CN212940054U - Pen-held type rat spinal cord transection cutter - Google Patents

Abstract

The utility model belongs to the field of medical equipment, in particular to a pen-held type rat spinal cord transection cutter, which comprises a blade and a fixed frame, wherein the fixed frame is composed of 2 fixed wires which are arranged in parallel, one end of the fixed frame is provided with a C-shaped bracket, the head part of the blade corresponds to the bracket, the blade can move up and down along the fixed frame to cut off the spinal cord in the bracket, the rat spinal cord transection operation can be carried out by adopting the utility model, the operation can be completed by one cutter without the need of the prior method or the need of the tools to operate simultaneously and cooperatively, because the bracket is composed of 2 fixed wires, the volume and the height of the instrument entering an operation window are reduced, the insertion of the bracket is more convenient, the whole operation incision has no edge, the wound to the muscle tissue around the spinal column is reduced, the operation space required by the operation is small, and the size of the operation window can be greatly, the minimally invasive surgery is realized, the postoperative recovery is facilitated, the spinal cord is supported by the bracket, and the blade can be cut off at one time along the movement of the bracket.

Description

Pen-held type rat spinal cord transection cutter

Technical Field

The utility model belongs to the field of medical equipment, specifically relate to a pen-hold formula rat spinal cord transection cutterbar.

Background

The incidence of spinal cord injuries is increasing due to various causes, and motor, sensory and visceral functions of the patient below the level of injury can be caused after spinal cord injury. How to effectively treat spinal cord injury and improve the life quality of patients is a hot spot and key point to be urgently solved in the current medical research. Because the clinical development of systematic pathological research is difficult, the experimental research by establishing an animal model is particularly important.

The method for establishing the spinal cord injury experimental model at present comprises a spinal cord transection method, a weight falling method, an artery clamp pressure method, a contusion model, a vein compression method, a chemical medicine mediation and the like, the corresponding modeling methods and research objects are different, and the spinal cord transection method has the greatest advantage that the consistency of the experimental model can be ensured to a great extent, and is beneficial to developing experimental researches of a treatment method and a curative effect related mechanism. The current method of transecting the spinal cord is generally accomplished by using various surgical knives, tissue scissors or ophthalmic scissors in cooperation with some other tools (such as dental hooks).

The problems of exposure of current methods and tools for transecting the spinal cord are: firstly, multiple tools are required to be operated simultaneously and cooperatively, the operations of all research teams are difficult to be consistent, and the error of an experimental result is increased on a model level; secondly, when the operation is carried out by using the scalpel, the tip of the scalpel is easy to stick to the peripheral tissues of the vertebral canal except the spinal cord, such as nerves, muscles, blood vessels and the like, and the scalpel is often difficult to cut off at one time when in operation, so that the repeated cutting not only causes the cell apoptosis and necrosis of the spinal cord tissue caused by the uneven broken end of the spinal cord, but also increases the risk of cutting or sticking the tip to the peripheral tissues of the vertebral canal certainly. When the traditional scissors are used for operation, the scissors below the sheared tissue often excessively damage the outer spinal cord membrane, so that the spinal cord damage sections of experimental animals are inconsistent, the performances of the animals after molding are inconsistent certainly, and the requirements of standardized animal models cannot be met. The operation window for exposing the spinal cord is too large, which is convenient for operation but not beneficial to postoperative recovery and even torsional deformation of animal body caused by unstable spinal column, and subsequent experimental study cannot be carried out. Animals such as rats for establishing the spinal cord injury experimental model have small spinal cords, and common surgical tools are inconvenient to operate.

In summary, there is a need for a surgical tool capable of cutting off the spinal cord rapidly and precisely and reducing the surgical trauma, which can solve the existing transection problem, and is used for preparing a standardized experimental animal model of spinal cord injury.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a pen-held type rat spinal cord transecting cutterbar that convenient operation, operating space are little and cutting effect is good.

