CN219109586U - Pulling force controllable nerve retractor - Google Patents

Abstract

The utility model discloses a nerve retractor with controllable pulling force, which belongs to the field of medical appliances and comprises: the device comprises a drag hook, a tension display structure, a handheld handle, a height adjusting unit and a fixing unit; the drag hook sets up in pulling force display structure one end, and handheld handle sets up at pulling force display structure other end, and pulling force display structure is connected to high adjusting unit one end, and the fixed unit is used for wholly fixing the nerve drag hook on the connective bar in the other end connection. The nerve retractor is temporarily fixed on the connecting rod through the height adjusting unit and the fixing unit, so that the stability of the nerve retractor is greatly enhanced, and meanwhile, an operator can know the tension value of the retractor on nerve roots and dura mater sacs in real time through the tension display structure, so that iatrogenic injury is avoided to the greatest extent. The utility model has simple structure and easy operation, and is particularly suitable for popularization and application in spinal surgery.

Description

Pulling force controllable nerve retractor

Technical Field

The utility model belongs to the field of medical appliances, relates to a device for protecting nerves and dura mater sacs in lumbar posterior surgery, and in particular relates to a nerve retractor with controllable pulling force.

Background

With the development of economy and advancement of medical technology, many patients suffering from lumbar vertebra-related diseases have been selected to a hospital for surgical treatment. For most lumbar posterior operations, the nerve roots and the dural sac are required to be retracted by using a drag hook for protection, and a safe space is created for further cutting off the intervertebral disc and intervertebral bone grafting. However, in the process of treating the intervertebral disc or the bone grafting, the nerve retractor can collide with other tools to swing or slide left and right, so that the nerve root and the dura mater sac are cut or extruded; in addition, the bearable tension of the nerve root and the dura mater sac has a certain upper limit, the more serious the nerve is pressed, the lower the bearable tension upper limit is, the accurate force is difficult to grasp by a human hand, and the nerve tissue damage can be caused by exceeding the maximum bearable tension of the nerve and the dura mater sac in the pulling process. Light weight results in slow recovery of the patient after surgery, and heavy weight results in sensory and motor impairment of the innervation area, which has a great impact on the quality of life of the patient.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a nerve retractor with controllable pulling force, so as to solve the technical problem that the pulling force cannot be visualized by using the retractor in the prior art.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

a pull-controllable nerve retractor comprising: the device comprises a drag hook, a tension display structure, a handheld handle, a height adjusting unit and a fixing unit; the drag hook sets up in pulling force display structure one end, and handheld handle sets up at pulling force display structure other end, and pulling force display structure is connected to high adjusting unit one end, and the fixed unit is used for wholly fixing the nerve drag hook on the connective bar to the other end, the drag hook is 90 bending state, and the bending part of drag hook is parallel with high adjusting unit.

Preferably, the height adjusting unit includes: a first height adjustment structure, a height adjustment switch, and a second height adjustment structure; the second height adjusting structure is arranged in the first height adjusting structure in a sliding manner, and the height adjusting switch is arranged on the first height adjusting structure and is in contact with the second height adjusting structure and used for locking or loosening the first height adjusting structure and the second height adjusting structure.

Preferably, the fixing unit comprises a fixing ring, a fixing switch and a connecting pipe, the connecting pipe is connected with the fixing ring in the height adjusting unit and arranged at the bottom end inside the connecting pipe, and the fixing switch for adjusting the opening size of the fixing ring is arranged in the connecting pipe and contacted with the fixing ring.

Preferably, the retainer plate includes first retainer plate and second retainer plate, and the second retainer plate is fixed in the connecting pipe bottom, and first retainer plate one end slides and sets up in the connecting pipe and fixed switch bottom rigid coupling.

Preferably, the lower end of the fixed switch is provided with external threads, the connecting pipe is internally provided with internal threads matched with the fixed switch, and the fixed switch is matched with the connecting pipe to be used for adjusting the opening size of the fixed ring.

Preferably, the tension display structure comprises a spring, a fixed shell and a pointer; one end of the fixing shell is connected with the handheld handle, one end of the spring, which is close to the handheld handle, is fixed in the fixing shell, the other end of the spring is connected with one end of the draw hook which stretches into the fixing shell, and one end of the spring connected with the draw hook is provided with a pointer.

Preferably, the fixed shell is provided with scales, and the scales and the pointers are matched to display real-time pulling force of the drag hook.

Preferably, a clamping device for clamping the fixed drag hook is arranged in one end of the fixed shell, which extends into the drag hook.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model discloses a nerve retractor with controllable tension, which is characterized in that the nerve retractor is temporarily fixed on a connecting rod through a height adjusting unit and a fixing unit, so that the stability of the nerve retractor is greatly enhanced, and an operator can know the tension value of the retractor on nerve roots and dura mater sacs in real time through a tension display structure, so that iatrogenic injury is avoided to the greatest extent. The utility model has simple structure and easy operation, and is particularly suitable for popularization and application in spinal surgery.

