Occipital bone axis distraction measuring device

Abstract

The utility model relates to the technical field of medical instruments, and provides an occipital bone axis distraction measuring device which comprises a first distraction frame, the first distraction frame comprises a rectangular cylinder, a threaded hole, a bolt, an L-shaped rod, a forceps holder block and an anchoring module, a second distraction frame is arranged on one side of the first distraction frame, and the second distraction frame and the first distraction frame are the same in structure. One end of the first opening frame is fixedly connected with a first adjusting frame, and one end of the second opening frame is fixedly connected with a second adjusting frame. When a joint gap of a patient is opened, the anchoring module is arranged at the joint gap of the patient, the occipital bone of the patient can be fully anchored and the axis spinous process can be clamped through the opening frames, meanwhile, the ends of the two opening frames are arranged to be in an L shape, the advantage that the operation view is not shielded is achieved, the contact area of the head ends of the two opening frames and the bone substance is large, and the operation is convenient. Surface pressure can be dispersed to the whole contact surface, and sclerotin damage caused by pressure concentration is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an occipital axis distraction measuring device. Background Art

[0002] Posterior cervical atlantoaxial lateral arthrodesis is a relatively mature surgical method. The most important surgical step is to implant artificial bone or fusion device in the joint space of the lateral atlantoaxial joint. However, the normal joint space is narrow and it is difficult to implant the fusion device. Therefore, a device specially designed for this operation is needed to solve this problem. At present, there is no expander for expanding the joint space of the atlantoaxial joint. The expanders currently used are usually simple expander clamps, which have the disadvantages of blocking the surgical field, easy to loosen, and not precise enough in adjustment.

[0003] Therefore, there is a need for an occipital-axial distraction measuring device that can stably and accurately distract the joint space of the atlantoaxial joint. Utility Model Content

[0004] In order to solve the above problems, the utility model proposes an occipital axis distraction measuring device, which has the characteristics of convenient operation and good distraction effect.

[0005] In order to achieve the above purpose, the utility model proposes the following specific solutions:

[0006] A device for measuring occipital axis distraction, comprising a first distraction frame, the first distraction frame comprising a rectangular tube, a threaded hole, a bolt, an L-shaped rod, a clamping block and an anchoring module, the inner side of the rectangular tube is movably connected with an L-shaped rod, a threaded hole is provided on the side wall of one end of the rectangular tube, a bolt is threadedly connected on the inner side of the threaded hole, one end of the L-shaped rod is fixedly connected with a clamping block, an anchoring module is fixedly provided on the side wall of the clamping block, a second distraction frame is provided on one side of the first distraction frame, the second distraction frame and the first distraction frame have the same structure, one end of the first distraction frame is fixedly connected with a first adjustment frame, and one end of the second distraction frame is fixedly connected with a A second adjusting frame is provided, the first adjusting frame includes a first connecting plate, a guide rod and an adjusting rod, one end of the first connecting plate is fixedly connected to the rectangular tube, the other end of the first connecting plate is fixedly connected to the guide rod, an adjusting rod is fixedly provided on the side wall of the first connecting plate, a scale is provided on the top surface of the adjusting rod, the second adjusting frame includes a second connecting plate, a connecting frame and an adjusting mechanism, one end of the second connecting plate is fixedly connected to the second support frame, one end of the adjusting rod passes through the second connecting plate, a connecting frame is fixedly provided on the side wall of the second connecting plate, the connecting frame is sleeved on the outside of the guide rod, and an adjusting mechanism is provided on the connecting frame.

[0007] As an optimal technical solution of an occipital axis distraction measuring device of the utility model, the adjusting mechanism includes a gear rack, the gear rack includes a rotating shaft, the rotating shaft passes through a connecting frame, a limit plate is fixedly provided at the bottom of the rotating shaft, a first gear is fixedly provided on the rotating shaft, the first gear is located on the inner side of the connecting frame, a latch tooth is fixedly provided on the side wall of the adjusting rod, the first gear is meshed with the latch tooth, and a rotating plate is fixedly provided on the top of the rotating shaft.

