Retractor for neurosurgery department

Abstract

The invention belongs to the technical field of medical instruments, and discloses a neurosurgery retractor which comprises a base, a motor is connected to the base, a two-way lead screw is fixedly connected to an output shaft of the motor, a pair of sliding blocks is connected to the two-way lead screw, and a first retraction arm and a second retraction arm are connected to the pair of sliding blocks through guide blocks respectively. The first retracting arm and the second retracting arm are both connected with retracting pieces and pressing pieces, the pair of retracting pieces are rotationally connected with baffles correspondingly, the pair of baffles are rotationally connected through a connecting rod, the retracting pieces are further connected with retracting air bags, a connecting shaft is arranged between the pair of pressing pieces, and the connecting shaft is connected with a limiting plate and an air storage bag. The retraction air bag is communicated with the air storage bag through an air guide pipe. The first retracting arm and the second retracting arm are driven by the motor to move oppositely so as to retract an operation wound, the retracting process is stable, the retracting distance and the fixing state are stable, and in the process of retracting the operation wound, the retracting air bag is flexibly connected with skin and flesh tissue in an abutting mode, so that damage to the operation wound tissue is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a retractor for neurosurgery. Background Art

[0002] Neurosurgery is a branch of surgery. Based on surgery as the main treatment method, it applies unique neurosurgical research methods to study the human nervous system, such as the brain, spinal cord, and peripheral nervous system, as well as related affiliated organs, such as the skull, scalp, cerebral blood vessels, meninges, etc. for injuries, inflammations, tumors, deformities, and certain genetic metabolic disorders or functional disorders. During neurosurgical treatment, a retractor is one of the commonly used instruments. It can be used to retract tissues, expose the surgical field, facilitate exploration and operation, and is an indispensable medical device in neurosurgery.

[0003] However, existing retractors often require manual control of the retraction distance and size. It is difficult for human strength to remain stable for a long time, which will make the retraction distance, size, and fixation state unstable. Whether it is a slight change in the retraction distance or the instability of the fixation state, it may affect the accuracy of the surgery and even increase the surgical risk. Moreover, during the retraction process, the retracting components are in "hard contact" with the skin and flesh tissues at the surgical incision. This "hard contact" compression may not only cause discomfort to the patient, but is more likely to cause additional tissue damage, such as skin indentation, subcutaneous bleeding, or nerve damage. These additional injuries not only prolong the patient's recovery period, but may also trigger a series of complications and affect the overall effect of the surgery. Summary of the Invention

[0004] The present invention aims to provide a retractor for neurosurgery. The first retracting arm and the second retracting arm are driven by a motor to move towards each other to retract the surgical incision. The retraction process is stable, and the retraction distance and fixation state are stable. A retracting airbag is connected to the retracting member. During the process of retracting the surgical incision, the retracting airbag is in flexible contact with the skin and flesh tissues, reducing the damage to the tissues at the surgical incision. The problems in the background art are solved.

[0005] To achieve the above object, the present invention provides the following technical solutions: A retractor for neurosurgery, comprising a base, the base is connected with a motor, the output shaft of the motor is fixedly connected with a bidirectional screw rod rotatably connected with the base, the bidirectional screw rod is threadedly connected with a pair of sliders moving towards each other, and the sliders are slidably arranged inside the base; a pair of the sliders are respectively connected with a first retracting arm and a second retracting arm, and the first retracting arm and the second retracting arm are arranged in a cross shape, both the first retracting arm and the second retracting arm are connected with a retracting member and a pressing member, the retracting member and the pressing member are respectively arranged at both ends of the first retracting arm and / or the second retracting arm, and the relative movement directions of a pair of the retracting members and a pair of the pressing members are opposite; an air storage bag is arranged between a pair of the pressing members, and a pair of the pressing members move towards each other to squeeze and / or pull the air storage bag; on one side where a pair of the retracting members are away from each other, both are connected with a retracting air bag, and the retracting air bag is communicated with the air storage bag through an air duct.