The utility model discloses an content includes blade and mount, the mount comprises 2 parallel arrangement's fixed silk, mount one end is provided with the bracket that is C form, and the tool bit portion of blade is corresponding with the bracket, and the blade can be followed the mount up-and-down motion to cut off the spinal cord that is located the bracket.

Further, 2 fixed wires have a gap therebetween corresponding to the thickness of the blade, and the blade moves up and down along the gap.

Furthermore, the ends of the 2 fixing wires are connected with each other in a circular arc shape.

The utility model discloses still include the inside handheld portion that link up, the other end and the handheld fixed connection of portion of mount, it is provided with the sliding block of being connected with the blade to slide in the handheld portion.

Furthermore, a guide groove is formed in the handheld portion, and a guide block corresponding to the guide groove is arranged on the sliding block.

Furthermore, an operating rod is arranged on one side, away from the blade, of the sliding block.

Furthermore, be provided with spacing portion of spring I on the action bars, be provided with spacing portion of spring II between the sliding block and the spacing portion of spring I in the handheld portion, be provided with the spring between spacing portion of spring I and the spacing portion of spring II.

Furthermore, a stepping motor, a control chip and a battery which are electrically connected with each other are arranged in the handheld portion, a threaded hole matched with an output shaft of the stepping motor is formed in the sliding block, and a control button electrically connected with the control chip is arranged on the outer wall of the handheld portion.

Furthermore, the outer wall of the handheld part is provided with a support sleeve in a sliding mode, and when the spinal cord is cut, the support sleeve slides to the position of the operation window to prop open the operation window.

Furthermore, the fixing frame is made of an insulating material.

The beneficial effects of the utility model are that, adopt the utility model discloses carry out the rat spinal cord transection operation, the operation can be accomplished to a cutterbar, need not like current method or instrument need multiple instrument concurrent operation, because the bracket comprises 2 fixed silks, reduce the volume and the height that get into the interior apparatus of operation window, the insertion of the bracket of being more convenient for, make the whole edge-free edge of operation incision, reduce the wound to tissue around the spinal cord and to the damage of the outer centrum tissue of spinal cord, the required operating space of operation is little, therefore, the size that can greatly reduced operation window was seted up, realize minimally invasive surgery, do benefit to the postoperative and resume, the spinal cord is held to the bracket, the blade can realize once only cutting off along the bracket motion, avoid cutting repeatedly and increase the operation injury, and simultaneously, can be with horizontal, the angle of the operation person's of being convenient for to operate. The utility model is time-saving and labor-saving when used for operation, shortens the operation time, is simpler to operate and reduces the professional ability required by the operator;

the 2 fixing wires are arranged in the gap corresponding to the thickness of the blade, so that the probability of one-time cutting is improved, the blade moves up and down along the gap, the blade is ensured not to deviate when moving up and down, and the blade is prevented from being broken or being cut off;

the end parts of the 2 fixing wires are mutually connected in an arc shape, so that other tissues except the periphery of the spinal cord to be cut are prevented from being contused;

the handheld part is arranged, so that the operation of an operator is facilitated, the installation of the blade driving structure is facilitated, and the use experience is improved;

the blade is driven to move up and down by the stepping motor, so that time and labor are saved, and the operation is easy.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a front sectional view of the first embodiment of the present invention.

Fig. 3 is a bottom view of the first embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 5 is a front sectional view of a second embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a third embodiment of the present invention.

Fig. 7 is a front sectional view of a third embodiment of the present invention.

Fig. 8 is a sectional view taken along line a-a in fig. 7.

Fig. 9 is a front sectional view of a fourth embodiment of the present invention.

In the figure, 1 blade, 2 fixing frames, 21 brackets, 22 gaps, 3 handheld parts, 31 guide grooves, 32 spring limiting parts II, 33 end covers, 34 through grooves, 4 sliding blocks, 41 guide blocks, 42 threaded holes, 5 operating rods, 51 spring limiting parts I, 52 retaining rings, 6 springs, 7 stepping motors, 71 output shafts, 8 control chips, 9 batteries and 10 supporting sleeves.

