CN221180500U - Vertebral body stretching pressurizer - Google Patents

Abstract

The utility model belongs to the technical field of vertebral body treatment, and particularly relates to a vertebral body expanding pressurizer, which comprises a main body, wherein rectangular through grooves are formed in two sides of the main body, a left distance adjusting block and a right distance adjusting block which are adjusted in a lifting mode are arranged on the main body and are respectively in sliding fit with the rectangular through grooves, a distance adjusting rotating shaft is rotatably arranged in the main body, racks are arranged on the left distance adjusting block and the right distance adjusting block, the racks on the left distance adjusting block and the right distance adjusting block are arranged in opposite directions, and the distance adjusting rotating shaft is meshed with the racks on the left distance adjusting block and the right distance adjusting block. According to the scheme, the left distance adjusting block and the right distance adjusting block can be adjusted by rotating the distance adjusting rotating shaft through the instrument, so that the vertebral body is unfolded, the operation is simple and convenient, the operation steps are fewer, and the operation time and the experience requirement of doctors are greatly shortened; the proposal is also applicable to the younger patients, and can adjust the interval between vertebral bodies according to the development condition.

Description

Vertebral body stretching pressurizer

Technical Field

The utility model belongs to the technical field of vertebral body treatment, and particularly relates to a vertebral body expanding pressurizer.

Background

The main approaches currently on the market for treating vertebral compression fracture are PVP (percutaneous vertebroplasty), PKP (kyphoplasty), internal fixation of vertebroplasty screws, etc. All of the above approaches require filling with bone cement to restore vertebral body height during treatment.

If bone cement is used for filling in the prior art, the long-term curative effect is not ideal, the implantation of the bone cement needs to be avoided for young people, if the bone cement is implanted in early stage, the situations of bone cement ectopic, kyphosis deformity and the like are easy to appear in the young people, and if the operation is performed again at this time, the better curative effect is not generated, and a plurality of sequelae are generated. If the existing equipment is used for expanding the vertebral body, the publication number is: the utility model patent of CN219147708U mainly adjusts the positions of two stretching arms on a rack through a stretching arm position adjusting mechanism. However, when two supporting arms are used, two adjusting rods are required to be independently screwed to adjust the positions of the supporting rods, the adjusting process is complicated, and the operation steps are increased.

Disclosure of Invention

The utility model aims to provide a vertebral body expanding pressurizer which is simple to adjust and can be adjusted according to the development condition of a patient, so as to solve the technical problem that bone cement cannot be adjusted according to the development condition of the patient in the prior art, and further the bone cement is displaced.

The aim of the utility model can be achieved by the following technical scheme: a vertebral body spreading pressurizer comprises a main body, rectangular through grooves are formed in two sides of the main body, a left distance adjusting block and a right distance adjusting block which are adjusted in a lifting mode are mounted on the main body, and the left distance adjusting block and the right distance adjusting block are in sliding fit with the rectangular through grooves respectively.

As further optimization or improvement of this scheme, main part inside rotation is installed the roll adjustment pivot, all be provided with the rack on left roll adjustment piece and the right roll adjustment piece, and the rack relative direction setting on left roll adjustment piece and the right roll adjustment piece, roll adjustment pivot all meshes with the rack on left roll adjustment piece and the right roll adjustment piece, set up first backset in the main part, install snap ring two on the first backset, snap ring two cooperates with the spiral cover, rotate in the main part and install the ratchet, and ratchet butt roll adjustment pivot.

As a further optimization or improvement of the scheme, the main body and the ratchet are provided with special-shaped holes with the same shape, torsion springs and bolts are respectively arranged in the special-shaped holes, and two ends of each torsion spring and each bolt are respectively connected with the main body and the ratchet.

As further optimization or improvement of this scheme, the main part is kept away from the inside of first clearance groove and has been seted up the inside groove, installs snap ring one on the inside groove, the second clearance groove has been seted up to the one end that the clearance adjustment pivot kept away from first clearance groove, and second clearance groove and snap ring one cooperate.

