CN219895838U - Adjustable trepan depth limiting device - Google Patents

Abstract

The utility model discloses an adjustable trepan depth limiting device, which comprises: the clamping device comprises a first encircling piece and a second encircling piece, wherein two end parts of the first encircling piece and the second encircling piece are detachably connected through a first connecting piece and a second connecting piece respectively and form a hollow encircling shape in the middle part, a through fixing pore canal is formed in the middle part of the second encircling piece, and a clamping device is arranged in the fixing pore canal; the clamping device comprises a clamping seat, a movable groove is formed in the middle of the clamping seat, a guide rod capable of horizontally sliding in the movable groove is arranged in the movable groove, one end of the guide rod penetrates through the movable groove and penetrates out of the clamping seat, a clamping piece is arranged at the end part of the guide rod extending out of the clamping seat, a limiting block is sleeved on the guide rod, an elastic piece is arranged between the limiting block and the clamping seat, the elastic piece is sleeved on the outer wall of the guide rod, and the other end of the guide rod is connected with a handle; the trephine can be fixed or adjusted by loosening or pulling the handle, so that the technical problem that the trephine is easy to deeply damage nerve tissues due to the fact that the depth of the trephine cannot be limited and adjusted is solved.

Description

Adjustable trepan depth limiting device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to an adjustable trepan depth limiting device.

Background

The prolapse of lumbar intervertebral disc is a clinically common degeneration and rupture of nucleus pulposus caused by various reasons, protrudes backwards, protrudes into a vertebral lamina, presses or stimulates adjacent tissues to cause a series of clinical symptoms such as lumbar pain, active nerve root pain and the like, and the patient with serious illness needs to cut off redundant intervertebral disc tissues by operation, lightens the pressing damage of nerve root and restores the nerve muscle function of the spinal column. Traditional open surgery is highly traumatic and has a high incidence of postoperative complications. With the continuous development of technology, minimally invasive spinal surgery represented by an intervertebral foramen mirror is widely applied to the treatment of lumbar disc herniation.

The intervertebral foramen mirror operation is to establish a working channel through a small incision in the lumbar intervertebral foramen area to reach the intervertebral disc protrusion part, the tissue and anatomical structure in the spine are transmitted to an external display by using the spinal endoscope, and a doctor operates by observing the display to take out the protruding intervertebral disc through the established channel, so that the aim of treatment is fulfilled.

During lumbar intervertebral foramen mirror operation, partial bone is removed through intervertebral foramen expansion forming, a safe and effective working channel is established, the intervertebral foramen mirror system can smoothly enter into the pathological changes of the intervertebral disc and the nerve compression part in the optimal angle and direction, and the operation modes of correspondingly cutting out and herniating or prolapse of nucleus pulposus tissues of the intervertebral disc, thickening yellow ligament, removing the bone hyperplasia, expanding vertebral canal and the like are carried out.

The trepan is generally adopted to remove part of bone so as to enlarge the intervertebral foramen, but important tissues such as nerve roots, dura mater and the like exist in the intervertebral foramen area and the deep part of the intervertebral foramen area, and when the trepan is used to remove the bone in the intervertebral foramen area, the trepan does not have a corresponding depth limiting device, so that the trepan further penetrates deep into the intervertebral foramen due to inertia when the trepan breaks the bone, and the inside of the vertebral canal is subjected to the risk of extrusion damage to the nerve tissues. Therefore, it is particularly important to provide a convenient and adjustable trepan depth limiting device.

Disclosure of Invention

The embodiment of the utility model provides an adjustable trepan depth limiting device which is used for solving the technical problem that the trepan depth cannot be limited and adjusted, so that the trepan is further deep under the action of inertia and is easy to damage nerve tissues.

