Minimally invasive laminar distraction device for cervical spine

Abstract

The present application relates to the technical field of medical equipment, and discloses a cervical vertebra minimally invasive lamina distraction device, which comprises a handle, and a booster cavity is formed in the handle. Through the transmission and positioning assembly, after holding the handle with one hand, repeatedly pressing the pressing plate with the big thumb can make the piston rod slide in the booster cavity, increase the pressure, drive the resistance plate to open, and after opening, the clamping column and the driving gear are clamped and fixed in position. This not only simplifies the operation and saves time, but also accurately controls the opening force, solves the problem that the lamina distraction forceps are difficult to finely adjust in a small space, improves the success rate and safety of the operation, and when the operation is completed, the big thumb presses the pressing disc, the long groove is in negative pressure, the clamping rod is retracted, the piston rod slides down and the resistance plate contracts with the help of the limiting spring, so that the device is quickly taken out. This process greatly shortens the operation time, reduces the operation difficulty of the doctor and the operation risk of the patient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical equipment, in particular to a cervical vertebra minimally invasive lamina distraction device. BACKGROUND

[0002] The posterior cervical vertebra single-door, laminoplasty is a common surgical method for treating multi-segment cervical disc herniation and spinal cord type cervical spondylosis. It makes an incision in the center of the neck, cuts off one side of the cervical vertebra lamina, lifts the lamina backward, expands the cervical vertebra canal, and makes the compressed spinal cord drift backward to relieve the compression of the spinal cord, thereby relieving symptoms such as unsteady walking, numbness of hands and feet, weakness of hands and feet, and neck pain. However, this surgical method can cause atrophy of the posterior cervical muscle group due to extensive muscle stripping, affecting the functional recovery and appearance of the patient. With the popularization of the concept of minimally invasive spine surgery, the domestic market has begun to use minimally invasive or endoscopic techniques to strip a small amount of muscle, precisely remove the lamina, and effectively distract, thereby achieving the purpose of expanding the cervical spinal canal.

[0003] During the operation, the distraction forceps is a commonly used distraction device. The lamina distraction forceps is composed of a fixed forceps rod and a movable forceps rod that are hingedly connected. The fixed forceps rod includes a hand-held portion and a fixed distraction section. The movable forceps rod is provided with a limiting portion and a telescopic distraction section. The top ends of the two are provided with distraction plates. There is a return spring between the limiting portion and the hand-held portion. During the operation, the doctor holds the movable forceps rod to rotate and achieve lamina distraction. After the telescopic distraction section is extended, the distraction plate can tightly fit with the lamina door side to prevent slipping. The limiting portion precisely controls the stroke of the movable forceps rod to ensure appropriate distraction. However, its disadvantages are also obvious. In the narrow and complex cervical vertebra minimally invasive surgery space, the manual rotation of the movable forceps rod to distract the lamina has poor flexibility. When fine-tuning the distraction angle or position, it is difficult to make fine adjustments due to the structure of the forceps rod, which affects the accuracy of the operation. During the long operation, the distraction forceps is easily displaced or loosened due to the vibration of the operation, which changes the distraction degree or causes damage to the surrounding nerve tissue, affecting the operation effect and progress.

[0004] Therefore, the cervical vertebra minimally invasive lamina distraction device is provided by those skilled in the art to solve the problems raised in the background. SUMMARY

[0005] (I) Technical problems to be solved

[0006] In view of the deficiencies of the prior art, the cervical vertebra minimally invasive lamina distraction device is provided to solve the problems in the current cervical vertebra minimally invasive surgery. The conventional lamina distraction forceps is inconvenient to use, affects the surgical field, has poor operation flexibility, is difficult to fine-tune, and is prone to insufficient or excessive lamina distraction during the operation, which leads to collapse of the contralateral lamina and incomplete relief of neurological symptoms or damage to the nerve tissue.

[0007] (II) Technical solutions

[0008] In order to achieve the above object, the present application provides the following technical scheme: cervical vertebra minimally invasive lamina distraction device, including handle, the inside of the handle is provided with a booster chamber, the inside of the booster chamber is fixedly connected with a limiting column, the outer surface of the limiting column is slidably connected with a piston rod, the inside bottom of the booster chamber is fixedly connected with a silica gel ring, the top of the handle is fixedly connected with a plug connector which is connected with the inside of the booster chamber, the outer surface of the plug connector is fixedly sleeved with a hose, the outer surface of the plug connector is fixedly installed with a pressure gauge, one end of the hose away from the plug connector is installed with an opening assembly, the inside of the handle is installed with a transmission assembly, the inside of the handle is rotatably connected with a rotating rod through a locating bearing, the end of the rotating rod is fixedly connected with a driven gear, the connecting part of the top of the rotating rod and the handle is installed with a positioning assembly, the inside of the handle is provided with a rotating groove, the inside of the rotating groove is rotatably connected with a pressing plate, the inside of the rotating groove is fixedly connected with a first reset spring, the end surface of the first reset spring is fixedly connected with the surface of the pressing plate, the surface of the pressing plate is fixedly connected with a ratchet wheel, the inside of the booster chamber is movably installed with a limiting spring, the inside of the handle is installed with a negative pressure assembly.