Further, the height adjusting unit is used for adjusting the overall temporary fixed height of the nerve drag hook, the position of the first height adjusting structure and the position of the second height adjusting structure can be fixed after the height adjusting switch is shifted leftwards, the second height adjusting structure can be moved up and down to a proper position after being shifted rightwards, and then the position of the first height adjusting structure and the position of the second height adjusting structure are fixed through locking of the height adjusting switch.

Further, in the fixing unit, the opening size of the fixing ring is adjusted through the threaded fit of the fixing switch and the connecting pipe, so that the nerve retractor is integrally fixed on the connecting rod.

Further, after the spring in the tension display structure is stressed, the pointer arranged on the spring is pulled to move together, and the scale value on the fixed shell corresponding to the pointer is the tensile force value.

Drawings

FIG. 1 is a front view of the present utility model;

FIG. 2 is a top view of the present utility model;

FIG. 3 is a cross-sectional view taken along the A-A direction of the present utility model.

Wherein: 1-drag hook; 2-a tension value display structure; 3-a hand-held handle; 4-a first height adjustment structure; 5-height adjustment switch; 6-a second height adjustment structure; 7-fixing rings; 8-a fixed switch; 9-connecting pipe.

Detailed Description

In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which 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 present utility model without making any inventive effort, shall fall within the scope of the present utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The utility model is described in further detail below with reference to the attached drawing figures:

the utility model provides the nerve retractor which can prevent left and right swing and sliding, can know the tension value applied to nerves in real time and can reduce the tension of iatrogenic nerve injury. Referring to fig. 1 to 3, the specific technical scheme is as follows:

the utility model discloses a nerve retractor with controllable pulling force, which comprises: the device comprises a drag hook 1, a tension display structure 2, a handheld handle 3, a height adjusting unit and a fixing unit; the drag hook 1 sets up in pulling force display structure 2 one end, and handheld handle 3 sets up at pulling force display structure 2 other end, and pulling force display structure 2 is connected to high adjusting unit one end, and the fixed unit is used for wholly fixing the nerve drag hook on the connective bar to the other end, drag hook 1 is 90 bending state, and drag hook 1's bending part is parallel with high adjusting unit.

Preferably, the height adjusting unit includes: a first height adjustment structure 4, a height adjustment switch 5 and a second height adjustment structure 6; the second height adjusting structure 6 is slidably arranged in the first height adjusting structure 4, and the height adjusting switch 5 is arranged on the first height adjusting structure 4 and is in contact with the second height adjusting structure 6 for locking or releasing the first height adjusting structure 4 and the second height adjusting structure 6.

As a preferred scheme, the fixing unit comprises a fixing ring 7, a fixing switch 8 and a connecting pipe 9, wherein the connecting pipe 9 is connected with the fixing ring 7 at the bottom end inside the connecting pipe 9 in the height adjusting unit, and the fixing switch 8 for adjusting the opening size of the fixing ring 7 is arranged in the connecting pipe 9 and contacted with the fixing ring 7. The fixed ring 7 comprises a first fixed ring and a second fixed ring, the second fixed ring is fixed at the bottom end of the connecting pipe 9, and one end of the first fixed ring is slidably arranged in the connecting pipe 9 and fixedly connected with the bottom end of the fixed switch 8. The lower extreme of fixed switch 8 is provided with the external screw thread, is provided with in the connecting pipe 9 with fixed switch 8 complex internal screw thread, and fixed switch 8 and connecting pipe 9 cooperation are used for adjusting the opening size of retainer plate 7.

Preferably, the tension display structure 2 comprises a spring, a fixed shell and a pointer; one end of the fixing shell is connected with the handheld handle 3, one end of the spring, which is close to the handheld handle 3, is fixed in the fixing shell, the other end of the spring is connected with one end of the draw hook 1 which stretches into the fixing shell, and one end of the spring connected draw hook 1 is provided with a pointer. The fixed shell is provided with scales, and the scales are matched with the pointer to display the real-time pulling force of the drag hook 1. The fixing shell is internally provided with a clamping device which is used for clamping and fixing the drag hook 1 at one end which stretches into the drag hook 1.