Detailed Description

The utility model is used for carry out the transection to the rat spinal cord to establish spinal cord injury experimental model.

Example one

As shown in fig. 1-3, the utility model discloses a blade 1 and mount 2, mount 2 comprises 2 parallel arrangement's fixed silk, and mount 2 wholly is the fishhook form, and one end is provided with the bracket 21 that is the C form, and the tool bit portion of blade 1 corresponds with bracket 21, and blade 1 can follow mount 2 up-and-down motion to cut off the spinal cord that is located bracket 21.

Taking an example of establishing a spinal cord injury experimental model operation for a transverse spinal cord of an adult SD experimental rat, before the operation, firstly, an operation window is established for a back median incision corresponding to a T10 segment of a thoracic vertebra of the experimental rat, in the transverse operation, a section of the bracket 21 is inserted into the operation window, the bracket 21 rotates around the spinal cord to enter until the bracket 21 is attached to the inner side of the spinal cord, then the blade 1 is operated to enable the cutter head of the blade 1 to move downwards to cut off the spinal cord, and finally the blade 1 is retracted to be drawn out or wound out of the bracket 21 to complete the operation. The utility model is adopted to carry out the spinal cord transection operation, the operation can be completed by one cutter without the need of the simultaneous cooperative operation of a plurality of tools like the existing spinal cord transection method, because the bracket 21 is composed of 2 fixing wires, the volume and the height of the instrument entering the operation window are reduced, the insertion of the bracket 21 is more convenient, the whole body has no edge, the wound to the tissues around the spinal cord is reduced, and the operation space required by the operation is small, therefore, compared with the existing spinal cord transection operation, the size of the operation window can be greatly reduced, the minimally invasive operation is realized, the postoperative recovery of the experimental mouse is facilitated, the spinal cord is supported by the bracket 2, the blade 1 can realize one-time cutting along the movement of the bracket 2, the phenomenon of the apoptosis and the necrosis of the cells of the spinal cord due to the uneven spinal cord ends caused by the repeated cutting is avoided, simultaneously, the utility model can not only carry, the angle of the operation of being convenient for of operative person such as side direction is operated, also because can the multi-angle operate, the operation window also needn't rely on rongeur to bite out the vertebra like in the past and open the operation window, only need from the upper and lower articular process next door minimumly of two centrums open the window can, through the utility model discloses operate, labour saving and time saving operates more simply, reduces the required professional ability of operative person.

A gap 22 corresponding to the thickness of the blade 1 is formed between the 2 fixed wires, and the blade 1 moves up and down along the gap 22. The probability of one-time cutting is greatly improved, the blade 1 is guaranteed not to deviate when moving up and down, and the accident that the blade 1 is broken or cut off is avoided. In this embodiment, the gap 22 between the 2 fixed wires is slightly wider than the thickness of the blade 1, so as to ensure smooth sliding of the blade 1 and improve the cutting effect.

Specifically, 2 fixed silk tip are circular-arc interconnect, are similar to the clip structure, avoid bracket 21 to insert the in-process of operation window relying on the spinal cord, and bracket 21 tip contusion injures other tissues except the spinal cord periphery that need cut.

The fixing frame 2 is preferably made of an insulating material, such as high-strength glass, so that nerve impulses caused by spinal cord discharge during a bone marrow transection operation are avoided.

For the convenience of operation, the utility model discloses still include inside handheld portion 3 that link up, the other end and the 3 fixed connection of handheld portion of mount 2, it is provided with the sliding block 4 of being connected with blade 1 to slide in the handheld portion 3, sets up handheld portion 3, and the art of being convenient for person grasps the utility model discloses, simultaneously, slide blade 1 through sliding block 4 and set up in handheld portion 3, improve the accuracy of the up-and-down motion of blade 1, in this embodiment, with mount 2 one end and the 3 fixed connection of handheld portion that deviate from bracket 21, and have certain length, guarantee the operation in-process, the art person field of vision is good, reduces the operation degree of difficulty.

