CN108201453B

CN108201453B - Multidirectional retractor for spinal surgery

Info

Publication number: CN108201453B
Application number: CN201611184913.9A
Authority: CN
Inventors: 李兵; 彭小忠; 卓祥龙
Original assignee: Shanghai Sanyou Medical Co ltd
Current assignee: Shanghai Sanyou Medical Co ltd
Priority date: 2016-12-20
Filing date: 2016-12-20
Publication date: 2024-03-22
Anticipated expiration: 2036-12-20
Also published as: CN108201453A

Abstract

The invention provides a multidirectional retractor device for spinal surgery, comprising a fixed ring and a plurality of retractor assemblies; the retraction assembly comprises a retraction plate, a cone stabilization needle and a connector, wherein the retraction plate is long-strip-shaped and is provided with a limiting hole penetrating through the retraction plate along the length direction, the cone stabilization needle comprises a threaded head at the front end and a clamping block at the rear end, the cone stabilization needle is penetrated in the limiting hole, the clamping block is clamped on the retraction plate, and the threaded head penetrates out of the limiting hole; the connector is connected with the fixed ring in a matched mode, and the retracting plate is connected with the connector through a pull rod. The invention does not need to be fixedly connected with the operating table bedstead when in use, and can finely adjust the position and the posture of the retractor plate when in use, thereby bringing great convenience to operation.

Description

Multidirectional retractor for spinal surgery

Technical Field

The invention relates to medical equipment, in particular to a multidirectional retractor device for spinal surgery.

Background

In surgical procedures, the surgical exposure step is typically accomplished using a retractor or retractor device. So-called surgical exposure, the basic process is: the skin on the surface of the human body is cut, and the human body tissue under the incision is pulled by a drag hook or a retracting device at the incision, so that the focus part in the human body is in an ideal exposure state.

Conventional forms of multidirectional retractor have some drawbacks in use: for example, the connection devices of the retractor plate with the pull rod and the fixed ring are not universally adjustable, which causes inconvenience in adjusting the posture of the retractor plate, and if the posture of the retractor plate cannot be adjusted to the ideal position and posture, certain operations can not be completed; after the retractor plate with the pull rod is connected with the fixed ring, the fixed ring is also connected with the operating table bedstead, so that the retractor plate can be kept in a fixed state, and the steps in the operation process are more.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a multidirectional retractor for spinal surgery, which is not connected with an operating table bedstead, so as to overcome the defects in the prior art.

In order to solve the technical problems, the invention adopts the following technical scheme: a multi-directional retractor device for spinal surgery comprising a fixation ring and a plurality of retractor assemblies; the retraction assembly comprises a retraction plate, a cone stabilization needle and a connector, wherein the retraction plate is long-strip-shaped and is provided with a limiting hole penetrating through the retraction plate along the length direction, the cone stabilization needle comprises a threaded head at the front end and a clamping block at the rear end, the cone stabilization needle is penetrated in the limiting hole, the clamping block is clamped on the retraction plate, and the threaded head penetrates out of the limiting hole; the connector is connected with the fixed ring in a matched mode, and the retracting plate is connected with the connector through a pull rod.

Preferably, a C-shaped clamp is arranged on the connector, and the C-shaped clamp clamps the pull rod.

Further, the connector further comprises a base, a column sleeve and a pressing cap, wherein a vertical upright column is arranged on the top surface of the base, a plurality of holding parts are arranged on the upper portion of the column sleeve in a circumferential direction, vertical through holes are formed in the C-shaped clamp holder, a clamping groove used for clamping a pull rod is formed in the opening of the C-shaped clamp holder, the pressing cap is provided with a threaded through hole, the column sleeve is sleeved on the upright column, the C-shaped clamp holder is sleeved on the column sleeve through the through hole and is pressed against the holding parts, the pressing cap is in threaded fit with the column sleeve and is pressed against the C-shaped clamp holder, and the fixing ring penetrates through the base and the connector.

Further, the bottom surface of the C-shaped clamp holder is a first concave cambered surface, and the enclasping parts are arc-shaped matched with the first cambered surface.

