CN102813546A - Spine clearance fixer - Google Patents

Abstract

The invention discloses a spine clearance fixer, comprising a positioning ring groove arranged on a fixer body, a bullet type drill bit arranged on one side of the positioning ring groove, a stop plate arranged on the other opposite side, at least one spiral guide groove arranged on the drill bit, a pin joint structure arranged on the outer side surface of the stop plate and capable of being assembled with a knob to screw the fixer between two adjacent spines, and an upper spinous process and a lower spinous process to be fixed by utilizing the positioning ring groove to accommodate the spine clearance.

Description

interspinous space fixer

technical field

The invention relates to a spinous gap fixer, in particular to a fixer which can be implanted between two adjacent spines by minimally invasive surgery to fix the spinous gap.

Background technique

Spinal diseases are mostly caused by factors such as long-term incorrect posture, sports injuries, or aging. Many spinal lesions, such as spinal stenosis or intervertebral disc herniation, are often accompanied by severe sciatica, Symptoms such as claudication or neuropathy, especially when the back of a disc is damaged, the extension of the spine can cause the two vertebrae to separate from the disc and not move towards each other normally, with the result that the nerve roots become trapped and severe The pain sensation causes the patient to have difficulty in moving. Usually this kind of spondylosis cannot be cured by drugs. The proven and effective way is surgical treatment, implanting fixers between the faulty adjacent spines to limit the extension of the vertebrae to each other, and to avoid pain when the patient moves, etc. unfavorable features; while the traditional surgical method is to incise the fascia and supraspinous ligament from the midline of the patient's back, pull out the muscles next to the spine along the periosteum and cut off the tendons attached to the spine, and then implant the fixation Located between the spinous processes of the spine, this type of surgical operation is extremely invasive, the operation process is complicated, the operation time is long, the wound is large, and the recovery period is long. In particular, some vertebral ligaments, muscles and tendons of the patient during the operation Therefore, even if the muscles are sutured after surgery, the muscles and tendons cannot fully recover to their original performance, and the supraspinous ligament, vertebral spine and interspinous ligament that have been removed can easily cause postoperative spinal instability.

Contents of the invention

In order to improve the above problems, the present invention provides a novel interspinous space fixer, which is suitable for minimally invasive surgery. The fixer is implanted between the adjacent spines with side screwing to fix the spinous process. The gap can achieve the advantages of small wound and less tissue damage. At the same time, it can protect the nerve tissue near the human spine, increase the safety of surgery, and improve many shortcomings of traditional surgery in one fell swoop.

According to the present invention, the interspinous space fixer mainly includes: a positioning ring groove is set on the body of the fixer, a bullet-shaped drill bit is arranged on one side of the positioning ring groove, and a stop plate is provided on the opposite side , and at least one helical guide groove is provided on the drill bit, extending from the front edge of the drill bit to the positioning ring groove, and a pivot joint structure is provided on the outer surface of the stop plate, which can be combined with an installation tool to The fixer is screwed into the space between two adjacent spines, and the positioning ring groove is used to accommodate between the upper spinous process and the lower spinous process to be fixed, so as to achieve the purpose of stabilizing the interspinous space.

According to the present invention, the groove specifications of the spiral guide groove are set from large to small, which can prevent the spiral guide groove from being easily withdrawn from the fixed position due to the influence of external force after being screwed into the fixed position between two adjacent spines.

According to the present invention, the interspinous space fixer is made of composite material or alloy material in an integral molding manner, wherein the composite material is selected from carbon fiber, polyether ether ketone (PEEK, poly ether etherkefone), etc., and The alloy material is selected from titanium alloy, tantalum alloy, stainless steel, etc., but the scope of implementation is not limited to the aforementioned materials. All kinds of biocompatible materials with good mechanical strength and chemical resistance suitable for implantation in the human body can be used. Be applicable.

According to the present invention, the positioning ring groove has different sizes to adapt to affected parts in different positions, and its cross-section can be in any shape, such as circular, elliptical or polygonal.

Also according to the present invention, the pivot structure includes a screw hole and at least one positioning socket. It can also be understood that the aforementioned pivot structure can also be set as a hole-shaped or groove-shaped pivot structure that can cooperate with different types of installation tools. In order to meet the actual needs of the operation, the fixer can be combined with a suitable installation tool, and the fixer can be conveniently rotated into the space between two adjacent spinous spines and installed to a desired fixed position.

The spinous space fixer of the present invention can be implanted into the spinous process space of the faulty part from the side of the spine using minimally invasive surgery. The operation is simple and fast, and the small wound can be recovered quickly, and the implantation process does not need to cut off ligaments, tendons or destroy the patient. The anatomical structure between the spinous processes can reduce the injury to the patient, and ensure that the spinal structure can fully restore the original activity efficiency after the operation; in addition, the fixer of the present invention has a round bullet-shaped drill bit 1. When the interspinous space is adjacent, it can avoid sharp parts causing scraping damage to surrounding tissues, thereby greatly reducing the risk of nerve tissue damage; in addition, the fixer is made of polyetheretherketone (PEEK) material, which is a biocompatible material The properties are very close to the strength of the human spine, which can reduce the sinking effect and the wear and tear on the spine.