In addition, the outer part of the handheld part 3 can be circular, rectangular or other shapes convenient for holding, in this embodiment, the handheld part 3 is in the shape of a cylinder with both the outer part and the inner part being circular.

As shown in fig. 2 and 3, in order to further ensure that the blade 1 does not deviate when moving up and down, the guide groove 31 is provided in the hand-held portion 3, the slide block 41 corresponding to the guide groove 31 is provided on the slide block 4, and in this embodiment, 3 sets of the guide groove 31 and the slide block 41 are arranged along the axis of the cylinder at equal intervals.

In order to operate the sliding block 4, the sliding block 4 is provided with an operating rod 5 on one side departing from the blade 1, and the other side of the operating rod 5 penetrates out of the handheld part 3, so that the blade 1 can move up and down by driving the operating rod 5 up and down.

The operating rod 5 is provided with a spring limiting part I51, a spring limiting part II 32 is arranged between the sliding block 4 and the spring limiting part I51 in the handheld part 3, a spring 6 is arranged between the spring limiting part I51 and the spring limiting part II 32, the spring 6 is arranged, certain resistance can be provided when the operating blade 1 moves downwards, the situation that the blade 1 moves downwards when the bracket 21 is not positioned with the spinal cord through gravity or error of an operator is avoided, other tissues are cut, and meanwhile, a restoring force can be provided after the blade 1 cuts the spinal cord is avoided, in the embodiment, one side of the operating rod 5 extending out of the handheld part 3 is made into a button shape, in a default state, the limit stroke of the spring limiting part I51 for compressing the spring 6 is consistent with the stroke from the cutter head of the blade 1 to the cutter slot 22 at the bottom of the bracket 21, namely, the operator presses the operating rod 5 until the operating rod is pressed still, the blade 1 just cuts the spinal cord, greatly reducing the operation difficulty.

Example two

Referring to fig. 4 to 5, the present embodiment is substantially the same as the first embodiment, except that: the end of the operating rod 5 does not exceed the end of the hand-held part 3, the two ends extend to the side edges to be provided with the retaining rings 52, the two sides of the hand-held part 3 corresponding to the retaining rings 52 are provided with the through grooves 34, during operation, two fingers of an operator clamp the retaining rings 52 to move downwards, when the retaining rings 52 move downwards to the bottom ends of the through grooves 34, the cutter head of the blade 1 is just inserted into the cutter gap 22 in the bracket 21, and the position relation between the retaining rings 52 and the through grooves 34, namely the position relation between the cutter head of the blade 1 and the bracket 21, further simplifies the operation difficulty.

EXAMPLE III

Referring to fig. 6 to 8, the present embodiment is substantially the same as the first embodiment, except that: the operating rod 5, the spring 6 and the spring limiting part are replaced by a stepping motor 7, a control chip 8 and a battery 9 which are electrically connected with each other, in the embodiment, the handheld part 3 sequentially comprises an end cover 33, the battery 9, the control chip 8, the stepping motor 7, an output shaft 71, a sliding block 4 with a threaded hole 42 and a blade 1 from top to bottom, a control button electrically connected with the control chip 8 is arranged on the outer wall of the handheld part 3, the control button comprises a start button, a quick button, a reset button and an automatic button, the start button controls the stepping motor 7 to drive the output shaft 71 to rotate forwards and drive the sliding block 4 to move downwards to cut a spinal cord; the quick button controls the rotating speed of the stepping motor 7 to accelerate the cutting speed; reset button controls 7 reversals of step motor after the cutting, and 4 upward movements of drive sliding block reset, and the accessible time of automatic button 7 corotation of steerable step motor accomplishes the cutting back and immediately turns round the horse and resets, in this embodiment, can also provide the gear button, realizes the whole cutting and the partial cutting of spinal cord, reciprocates through step motor drive blade 1, guarantees that cutting speed is mild, operation labour saving and time saving.