Further, the top surface of the C-shaped clamp holder is a convex second cambered surface, the bottom surface of the compression cap is a concave third cambered surface, and the shape of the second cambered surface is matched with that of the third cambered surface.

Further, a through groove is formed in the bottom surface of the base, a clamping hook is arranged at the edge of the through groove, and the fixing ring is arranged in the through groove in a penetrating mode.

Further, the bottom surface of the upright post is provided with a blind hole along the axial direction, a spring is arranged in the blind hole, the lower end of the spring is pressed on a ball, the base is provided with a through hole at the opposite position of the blind hole, and the ball can be pressed on the fixing ring through the through hole.

Preferably, the device further comprises a push plate device, wherein a ball head is arranged at the end part of the push plate device, an interface is arranged on the retractor plate, and the ball head is matched with the interface.

Preferably, a bending part for clamping is arranged at one end of the retractor plate, which is contacted with the vertebral body.

Preferably, the fixing ring is provided with an opening for penetrating the connector.

As described above, the multidirectional retractor for spinal surgery of the present invention has the following advantageous effects:

1. when the invention is used, the vertebral body stabilizing needle and the vertebral body are kept in a fixedly connected relation, and the retractor plate and the vertebral body stabilizing needle are kept in a fixedly connected relation, so that the whole device does not need to be fixedly connected with the operating table bed frame, and the structure is simpler and the operation is more convenient.

2. The connector comprises the C-shaped clamp holder, the base, the column sleeve and the compression cap, and can be used for conveniently fine-adjusting the position and the posture of the retractor plate in use through the mutual matching relationship, so that great convenience is brought to operation.

3. The invention is also provided with the push plate device, and through the cooperation of the push plate device and the pull rod, an operator can apply external force from two directions to carry out the retracting operation, so that the inconvenience is not easy to use due to insufficient strength of the operator.

Drawings

FIG. 1 is a schematic view of a retractor plate and a retractor rod of the present invention.

Figure 2 is a schematic cross-sectional view of a retractor plate and vertebral stabilization needle of the present invention.

Fig. 3 is a front view of the connector of the present invention.

Fig. 4 is a split cross-sectional view of a connector according to the present invention.

Fig. 5 is a perspective view of a connector according to the present invention.

Fig. 6 is a view showing a state in which the connector of the present invention is used.

Fig. 7 is a schematic view of the usage state of the present invention.

Fig. 8 is an enlarged view at a in fig. 7.

In the figure:

1. retractor plate 2 centrum stabilization needle

3. Connector 4 fixing ring

5. Pull rod 6 push plate device

11. Limiting hole 12 interface

13. 21 thread head of bending part

22. Clamping block 31 base

32. Column sleeve 33C-shaped clamp holder

34. Upright post of compression cap 311

312. Through groove 313 hook

314. Spring 315 ball

321. Through hole of holding part 331

332. First cambered surface of clamping groove 333

334. Second cambered surface 341 third cambered surface

41. Opening 61 ball head

Detailed Description

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present invention, and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the terms of modification, variation of proportions, or adjustment of sizes, without affecting the efficacy or achievement of the present invention, should be construed as falling within the scope of the present invention. Also, the terms such as "upper", "lower", "front", "rear", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.

As shown in fig. 1-8, a multi-directional retractor device for spinal surgery of the present invention includes a fixation ring 4 and a plurality of retractor assemblies including a retractor plate 1, a vertebral body stabilization needle 2, and a connector 3.

Referring to fig. 1, 2, 7 and 8, the retractor plate 1 is elongated and has a limiting hole 11 penetrating the retractor plate 1 along the length direction. The cone stabilizing needle 2 comprises a threaded head 21 at the front end and a clamping block 22 at the rear end, the cone stabilizing needle 2 is arranged in the limiting hole 11 in a penetrating mode, the clamping block 22 is clamped on the retracting plate 1, and the threaded head 21 penetrates out of the limiting hole 11 to be connected with a cone. The end of the retractor plate 1 contacted with the vertebral body is provided with a bending part 13 for limiting human tissues. When in use, the cone stabilizing needle 2 is screwed into the cone through the tool, so that the cross section of the clamping block 22 is hexagonal for being conveniently matched with the tool, and the cone stabilizing needle 2 can be screwed into the cone by using an inner hexagonal wrench. As shown in fig. 3-7, the connector 3 is connected with the fixing ring 4 in a matching way, and the retracting plate 1 is connected with the connector 3 through a pull rod 5.