[0006] Further, the air storage bag is a self-restoring air bag, and the end faces of a pair of the pressing members close to each other are respectively connected with the left and right end faces of the air storage bag.

[0007] Further, a connecting shaft is arranged between a pair of the pressing members, the air storage bag is slidably sleeved outside the connecting shaft, and the pressing member is slidably connected with the connecting shaft.

[0008] Further, both ends of the connecting shaft are detachably connected with limiting plates, and the diameter of the limiting plate is larger than the diameter of the connecting shaft.

[0009] Further, the retracting member is in an "L" shape, and the inner side of the "L" shape is the side abutted against the skin and muscle tissue.

[0010] Further, the retracting air bag is connected to both the vertical plane and the horizontal plane of the inner side of the "L" shape of the retracting member.

[0011] Further, both the first retracting arm and the second retracting arm are provided with sliding grooves, a plurality of the retracting members are slidably connected to the sliding grooves, and a plurality of the retracting members are all connected with locking members for locking them with the first retracting arm and / or the second retracting arm.

[0012] Further, the first retracting arm is provided with a through groove, and the second retracting arm is slidably inserted through the through groove.

[0013] Further, baffles are respectively rotatably connected to one side where a pair of the retracting members are close to each other, and a connecting rod is rotatably connected between a pair of the baffles.

[0014] Further, a pair of the sliders are respectively fixedly connected with guide blocks, the first retractor arm and the second retractor arm are respectively connected with the pair of guide blocks, and the guide blocks are slidably disposed through the base; an end face of the base is slidably abutted against end faces of the first retractor arm and the second retractor arm, and the pressing member is connected to an end face where the first retractor arm and / or the second retractor arm is slidably abutted against the base.

[0015] The principle and beneficial effects of the technical solution are as follows: 1. A retractor for neurosurgery provided by the present invention connects a motor to a base, an output shaft of the motor is connected to a bidirectional lead screw rotatably connected to the base, the bidirectional lead screw is threadedly connected to a pair of sliders. When the motor is started, the pair of sliders move linearly in opposite directions (away from or close to each other) along the axial direction of the bidirectional lead screw under the action of the thread and the base. The pair of sliders are respectively connected to a first retractor arm and a second retractor arm arranged in a cross shape, and both ends of the first retractor arm and the second retractor arm are respectively connected to a retracting member and a pressing member. When the motor operates, the first retractor arm and the second retractor arm move in opposite directions (away from or close to each other) along with the movement of the sliders. When it is necessary to retract the surgical incision, the retracting members connected to the first retractor arm and the second retractor arm abut against the skin and muscle tissues at the position of the surgical incision, and the pair of retracting members move away from each other to retract the surgical incision. The motor is used as the power source to retract the surgical incision, and the retracting process is stable. By controlling the operating state (rotation period or operating time) of the motor, the retracting distance or the fixed state is stable; and in the process of the pair of retracting members moving away from each other to retract the surgical incision, the pressing members at the ends of the first retractor arm and the second retractor arm away from the retracting members move closer to each other, and the pressing members moving closer to each other squeeze the air storage bag, and the gas in the air storage bag is squeezed into the retracting air bag to make it inflated. The retracting air bag is arranged on one side where the retracting member abuts against the surgical incision tissue. That is, in the process of retracting the surgical incision, the retracting air bag is inflated and continuously expanded, and it is in flexible contact with the surgical incision tissue, reducing the damage to the surgical incision tissue during the retracting process; in the process of retracting the surgical incision, the inflation state of the retracting air bag and the magnitude of the squeezing force on the surgical incision tissue are positively correlated with the retracting distance required for the surgical incision, that is, the greater the retracting distance of the surgical incision, the greater the squeezing force on the surgical incision tissue, and the greater the degree / risk of damage to the surgical incision tissue; at the same time, the greater the retracting distance of the surgical incision, the greater the inflation amount of the retracting air bag, the better the contact effect with the surgical incision tissue, the better the flexible contact effect, and the better the protection effect on the surgical incision tissue. Therefore, by using the retractor of the present invention, the retracting effect on the surgical incision can be ensured, and the damage to the surgical incision tissue can be effectively reduced.

