CN117281560A - Cervical vertebra lamina spreader capable of being spread in parallel - Google Patents

Abstract

The invention provides a cervical vertebra lamina spreader capable of being spread in parallel, and relates to the technical field of medical appliances. The cervical vertebra lamina spreader capable of being spread in parallel comprises a spreading clamp rod, a clamp handle and a parallel spreading piece; the stretching clamp rod comprises a first stretching clamp rod and a second stretching clamp rod, and the clamp handle comprises a first clamp handle and a second clamp handle; the parallel stretching piece comprises two sliding seats and at least two parallel driving rods, the stretching clamp rod is connected with the clamp handle through the sliding seats, one end of the sliding seat is fixedly connected with the stretching clamp rod, and the other end of the sliding seat is pivoted with the clamp handle; one end of the parallel driving rod is pivoted at the pivot joint of the sliding seat and the clamp handle, the other end of the parallel driving rod is slidably arranged in the chute of the other sliding seat, and the middle parts of the two parallel driving rods are pivoted with each other; when the first clamp handle and the second clamp handle are close to each other, the first opening clamp rod and the second opening clamp rod are far away from each other. The technical effect that the vertebral plate spreader is parallel to spread and is not easy to slip is achieved.

Description

Cervical vertebra lamina spreader capable of being spread in parallel

Technical Field

The invention relates to the technical field of medical appliances, in particular to a cervical vertebra lamina spreader capable of being spread in parallel.

Background

The cervical posterior approach single-door vertebral canal expansion and shaping operation is an important operation mode for treating cervical spondylosis at present, and the main indications of the operation mode are serious vertebral canal stenosis, posterior longitudinal ligament ossification, multi-section spinal cord cervical spondylosis and the like. The procedure generally requires that the left lamina root of the neck 3-6 or neck 3-7 vertebra be completely severed and the outer cortical bone of the right lamina root be resected, leaving its inner cortical bone intact to form the hinge side (the hinge side). After the osteotomy is completed, a vertebral plate spreader is generally used to spread the vertebral plate along the left osteotomy gap by taking the right osteotomy position as a rotation axis, so as to further enlarge the vertebral canal. The left lamina gap generally needs to be distracted by more than 6-8 mm. Most of the existing vertebral plate distracters in the market are pressurized and distracted in a non-parallel mode, slipping is easy to occur, and the possibility of potential damage to spinal cord exists.

Disclosure of Invention

The invention aims to provide a cervical vertebra lamina spreader capable of being spread in parallel, so as to solve the technical problem that the cervical vertebra lamina spreader in the prior art cannot be spread in parallel and is easy to slip.

In a first aspect, an embodiment of the present invention provides a cervical vertebra lamina spreader capable of spreading in parallel, including a spreading clamp rod, a clamp handle and a parallel spreading member;

the expanding clamp rod comprises a first expanding clamp rod and a second expanding clamp rod, the clamp handles comprise a first clamp handle and a second clamp handle, a pivot seat is arranged on the first clamp handle, and a pivot block matched with the pivot seat is arranged on the second clamp handle;

the parallel stretching piece comprises two sliding seats and at least two parallel driving rods, the stretching clamp rod is connected with the clamp handle through the sliding seats, one end of the sliding seat is fixedly connected with the stretching clamp rod, and the other end of the sliding seat is pivoted with the clamp handle;

one end of the parallel driving rod is pivoted at the pivot joint of the sliding seat and the clamp handle, the other end of the parallel driving rod is slidably arranged in the sliding groove of the other sliding seat, and the middle parts of the two parallel driving rods are pivoted with each other;

when the first clamp handle and the second clamp handle are close to each other, the first opening clamp rod and the second opening clamp rod are far away from each other.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a mounting hole is formed on the parallel driving rod, a connection pin shaft is installed in the mounting hole, and the connection pin shaft is slidably disposed in the chute.

With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a reset elastic member is disposed between the first clamp handle and the second clamp handle.