When in use, the pull rod 5 is externally connected with an operation handle to adjust the retraction position of the retraction plate 1, which is applied with external force in one direction, and the operation is inconvenient if the external force is insufficient, so as to be shown in fig. 7, the invention further comprises a push plate device 6, and in combination with fig. 1, 7 and 8, the end part of the push plate device 6 is provided with a ball head 61, the retraction plate 1 is provided with an interface 12, and the ball head 61 of the push plate device 6 is matched with the interface 12 of the retraction plate 1. Referring to fig. 7, in use, the pull rod 5 is located at one side of the retractor plate 1, and the pusher 6 is located at the other side, so that external force can be applied to the retractor plate 1 from two directions, thereby bringing convenience to operation. Specifically, in this embodiment, the interface 12 is a through slot formed in the retractor plate 1, one end of the slot is provided with a process hole capable of allowing the ball head 61 to penetrate, and the diameter of the ball head 61 is larger than the width of the slot, so that the ball head 61 can slide along the slot to a position that is not separated when entering the slot through the process hole.

In this embodiment, the connector 3 is provided with a C-shaped holder 33, and the C-shaped holder 33 holds the pull rod 5. Further, referring to fig. 3-7, the connector 3 further includes a base 31, a post sleeve 32, and a compression cap 34, a vertical upright post 311 is disposed on a top surface of the base 31, an external thread is disposed on an upper portion of the post sleeve 32, a plurality of clasping portions 321 are disposed on a lower portion of the post sleeve along a circumferential direction, a vertical through hole 331 is formed in the C-shaped clamp 33, a clamping groove 332 for clamping the pull rod 5 is disposed in an opening portion of the C-shaped clamp 33, and as shown in fig. 3, upper and lower surfaces of the opening portion of the C-shaped clamp 33 are respectively recessed inwards to jointly form the clamping groove 332. The compression cap 34 is threaded through-holes. Referring to fig. 4 and 6, the post 32 is sleeved on the post 311, the C-shaped holder 33 is sleeved on the post 32 through the through hole 331 and can be pressed against the clasping portion 321, and the pressing cap 34 is in threaded engagement with the post 32 and presses against the C-shaped holder 33. When the tightening cap 34 is screwed, it exerts a downward pressure on the C-shaped holder 33, which pressure is transmitted to each of the clasping portions 321, and the clasping portions 321 are of deformable material, so that they can exert a clasping action on the upright 311 from a plurality of directions, the position of the C-shaped holder 33 on the upright 311 being determined by the action of friction. The fixing ring 4 in this embodiment is connected to the connector 3 through the base 31.

Referring to fig. 4, the bottom surface of the C-shaped holder 33 is a first concave arc surface 333, and the clasping portion 321 is in a circular arc shape adapted to the first arc surface 333, that is, a close fit is achieved; all the enclasping portions 321 form a hemispherical structure in the circumferential direction, the first cambered surface 333 of the C-shaped clamp 33 is attached to all the enclasping portions 321, when the pressing cap 34 is pressed down, the component force of the pressure in the diameter direction of the column sleeve 32 can be increased through the cambered surface contact structure, and along with the increase of the pressure, the enclasping portions 321 shrink inwards and enclasp on the upright column 311, so that the effective enclasping of the column sleeve 32 on the upright column 311 is realized. In addition, the top surface of the C-shaped holder 33 is a convex second cambered surface 334, the bottom surface of the pressing cap 34 is a concave third cambered surface 341, and the second cambered surface 334 of the C-shaped holder 33 is matched with the third cambered surface 341 of the pressing cap 34, so as to achieve the purpose of close fitting. The top surface and the bottom surface of the C-shaped clamp 33 are arc-shaped, and the C-shaped clamp can rotate a certain angle between the pressing cap 34 and the clasping part 321, so that the position of the pull rod 5 can be finely adjusted. Referring to fig. 6, the pressing cap 34 is to be used in combination with a wrench, and the pressing cap 34 is pressed by the wrench to move the pressing cap 34 downward in the axial direction of the column jacket 32, thereby allowing the pressing cap 34 to press the C-shaped holder 33. Meanwhile, since the C-shaped holder 33 is clamped between the pressing cap 34 and the clasping portion 321, the opening portion of the C-shaped holder 33 tends to shrink, thereby clamping the tie rod 5. According to the invention, through the structure, before the pull rod 5 is clamped, the column sleeve 32 can be movably adjusted in height along the axial direction of the upright post 311, the angle between the C-shaped clamp holder 33 and the column sleeve 32 can be adjusted through the spherical surface, and the pull rod 5 can also be movably adjusted along the clamping groove 332 to adjust the working position of the retractor plate 1, so that the universal adjustment is realized, and the use flexibility is greatly improved.