In view of this, the present utility model provides an adjustable trepan depth limiting device comprising: the clamping device comprises a first encircling piece and a second encircling piece, wherein grooves are symmetrically formed in opposite faces of the first encircling piece and the second encircling piece, two ends of the first encircling piece and two ends of the second encircling piece are detachably connected through a first connecting piece and a second connecting piece respectively, a fixing pore canal is horizontally formed in the middle of the second encircling piece in a penetrating mode, and a clamping device is arranged in the fixing pore canal;

the clamping device comprises a clamping seat, a movable groove is formed in the middle of the clamping seat, a guide rod capable of horizontally sliding in the movable groove is arranged in the movable groove, the front end of the guide rod penetrates through the movable groove to extend into the groove, a clamping piece is arranged at the end of the guide rod, a limiting block is sleeved on the guide rod, an elastic piece is arranged between the limiting block and the rear wall of the clamping seat, the elastic piece is sleeved on the outer wall of the guide rod, and the rear end of the guide rod extends to the outer portion of the second encircling piece and is connected with a handle.

Optionally, the first connecting piece is the connection hinge, and the connection hinge is including setting up the first hinge connecting axle at a first surrounding part tip and setting up the second hinge connecting axle at a second surrounding part tip, all vertically seted up the through-hole on first hinge connecting axle and the second hinge connecting axle, dispose the pivot on the through-hole, and first hinge connecting axle is connected through pivot and second hinge connecting axle rotation.

Optionally, the other end radial extension of first surrounding piece and second surrounding piece is equipped with the surrounding connection piece respectively, has seted up first connecting duct and second connecting duct respectively on the surrounding connection piece correspondingly, places the second connecting piece on first connecting duct and the second connecting duct, and the second connecting piece is connecting screw.

Optionally, the clamping member is a magnetic attraction member.

Optionally, the elastic member is a spring.

Optionally, the clamping device further comprises a locking seat, and the locking seat is arranged at two ends of the clamping seat.

From the above technical solutions, the embodiment of the present utility model has the following advantages:

when the position of the circular saw needs to be adjusted, the handle is horizontally pulled in the direction away from the circular saw, the circular saw is separated from the circular saw on the guide rod, the circular saw is not fixed by the clamping device, the circular saw can be moved up and down to be adjusted to an ideal position at the moment, then the external force action on the handle is released, the limiting block is pushed to the front part of the movable groove under the reset action of the elastic piece, the guide rod is pushed to the inside of the groove, and the clamping piece clamps the circular saw, so that the circular saw clamp is fastened and fixed, and the circular saw clamp is convenient to use.

According to the adjustable trepan depth limiting device provided by the utility model, one end parts of the first encircling piece and the second encircling piece are detachably connected through the first hinge connecting shaft and the second hinge connecting shaft of the connecting hinge, and the other end parts of the first encircling piece and the second encircling piece are detachably connected through the first connecting pore passage, the second connecting pore passage and the connecting screw, so that the trepan depth limiting device is simpler to mount and detach, and meanwhile, the trepan depth limiting device can be detached according to the requirement in operation, thereby being beneficial to the selection of an operation mode.

According to the adjustable trepan depth limiting device, the first embracing piece and the second embracing piece are connected to form the embracing shape, the semicircular grooves formed in the opposite faces of the two embracing pieces are combined to form the circular hollow placement area, the trepan is placed in the hollow portion, after the trepan is adjusted to a proper position, the trepan is clamped and fixed from the side face through the functions of the guide rod, the limiting block and the clamping piece, the trepan is prevented from further penetrating deep into intervertebral foramen under the effect of inertia, the risk of damage to nerve tissues is reduced, the safety range of the trepan work can be adjusted according to operation needs, the depth can be adjusted conveniently and quickly at any time in actual operation, safe and rapid operation is facilitated, the flexibility is high, and the technical problems that the trepan depth cannot be limited and adjusted, and is easily damaged deep into the nerve tissues are solved.

Drawings

FIG. 1 is a schematic view of an adjustable trepan depth limiting device according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a first embracing member according to an embodiment of the present utility model;

fig. 3 is a schematic structural view of a second embracing member according to an embodiment of the present utility model;

FIG. 4 is a cross-sectional view of a clamping device provided in an embodiment of the present utility model;

fig. 5 is a schematic view illustrating a state in which the first embracing member and the second embracing member provided in the embodiment of the present utility model form an embracing shape.

Wherein, the reference numerals are as follows:

1. a first embracing member; 11. the first hinge connecting shaft; 12. a first connecting duct;

2. a second embracing member; 21. fixing the pore canal; 22. the second hinge connecting shaft; 23. a second connecting duct;

31. a clamping seat; 32. a movable groove; 33. a guide rod; 34. a limiting block; 35. a magnetic attraction piece; 36. a spring; 37. a locking seat; 38. a handle;

4. and (5) connecting screws.