As a further optimization or improvement of the scheme, the whole shape of the left distance adjusting block is C-shaped, and the whole shape of the right distance adjusting block is T-shaped.

As a further optimization or improvement of the scheme, the rotating grooves are formed in the rotating cover and the distance-adjusting rotating shaft.

The utility model has the beneficial effects that:

(1) The scheme is made of titanium alloy materials, has no artifact in CT/MRI, does not shield imaging of diseased parts and other implants, and is favorable for doctors to analyze and judge the disease conditions and track and observe the treatment conditions.

(2) According to the scheme, the distance adjusting blocks can be adjusted left and right by rotating the distance adjusting rotating shaft through the instrument, so that the vertebral bodies are spread, the operation is simple and convenient, the operation steps are fewer, and the operation time and the experience requirement on doctors are greatly shortened.

(3) The pure titanium coating is arranged on the surface of the proposal, which is beneficial to bone growth and accelerates fusion.

(4) The proposal is also applicable to the younger patients, and can adjust the interval between vertebral bodies according to the development condition.

(5) The adjustable vertebra size range is wider due to the adjustable property.

(6) The design of the appearance of the scheme is uniform and reasonable, the stress generated to the adjacent vertebral bodies is small, and the risk of secondary fracture is reduced.

(7) The material used in the scheme is a titanium alloy material applied clinically for many years, and has stable performance, and no physical and chemical reaction can be generated to damage human nerves and tissues.

Drawings

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of the overall structure of the present utility model.

Fig. 2 is an exploded view of the overall structure.

Fig. 3 is a schematic structural view of the tail of the body.

Fig. 4 is a schematic view of the structure of the inside of the screw cap.

The drawing is marked as: 1. a main body; 2. a left distance adjusting block; 3. a right distance adjusting block; 4. screwing the cover; 5. a clamping ring I; 6. a distance-adjusting rotating shaft; 7. a second clamping ring; 8. a torsion spring; 9. a plug pin; 10. a ratchet.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, a vertebral body spreading pressurizer comprises a main body 1, rectangular through grooves are formed in two sides of the main body 1, a left distance adjusting block 2 and a right distance adjusting block 3 which are adjusted in a lifting mode are installed on the main body 1, and the left distance adjusting block 2 and the right distance adjusting block 3 are respectively in sliding fit with the rectangular through grooves.

It should be noted that, each component in this scheme is made by machining titanium alloy (TC 4) material, and the overall shape of the main body 1 component is a bullet-like structure, and this design facilitates better implantation into the vertebral body. The hollow structure of the main body 1 can be matched with the distance-adjusting rotating shaft 6. The head (arc end) of the main body 1 is provided with an inner groove which is matched with the first clamping ring 5 to achieve the purposes of limiting the forward and backward movement and preventing the distance-adjusting rotating shaft 6 from falling. Rectangular through grooves are formed in two sides of the main body 1 (the main body 1 is not cut), the left distance adjusting block 2 and the right distance adjusting block 3 can move left and right, and meanwhile the left distance adjusting block 2 and the right distance adjusting block 3 are limited to be separated from each other vertically. The tail of the main body 1 is provided with a first tool retracting groove and a special-shaped hole, and the ratchet 10 is provided with the special-shaped hole consistent with the main body 1. The first tool retracting groove is used for being matched with the second clamping ring 7 and the screw cap 4 to connect all the parts into a whole. The torsional spring 8 and the bolt 9 are placed in the special-shaped holes of the main body 1 and the ratchet 10, and the main body 1 is connected with the ratchet 10 through the torsional spring 8 and the bolt 9, so that the purposes are as follows: when the distance-adjusting rotating shaft 6 is rotated, the distance-adjusting rotating shaft 6 generates a relative action with the ratchet 10, the distance-adjusting rotating shaft 6 drives the ratchet 10 to rotate, the ratchet 10 can return to the original position after the relative movement is finished, the distance-adjusting rotating shaft 6 is limited to rotate clockwise only, and the situation that the distance-adjusting rotating shaft 6 is driven to rotate when the left distance-adjusting block 2 and the right distance-adjusting block 3 are compressed by vertebral bodies is avoided, so that the opening action of the scheme fails.