[0016] 2. A retractor for neurosurgery provided by the present invention, wherein the air storage bag is a self-restoring airbag, and a pair of pressing members are connected to the left and right end faces of the air storage bag. When the first retracting arm and the second retracting arm move away from each other to retract the surgical incision, the air storage bag is squeezed, and the gas inside it transfers to the side of the retracting airbag, making the retracting airbag in a filled state and in flexible contact with the tissue of the surgical incision; when the first retracting arm and the second retracting arm move closer to close the surgical incision, the air storage bag is pulled, and the gas in the retracting airbag transfers to the side of the air storage bag to facilitate the separation of the retracting airbag from the tissue of the surgical incision; a connecting shaft is arranged between the pair of pressing members, and the air storage bag is slidably sleeved on the outside of the connecting shaft, so that the squeezing and / or pulling effect of the pair of pressing members on the air storage bag is good, ensuring its functionality; limiting plates with a diameter larger than that of the connecting shaft are connected to both ends of the connecting shaft, which is convenient for the disassembly, debugging, replacement, etc. of the air storage bag, and can also limit the relative position of the pressing member and the connecting shaft to prevent the pair of pressing members from over-pulling the air storage bag or the pressing member slipping off the connecting shaft.

[0017] 3. A retractor for neurosurgery provided by the present invention, wherein the retracting member is set in an "L" shape, and the inner side of the "L" shape is the side in contact with the skin and flesh tissue, so that the contact effect between the retracting member and the skin and flesh tissue of the surgical incision is good, avoiding the wanton dispersion of the skin and flesh tissue and affecting the surgical incision vision; retracting airbags are connected to both the vertical plane and the horizontal plane on the inner side of the "L" shape of the retracting member, so that both the inner horizontal plane and the vertical plane of the skin and flesh tissue at the surgical incision position are in contact with the retracting airbag, further reducing the damage to the tissue at that place.

[0018] 4. A retractor for neurosurgery provided by the present invention, wherein chutes are provided on the first retracting arm and the second retracting arm, and other retracting members are connected by using the chutes. Multiple retracting members are used to contact the skin and flesh tissue at different positions of the surgical incision to improve the retracting effect on the surgical incision; the retracting member is connected with a locking member, so that the retracting member can slide along the chute to other positions of the first retracting arm and / or the second retracting arm according to actual needs, further improving the retracting effect on the surgical incision and the contact effect on the skin and flesh tissue.

[0019] 5. A retractor for neurosurgery provided by the present invention. A through groove is formed in the first retracting arm, and the second retracting arm slidably penetrates through the through groove. The first retracting arm and the second retracting arm are independent of each other and will not interfere with each other, so that the retracting members or pressing members connected to the first retracting arm and the second retracting arm can be arranged in pairs. A baffle is rotatably connected to the side of a pair of retracting members close to each other, and a connecting rod is rotatably connected between a pair of baffles. When the first retracting arm and the second retracting arm approach each other, a pair of baffles are folded and stored. When the first retracting arm and the second retracting arm move away from each other to retract the surgical incision, a pair of baffles open, pushing the skin and muscle tissue between them outwards. The entire retractor forms a closed loop frame to reduce the influence of the skin and muscle tissue on the surgical field. The slider is connected to the retracting arm through a guiding block, and the guiding block slidably penetrates through the base. The guiding block guides and limits the movement of the slider and / or the retracting arm relative to the base, improving the smoothness and functionality of the relative movement (of the slider and / or the retracting arm and the base). The end face of the base slidably abuts against the end faces of the first retracting arm and the second retracting arm, and the pressing member is connected to the end face of the first retracting arm and / or the second retracting arm that slidably abuts against the base, so that the base and the pressing member are completely on the same side (either on the upper side or on the lower side) of the retracting arms (the first retracting arm and the second retracting arm), facilitating the placement or fixation of the entire retractor during the process of retracting the surgical incision. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front view of a retractor for neurosurgery according to the present invention; Figure 2 is Figure 1 the sectional view taken along A-A in Figure 3 is Figure 1 the sectional view taken along B-B in Figure 4 is the structural schematic Figure 1 ; Figure 5 is the structural schematic Figure 2 ; Figure 6 is the top view of a retractor for neurosurgery according to the present invention.