Principle of operation

The nerve retractor is temporarily fixed on the connecting rod through the height adjusting unit and the fixing unit, so that the stability of the nerve retractor is greatly enhanced, and meanwhile, an operator can know the tension value of the retractor on nerve roots and dura mater sacs in real time through the tension display structure 2, so that iatrogenic injury is avoided to the greatest extent. The height adjusting unit is used for adjusting the overall temporary fixed height of the nerve drag hook, the position of the first height adjusting structure 4 and the position of the second height adjusting structure 6 can be fixed after the height adjusting switch 5 is shifted leftwards, the second height adjusting structure 6 can be moved up and down to a proper position after being shifted rightwards, and then the position of the first height adjusting structure 4 and the position of the second height adjusting structure 6 are fixed through locking of the height adjusting switch 5. In the fixing unit, the opening size of the fixing ring 7 is adjusted through the threaded fit of the fixing switch 8 and the connecting pipe 9, so that the nerve drag hook is integrally fixed on the connecting rod, the pointer arranged on the nerve drag hook is pulled to move together after the spring in the tension display structure 2 is stressed, and the scale value on the fixing shell corresponding to the pointer is the tension value.

In summary, the utility model belongs to the field of medical instruments, and relates to a nerve retractor capable of controlling the pulling force. For most lumbar posterior operations, the nerve roots and the dural sac are required to be retracted by using a drag hook for protection, and a safe space is created for further cutting off the intervertebral disc and intervertebral bone grafting. But the nerve root and the dura mater sac have smaller bearing capacity on cutting and extrusion, and the bearable tensile force of the nerve root and the dura mater sac also has a certain upper limit, and the more serious the nerve is pressed, the lower the bearable tensile force upper limit is. The nerve retractor is combined with the operation characteristics of the nerve retractor, the handle of the nerve retractor is temporarily fixed on the rear connecting rod, the handle is only allowed to slide back and forth, and cutting or squeezing injuries caused by left and right swing or sliding of the retractor to nerve roots and dura mater sacs are reduced. When the nerve retractor is used for retracting nerve roots and the dura mater sac, the tension value display structure can display the applied tension value in real time, so that the damage to the nerve roots and the dura mater sac caused by overlarge tension is reduced, and the iatrogenic nerve damage is reduced to the greatest extent.

The above is only for illustrating the technical idea of the present utility model, and the protection scope of the present utility model is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present utility model falls within the protection scope of the claims of the present utility model.

Claims (8)

1. A pull-controllable nerve retractor, comprising: the device comprises a drag hook (1), a tension display structure (2), a hand-held handle (3), a height adjusting unit and a fixing unit; the drag hook (1) sets up in pulling force demonstration structure (2) one end, and handheld handle (3) set up at pulling force demonstration structure (2) other end, and pulling force demonstration structure (2) are connected to high adjusting unit one end, and the fixed unit is used for wholly fixing the nerve drag hook on the connective bar to the other end, drag hook (1) is 90 bending state, and the bending part and the high adjusting unit of drag hook (1) are parallel.

2. The pull-controllable nerve retractor of claim 1, wherein said height adjustment unit comprises: a first height adjustment structure (4), a height adjustment switch (5) and a second height adjustment structure (6); the second height adjusting structure (6) is arranged in the first height adjusting structure (4) in a sliding manner, and the height adjusting switch (5) is arranged on the first height adjusting structure (4) and is in contact with the second height adjusting structure (6) and used for locking or loosening the first height adjusting structure (4) and the second height adjusting structure (6).

3. The nerve retractor with controllable pulling force according to claim 1, wherein the fixing unit comprises a fixing ring (7), a fixing switch (8) and a connecting pipe (9), the connecting pipe (9) is connected with the fixing ring (7) at the height adjusting unit and is arranged at the bottom end inside the connecting pipe (9), and the fixing switch (8) for adjusting the opening size of the fixing ring (7) is arranged in the connecting pipe (9) and is contacted with the fixing ring (7).

4. A pull-controllable nerve retractor according to claim 3, wherein the fixing ring (7) comprises a first fixing ring and a second fixing ring, the second fixing ring is fixed at the bottom end of the connecting pipe (9), and one end of the first fixing ring is slidably arranged in the connecting pipe (9) and fixedly connected with the bottom end of the fixed switch (8).

5. A pull-controllable nerve retractor according to claim 3, wherein the lower end of the fixing switch (8) is provided with external threads, the connecting tube (9) is internally provided with internal threads matched with the fixing switch (8), and the fixing switch (8) is matched with the connecting tube (9) for adjusting the opening size of the fixing ring (7).

6. A pull-controllable nerve retractor according to claim 1, wherein the pull-displaying structure (2) comprises a spring, a fixed housing and a pointer; one end of the fixing shell is connected with the hand-held handle (3), one end of the spring, which is close to the hand-held handle (3), is fixed in the fixing shell, the other end of the spring is connected with one end of the draw hook (1) which stretches into the fixing shell, and one end of the spring is connected with the draw hook (1) which is provided with a pointer.

7. The nerve retractor with controllable pulling force according to claim 6, wherein the fixed shell is provided with scales, and the scales and the pointers are matched to display the real-time pulling force of the retractor (1).

8. The nerve retractor with controllable pulling force according to claim 6, wherein a clamping device for clamping the retractor (1) is arranged in one end of the retractor (1) extending into the fixing housing.

Images