Detailed Description

In order to make the present utility model better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present utility model, 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. In the description of the embodiments of the present utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in embodiments of the present utility model will be understood in detail by those of ordinary skill in the art.

For easy understanding, referring to fig. 1 to 3, an embodiment of an adjustable trepan depth limiting device according to the present utility model includes: the first encircling piece 1 and the second encircling piece 2 are cuboid with the height of 5mm, semi-cylindrical grooves with the diameter of 7.6mm are formed in opposite side surfaces, when the first encircling piece 1 and the second encircling piece 2 are combined together, the two grooves form a circular accommodating area, the ring saw can pass through the accommodating area from top to bottom and is surrounded by the first encircling piece 1 and the second encircling piece 2 from two sides, one end part of the first encircling piece 1 is provided with a first hinge connecting shaft 11, the middle part of the first hinge connecting shaft 11 is provided with a penetrating through hole, the other end part of the first encircling piece 1 is provided with an encircling connecting piece, and the middle part of the encircling connecting piece is provided with a first connecting pore 12 with internal threads in a penetrating way; one end part of the second encircling member 2 is provided with a second hinge connecting shaft 22, the middle part of the second hinge connecting shaft 22 is provided with a through hole which penetrates through, the other end part of the second encircling member 2 is provided with an encircling connecting sheet, and the middle part of the encircling connecting sheet is provided with a second connecting pore canal 23 with internal threads in a penetrating way;

the first hinge connecting shaft 11 of the first encircling member 1 can be just placed into a hollow groove in the middle of the second connecting shaft 22 of the second encircling member 2, so that the central through holes of the first hinge connecting shaft 11 and the second hinge connecting shaft 22 are positioned on the same axis, and then the first encircling member 1 and one end part of the second encircling member 2 are fixedly connected together by penetrating through the through holes through a rotating shaft and can mutually rotate under the action of the rotating shaft; the connecting hinge formed by the first hinge connecting shaft 11 and the second hinge connecting shaft 22 enables the encircling device formed by the first encircling piece 1 and the second encircling piece 2 to have an opening and closing function, the connecting hinge is convenient for assembling and disassembling the trepan depth limiting device when opened, and the connecting hinge enables the first encircling piece 1 and the second encircling piece 2 to be combined together, so that a complete cylindrical duct with the diameter of 7.6mm is formed inside.

The encircling connecting sheets of the first encircling member 1 and the second encircling member 2 can penetrate through the first connecting hole channel 12 and the second connecting hole channel 23 which penetrate through the connecting sheets through the connecting screws 4, wherein the tail ends of the connecting screws 4 are planes, the head ends of the connecting screws are hexagon socket nuts, the connecting screws 4 are matched with threads in the first connecting hole channel 12 and the second connecting hole channel 23 which penetrate through the connecting holes, so that the detachable connection of the first encircling member 1 and the second encircling member 2 is realized, and the encircling shape formed by the first encircling member 1 and the second encircling member 2 which are combined together is fixed and maintained;

referring to fig. 5, when the first encircling member 1 and the second encircling member 2 are fixedly connected with the second hinge connecting shaft 22 through the first hinge connecting shaft 11 and the encircling connecting piece is detachably connected with the connecting screw 4, the first encircling member 1 and the second encircling member 2 can form a closed encircling shape with a hollow middle part, wherein the hollow middle part is used for placing a trepan, and the trepan can move longitudinally, so that the trepan can conveniently enter the intervertebral foramen to remove part of bone and take out the trepan.