[0009] Preferably, the transmission assembly includes a rotating rod inserted in the center of the piston rod, the outer surface of the rotating rod is fixedly installed with a fixed bearing at the top end, the outer surface of the rotating rod is fixedly sleeved with a gear ring and a sealing ring, the inside of the handle is provided with a communication groove, the inside of the handle is fixedly connected with a communication pipe which is connected with the inside of the communication groove, the outer surfaces of the gear ring and the driven gear are meshingly installed with a tooth belt.

[0010] Preferably, the inside of the rotating rod is provided with a long groove, the inside of the long groove is sealingly slidably connected with a rubber sealing disc, the surface of the rubber sealing disc is fixedly connected with a clamping rod, the inside of the rotating rod is fixedly connected with an air pipe which is connected with the inside of the long groove, the center of the inside of the piston rod is provided with a threaded groove, the inside of the piston rod is provided with a positioning groove on both sides of the threaded groove.

[0011] Preferably, the positioning assembly includes a transition gear fixedly connected with the top end of the rotating rod, the inside of the handle is rotatably connected with a driving gear, the surface of the driving gear is fixedly connected with a driving gear plate, the surface of the driving gear plate is meshingly connected with the surface of the transition gear, the surface of the driving gear is meshingly connected with the surface of the ratchet wheel, the inside of the handle is fixedly connected with a square column, equidistantly provided with clamping holes on the surface of the square column, the outer surface of the square column is slidably connected with a positioning plate, the side surface of the positioning plate is fixedly connected with a sliding plate, the top of the positioning plate is fixedly connected with a clamping column.

[0012] Preferably, the material of the driving gear is rubber, the top of the clamping column is clamped on the surface of the driving gear, the outer surface of the limiting column is inserted into the inside of the positioning groove, a square groove matched with the square column is vertically arranged at the surface center of the positioning plate, the inside of the positioning plate movably installs the silica gel block and the steel ball, the surface of the steel ball abuts against the surface of the silica gel block, the surface of the steel ball away from the silica gel block extends into the inside of the square groove, and the surface of the steel ball is clamped in the inside of the clamping hole.

[0013] Preferably, the negative pressure assembly comprises a circular groove arranged in the inside of the handle, the inside of the communication groove is communicated with the right end of the inside of the circular groove through the communication pipe, the inside of the circular groove is sealingly and slidably connected with the sealing disc, the surface center of the sealing disc is fixedly connected with the sealing rod, the end surface of the sealing rod is fixedly connected with the pressure plate, the inside of the handle is fixedly connected with the air release pipe, and the inside of the circular groove movably installs the second reset spring.

[0014] Preferably, the left end of the inside of the circular groove is communicated with the outside of the handle through the air release pipe, and the outer surface of the sealing rod is sealingly and slidably connected in the inside of the handle.

[0015] Preferably, the outer surface of the clamping rod is inserted into the inside of the threaded groove, and the inside of the long groove is communicated with the inside of the communication groove through the air passing pipe.

[0016] Preferably, the opening assembly comprises a fixed seat fixedly connected to the end surface of the hose, a sealing groove is arranged in the inside of the fixed seat, a sealing plate is sealingly and slidably connected in the inside of the sealing groove, a connecting rod is fixedly connected to the surface center of the sealing plate, a sleeve is fixedly connected to the outer surface of the connecting rod, rotating plates are rotatably connected to the outer surface of the sleeve on both sides, a sliding column is slidably connected in the inside of the fixed seat, the surface of the rotating plate is rotatably connected to the surface of the sliding column, an abutting plate is fixedly connected to the end surface of the sliding column, a limiting groove is arranged in the inside of the fixed seat, and a limiting block is slidably connected in the inside of the limiting groove.

[0017] Preferably, the limiting groove and the limiting block are square, the end surface of the connecting rod away from the sealing plate is fixedly connected to the surface of the limiting block, the outer surface of the connecting rod is non-sealingly and slidably connected in the inside of the fixed seat, the surface of the abutting plate is arc-shaped, the input end of the pressure gauge is communicated with the inside of the plug connector, and the inside of the pressure boosting cavity is communicated with the inside of the sealing groove through the plug connector and the hose.