[0021] The names of the corresponding reference signs in the drawings are: base 1, motor 2, bidirectional lead screw 3, slider 4, first retracting arm 5, second retracting arm 6, chute 7, retracting member 8, locking member 9, baffle 10, connecting rod 11, pressing member 12, connecting shaft 13, air storage bag 14, limiting plate 15, retracting airbag 16, guiding block 17. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further described in detail below with reference to the drawings and embodiments: AsFigures 1 to 6 As shown in the figure, a retractor for neurosurgery includes a base 1. A motor 2 is connected to the right end face of the base 1. The output shaft of the motor 2 is fixedly connected to a bidirectional lead screw 3 that is rotatably connected to the base 1. The bidirectional lead screw 3 is threadedly connected to a pair of sliders 4 that move towards each other. A guide block 17 that is slidably disposed through the base 1 is fixedly connected to the lower sides of the pair of sliders 4 respectively. A first retracting arm 5 and a second retracting arm 6 are respectively connected to the lower sides of the pair of guide blocks 17. The lower end face of the base 1 is in sliding contact with the upper end faces of the first retracting arm 5 and the second retracting arm 6. The first retracting arm 5 and the second retracting arm 6 are arranged in a cross shape. A through groove is formed in the first retracting arm 5, and the second retracting arm 6 is slidably disposed through the through groove. Retracting members 8 and pressing members 12 are respectively connected to the front and rear ends of the first retracting arm 5 and the second retracting arm 6. The relative movement directions of the pair of retracting members 8 and the pair of pressing members 12 are opposite. A baffle 10 is rotatably connected to the side of each pair of retracting members 8 that are close to each other. A connecting rod 11 is rotatably connected between the pair of baffles 10; Chute 7 is formed in both the first retracting arm 5 and the second retracting arm 6. The retracting member 8 is slidably connected to the chute 7, and the retracting member 8 is connected with a locking member 9 for locking it with the first retracting arm 5 and / or the second retracting arm 6. In this embodiment, the locking member 9 is a locking bolt. The retracting member 8 is in an "L" shape. The inner side of the "L" shape of the retracting member 8 is the side that abuts against the skin and tissue. Retracting air bags 16 are connected to both the vertical plane and the horizontal plane of the inner side of the "L" shape of the two retracting members 8 connected to the first retracting arm 5 and the second retracting arm 6; The pressing member 12 is connected to the upper end face of the first retracting arm 5 and / or the second retracting arm 6. A connecting shaft 13 is provided between the pair of pressing members 12. The pressing member 12 is slidably connected to the connecting shaft 13. The left and right ends of the connecting shaft 13 are detachably connected with a limiting plate 15, and the diameter of the limiting plate 15 is larger than the diameter of the connecting shaft 13. An air storage bag 14 is also slidably sleeved on the outer side of the connecting shaft 13. The air storage bag 14 is a self-restoring air bag, and the left and right end faces of the air storage bag 14 are respectively connected to the end faces of the pair of pressing members 12 that are close to each other. The pair of pressing members 12 move towards each other to squeeze and / or stretch the air storage bag 14. The retracting air bag 16 is communicated with the air storage bag 14 through an air duct.