[0008] As an optimal technical solution of an occipital axis distraction measuring device of the utility model, the adjusting mechanism includes a locking frame, a second gear is provided on the inner side of the locking frame, the second gear is fixed to the upper end of the rotating shaft, a locking assembly is provided on the inner side of the locking frame, the locking assembly includes a spring sheet, the spring sheet is symmetrically fixed on the inner wall of the locking frame, a clamping plate is fixed at one end of the spring sheet, one end of the clamping plate is clamped on the second gear, a conical top block is provided on one side of the clamping plate, a rotating rod is fixed on the top of the conical top block, and one end of the rotating rod passes through the top of the locking frame.

[0009] As an optimal technical solution of the occipital axis distraction measuring device of the utility model, a connecting frame is fixedly provided on the side wall of the rectangular tube, and the connecting frame includes a connecting rod, a sleeve is sleeved on the outer side of one end of the connecting rod, one end of the sleeve is fixed to the side wall of the second distraction frame, a spring is fixed on the inner side of the sleeve, and one end of the connecting rod is fixedly connected to the spring.

[0010] As a preferred technical solution of the occipital axis distraction measuring device of the utility model, a connecting groove is provided on the guide rod, and the connecting frame is engaged with the inner side of the connecting groove.

[0011] As a preferred technical solution of the occipital axis distraction measuring device of the utility model, a movable opening is opened on the side wall of the second connecting plate, one end of the adjusting rod passes through the movable opening, and a first baffle is fixedly provided on one end of the adjusting rod.

[0012] As an optimal technical solution for an occipital axis distraction measuring device of the utility model, a second baffle is fixedly provided at one end of the connecting frame, the second baffle is located on one side of the guide rod, a first through hole is opened in the middle of the connecting frame, the first through hole passes through the locking frame, and the rotating shaft is located on the inner side of the first through hole.

[0013] As a preferred technical solution of the occipital axis distraction measuring device of the utility model, a second through hole is opened on the top surface of the locking frame, and the upper end of the rotating rod passes through the second through hole.

[0014] Compared with the existing technology, the utility model has the following beneficial effects:

[0015] The utility model provides a first expansion frame and a second expansion frame, and the ends of the expansion frames are provided with clamping blocks and anchoring modules. When the joint gap of the patient is expanded, the anchoring module is placed at the joint gap of the patient, and the expansion frame can fully anchor the occipital bone of the patient and clamp the spinous process of the axis vertebra. At the same time, the ends of the two expansion frames are arranged in an L shape, which has the advantage of not blocking the surgical field of view, and the contact area of ​​the parts where the head ends of the two expansion frames contact the bone is large, which can disperse the surface pressure to the entire contact surface, and avoid the pressure concentration on one point to damage the bone.

[0016] And by arranging a rectangular tube on the spreading frame, the L-shaped rod at the end can move inside the rectangular tube, and the length can be adjusted to adapt to the anatomical differences between different individuals. At the same time, a first adjustment frame and a second adjustment frame are arranged on the other side of the two spreading frames. An adjustment rod with a locking tooth is arranged on the first adjustment frame, and an adjustment mechanism is arranged on the second adjustment frame. By rotating the first gear of the adjustment mechanism, the first gear can be engaged with the adjustment rod, so that the adjustment rod can be driven to move, so that the spacing of the spreading frames can be fine-tuned. At the same time, a scale is arranged on the adjustment rod, which can accurately control the fine-tuning distance and clearly display the spread height.