With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the cervical vertebral plate spreader capable of being spread in parallel further includes an anti-falling assembly;

the anti-drop component is arranged at the front ends of the first opening clamp rod and the second opening clamp rod.

With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the anti-falling assembly includes a rear stop and a front stop;

the first opening clamp rod and the second opening clamp rod are both provided with the rear stop block, and the front end of the first opening clamp rod is provided with the front stop block.

With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, wherein a friction surface is provided between the front stop and the rear stop on the first expanding clamp rod;

and a friction surface is arranged between the front end of the second stretching clamp rod and the rear stop block.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the friction surface uses a plurality of teeth, and a plurality of the teeth are arranged at equal intervals.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where an indication caliper for indicating a spreading distance between the first spreading clamp rod and the second spreading clamp rod is provided on the second clamp handle.

With reference to the first aspect, an embodiment of the present invention provides a possible implementation manner of the first aspect, where the indication caliper is provided with a blocking block for limiting a maximum spreading distance between the first spreading clamp rod and the second spreading clamp rod, and the blocking block can be abutted with the first clamp handle.

With reference to the first aspect, the embodiment of the present invention provides a possible implementation manner of the first aspect, wherein the indication caliper is provided with a ratchet, and the first caliper handle is provided with a clamping hole for connecting with the ratchet, and the diameter of the clamping hole is larger than the width of the indication caliper.

The beneficial effects are that:

the invention provides a cervical vertebra lamina spreader capable of being spread in parallel, which comprises a spreading clamp rod, a clamp handle and a parallel spreading piece; the stretching clamp rod comprises a first stretching clamp rod and a second stretching clamp rod, the clamp handle comprises a first clamp handle and a second clamp handle, a pivot seat is arranged on the first clamp handle, and a pivot block matched with the pivot seat is arranged on the second clamp handle; the parallel stretching piece comprises two sliding seats and at least two parallel driving rods, the stretching clamp rod is connected with the clamp handle through the sliding seats, one end of the sliding seat is fixedly connected with the stretching clamp rod, and the other end of the sliding seat is pivoted with the clamp handle; one end of the parallel driving rod is pivoted at the pivot joint of the sliding seat and the clamp handle, the other end of the parallel driving rod is slidably arranged in the chute of the other sliding seat, and the middle parts of the two parallel driving rods are pivoted with each other; when the first clamp handle and the second clamp handle are close to each other, the first opening clamp rod and the second opening clamp rod are far away from each other.

Specifically, when medical staff need prop up two and prop up the pincers pole in the operation in-process, medical staff inwards holds two pincers handles, and first pincers handle and second pincers handle are close to each other, and first pincers handle and second pincers handle are kept away from each other with the one end that struts the pincers pole and be connected this moment to drive two sliding seats, first and second and prop up the pincers pole and prop up, and through the setting of sliding seat and parallel piece that struts, make first and second prop up the pincers pole and prop up and can keep relatively parallel when propping up both, thereby first and second struts and can not appear slipping between pincers pole and the cervical vertebra lamina, reduces the probability of damaging the spinal cord.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a parallel distractor for cervical vertebrae plates according to an embodiment of the present invention;

fig. 2 is a partial schematic view of a parallel distractable cervical vertebra lamina distractor according to an embodiment of the invention.

Icon:

10-parallel spreader; 20-a sliding seat; 21-a chute; 30-parallel driving rods;

110-a first distraction clamp lever; 120-a second distraction clamp lever;

210-a first grip; 211-a pivot seat; 220-a second grip; 221-a pivot block; 230-indicating a caliper; 231-a blocking piece; 240-rough surface; 250-resetting elastic piece;

300-anti-drop assembly; 310-rear stop; 320-positive stop; 330—friction surface;

400-lamina.

Detailed Description

The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, 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 implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The invention will now be described in further detail with reference to specific examples thereof in connection with the accompanying drawings.