[0023] The specific implementation process is as follows: As Figure 3 and Figure 4 shown, when using this retractor, first start the motor 2 to make the ends of the first retracting arm 5 and the second retracting arm 6 connected to the retracting members 8 as close as possible, so that the pair of baffles 10 are folded as much as possible to facilitate placing them inside the surgical incision; then place or fix the base 1 on a reference surface, and make the vertical plane and the horizontal plane of the inner side of the retracting member 8 abut against the side wall and the inner horizontal plane of the surgical incision respectively; as Figure 5 and Figure 6As shown, the motor 2 is started again, so that the paired retractors 8 move away from each other to retract the surgical opening.

[0024] When the motor 2 runs, the first retracting arm 5 and the second retracting arm 6 move towards each other (move away from or close to each other) under the action of the bidirectional lead screw 3, the slider 4, the guiding block 17 and the base 1. When it is necessary to retract the surgical opening, the first retracting arm 5 and the second retracting arm 6 move away from each other, and the retracting airbag 16 abuts against the skin and muscle tissue at the position of the surgical opening. The retracting process is stable, and the retracting distance or the fixed state is stable; and when the pair of retractors 8 move away from each other to retract the surgical opening, the pair of pressing members 12 move closer to each other to squeeze the air storage bag 14, and squeeze the gas in the air storage bag 14 into the retracting airbag 16, so that it inflates and expands. The inflated retracting airbag 16 is in flexible contact with the surgical opening tissue, reducing the damage to the surgical opening tissue during the retracting process.

[0025] The air storage bag 14 is a self-restoring airbag. When the air storage bag 14 is squeezed, the gas inside it transfers to the side of the retracting airbag 16, so that the retracting airbag 16 is in a full state and is in flexible contact with the surgical opening tissue; when the air storage bag 14 is pulled, the gas in the retracting airbag 16 transfers to the side of the air storage bag 14, facilitating the separation of the retracting airbag 16 from the surgical opening tissue. A connecting shaft 13 is arranged between the pair of pressing members 12, and the air storage bag 14 is slidably sleeved outside the connecting shaft 13, so that the squeezing and / or pulling effect of the pair of pressing members 12 on the air storage bag 14 is good. Limiting plates 15 are connected to both ends of the connecting shaft 13, which is convenient for the disassembly, debugging, replacement, etc. of the air storage bag 14, and can also limit the relative position of the pressing member 12 and the connecting shaft 13, avoiding excessive pulling of the air storage bag 14 by the pair of pressing members 12 or the pressing member 12 slipping off the connecting shaft 13.

[0026] The retractor 8 is set in an "L" shape, so that the contact effect between the retractor 8 and the skin and muscle tissue of the surgical opening is good, avoiding the wanton dispersion of the skin and muscle tissue from affecting the surgical opening vision; the retracting airbag 16 is connected to both the vertical plane and the horizontal plane on the inner side of the "L" shape of the retractor 8, so that both the inner horizontal plane and the vertical plane of the skin and muscle tissue at the position of the surgical opening are in contact with the retracting airbag 16, further reducing the damage to the tissue at this place.

[0027] Chute grooves 7 are provided on the first retractor arm 5 and the second retractor arm 6, and other retractor members 8 are connected by means of the chute grooves 7. Multiple retractor members 8 abut against the skin and muscle tissues at different positions of the surgical incision, so as to improve the retraction effect on the surgical incision. A through groove is provided on the first retractor arm 5, and the second retractor arm 6 slidably penetrates through the through groove. The first retractor arm 5 and the second retractor arm 6 are independent of each other and will not interfere with each other, so that the retractor members 8 or the pressing members 12 connected to the first retractor arm 5 and the second retractor arm 6 can be arranged in pairs. One side of a pair of retractor members 8 that are close to each other is rotatably connected to a baffle 10, and the two baffles 10 are rotatably connected by a connecting rod 11. When the first retractor arm 5 and the second retractor arm 6 approach each other, the two baffles 10 are folded and stored. When the first retractor arm 5 and the second retractor arm 6 move away from each other to retract the surgical incision, the two baffles 10 open, and the skin and muscle tissues between them are pushed outwards. The entire retractor forms a closed-loop frame to reduce the influence of the skin and muscle tissues on the surgical field. The slider 4 is connected to the retractor arm through a guiding block 17. The guiding block 17 guides and limits the movement of the slider 4 and / or the retractor arm relative to the base 1, so as to improve the smoothness and functionality of the relative movement (between the slider 4 and / or the retractor arm and the base 1). The end face of the base 1 slidably abuts against the end faces of the first retractor arm 5 and the second retractor arm 6. The pressing member 12 is connected to the end face where the first retractor arm 5 and / or the second retractor arm slidably abuts against the base 1, so that the base 1 and the pressing member 12 are completely on the same side (either on the upper side or on the lower side) of the retractor arms (the first retractor arm 5 and the second retractor arm), facilitating the placement or fixation of the entire retractor during the process of retracting the surgical incision.