[0017] In addition, a locking frame is provided on the second adjusting frame, and a locking assembly is provided inside the locking frame. Two clamping plates of the locking assembly are clamped on the second gear to limit the second gear. The second gear and the first gear are both fixed on the rotating shaft to limit the first gear. A conical top block connected by a rotating rod is provided in the middle of the clamping plate. The operator can drive the conical top block to rotate by the rotating rod so that the conical top block can push one side of the clamping plate to disengage from the clamping with the second gear, so that the second gear can only rotate in one direction, and the first gear can only rotate in one direction, thereby ensuring the one-way rotation of the gear, avoiding the situation where the gear rotation during the operation affects the operation, and the operation is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to better describe the technical solution of the utility model in detail, the present invention is further explained below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure provided by the utility model;

[0020] Figure 2 This is a schematic diagram of the connection between the first open frame and the second open frame of the utility model;

[0021] Figure 3 This is a schematic diagram of the connection between the first adjustment frame and the second adjustment frame of the utility model;

[0022] Figure 4 It is a three-dimensional schematic diagram of a first adjustment frame of the utility model;

[0023] Figure 5 It is a three-dimensional schematic diagram of the second adjustment frame of the utility model;

[0024] Figure 6 It is a three-dimensional cross-sectional view of the second adjustment frame of the utility model;

[0025] Figure 7 It is a partial cross-sectional view of the second adjustment frame of the utility model;

[0026] Figure 8 For the utility model Figure 7 A magnified schematic diagram of center A.

[0027] In the figure: 1, first open frame; 11, rectangular tube; 12, threaded hole; 13, bolt; 14, L-shaped rod; 15, clamp block; 16, anchor module; 2, connecting frame; 21, connecting rod; 22, sleeve; 23, spring; 3, second open frame; 4, first adjustment frame; 41, first connecting plate; 42, guide rod; 421, connecting groove; 43, adjustment rod; 431, scale; 432, latching tooth; 433, first baffle; 5, second adjustment frame; 51, first Two connecting plates; 511, moving port; 52, connecting frame; 521, second baffle; 522, first through hole; 53, adjusting mechanism; 531, locking frame; 5311, second through hole; 532, locking assembly; 5321, rotating rod; 5322, conical top block; 5323, spring sheet; 5324, clamping plate; 533, gear rack; 5331, rotating shaft; 5332, limiting plate; 5333, first gear; 5334, second gear; 5335, rotating plate. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] Example

[0030] See also Figure 1-8As shown, the utility model provides the following technical solutions: an occipital axis distraction measuring device, comprising a first distraction frame 1, the first distraction frame 1 comprising a rectangular tube 11, a threaded hole 12, a bolt 13, an L-shaped rod 14, a clamping block 15 and an anchoring module 16, an L-shaped rod 14 is movably inserted on the inner side of the rectangular tube 11, and the L-shaped structure does not block the surgical field of view, a threaded hole 12 is provided on one end side wall of the rectangular tube 11, a bolt 13 is threadedly connected on the inner side of the threaded hole 12, and the L-shaped rod 14 can be fixed on the position of the inner side of the rectangular tube 11 by screwing the bolt 13, one end of the L-shaped rod 14 is fixedly connected with a clamping block 15, and an anchoring module 16 is fixed on the side wall of the clamping block 15 for anchoring the patient's joint gap for distraction operation, a second distraction frame 3 is provided on one side of the first distraction frame 1, and the second distraction frame 3 has the same structure as the first distraction frame 1, and can refer to the attached Figure 1 and attached Figure 2 ; In this solution, two anchoring modules 16 are placed in the joint gap of the patient, and the two expansion frames are adjusted to enable the anchoring modules 16 to expand the joint gap of the patient. The L-shaped rod 14 is set to avoid blocking the surgical field of view, and the L-shaped rod 14 can be moved and adjusted on the inner side of the rectangular tube 11, which is convenient for adjustment according to the body shape of different patients and easy to operate.