EXAMPLE III

Referring to fig. 9, the present embodiment is substantially the same as the first embodiment, except that: the outer wall of the hand-held part 3 is provided with a support sleeve 10 in a sliding way, when cutting the spinal cord, the support sleeve 10 slides to the position of the operation window to open the operation window, when in use, the support sleeve 10 slides to the upper side of the hand-held part 3 at first, the operation of the fixing frame 2 is not influenced, the visual field of an operator is ensured to be good, when the bracket 21 holds the spinal cord to be cut, the support sleeve 10 slides to the operation window at first to open the outer wall of the operation window, the blade 1 is prevented from cutting the outer wall tissue of the operation window when moving downwards, unnecessary loss and the cutting effect of the spinal cord are prevented, in the embodiment, the support sleeve 10 is preferably made of transparent material, when the support sleeve 10 opens the outer wall of the operation window, the operator can still clearly see the operation state, the cross section shapes of the outer wall of the support sleeve 10 and the hand-held part 3 are consistent, in addition, the sliding of, and mechanical driving modes such as a stepping motor and an air cylinder can also be adopted for driving.

Claims (10)

1. The utility model provides a pen-hold formula rat spinal cord transection cutterbar, characterized by, includes blade (1) and mount (2), mount (2) comprise 2 parallel arrangement's fixed silk, mount (2) one end is provided with bracket (21) that are C form, and the tool bit portion and bracket (21) of blade (1) are corresponding, and blade (1) can be followed mount (2) up-and-down motion to cut off the spinal cord that is located bracket (21).

2. The pen-held rat spinal cord transection cutter according to claim 1, wherein a gap (22) corresponding to the thickness of the blade (1) is provided between the 2 fixing wires, and the blade (1) moves up and down along the gap (22).

3. The pen-held rat spinal cord transection cutter as claimed in claim 2, wherein the ends of the 2 fixing wires are connected with each other in a circular arc shape.

4. A pen-held rat spinal cord transection cutter as claimed in any one of claims 1 to 3, further comprising a hand-held part (3) with a through-hole therein, wherein the other end of the fixing frame (2) is fixedly connected with the hand-held part (3), and a sliding block (4) connected with the blade (1) is slidably disposed in the hand-held part (3).

5. The pen-held rat spinal cord transection cutter according to claim 4, wherein a guide groove (31) is provided in the hand-held portion (3), and a guide block (41) corresponding to the guide groove (31) is provided on the slide block (4).

6. A pen-held rat spinal cord transection cutter as claimed in claim 5, characterized in that the side of the sliding block (4) facing away from the blade (1) is provided with an operating lever (5).

7. The pen-held rat spinal cord transection cutter as claimed in claim 6, wherein the operating rod (5) is provided with a spring limiting portion I (51), a spring limiting portion II (32) is arranged in the hand-held portion (3) and between the sliding block (4) and the spring limiting portion I (51), and a spring (6) is arranged between the spring limiting portion I (51) and the spring limiting portion II (32).

8. A pen-held rat spinal cord transection cutter as claimed in claim 5, characterized in that a stepping motor (7), a control chip (8) and a battery (9) are arranged in the hand-held part (3) and electrically connected with each other, a threaded hole (42) matched with an output shaft (71) of the stepping motor (7) is arranged on the sliding block (4), and a control button electrically connected with the control chip (8) is arranged on the outer wall of the hand-held part (3).

9. The pen-held rat spinal cord transection cutter as claimed in claim 4, wherein the outer wall of the hand-held part (3) is slidably provided with a support sleeve (10), and when the spinal cord is cut, the support sleeve (10) slides to the position of the operation window to prop open the operation window.

10. The pen-held rat spinal cord transection cutter according to claim 1, wherein the holder (2) is made of an insulating material.

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