CN219579007U - Percutaneous pedicle screw implantation guide - Google Patents

Abstract

The utility model discloses a percutaneous pedicle screw imbedding guide device, which comprises a grab handle, a guide channel with an inward inclination angle and transverse process feet, wherein the guide channel is biased to one side of the grab handle and penetrates through the grab handle up and down, and the transverse process feet are positioned below the guide channel. Above-mentioned percutaneous pedicle of vertebral arch screw is put into director utilizes the transverse process fixed point, through the guide way that can supply opening, open circuit and ball to visit to put into from taking, accurate location is near the herringbone crest summit, has solved the easy smooth problem of opening when percutaneous pedicle of vertebral arch screw is put into, can cooperate bare-handed nail technique betterly, can put into pedicle of vertebral arch screw more accurately, reduces pedicle of vertebral arch screw put the nail degree of difficulty, improves the precision of putting the nail simultaneously, is worth clinical popularization.

Description

Percutaneous pedicle screw implantation guide

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a percutaneous pedicle screw implantation guide.

Background

Pedicle screws are utility models with milestone significance in the development history of modern spinal surgery. The pedicle screw belongs to internal fixation, namely, screws are arranged, the pedicle screw is driven from the rear of the pedicle to the front vertebral body, and after being connected through the pedicle screw, the pedicle screw has stronger fixation effect on the whole spine. Internal fixation of the spine may be used for trauma, such as fracture reduction; deformity correction, such as scoliosis kyphosis deformity; can be used for treating degenerative diseases of spine, including prolapse of intervertebral disc, spinal stenosis, cervical spondylosis, and unstable spine after decompression operation. The pedicle screw is an internal fixing instrument commonly used in spinal surgery, provides strong fixation for spinal surgery, enables a patient to take off the bed in early stage after the surgery is completed, and is beneficial to recovery.

In lumbar fusion surgery, pedicle screw placement is a very important procedure, and the quality depends on the screw feeding point, the screw feeding angle, the screw diameter, the screw feeding depth and the level of an operator, while the selection of the entrance and the selection of the near-screw angle are particularly important as the first step. Clinically, the staple feeding point is commonly used as a herringbone crest vertex (a junction of a paraspinal crest and a isthmus crest on the posterior lateral side of the root of an upper articular process), or a longitudinal axis intersection point of a transverse axis midline and the lateral side of a facet joint, and it is seen that the transverse process and the facet joint are particularly important in guiding the staple feeding point.

To date, in order to reduce the screw setting difficulty of pedicle screws and improve the screw setting precision, many technologies have been used in clinic, such as using auxiliary technologies of a C-arm machine, CT three-dimensional reconstruction assistance, computer navigation and the like, but in order to well reduce the ray exposure in surgery of a surgeon, reduce the operation time, and simplify the learning training period of the surgeon, a freehand screw setting technology is still the most ideal operation method, and has the advantages of safety, repeatability and reliability, and the difficulty is only in the selection of a screw feeding point and the change of a screw inclination angle, but no better auxiliary method or tool is matched with the freehand screw setting technology so far to determine the degree of screw head inclination or tail inclination.

Disclosure of Invention

In order to overcome the defects of the prior art, the utility model provides a percutaneous pedicle screw implantation guide, which solves the traditional problems, can be well matched with a freehand screw implantation technology, can be used for more accurately implanting pedicle screws, reduces the screw implantation difficulty of the pedicle screws, and improves the screw implantation precision.

The utility model is realized by adopting the following technical scheme:

the percutaneous pedicle screw imbedding guide comprises a grab handle, a guide channel with an inward inclination angle and transverse process feet, wherein the guide channel is biased to one side of the grab handle and penetrates through the grab handle up and down, and the transverse process feet are positioned below the guide channel.

Preferably, the grab handle is in a cylindrical structure.

Preferably, the inward inclination angle of the guide channel is 5 ° -15 °.

Preferably, the inward inclination angle of the guide channel is one of 5 °, 10 °, and 15 °.

Preferably, the guide channel is 3mm from the left side of the grip.

Preferably, the transverse process feet are of a pointed, expandable structure.