The middle part of the groove of the second encircling piece 2 is also provided with a fixing pore canal 21 in a penetrating way, the fixing pore canal 21 is used for placing a clamping device, when the trephine reaches a designated position in the intervertebral foramen, the trephine can be clamped and fixed by the clamping device, and the trephine is limited to further go deep;

referring to fig. 4, the clamping device includes a clamping seat 31, a guide rod 33, a magnetic attraction piece 35, a limiting block 34 and a handle 38, wherein a movable groove 32 is formed in the middle of the clamping seat 31, a guide rod 33 which can horizontally move in the movable groove 32 is arranged in the movable groove 32, the front end of the guide rod 33 penetrates through the movable groove 32 to penetrate out of the clamping seat 31 and extends into a groove, the front end of the guide rod 33 is provided with the magnetic attraction piece 35 for fixing the trepan, the guide rod 33 is sleeved with the limiting block 34, the limiting block 34 can only move in the movable groove 32, a spring 36 is arranged between the limiting block 34 and the clamping seat 31, the limiting block 34 limits the spring 36 to move in the movable groove 32, the spring 36 is sleeved on the outer wall of the guide rod 33, the rear end of the guide rod 33 extends to the outside of the second encircling piece 2, the handle 38 is connected to the rear end of the guide rod 33, the handle 38 is positioned on the outer side wall of the clamping seat 31, two ends of the spring 36 respectively abut against the side wall of the limiting block 34 and the side wall of the clamping seat 31, a spring 36 is arranged between one end of the clamping seat 31 and the guide rod 33, and the guide rod 33 is also provided with a locking seat 37 which can be in a L-shaped structure to prevent shaking of the movable seat 32;

when the ring saw needs to be fixed, the handle 38 is loosened, the handle 38 loses the action of external force, the spring 36 is reset to restore to the original state, meanwhile, under the action of the spring 36, the limiting block 34 can only move horizontally in the direction close to the ring saw in the movable groove 32, so that the guide rod 33 is driven to move horizontally in the direction close to the ring saw, the ring saw is sucked by the magnetic attraction piece 35 on the guide rod 33, and further the ring saw is clamped, and the ring saw is limited to be further deep.

When the position of the circular saw needs to be adjusted, the handle 38 is horizontally pulled in a direction away from the circular saw, the handle 38 drives the spring 36 and the guide rod 33 to horizontally move in a direction away from the circular saw, in the process, the spring 36 is compressed, meanwhile, the limiting block 34 limits the spring 36 to move only in the movable groove 32 until the magnetic attraction piece 35 on the guide rod 33 is separated from the circular saw, at the moment, the circular saw can be moved and adjusted to an ideal position, and then the handle 38 is loosened, so that the circular saw depth limiting device is fixed on the circular saw through the magnetic attraction piece 35.

According to the clamping device provided by the utility model, the circular saw is limited to be further deep by the magnetic attraction force of the magnetic attraction piece 35 and the circular saw, the magnetic attraction type depth limiting transposition is convenient and fast to operate, small-scale adjustment can be carried out according to actual use conditions, the use is convenient, and the rapid and smooth operation is facilitated.

The conventional lumbar foramen mirror operation sequence is that a puncture needle is punctured to the tip of the lumbar upper joint protrusion of an intervertebral foramen region under perspective, a guide needle is replaced, a step-by-step sleeve and an outer sleeve are placed, the inner core of the sleeve is taken out, a trepan is placed, part of the upper joint protrusion is removed by trepan trepanning by bare hands to enlarge and form the intervertebral foramen, and the working sleeve and the intervertebral foramen mirror are placed by taking out the trepan to carry out corresponding operation.

The working principle of the utility model is as follows: when the trepan works, the trepan depth limiting device can be fixed on the trepan, and when the trepan is in a set depth, the trepan depth limiting device can form shielding on the outer sleeve to prevent the trepan from further deepening, so that the trepan is prevented from damaging nerve tissues on the deep surface due to inertia, and the position of the trepan depth limiting device can be adjusted up and down at any time according to the requirement in operation so as to achieve the purpose of operation.