Referring to fig. 2, the overall shape of the left distance adjusting block 2 is C-shaped, and the overall shape of the right distance adjusting block 3 is T-shaped.

The whole structure of the left distance adjusting block 2 is C-shaped, and can be matched with the right distance adjusting block 3 to form a cuboid structure. The left side surface of the left distance adjusting block 2 is sprayed with a titanium coating, and after the titanium coating is implanted into a human body, the porous structure of the titanium coating can be fused with bones. The rack structure is designed below the left distance adjusting block 2, so that the rack is matched with a gear of the distance adjusting rotating shaft 6, and the left distance adjusting block 2 can move leftwards when the distance adjusting rotating shaft 6 is rotated clockwise. The last tooth of the rack structure is higher than other teeth, and the aim is that: limiting the moving distance of the left distance adjusting block 2 prevents the left distance adjusting block 2 from excessively extending, so that the left distance adjusting block 2 is separated from the main body 1, and the situation that the left distance adjusting block 2 cannot be recovered when the distance adjusting rotating shaft 6 rotates anticlockwise is avoided.

The whole structure of the right distance adjusting block 3 is T-shaped, and can be matched with the left distance adjusting block 2 to form a cuboid structure. The right side surface of the right distance adjusting block 3 is sprayed with a titanium coating, and after the titanium coating is implanted into a human body, the porous structure of the titanium coating can be fused with bones. A rack structure is designed above the right distance adjusting block 3, so that the rack is matched with a gear of the distance adjusting rotating shaft 6, and the right distance adjusting block 3 can move to the right side when the distance adjusting rotating shaft 6 is rotated clockwise. The last tooth of the rack structure is higher than other teeth, and the purpose is that: limiting the moving distance of the right distance adjusting block 3 prevents the right distance adjusting block 3 from excessively extending, so that the right distance adjusting block 3 is separated from the main body 1, and the situation that the right distance adjusting block 3 cannot be recovered when the distance adjusting rotating shaft 6 rotates anticlockwise is avoided.

Referring to fig. 2, the main body 1 is internally provided with a distance adjusting rotating shaft 6 in a rotating manner, the left distance adjusting block 2 and the right distance adjusting block 3 are respectively provided with racks, the racks on the left distance adjusting block 2 and the right distance adjusting block 3 are oppositely arranged, the distance adjusting rotating shaft 6 is meshed with the racks on the left distance adjusting block 2 and the right distance adjusting block 3, the main body 1 is provided with a first tool retracting groove, the first tool retracting groove is provided with a clamping ring two 7, the clamping ring two 7 is matched with the rotary cover 4, the main body 1 is rotatably provided with a ratchet 10, and the ratchet 10 is abutted against the distance adjusting rotating shaft 6.

It should be noted that, the distance-adjusting shaft 6 is a shaft part, and the second tool retracting groove on the head of the distance-adjusting shaft 6 is matched with the first snap ring 5 and the inner groove of the main body 1, so as to prevent the distance-adjusting shaft 6 from falling out of the main body 1 and keep the distance-adjusting shaft 6 rotatable. The rotating groove of the inner hexagon at the tail of the distance-adjusting rotating shaft 6 can be matched with an instrument to rotate to drive the left distance-adjusting block 2 and the right distance-adjusting block 3, so as to achieve the purpose of expanding the vertebral body.

Specifically, the main body 1 and the ratchet 10 are provided with special-shaped holes with the same shape, the special-shaped holes are respectively provided with a torsion spring 8 and a bolt 9, and two ends of the torsion spring 8 and the bolt 9 are respectively connected with the main body 1 and the ratchet 10.