Compared with the prior art, the utility model has the beneficial effects that:

the percutaneous pedicle screw implantation guide device utilizes transverse process fixed points, is accurately positioned near the vertex of a herringbone crest through the guide channel which is provided with the opening, the open circuit and the ball probe for implantation, solves the problem that the opening is easy to slide down when the percutaneous pedicle screw is implanted, can be matched with the freehand screw implantation technology better, can be used for more accurately implanting the pedicle screw, reduces the screw implantation difficulty of the pedicle screw, improves the screw implantation precision, and is worthy of clinical popularization.

Drawings

FIG. 1 is a schematic elevational view of a percutaneous pedicle screw placement guide of the utility model;

fig. 2 is a top view of the percutaneous pedicle screw placement guide shown in fig. 1.

In the figure: 10. percutaneous pedicle screw placement into the guide; 11. a grab handle; 12. a guide channel; 13. transverse process feet.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present utility model, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

Referring to fig. 1-2, a percutaneous pedicle screw insertion guide 10 according to a preferred embodiment of the utility model is used to fit a freehand screw insertion technique, and can be used to more accurately insert pedicle screws, the percutaneous pedicle screw insertion guide 10 includes a handle 11, a guide channel 12 with an inward inclination angle, and transverse process legs 13 (left and right, respectively), the guide channel 12 is biased to one side of the handle 11 and is disposed vertically through the handle 11, and the transverse process legs 13 are positioned below the guide channel 12 (fig. 1-2); the device fully utilizes the transverse processes to position, utilizes the distance characteristic of the vertex of the herringbone crest and the transverse processes to quickly position the vertex of the herringbone crest, ensures that each guide has a certain horizontal needle inserting angle, can ensure a certain inward inclination, can accurately position the opening position of the percutaneous pedicle screw placement guide 10, has a certain stability, solves the problem that the opening easily slides from the auxiliary processes, reduces perspective times, can better match with the freehand screw placement technology, can more accurately place pedicle screws, reduces the screw placement difficulty of the pedicle screws, and simultaneously improves the screw placement precision.

In one embodiment, the grip 11 is of a generally cylindrical configuration so as to provide a good placement of the guide channel 12 therein.

In this embodiment, the inward inclination of the guide channel 12 is 5 ° -15 °. Preferably, the guide channel 12 has an internal inclination angle of one of 5 °, 10 °, 15 °, i.e. the passage has two upper and lower ports, and the internal inclination angle may be designed to be 5 °, 10 °, 15 °.

In this embodiment, the guide channel 12 is spaced about 3mm from the left side of the grip 11 to correspond to the herringbone crest by about 3mm from the upper side of the transverse process for the convenience of the subsequent operation.

The working principle is as follows:

in the minimally invasive lumbar decompression fusion operation, after perspective, the transverse process positioned on the target vertebral body is expanded step by soft tissue, percutaneous pedicle screws are placed into the guide, so that transverse process feet 13 are erected on the transverse process, the guide is gradually close to the facet joint, a straight opening, a straight open circuit and a ball probe are placed along the hollow guide channel 12, the ball probe is reserved to exit the guide, and tapping and screw placement are continuously completed.

In other embodiments, the percutaneous pedicle screw placement guide 10 may be designed with the transverse process foot as a spreadable tip that is advanced into the transverse process in the form of a pointed tip, and the device on the handle is rotated to spread the transverse process foot while being capable of being screwed in reverse to bite into the transverse process to prevent displacement.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (6)

1. The percutaneous pedicle screw imbedding guide device is characterized by comprising a grab handle, a guide channel with an inward inclination angle and transverse process feet, wherein the guide channel is biased to one side of the grab handle and penetrates through the grab handle up and down, and the transverse process feet are positioned below the guide channel.

2. The percutaneous pedicle screw placement guide as claimed in claim 1, wherein the grip is of cylindrical configuration.

3. The percutaneous pedicle screw placement guide as claimed in claim 1, wherein the guide channel has an internal inclination of 5 ° -15 °.

4. A percutaneous pedicle screw placement guide as claimed in claim 3, wherein the guide channel has an internal inclination of one of 5 °, 10 °, 15 °.

5. The percutaneous pedicle screw placement guide as claimed in claim 1, wherein the guide channel is 3mm from the left side of the handle.

6. The percutaneous pedicle screw placement guide as claimed in claim 1, wherein the transverse process foot is of a spreadable pointed configuration.