[0031] Reference Figure 1 and Figure 2 As shown, specifically, a connecting frame 2 is fixedly provided on the side wall of the rectangular tube 11, and the connecting frame 2 includes a connecting rod 21, and a sleeve 22 is sleeved on the outer side of one end of the connecting rod 21, and one end of the sleeve 22 is fixed on the side wall of the second open frame 3, and a spring 23 is fixed on the inner side of the sleeve 22. The spring 23 is elastically connected so that the two open frames maintain a certain distance, and one end of the connecting rod 21 is fixedly connected to the spring 23; the connecting rod 21 can move on the inner side of the sleeve 22 as the distance between the two open frames is adjusted, so as to further stabilize the movement and adjustment of the open frames.

[0032] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, specifically, one end of the first support frame 1 is fixedly connected with a first adjustment frame 4, and one end of the second support frame 3 is fixedly connected with a second adjustment frame 5. The first adjustment frame 4 includes a first connecting plate 41, a guide rod 42 and an adjusting rod 43. One end of the first connecting plate 41 is fixedly connected to the rectangular tube 11, and the other end of the first connecting plate 41 is fixedly connected with the guide rod 42. An adjusting rod 43 is fixedly provided on the side wall of the first connecting plate 41, and a scale 431 is provided on the top surface of the adjusting rod 43, so that the surgical staff can conveniently observe the scale value. The second adjustment frame 5 includes a second connecting plate 51, a connecting frame 52 and an adjusting mechanism 53. One end of the second connecting plate 51 is fixedly connected to the first On the second support frame 3, one end of the adjustment rod 43 passes through the second connecting plate 51, and a connecting frame 52 is fixedly provided on the side wall of the second connecting plate 51. The connecting frame 52 is sleeved on the outer side of the guide rod 42, and the two adjustment frames are mutually engaged and limited. An adjustment mechanism 53 is provided on the connecting frame 52; a connecting groove 421 is provided on the guide rod 42, and the connecting frame 52 is engaged with the inner side of the connecting groove 421 for guiding and limiting; a moving opening 511 is provided on the side wall of the second connecting plate 51, and one end of the adjustment rod 43 passes through the moving opening 511, and a first baffle 433 is fixedly provided on one end of the adjustment rod 43 to prevent the adjustment rod 43 from being separated from the moving opening 511; the adjustment mechanism 53 includes a gear frame 53 3. The gear frame 533 includes a rotating shaft 5331, which passes through the connecting frame 52. A limiting plate 5332 is fixedly provided at the bottom of the rotating shaft 5331. A first gear 5333 is fixedly provided on the rotating shaft 5331. The first gear 5333 is located on the inner side of the connecting frame 52. A latching tooth 432 is fixedly provided on the side wall of the adjusting rod 43. The first gear 5333 is meshed with the latching tooth 432. The first gear 5333 rotates to drive the adjusting rod 43 to move, thereby adjusting the distance between the two support frames. A rotating plate 5335 is fixedly provided on the top of the rotating shaft 5331. Rotating the rotating plate 5335 can drive the first gear 5333 to rotate. A second gear 5333 is fixedly provided at one end of the connecting frame 52. The baffle plate 521 and the second baffle plate 521 are located on one side of the guide rod 42. A first through hole 522 is opened in the middle of the connecting frame 52. The first through hole 522 passes through the locking frame 531. The rotating shaft 5331 is located on the inner side of the first through hole 522. In this scheme, after the expansion frame is engaged with the patient's joint gap through the adjustment mechanism 53 set up, the surgeon can drive the first gear 5333 to rotate by rotating the rotating plate 5335, thereby driving the adjustment rod 43 to move on the inner side of the moving opening 511, and fine-tuning the spacing between the two expansion frames. At the same time, by observing the value on the scale 431, the surgeon can accurately control the expansion distance of the patient's joint gap, and the operation is accurate and the adjustment is convenient.