Referring to fig. 1 and 2, the present embodiment provides a cervical vertebra plate spreader capable of spreading in parallel, comprising a spreading clamp rod, a clamp handle and a parallel spreading member 10; the spreading clamp bar comprises a first spreading clamp bar 110 and a second spreading clamp bar 120, the clamp handles comprise a first clamp handle 210 and a second clamp handle 220, a pivot base 211 is arranged on the first clamp handle 210, and a pivot block 221 matched with the pivot base 211 is arranged on the second clamp handle 220; the parallel stretching piece 10 comprises two sliding seats 20 and at least two parallel driving rods 30, the stretching clamp rods are connected with the clamp handles through the sliding seats 20, one ends of the sliding seats 20 are fixedly connected with the stretching clamp rods, and the other ends of the sliding seats are pivoted with the clamp handles; one end of the parallel driving rod 30 is pivoted at the pivot joint of the sliding seat 20 and the clamp handle, the other end of the parallel driving rod 30 is slidably arranged in the chute 21 of the other sliding seat 20, and the middle parts of the two parallel driving rods 30 are pivoted with each other; when the first jaw handle 210 and the second jaw handle 220 are close to each other, the first spreader jaw bar 110 and the second spreader jaw bar 120 are far away from each other.

Specifically, when medical staff needs to prop open two stretching clamp bars in the operation process, the medical staff inwards holds the two clamp handles, the first clamp handle 210 and the second clamp handle 220 are close to each other, at the moment, the first clamp handle 210 and the second clamp handle 220 are far away from one end connected with the stretching clamp bars, so that the two sliding seats 20, the first stretching clamp bar 110 and the second stretching clamp bar 120 are driven to stretch, and the sliding seats 20 and the parallel stretching pieces 10 are arranged, so that the first stretching clamp bar 110 and the second stretching clamp bar 120 can be kept relatively parallel when being stretched, and sliding phenomena can not occur between the first stretching clamp bar 110 and the second stretching clamp bar 120 and the cervical vertebra lamina 400, and the probability of damaging spinal cord is reduced.

Wherein, the parallel driving rod 30 is provided with a mounting hole, a connecting pin shaft is arranged in the mounting hole, and the connecting pin shaft is arranged in the chute 21 in a sliding way.

It should be noted that, when the first forceps handle 210 and the second forceps handle 220 are far away from each other at the end connected with the spreading forceps rod, the two sliding seats 20 are driven to be far away simultaneously, and two ends of one parallel spreader 10 are respectively connected to the two sliding seats 20, and the connecting pin shaft on the parallel spreader 10 can slide in the sliding groove 21 of the sliding seat 20, so that in the process that the sliding seat 20 swings up along with the forceps handles, the parallel spreader 10 connected with each other pulls the two sliding seats 20 to be in a state of being parallel to each other, thereby ensuring that the first spreading forceps rod 110 and the second spreading forceps rod 120 are parallel to each other, so as to realize parallel spreading of the vertebral plate 400, and in the process of parallel spreading, the first spreading forceps rod 110 and the second spreading forceps rod 120 cannot slide with the vertebral plate 400, so that the probability of damaging the vertebral plate 400 is reduced.

It should be further noted that, the first forceps handle 210 and the second forceps handle 220 are pivotally connected to the corresponding sliding seats 20, and after the first forceps handle 210 and the second forceps handle 220 are pinched and close to each other to complete the distraction, the medical staff can manually pull the first forceps handle 210 and the second forceps handle 220 to make the first forceps handle 210 and the second forceps handle 220 rotate at angles relative to the two sliding seats 20, so as to expose the vertebral plate 400 below and reduce the influence on the surgical field.

Referring to fig. 1 and 2, in an alternative of the present embodiment, the cervical vertebra lamina spreader 400 includes an anti-disengaging assembly 300; the anti-falling assembly 300 is provided at the front ends of both the first and second spreading clamp bars 110 and 120.

Wherein the anti-drop assembly 300 includes a rear stop 310 and a front stop 320; the first and second spreader bars 110 and 120 are each provided with a rear stopper 310, and the front end of the first spreader bar 110 is provided with a front stopper 320.

Wherein a friction surface 330 is disposed between the front stop 320 and the rear stop 310 on the first spreading clamp bar 110; a friction surface 330 is provided between the front end of the second spreader strut 120 and the rear stop 310.