Specifically, the main body 1 is far away from the inside of the first tool retracting groove and is provided with an inner groove, a first clamping ring 5 is arranged on the inner groove, one end of the distance adjusting rotating shaft 6, which is far away from the first tool retracting groove, is provided with a second tool retracting groove, and the second tool retracting groove is matched with the first clamping ring 5.

It should be noted that, the overall structure of the first snap ring 5 and the second snap ring 7 is cylindrical, the size of the outer circle of the first snap ring 5 is slightly larger than the hollow hole of the main body 1, the size of the through hole of the first snap ring 5 is smaller than the outer circle of the distance-adjusting rotating shaft 6, but is larger than the diameter of the outer circle of the tool withdrawal groove of the distance-adjusting rotating shaft 6. The transverse cross sections of the first clamping ring 5 and the distance-adjusting rotating shaft 6 are C-shaped, the C-shaped structure can allow the first clamping ring 5 and the second clamping ring 7 to deform slightly, the first clamping ring 5 and the second clamping ring 7 are firstly pressed into a tool retracting groove of the distance-adjusting rotating shaft 6 in the assembly process of the main body 1 and the distance-adjusting rotating shaft 6 and the first clamping ring 5, then the distance-adjusting rotating shaft 6 and the first clamping ring 5 are assembled into the main body 1, the first clamping ring 5 is extruded to elastically deform when the first clamping ring 5 is plugged into the main body 1, and at the moment, the size of the clamping ring is smaller than that of an original state, and a hollow hole of the main body 1 can be formed. When the clamping ring I5 moves to the inner groove structure of the main body 1, the clamping ring I5 is restored to the original state due to the material characteristics, and further the forward and backward movement of the distance-adjusting rotating shaft 6 can be limited. The assembly action principle of the second clamping ring 7 at the tail part of the main body 1 and the spiral cover 4 is identical to the principle.

It should be noted that, when the distance-adjusting shaft 6 is rotated, the ratchet 10 is simultaneously driven to rotate, and the ratchet 10 can return to the original position through the physical property of the torsion spring 8. The circular arc surface of the ratchet 10 part can be matched with the rotary cover 4, when the rotary cover 4 is rotated, the ratchet 10 can be driven to rotate together due to the size design of the contact surface of the circular arc surface of the ratchet 10 and the rotary cover 4, so that the ratchet 10 is separated from the distance-adjusting rotating shaft 6, and the distance-adjusting rotating shaft 6 can rotate anticlockwise.

It should be noted that the torsion spring 8 has a structure consistent with that of common products in the market, and the torsion spring 8 is made of titanium alloy (TC 4) material. The function in the invention: after the ratchet 10 rotates on the distance-adjusting rotating shaft 6 to drive the ratchet 10 to do relative motion, the ratchet 10 returns to the original position to limit the counterclockwise rotation of the distance-adjusting rotating shaft 6. The bolt 9 is cylindrical in structure, action in this scheme: providing a pivot for rotation of the ratchet 10.

Referring to fig. 2-4, both the screw cap 4 and the distance-adjusting shaft 6 are provided with a rotating groove.

Referring to fig. 4, the outer shape of the cap 4 is cylindrical. One end of the rotary shaft is provided with an inner hexagon which can be matched with the instrument to rotate, and the inner hexagon is larger than the inner hexagon on the distance-adjusting rotary shaft 6, so that the rotary shaft can be prevented from rotating simultaneously when the instrument is used. The internal notch (near inner hexagonal end) structure is a reserved ratchet 10 rotation gap, and when the distance-adjusting rotating shaft 6 is rotated to drive the ratchet 10 to rotate, the rotary cover 4 is prevented from interfering the ratchet 10 to rotate. The step surface (the same plane with the internal notch) in the spiral cover 4 acts as follows: when the rotary cover 4 rotates to a certain degree, no gap exists between the rotary cover 4 and the ratchet 10, and larger friction force is generated to drive the ratchet 10 to rotate simultaneously to provide space for the counterclockwise rotation of the distance-adjusting rotating shaft 6.