The concrete working process is as follows: the first hinge connecting shaft 11 of the first encircling member 1 is placed at the cavity of the second hinge connecting shaft 22 of the second encircling member 2, the first hinge connecting shaft 11 and the second hinge connecting shaft 22 are connected together through a rotating shaft, one end part of the first encircling member 1 and one end part of the second encircling member 2 are detachably connected, the first connecting pore canal 12 of the other end part of the first encircling member 1 and the second connecting pore canal 23 of the other end part of the second encircling member 2 are connected through the connecting screw 4, the first encircling member 1 and the second encircling member 2 form a hollow annular encircling shape in the middle, the annular saw is placed in the middle hollow formed by the first encircling member 1 and the second encircling member 2, the position of the annular saw is adjusted, the annular saw is reset through loosening the handle 38, the spring 36, the limiting block 34 in the movable groove 32 is driven to horizontally move towards the direction close to the annular saw, the guide rod 33 is driven to horizontally move towards the direction close to the annular saw, the annular saw is fixed by the magnetic attraction piece 35 on the guide rod 33, the annular saw is required to be adjusted again, or the annular saw is required to be pulled out of the annular saw 35 when the annular saw is required to be pulled out, and the annular saw is required to be adjusted again, and the position is required to be adjusted.

According to the adjustable trepan depth limiting device provided by the embodiment of the utility model, the first embracing piece 1 and the second embracing piece 2 are connected to form a hollow embracing shape, the semicircular grooves formed on the opposite surfaces of the two embracing pieces form a circular hollow placing area, the trepan is placed in the hollow part, and is clamped and fixed from the side by the action of the guide rod 33, the limiting block 34 and the magnetic attraction piece 35 after being adjusted to a proper position, so that the trepan is prevented from further penetrating deep into the intervertebral foramen under the action of inertia, the risk of damage to nerve tissues is reduced, the safety range of the trepan work can be adjusted and set according to the operation requirement, the depth can be adjusted conveniently and quickly at any time in the actual operation, the safe and rapid operation is promoted, the flexibility is high, and the technical problem that the trepan depth cannot be limited and adjusted, and the trepan is easily damaged to the nerve tissues is solved.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model 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 technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims (6)

1. An adjustable trepan depth limiting device, comprising: the clamping device comprises a first encircling piece (1) and a second encircling piece (2), grooves are symmetrically formed in opposite surfaces of the first encircling piece (1) and the second encircling piece (2), two ends of the first encircling piece (1) and two ends of the second encircling piece (2) are detachably connected through a first connecting piece and a second connecting piece respectively, a fixing pore channel (21) is horizontally formed in the middle of the second encircling piece (2) in a penetrating mode, and a clamping device is arranged in the fixing pore channel (21);

the clamping device comprises a clamping seat (31), a movable groove (32) is formed in the middle of the clamping seat (31), a guide rod (33) capable of horizontally sliding in the movable groove (32) is arranged in the movable groove (32), the front end of the guide rod (33) penetrates through the movable groove (32) to extend into the groove, a clamping piece is arranged at the end of the guide rod, a limiting block (34) is sleeved on the guide rod (33), an elastic piece is arranged between the limiting block (34) and the rear wall of the clamping seat (31), the elastic piece is sleeved on the outer wall of the guide rod (33), and the rear end of the guide rod (33) extends to the outer part of the second encircling piece (2) and is connected with a handle (38).

2. The adjustable trepan depth limiting device according to claim 1, wherein the first connecting piece is a connecting hinge, the connecting hinge comprises a first hinge connecting shaft (11) arranged at one end of the first encircling piece (1) and a second hinge connecting shaft (22) arranged at one end of the second encircling piece (2), through holes are vertically formed in the first hinge connecting shaft (11) and the second hinge connecting shaft (22), a rotating shaft is arranged on the through holes, and the first hinge connecting shaft (11) is rotationally connected with the second hinge connecting shaft (22) through the rotating shaft.

3. The adjustable trepan depth limiting device according to claim 2, wherein the other end parts of the first encircling member (1) and the second encircling member (2) are radially extended to be respectively provided with encircling connecting pieces, first connecting holes (12) and second connecting holes (23) are correspondingly formed in the encircling connecting pieces respectively, the second connecting pieces are placed on the first connecting holes (12) and the second connecting holes (23), and the second connecting pieces are connecting screws (4).

4. An adjustable trepan depth limiting device according to claim 1, characterized in that the clamping member is a magnetic attraction member (35).

5. An adjustable trepan depth limiting device according to claim 1, characterized in that the elastic member is a spring (36).

6. An adjustable trepan depth limiting device according to claim 1, characterized in that the clamping device further comprises locking seats (37), the locking seats (37) being provided at both ends of the clamping seat (31).