The other functions and technical features of the present invention will be further clarified in the following, and the present invention can be realized according to those who are familiar with the technology and read the description in the text.

Description of drawings

Fig. 1 is the perspective view of the embodiment of the present invention;

Figure 2 is a partially cutaway side view of an embodiment of the present invention;

Fig. 3 is a perspective view of another angle of the embodiment of the present invention;

Fig. 4 is the schematic diagram of the combination of the fixer and the handle of the present invention;

Figure 5 is a schematic plan view of the fixture of the present invention being installed in adjacent interspinous spaces; and

Fig. 6 is a schematic side view of the fixator of the present invention being installed in adjacent interspinous spaces.

Detailed ways

As shown in Figures 1 to 3 in the embodiment of the present invention, the body of the interspinous space fixer is slightly bullet-shaped, and it is made of polyetheretherketone material, which has good mechanical strength and chemical resistance. Therefore, it is very suitable for implanting in the human body; the front part of the fixer body has a bullet-shaped drill bit 1 with a round and smooth shape, and a positioning ring groove 2 is provided in the middle part, and a spiral guide groove 3 extends from the front edge of the drill bit 1 to the positioning ring groove 2, and the spiral guide groove 3 has groove specifications from large to small; in addition, a stopper plate 4 is provided at the end of the fixture body, and on the outer end surface of the stopper plate A screw hole 41 and a pair of positioning insertion holes 42 are provided on the top.

As the interspinous space fixer with the aforementioned structural features, when installed using minimally invasive surgery (or called endoscopic surgery), a sleeve with a small diameter (generally about 2 cm) passes through the muscle and reaches the spinal failure site from the side. Near the interspinous space, a miniature camera is inserted in the sleeve, and then the visual field is transmitted and projected on the monitor screen, and the operation site is accurately positioned (the above is not shown in the drawing), and then, with a rotary handle 5. The movable bolt 51 and the positioning catch 52 at the front end (as shown in Figure 4) are pivotally connected to the screw hole 41 and the positioning socket 42 on the rear end surface of the spinous space fixer, and the spinous space is pivotally connected by the handle 5 The fixer reaches the vertebral fault site through the aforementioned sleeve, and then the knob 6 is used to rotate and advance and the helical guide groove 3 on the fixer is guided, so that the bullet-shaped drill bit 1 of the interspinous space fixer can be placed on the uncut spine. In the case of ligament 61, the rotary drill passes through the physiological tissue in the space between two adjacent spinous processes, and makes the positioning ring groove 2 of the spinous space fixer just stay between the upper spinous process 62 and the lower spinous process 63 (as shown in Figure 5 and As shown in Figure 6); and by implanting the fixator of the present invention in the adjacent interspinous space of the vertebral fault position, the purpose of stabilizing the interspinous space can be achieved, so as to avoid various problems caused by abnormal compression and constriction of the adjacent interspinous space an unfavorable feature.

In summary, it can be seen that the spinous space fixer of the present invention can be implanted into the spinous process space of the faulty part from the side of the spine using minimally invasive surgery. , tendons, or destroy the anatomical structure between the patient's spinous processes, which can reduce the injury to the patient, and ensure that the spinal structure can fully restore the original activity efficiency after the operation; in addition, the fixer of the present invention has a round bullet-shaped drill bit 1 , when the rotary drill passes through the adjacent interspinous space, it can avoid sharp parts causing scraping damage to the surrounding tissue, thereby greatly reducing the risk of damage to nerve tissue; in addition, the fixator is made of polyetheretherketone (PEEK) material , the properties of this biocompatible material are very close to the strength of the human spine, which can reduce the subsidence and wear damage to the spine.

The above-mentioned embodiments are only used for convenience to illustrate the present invention and are not intended to be limiting. Without departing from the spirit of the present invention, the various simple deformations and modifications made by those skilled in the art according to the scope of the patent application for the present invention and the description of the invention are still the same. should be included in the scope of the claims.

Claims (6)

1. A spinous gap fixer, characterized in that a positioning ring groove is set on the fixer body, a bullet-shaped drill bit is provided on one side of the positioning ring groove, and a stopper is provided on the opposite side. The baffle plate is provided with at least one helical guide groove on the drill bit, which extends from the front end edge of the drill bit to the positioning ring groove, and a pivot joint structure is provided on the outer surface of the stop baffle plate, which can be combined with a rotary handle The fixer is screwed into the space between two adjacent spinous spines, and the positioning ring groove is used to accommodate between the upper spinous process and the lower spinous process to be fixed, so as to stabilize the interspinous space. 2. The interspinous space fixer according to claim 1, characterized in that, the groove specifications of the spiral guide groove are set from large to small. 3 . The interspinous space fixer as claimed in claim 1 , wherein the pivot structure comprises a screw hole and at least one positioning insertion hole. 4 . 4. The interspinous space fixer according to claim 1, characterized in that the interspinous space fixer is made of one of composite material or alloy material in an integral molding manner. 5. The interspinous space fixer according to claim 4, wherein the composite material is selected from one of polyetheretherketone and carbon fiber. 6. The interspinous space fixer as claimed in claim 4, wherein the metal material is selected from one of titanium alloy, tantalum alloy and stainless steel.

Images