[0028] The above are only embodiments of the present invention, and specific technical solutions or common knowledge such as well-known characteristics in the solutions are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solutions of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A neurosurgery retractor, characterized in that: It includes a base, which is connected to a motor. The output shaft of the motor is fixedly connected to a bidirectional screw rod rotatably connected to the base. The bidirectional screw rod is threadedly connected to a pair of sliders moving toward each other, and the sliders are slidably arranged on the inner side of the base; the pair of sliders are respectively connected to a first retraction arm and a second retraction arm, and the first retraction arm and the second retraction arm are cross-arranged, the first retraction arm and the second retraction arm are both connected to a retraction member and a pressing member, the retraction member and the pressing member are respectively arranged at the two ends of the first retraction arm and / or the second retraction arm, and the relative movement direction of the pair of retraction members and the pair of pressing members is opposite; an air bag is arranged between the pair of pressing members, and the pair of pressing members move toward each other to squeeze and / or pull the air bag; the side of a pair of retraction members away from each other is connected to a retraction air bag, and the retraction air bag is connected to the air bag through an air duct.

2. A neurosurgery retractor according to claim 1, characterized in that: The air storage bag is a self-restoring air bag, and the end surfaces of a pair of pressing members close to each other are respectively connected to the left and right end surfaces of the air storage bag.

3. A neurosurgery retractor according to claim 2, characterized in that: A connecting shaft is arranged between the pair of pressing members, the air storage bag is slidingly sleeved on the outside of the connecting shaft, and the pressing member is slidably connected to the connecting shaft.

4. A neurosurgery retractor according to claim 3, characterized in that: Both ends of the connecting shaft are detachably connected to limit plates, and the diameter of the limit plates is greater than the diameter of the connecting shaft.

5. A neurosurgery retractor according to claim 2, characterized in that: The retractor is in an "L" shape, and the inner side of the "L" shape is the side that contacts the skin and flesh tissue.

6. A neurosurgery retractor according to claim 5, characterized in that: The "L"-shaped inner vertical plane and horizontal plane of the retractor are both connected to the retractor airbag.

7. A neurosurgery retractor according to claim 1, characterized in that: The first retracting arm and the second retracting arm are both provided with a sliding groove, and the sliding groove is slidably connected with a plurality of the retracting members, and the plurality of the retracting members are all connected with a locking member for locking them with the first retracting arm and / or the second retracting arm.

8. The neurosurgery retractor according to claim 1, characterized in that: The first pulling arm is provided with a through slot, and the second pulling arm is slidably arranged through the through slot.

9. The neurosurgery retractor according to claim 1, characterized in that: The sides of the pair of pulling members close to each other are respectively rotatably connected with baffles, and the pair of baffles are rotatably connected through a connecting rod.

10. The neurosurgery retractor according to claim 1, characterized in that: A pair of sliders are respectively fixedly connected with guide blocks, the first retraction arm and the second retraction arm are respectively connected with the pair of guide blocks, and the guide blocks are slidably penetrated through the base; the end surface of the base is slidably abutted against the end surfaces of the first retraction arm and the second retraction arm, and the pressing piece is connected to the end surfaces of the first retraction arm and / or the second retraction arm that are slidably abutted against the base.

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