In this embodiment, as shown in fig. 5 and 6, a through groove 312 is formed in the bottom surface of the base 31, a hook 313 is disposed at an edge of the through groove 312, and the fixing ring 4 is inserted into the through groove 312 and is limited by the hook 313. Further, as shown in fig. 4, a blind hole is formed in the bottom surface of the upright post 311 along the axial direction, a spring 314 is disposed in the blind hole, the lower end of the spring 314 presses against a ball 315, a through hole is formed in the opposite position of the blind hole on the base 31, and when the fixing ring 4 is inserted into the through groove 312, referring to fig. 6, the ball 315 can be pressed against the fixing ring 4 through the through hole, so that resistance is generated by the relative movement between the connector 3 and the fixing ring 4, and random sliding of the connector 3 on the fixing ring 4 is avoided.

In this embodiment, as shown in fig. 7, the fixing ring 4 is provided with an opening 41 for passing through the connector 3 in order to facilitate the installation of the connector 3.

As can be seen from fig. 7, in this embodiment, the front end of the pull rod 5 is connected with the retractor plate 1, and the rear end is a screw rod, and the screw rod is in threaded connection with the operating handle, so that an operator can apply external force conveniently.

In the operation, with reference to fig. 1-8, three traction assemblies are used in this embodiment, and the method of using the present invention is as follows:

1) The pull rod 5 is in threaded connection with the operating handle, and then human tissues are pulled; the matched pusher 6 is pulled if necessary.

2) After the retractor plate 1 is pulled to a designated position, the cone stabilizing needles 2 are respectively inserted into the limiting holes 11 of the retractor plate 1, the cone stabilizing needles 2 are screwed into the cones through the thread heads 21 of the cone stabilizing needles 2 by a spanner until the clamping blocks 22 of the cone stabilizing needles 2 are pressed on the retractor plate 1, and then the fixation of the retractor plate 1 and the cones is achieved.

3) After the retractor plate 1 of each retractor assembly is installed, the connector 3 is installed on the fixing ring 4 through the through groove 312, at this time, the compression cap 34 on the connector 3 is in a non-screwed state, and the post sleeve 32 can move along the upright post 311. Thereafter, each tie rod 5 is placed into the clamping groove 332 of the corresponding C-shaped clamp 33, that is, as shown in fig. 6, after the positions of the three tie rods 5 are primarily determined, the tightening cap 34 is tightened by using a wrench, and during the tightening process, an operator manually adjusts the position of the column sleeve 32 and the position of the C-shaped clamp 33, and finally, the column sleeve 32 is tightly clamped to the upright post 311, and meanwhile, the tie rods 5 are stably clamped, so that the fixation is realized. The positions of the three retraction assemblies on the fixation ring 4 are determined and the positions of each other are limited by the fixation ring 4 so that the positions do not change.

4) Finally, the operating handle on the pull rod 5 is removed, so that the operating space is vacated, and related operation is performed.

