CN216455264U - Vertebral pedicle screw sliding wire extractor - Google Patents

Abstract

The utility model provides a vertebral pedicle screw slick thread extractor which comprises a fixed arm, a sliding arm and a pull rod, wherein the sliding arm is connected to the fixed arm in a sliding mode, the fixed arm is provided with a first clamping arm, the sliding arm is provided with a second clamping arm, clamping grooves capable of being clamped with vertebral pedicle screw bolts are formed in the positions, opposite to the first clamping arm and the second clamping arm, of the first clamping arm, the second clamping arm, and the pull rod is arranged on the sliding arm and can control the sliding arm to slide back and forth along the length direction of the fixed arm.

Description

Vertebral pedicle screw sliding wire extractor

Technical Field

The utility model relates to the field of medical supplies, in particular to a sliding thread extractor for pedicle screws.

Background

As shown in fig. 3 and 4, for the non-fusion internal fixation operation of spinal fracture, after the spinal fracture heals, a secondary operation is often required to take out the internal fixation object (namely, pedicle screw) so as to restore the movement between the vertebras of the fixed segment and prevent the long-term postoperative lumbar and dorsal stiffness and pain. However, the situation that the pedicle screw tail nut cannot be smoothly removed due to the fact that the tail nut slides when the pedicle screw and the tail nut are excessively locked and removed, a screwdriver is broken due to fatigue, nut holes are blocked, and the like is occasionally encountered clinically.

When the screw cap of the pedicle screw slides, the following methods are generally adopted: 1. carrying out high-speed grinding and cutting of a smooth wire by using a tungsten steel drill; 2. polishing the titanium alloy pedicle screw by using a high-speed grinding drill; 3. the connecting rod and the pedicle screw are sheared and chiseled by using a large force shear, a bone knife, an osteotome and the like. The above-mentioned several kinds of modes produce more heat when polishing, produce the thermal damage to surrounding tissue to can produce a large amount of metal fragments, some probably because the high kinetic energy reason leaves the art field, spreads in the position of keeping away from the art field, leads to the difficult thorough clear away clean in later stage, and serious person, metal fragments can fly into peripheral small blood vessel, leads to the perforation of blood vessel, the hemorrhage, even gets into the blood vessel, reaches the blood vessel stenosis department along with blood circulation and causes the vascular embolism.

Based on the above, how to conveniently, quickly and safely take out the sliding screw cap of the pedicle screw becomes a direction which needs to be researched by the technical field personnel.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcome the deficiencies of the prior art and to provide a pedicle screw sliding wire extractor to solve the problems set forth in the background of the prior art.

The purpose of the utility model is realized by the following technical scheme:

the utility model provides a pedicle of vertebral arch screw smooth silk extractor, includes fixed arm, sliding arm and pull rod, sliding arm sliding connection is in on the fixed arm, the fixed arm has first centre gripping arm, and the sliding arm has second centre gripping arm, be equipped with the centre gripping groove that can with the bolt joint of pedicle of vertebral arch screw on the position that first centre gripping arm and second centre gripping arm are relative, the pull rod is located on the sliding arm and steerable sliding arm makes a round trip to slide along the length direction of fixed arm.

In the above utility model, furthermore, the fixed arm still includes the slide rail and locates the bracing piece of a slide rail tip, first centre gripping arm is fixed to be located the top of bracing piece.

In the above utility model, furthermore, the slide arm still includes the slide bar of bottom sliding connection on the slide rail, and second centre gripping arm is fixed to be located the top of slide bar.

In the above utility model, furthermore, the slide rail is the i shape slide rail, the bottom of slide bar be equipped with i shape slide rail complex slider, the slide bar passes through slider and i shape slide rail sliding connection.

In the above-mentioned utility model, it is further that first centre gripping arm sets up with the bracing piece is mutually perpendicular, second centre gripping arm sets up with the slide bar is mutually perpendicular.

In the above-mentioned utility model, it is further, the well upper portion of slide bar is equipped with the screw hole, be equipped with the external screw thread on the pull rod, the pull rod passes through screw hole and external screw thread connection are on the slide bar.

In the above utility model, further, a handle is provided on the pull rod.

The utility model has the beneficial effects that: the utility model can take the screw cap of the slide wire out of the bolt of the pedicle screw, avoids the side damage to surrounding tissues caused by metal polishing and cutting and violent removal of the slide wire nut, improves the operation safety, reduces the operation time and avoids the occurrence of operation complications.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of a connecting structure of a pull rod and a sliding arm according to the present invention;

FIG. 3 is an elevation view of a pedicle screw in an embodiment of the utility model;

FIG. 4 is a top view of a pedicle screw in an embodiment of the utility model;

FIG. 5 is a schematic view of a clamping groove according to the present invention;

fig. 6 is a working principle diagram of the present invention.

