove matched with the polygonal column.

3. The novel transforaminal trephine of claim 1, wherein: the T-shaped handle is hollow and waist-shaped.

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