In the invention, after the step 3) is completed, the vertebral body stabilizing needle 2 and the vertebral body are kept in a fixedly connected relation, the retractor plate 1 and the vertebral body stabilizing needle 2 are kept in a fixedly connected relation, and the relative position between the retractor plate 1 is also determined through the fixing ring 4, so that the whole device forms a stable assembly body, and the whole device is not required to be fixedly connected with an operating table bedstead, thereby improving the flexibility of use and bringing great convenience to operation.

In summary, the multi-directional retractor for spinal surgery of the present invention does not require a connection to the frame of the operating table during use and facilitates adjustment of the position of the retractor plate during use. Therefore, the invention effectively overcomes some practical problems in the prior art, thereby having high utilization value and use significance.

The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. The present invention is capable of modifications in the foregoing embodiments, as obvious to those skilled in the art, without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.

Claims

1. A multidirectional retractor for spinal surgery, characterized by: comprising a fixed ring (4) and a plurality of retraction assemblies; the retraction assembly comprises a retraction plate (1), a cone stabilization needle (2) and a connector (3), wherein the retraction plate (1) is long-strip-shaped, a limiting hole (11) penetrating through the retraction plate (1) is formed in the length direction, the cone stabilization needle (2) comprises a threaded head (21) at the front end and a clamping block (22) at the rear end, the cone stabilization needle (2) is penetrated into the limiting hole (11), the clamping block (22) is clamped on the retraction plate (1), and the threaded head (21) penetrates out of the limiting hole (11); the connector (3) is connected with the fixed ring (4) in a matching way, and the retractor plate (1) is connected with the connector (3) through a pull rod (5); a C-shaped clamp holder (33) is arranged on the connector (3), and the C-shaped clamp holder (33) clamps the pull rod (5); the connector (3) further comprises a base (31), a column sleeve (32) and a compression cap (34), wherein a vertical upright column (311) is arranged on the top surface of the base (31), an external thread is arranged on the upper portion of the column sleeve (32), a plurality of holding parts (321) are arranged on the lower portion of the column sleeve along the circumferential direction, a vertical through hole (331) is formed in the C-shaped clamp holder (33), a clamping groove (332) for clamping the pull rod (5) is formed in the opening part of the C-shaped clamp holder (33), a threaded through hole is formed in the compression cap (34), the column sleeve (32) is sleeved on the upright column (311), the C-shaped clamp holder (33) is sleeved on the column sleeve (32) through the through hole (331) and pressed against the holding parts (321), the compression cap (34) is in threaded fit with the column sleeve (32) and is pressed against the C-shaped clamp holder (33), and the fixing ring (4) penetrates through the base (31) to be connected with the connector (3); a blind hole is formed in the bottom surface of the upright post (311) along the axial direction, a spring (314) is arranged in the blind hole, the lower end of the spring (314) is pressed on a ball (315), a through hole is formed in the base (31) at the opposite position of the blind hole, and the ball (315) can be pressed on the fixed ring (4) through the through hole; the multidirectional retractor device for spinal surgery further comprises a push plate device (6), a ball head (61) is arranged at the end part of the push plate device (6), an interface (12) is formed in the retractor plate (1), and the ball head (61) is matched with the interface (12).

2. A multi-directional retractor device for spinal surgery according to claim 1, wherein: the bottom surface of C shape holder (33) is concave first cambered surface (333), hold tightly portion (321) all be with first cambered surface (333) looks adaptation convex.

3. A multi-directional retractor device for spinal surgery according to claim 1, wherein: the top surface of C shape holder (33) is convex second cambered surface (334), the bottom surface of compressing tightly cap (34) is concave third cambered surface (341), second cambered surface (334) with the shape looks adaptation of third cambered surface (341).

4. A multi-directional retractor device for spinal surgery according to claim 3, wherein: the bottom surface of base (31) is opened has logical groove (312), the edge of logical groove (312) is equipped with trip (313), fixed ring (4) wear to establish in logical groove (312).

5. A multi-directional retractor device for spinal surgery according to claim 1, wherein: one end of the retractor plate (1) contacted with the vertebral body is provided with a bending part (13) for clamping.

6. A multi-directional retractor device for spinal surgery according to claim 1, wherein: the fixing ring (4) is provided with an opening (41) for penetrating the connector (3).