Wherein, friction surface 330 adopts a plurality of protruding tooth, and a plurality of protruding tooth equidistant arrangement.

Specifically, the front end of the first expansion clamp rod 110 is provided with the front stop block 320, the front part of the first expansion clamp rod 110 is provided with the rear stop block 310, the front part of the second expansion clamp rod 120 is provided with the rear stop block 310, medical staff can insert the front ends of the first expansion clamp rod 110 and the second expansion clamp rod 120 into the osteotomy gap when using the corner cervical vertebra plate 400 expansion device, at this time, the front stop block 320 and the rear stop block 310 on the first expansion clamp rod 110 can be clamped on the vertebral plate 400, the rear stop block 310 on the second expansion clamp rod 120 can be propped on the vertebral plate 400, and meanwhile, the stability of the vertebral plate 400 and the first expansion clamp rod 110 and the second expansion clamp rod 120 can be improved by matching with the friction surface 330, so that the slipping phenomenon during expansion is avoided.

In addition, by providing the rear stopper 310, the depth of penetration of both the first and second expansion clamp bars 110 and 120 into the cervical vertebrae can be restricted, and compression of the spinal cord or the like by both the first and second expansion clamp bars 110 and 120 can be prevented.

It should be noted that, the front stop 320 is disposed on the first expanding jaw 110, and can cooperate with the rear stop 310 to further improve the connection stability between the first expanding jaw 110 and the vertebral plate 400.

Referring to fig. 1 and 2, in an alternative embodiment of the present invention, an indication caliper 230 for indicating the distance by which the first spreader pin 110 and the second spreader pin 120 are spread is provided on the second jaw 220.

The indicating caliper 230 is provided with a blocking block 231 for limiting the maximum spreading distance between the first spreading clamp rod 110 and the second spreading clamp rod 120, and the blocking block 231 can be abutted to the first clamp handle 210.

Specifically, an indication caliper 230 for indicating the spreading distance of the first spreading clamp rod 110 and the second spreading clamp rod 120 is provided on the second clamp handle 220, and medical staff can conveniently know the spreading distance of the first spreading clamp rod 110 and the second spreading clamp rod 120 through the reading of the indication caliper 230. The outer edge of the first spreading clamp bar 110 is a reading starting point, that is, how much the indication caliper 230 protrudes out of the outer edge of the first spreading clamp bar 110 indicates how much the spreading distance between the first spreading clamp bar 110 and the second spreading clamp bar 120 is.

It should be noted that, a blocking block 231 for limiting the maximum spreading distance of the first spreading clamp bar 110 and the second spreading clamp bar 120 is provided on the indication caliper 230, for example, by providing the blocking block 231, the first spreading clamp bar 110 and the second spreading clamp bar 120 can be spread by 20mm at maximum. In addition, a person skilled in the art can set the position of the blocking piece 231 according to the actual requirement, so as to adjust the maximum spreading distance between the first spreading clamp bar 110 and the second spreading clamp bar 120.

In addition, the indication caliper 230 is provided with a ratchet, a clamping hole for connecting with the ratchet is formed in the first caliper handle 210, the diameter of the clamping hole is larger than the width of the indication caliper 230, when medical staff engages the first caliper handle 210 and the second caliper handle 220, the indication caliper 230 gradually extends out of the first caliper handle 210 from the clamping hole, and the ratchet on the indication caliper 230 can be clamped with the clamping hole, so that the indication caliper 230 is prevented from retracting, and the propped-open states of the first propped-open caliper lever 110 and the second propped-open caliper lever 120 are fixed; when the expanding distance between the first expanding clamp rod 110 and the second expanding clamp rod 120 needs to be reduced, the size of the clamping hole is set to be larger than the width of the indicating caliper 230, so that medical staff can manually pull the indicating caliper 230, a ratchet wheel on the indicating caliper 230 is far away from a clamping block in the clamping hole, and the expanding distance between the first expanding clamp rod 110 and the second expanding clamp rod 120 can be reduced.