In the figure, 1-fixed arm, 1.1-first clamping arm, 1.2-sliding rail, 1.3-supporting rod, 2-sliding arm, 2.1-second clamping arm, 2.2-sliding rod, 2.3-sliding block, 3-pull rod, 3.1-external thread, 3.2-handle, 4-clamping groove, 5-threaded hole, 6-pedicle screw, 6.1-bolt and 7-nut.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.

It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.

Example (b):

a vertebral pedicle screw sliding thread extractor is shown in the attached drawings 1-6 and comprises a fixed arm 1, a sliding arm 2 and a pull rod 3, wherein the sliding arm 2 is connected to the fixed arm 1 in a sliding mode, the fixed arm 1 is provided with a first clamping arm 1.1, the sliding arm 2 is provided with a second clamping arm 2.1, a clamping groove 4 capable of being clamped with a bolt 6.1 of a vertebral pedicle screw 6 is formed in the position, opposite to the first clamping arm 1.1 and the second clamping arm 2.1, of the first clamping arm 1, the second clamping arm is provided with a clamping groove 4, and the pull rod 3 is arranged on the sliding arm 2 and can control the sliding arm 2 to slide back and forth along the length direction of the fixed arm 1.

Concretely, fixed arm 1 still includes slide rail 1.2 and locates the bracing piece 1.3 of a slide rail 1.2 tip, first centre gripping arm 1.1 is fixed to be located bracing piece 1.3's top, slide arm 2 still includes bottom sliding connection slide bar 2.2 on slide rail 1.2, and second centre gripping arm 2.1 is fixed to be located slide bar 2.2's top, first centre gripping arm 1.1 and bracing piece 1.3 perpendicular setting of each other, second centre gripping arm 2.1 and slide bar 2.2 perpendicular setting of each other

More specifically, the slide rail 1.2 is an i-shaped slide rail, the bottom of the slide bar 2.2 is provided with a slide block 2.3 matched with the i-shaped slide rail, and the slide bar 2.2 is connected with the i-shaped slide rail 1.2 in a sliding manner through the slide block 2.3.

In the above embodiment, preferably, the middle upper portion of the sliding rod 2.2 is provided with a threaded hole 5, the pull rod 3 is provided with a handle 3.2, the pull rod 3 is provided with an external thread 3.1, and the pull rod 3 is connected to the sliding rod 2.2 through the threaded hole 5 and the external thread 3.1.

Referring to fig. 3 and 4, the bolt 6.1 of the pedicle screw 6 has threads, and the nut 7 is screwed on the bolt 6.1, so that the nut 7 is easy to slide in the bolt 6.1 clinically, and the aim of the present invention is to take out the nut 7 which slides from the bolt 6.1.

When the sliding wire clamp is used specifically, the pull rod 3 is connected to the sliding arm 2 in a threaded mode, the position of the sliding arm 2 is adjusted along the sliding rail 1.2 through the pull rod 3, please refer to fig. 6 continuously, the bolts 6.1 on the two sides of the pedicle screw 6 are clamped into the clamping grooves 4 of the first clamping arm 1.1 and the second clamping arm 2.2 respectively, after clamping, pulling force is applied to the pull rod 3, the bolts 6.1 deform towards the two sides, and the nuts 7 are loosened on the bolts 6.1, so that the nuts 7 of the sliding wire can be taken out of the bolts 6.1.

The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims (7)

1. The utility model provides a pedicle of vertebral arch screw smooth silk extractor, its characterized in that, includes fixed arm, sliding arm and pull rod, sliding arm sliding connection is in on the fixed arm, the fixed arm has first centre gripping arm, and the sliding arm has second centre gripping arm, be equipped with the centre gripping groove that can with the bolt joint of pedicle of vertebral arch screw on the position that first centre gripping arm and second centre gripping arm are relative, the pull rod is located on the sliding arm and steerable sliding arm makes a round trip to slide along the length direction of fixed arm.

2. The sliding thread extractor for pedicle screws according to claim 1, wherein the fixing arm further comprises a sliding rail and a supporting rod disposed at one end of the sliding rail, and the first clamping arm is fixedly disposed at the top end of the supporting rod.

3. The sliding screw extractor according to claim 2, wherein the sliding arm further comprises a sliding rod with a bottom slidably connected to the sliding rail, and the second clamping arm is fixedly disposed at a top end of the sliding rod.

4. The sliding screw extractor for pedicle screws according to claim 3, wherein the slide rail is an I-shaped slide rail, a slide block matched with the I-shaped slide rail is arranged at the bottom of the slide bar, and the slide bar is connected with the I-shaped slide rail in a sliding manner through the slide block.

5. The pedicle screw slick wire extractor of claim 4, wherein the first clamping arm is perpendicular to the support rod and the second clamping arm is perpendicular to the slide rod.

6. The sliding screw extractor for pedicle screws according to claim 4, wherein the sliding rod has a threaded hole at the middle upper portion thereof, and the pull rod has an external thread thereon, and is connected to the sliding rod through the threaded hole and the external thread.

7. The sliding thread extractor for pedicle screws as claimed in claim 1, wherein the pull rod is provided with a handle.

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