[0033] Reference Figure 3 , Figure 5 , Figure 7 and Figure 8As shown, specifically, the adjustment mechanism 53 includes a locking frame 531, a second gear 5334 is provided on the inner side of the locking frame 531, the second gear 5334 rotates synchronously with the first gear 5333, the second gear 5334 is fixed to the upper end of the rotating shaft 5331, a locking assembly 532 is provided on the inner side of the locking frame 531, and the locking assembly 532 includes a spring sheet 5323, the spring sheet 5323 is symmetrically fixed on the inner wall of the locking frame 531, a clamping plate 5324 is fixed on one end of the spring sheet 5323, one end of the clamping plate 5324 is clamped on the second gear 5334, the two clamping plates 5324 can limit the rotation direction of the second gear 5334, a conical top block 5322 is provided on one side of the clamping plate 5324, and a rotating rod 532 is fixed on the top of the conical top block 5322 1. One end of the rotating rod 5321 passes through the top of the locking frame 531, and the rotation of the rotating rod 5321 can drive the conical top block 5322 to push the clamping plate 5324; a second through hole 5311 is provided on the top surface of the locking frame 531, and the upper end of the rotating rod 5321 passes through the second through hole 5311; in this scheme, through the locking assembly 532 set, the conical top block 5322 pushes one side of the clamping plate 5324 to disengage from the second gear 5334, so that the second gear 5334 can rotate to one side, and similarly pushes the other side of the clamping plate 5324 to allow the second gear 5334 to rotate to the other side, thereby controlling the unidirectional rotation of the first gear 5333, achieving stable limiting of the spread frame, and avoiding the situation where the distance between the two spread frames changes during the operation and affects the surgical operation.

[0034] The working principle and use process of the utility model are as follows: when performing the joint space distraction operation of the occipital axis vertebra for the patient, the anchoring modules 16 on the two distraction frames are engaged to the appropriate position of the joint space, and the anchoring modules 16 are fixed to the L-shaped rod 14. The setting of the L-shaped rod 14 does not affect the surgical field of view. Then, by rotating the rotating rod 5321 on the locking frame 531, the conical top block 5322 can push the clamping plate 5324 of the locking assembly 532 open, so that it is disengaged from the clamping connection with the second gear 5334, so that the second gear 5334 can rotate. Then, the operator rotates the rotating plate 5335 of the adjusting mechanism 53 to make the first gear 5334 rotate. 5333 can rotate, and through its engagement with the adjusting rod 43, the adjusting rod 43 on the first adjusting frame 4 can move inside the moving opening 511 on the second adjusting frame 5, so as to adjust the distance between the two spread frames. The adjustment can be made while observing the scale 431, so that the surgeon can accurately control the distance between the two spread frames, thereby controlling the spread distance of the patient's joint gap, and the operation is convenient; when the anchoring module 16 is close to the patient's occipital plate during adjustment, the operator can loosen the bolt 13 according to individual differences, so that the L-shaped rod 14 can move inside the rectangular tube 11, thereby adjusting the extended length of the L-shaped rod 14, so that the selection of the anchoring point is more stable.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An occipital axis distraction measuring device, comprising a first distraction frame (1), characterized in that: The first support frame (1) comprises a rectangular tube (11), a threaded hole (12), a bolt (13), an L-shaped rod (14), a clamping block (15) and an anchoring module (16); an L-shaped rod (14) is movably inserted inside the rectangular tube (11); a threaded hole (12) is provided on one end of the side wall of the rectangular tube (11); a bolt (13) is threadedly connected inside the threaded hole (12); a clamping block (15) is fixedly connected to one end of the L-shaped rod (14); an anchoring module (16) is fixedly provided on the side wall of the clamping block (15); a second support frame (3) is provided on one side of the first support frame (1); the second support frame (3) and the first support frame (1) have the same structure; one end of the first support frame (1) is fixedly connected to a first adjustment frame (4); one end of the second support frame (3) is fixedly connected to a second adjustment frame (5); the first adjustment frame (4) comprises a first connecting plate (41), a guide rod (42) and an adjusting rod (43), one end of the first connecting plate (41) is fixedly connected to the rectangular tube (11), the other end of the first connecting plate (41) is fixedly connected to the guide rod (42), an adjusting rod (43) is fixedly provided on the side wall of the first connecting plate (41), a scale (431) is provided on the top surface of the adjusting rod (43), the second adjusting frame (5) comprises a second connecting plate (51), a connecting frame (52) and an adjusting mechanism (53), one end of the second connecting plate (51) is fixedly connected to the second support frame (3), one end of the adjusting rod (43) passes through the second connecting plate (51), a connecting frame (52) is fixedly provided on the side wall of the second connecting plate (51), the connecting frame (52) is sleeved on the outer side of the guide rod (42), and the connecting frame (52) is provided with an adjusting mechanism (53).