In addition, a restoring spring 250 is provided on the first and second handles 210 and 220 so that the first and second handles 220 are restored, i.e., the distraction distance of both the first and second distraction jaws 110 and 120 is reduced.

Wherein, the tail parts of the first forceps handle 210 and the second forceps handle 220 are provided with rough surfaces 240 which are convenient for medical staff to hold. So as to improve the ability of medical personnel to better grip the first and second handles 210, 220 and facilitate force application.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced with equivalents; such modifications and substitutions do not depart from the spirit of the technical solutions according to the embodiments of the present invention.

Claims (10)

1. A parallel distractable cervical vertebra lamina distractor, comprising: a spreading clamp rod, a clamp handle and a parallel spreading piece (10);

the opening clamp rod comprises a first opening clamp rod (110) and a second opening clamp rod (120), the clamp handles comprise a first clamp handle (210) and a second clamp handle (220), a pivot seat (211) is arranged on the first clamp handle (210), and a pivot block (221) matched with the pivot seat (211) is arranged on the second clamp handle (220);

the parallel stretching piece (10) comprises two sliding seats (20) and at least two parallel driving rods (30), the stretching clamp rods are connected with the clamp handles through the sliding seats (20), one ends of the sliding seats (20) are fixedly connected with the stretching clamp rods, and the other ends of the sliding seats are pivoted with the clamp handles;

one end of the parallel driving rod (30) is pivoted at the pivot joint of the sliding seat (20) and the clamp handle, the other end of the parallel driving rod is slidably arranged in a chute (21) of the other sliding seat (20), and the middle parts of the two parallel driving rods (30) are pivoted with each other;

when the first clamp handle (210) and the second clamp handle (220) are close to each other, the first stretching clamp rod (110) and the second stretching clamp rod (120) are far away from each other.

2. The cervical vertebral plate spreader capable of being spread in parallel according to claim 1, wherein the parallel driving rod (30) is provided with a mounting hole, a connecting pin shaft is installed in the mounting hole, and the connecting pin shaft is arranged in the sliding groove (21) in a sliding manner.

3. The parallel distractable cervical vertebral plate distractor of claim 1 wherein a return spring is provided between the first jaw handle (210) and the second jaw handle (220).

4. The parallel distractable cervical vertebra lamina distractor of any of claims 1-3, further comprising an anti-slip assembly (300);

the anti-drop assembly (300) is disposed at the front ends of both the first and second spreader bars (110, 120).

5. The parallel distractable cervical vertebra lamina distractor of claim 4, wherein the anti-drop assembly (300) includes a back stop (310) and a front stop (320);

the first stretching clamp rod (110) and the second stretching clamp rod (120) are respectively provided with a rear stop block (310), and the front end of the first stretching clamp rod (110) is provided with a front stop block (320).

6. The parallel distractable cervical vertebra lamina distractor of claim 5, wherein a friction surface (330) is provided between the front stop (320) and the rear stop (310) on the first distracting clamp bar (110);

a friction surface (330) is arranged between the front end of the second stretching clamp rod (120) and the rear stop block (310).

7. The parallel distractable cervical vertebra lamina distractor of claim 6 wherein the friction surface (330) employs a plurality of teeth, the plurality of teeth being equally spaced.

8. A parallel distractable cervical vertebral plate distractor according to any of the claims 1-3, characterized in that the second jaw (220) is provided with an indicating calliper (230) for indicating the distance of distraction of the first (110) and the second (120) distracting jaws.

9. The parallel distractable cervical vertebral plate distractor according to claim 8, wherein the indicating callipers (230) are provided with a blocking block (231) for limiting the maximum distraction distance of the first and second distraction jaws (110, 120), the blocking block (231) being capable of abutting the first jaw (210).

10. The parallel distractable cervical vertebral plate distractor of claim 9 wherein said indication caliper (230) is provided with ratchet teeth and said first jaw handle (210) is provided with a snap hole for connection to said ratchet teeth, said snap hole having a diameter greater than a width of said indication caliper (230).