The solution also solves the following problems.

First: due to the characteristics of bone cement, bone cement is prone to leakage during implantation, which is the most common complication in PVP and PKP operations, and leakage can be classified into intervertebral disc leakage, intravertebral leakage, paravertebral soft tissue leakage, paravertebral vein leakage, and the like. Leakage can lead to serious consequences such as numbness of the lower extremities, spinal cord injury, pulmonary embolism, etc.

Second,: because of the fluidity of the bone cement, the bone cement can flow in multiple directions when being injected into the vertebral body, so that the accuracy of judging whether the bone cement leaks or not by using a C-arm machine in the operation process is low, and whether the bone cement leaks or not can not be well observed. Further increasing the risk. Meanwhile, the fluidity of the bone cement causes uneven shape of the cooled bone cement, and secondary fracture is easy to occur.

Third,: the high temperatures emitted by the bone cement when cooled can cause necrosis of peripheral nerve endings and cells at the implant site.

Fourth,: the vertebral body height is restored by filling the bone cement, the control on the dosage of the bone cement is more strict, the dosage of the bone cement is too small, the collapse symptom of the vertebral body can not be relieved, the vertebral body can still collapse, and the dosage is too large, so that the vertebral body is easy to leak and various complications are generated. And the collapse degree and the volume of each vertebral body are different. Has high requirement on the experience of doctors.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims (6)

1. A vertebral body distraction pressurizer, characterized in that: the lifting type adjustable left-right spacing adjusting device comprises a main body (1), rectangular through grooves are formed in two sides of the main body (1), a lifting adjusting left spacing adjusting block (2) and a lifting adjusting right spacing adjusting block (3) are arranged on the main body (1), and the left spacing adjusting block (2) and the right spacing adjusting block (3) are respectively in sliding fit with the rectangular through grooves.

2. A vertebral body distraction pressurizer according to claim 1, wherein: the novel automatic adjusting device is characterized in that the main body (1) internally rotates and installs a distance adjusting rotating shaft (6), racks are arranged on the left distance adjusting block (2) and the right distance adjusting block (3), the opposite directions of the racks on the left distance adjusting block (2) and the right distance adjusting block (3) are set, the distance adjusting rotating shaft (6) is meshed with the racks on the left distance adjusting block (2) and the right distance adjusting block (3), a first tool retracting groove is formed in the main body (1), a second clamping ring (7) is installed on the first tool retracting groove, the second clamping ring (7) is matched with the rotary cover (4), ratchets (10) are installed on the main body (1) in a rotating mode, and the ratchets (10) are abutted to the distance adjusting rotating shaft (6).

3. A vertebral body distraction pressurizer according to claim 1, wherein: the main body (1) and the ratchet (10) are provided with special-shaped holes with the same shape, a torsion spring (8) and a bolt (9) are respectively arranged in the special-shaped holes, and two ends of the torsion spring (8) and the bolt (9) are respectively connected with the main body (1) and the ratchet (10).

4. A vertebral body distraction pressurizer according to claim 2, wherein: an inner groove is formed in the main body (1) away from the first tool retracting groove, a first clamping ring (5) is mounted on the inner groove, a second tool retracting groove is formed in one end, away from the first tool retracting groove, of the distance adjusting rotating shaft (6), and the second tool retracting groove is matched with the first clamping ring (5).

5. A vertebral body distraction pressurizer according to claim 1, wherein: the whole shape of the left distance adjusting block (2) is C-shaped, and the whole shape of the right distance adjusting block (3) is T-shaped.

6. A vertebral body distraction pressurizer according to claim 2, wherein: both the spiral cover (4) and the distance-adjusting rotating shaft (6) are provided with rotating grooves.