2. The occipital axis distraction measuring device according to claim 1, characterized in that: The adjusting mechanism (53) comprises a gear rack (533), the gear rack (533) comprises a rotating shaft (5331), the rotating shaft (5331) passes through the connecting frame (52), a limiting plate (5332) is fixedly provided at the bottom of the rotating shaft (5331), a first gear (5333) is fixedly provided on the rotating shaft (5331), the first gear (5333) is located on the inner side of the connecting frame (52), a latching tooth (432) is fixedly provided on the side wall of the adjusting rod (43), the first gear (5333) is meshed with the latching tooth (432), and a rotating plate (5335) is fixedly provided on the top of the rotating shaft (5331).

3. The occipital axis distraction measuring device according to claim 2, characterized in that: The adjusting mechanism (53) comprises a locking frame (531), a second gear (5334) is provided on the inner side of the locking frame (531), the second gear (5334) is fixed on the upper end of the rotating shaft (5331), a locking assembly (532) is provided on the inner side of the locking frame (531), the locking assembly (532) comprises a spring sheet (5323), the spring sheet (5323) is symmetrically fixed on the inner wall of the locking frame (531), a clamping plate (5324) is fixed on one end of the spring sheet (5323), one end of the clamping plate (5324) is clamped on the second gear (5334), a conical top block (5322) is provided on one side of the clamping plate (5324), a rotating rod (5321) is fixed on the top of the conical top block (5322), and one end of the rotating rod (5321) passes through the top of the locking frame (531).

4. The occipital axis distraction measuring device according to claim 3, characterized in that: A connecting frame (2) is fixedly provided on the side wall of the rectangular tube (11), and the connecting frame (2) comprises a connecting rod (21), a sleeve (22) is sleeved on the outside of one end of the connecting rod (21), one end of the sleeve (22) is fixed on the side wall of the second support frame (3), a spring (23) is fixedly provided on the inside of the sleeve (22), and one end of the connecting rod (21) is fixedly connected to the spring (23).

5. The occipital axis distraction measuring device according to claim 4, characterized in that: The guide rod (42) is provided with a connecting groove (421), and the connecting frame (52) is engaged inside the connecting groove (421).

6. The occipital axis distraction measuring device according to claim 5, characterized in that: A moving opening (511) is provided on the side wall of the second connecting plate (51), one end of the adjusting rod (43) passes through the moving opening (511), and a first baffle (433) is fixedly provided on one end of the adjusting rod (43).

7. The occipital axis distraction measuring device according to claim 6, characterized in that: A second baffle (521) is fixedly provided at one end of the connecting frame (52), the second baffle (521) is located on one side of the guide rod (42), a first through hole (522) is opened in the middle of the connecting frame (52), the first through hole (522) passes through the locking frame (531), and the rotating shaft (5331) is located on the inner side of the first through hole (522).

8. The occipital axis distraction measuring device according to claim 7, characterized in that: A second through hole (5311) is formed on the top surface of the locking frame (531), and the upper end of the rotating rod (5321) passes through the second through hole (5311).

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