[0018] (Three) beneficial effects

[0019] Compared with the prior art, the present application provides a cervical vertebra minimally invasive lamina distraction device, which has the following beneficial effects:

[0020] 1. The cervical spine minimally invasive lamina distraction device, by setting the transmission assembly and positioning assembly, when in use, after holding the handle with one hand, only need to press the pressing plate repeatedly with the thumb, can drive the piston rod to slide upwards in the booster cavity, and pressurize the inside of the sealing groove, make the resistance plate slide away from the fixed seat, can open the specified position, and after opening, through the clamping of the clamping column and the drive gear, the opening position of the resistance plate can be fixed, the opening degree and extent can be more accurately controlled, compared with the problem that the lamina distraction forceps is difficult to adjust finely in a small space, this design can realize more accurate opening operation, meet the high-precision requirement of lamina distraction in minimally invasive surgery, is beneficial to improve the success rate and safety of surgery, greatly simplifies the operation process, reduces the complexity of the doctor's hand operation, and can complete the lamina distraction more quickly in the surgery, saves the valuable operation time.

[0021] 2. The cervical spine minimally invasive lamina distraction device, by setting the communication groove, the communication pipe and the negative pressure assembly, when the operation is completed and the distraction device needs to be taken out, only need to press the pressure disc with the thumb, the inside of the long groove is in a negative pressure state, and the clamping rod is retracted, when the clamping rod is not connected with the inside of the threaded groove, the elasticity of the limiting spring makes the piston rod slide down quickly, the sealing plate slides towards the hose, and the two resistance plates contract quickly, which can facilitate the quick removal of the opening assembly and the hose. This efficient removal method also greatly shortens the time of the operation ending stage, which is beneficial to reduce the overall operation time of the patient and reduce the risk of surgery. Compared with the complex multi-step operation of the traditional distraction device, the operation difficulty and burden of the doctor in the later stage of the operation are greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure diagram of the cervical spine minimally invasive lamina distraction device is provided.

[0023] Figure 2 The cross-sectional view of the handle of the cervical spine minimally invasive lamina distraction device is provided.

[0024] Figure 3 The enlarged view of A in the cervical spine minimally invasive lamina distraction device is provided. Figure 2

[0025] Figure 4 The enlarged view of B in the cervical spine minimally invasive lamina distraction device is provided. Figure 2

[0026] Figure 5 The cross-sectional view of the positioning plate of the cervical spine minimally invasive lamina distraction device is provided.

[0027] Figure 6 The enlarged view of C in the cervical spine minimally invasive lamina distraction device is provided. Figure 2

[0028] Figure 7 ​​​A cross-sectional view of the piston rod in the cervical vertebra minimally invasive lamina distraction device according to the present application;

[0029] Figure 8 A cross-sectional view of the rotating rod in the cervical vertebra minimally invasive lamina distraction device according to the present application;

[0030] Figure 9 A structural schematic view of the opening assembly in the cervical vertebra minimally invasive lamina distraction device according to the present application;

[0031] Figure 10 A connecting schematic view of the fixing seat and the resisting plate in the cervical vertebra minimally invasive lamina distraction device according to the present application.

[0032] In the figure: 1, handle; 2, pressure boosting cavity; 3, limiting column; 4, piston rod; 41, positioning groove; 42, threaded groove; 5, silica gel ring; 6, plug; 7, pressure gauge; 8, hose; 9, opening assembly; 91, fixing seat; 92, sealing groove; 93, sealing plate; 94, connecting rod; 95, sleeve; 96, rotating plate; 97, sliding column; 98, resisting plate; 99, limiting groove; 910, limiting block; 10, driven gear; 11, rotating rod; 12, transmission assembly; 121, fixed bearing; 122, rotating rod; 1221, clamping rod; 1222, rubber sealing disc; 1223, long groove; 1224, air passage; 123, tooth ring; 124, tooth belt; 125, communication groove; 126, sealing ring; 127, communication pipe; 13, positioning assembly; 131, transition gear; 132, driving tooth disc; 133, driving gear; 134, square column; 135, clamping hole; 136, positioning plate; 1361, square groove; 1362, silica gel block; 1363, steel ball; 137, sliding plate; 138, clamping column; 14, rotating groove; 141, first return spring; 15, pressing plate; 16, ratchet; 17, limiting spring; 18, negative pressure assembly; 181, circular groove; 182, air release pipe; 183, sealing disc; 184, sealing rod; 185, pressure disc; 186, second return spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present application, instead of all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the present application.

[0034] Please refer to Figures 1-10, cervical vertebra minimally invasive lamina distraction device, including handle 1, the inside of handle 1 is provided with booster chamber 2, booster chamber 2 is fixedly connected with limiting column 3 in the inside, the outer surface of limiting column 3 is slidably connected with piston rod 4, the inside bottom of booster chamber 2 is fixedly connected with silica gel ring 5, the top of handle 1 is fixedly connected with plug-in head 6, which is communicated with the inside of booster chamber 2, the outer surface of plug-in head 6 is fixedly sleeved with hose 8, the outer surface of plug-in head 6 is fixedly installed with pressure gauge 7, one end of hose 8 away from plug-in head 6 is installed with opening assembly 9, the inside of handle 1 is installed with transmission assembly 12, transmission assembly 12 includes rotating rod 122 inserted in the inside center of piston rod 4, the outer surface top of rotating rod 122 is fixedly installed with fixed bearing 121, the outer surface of rotating rod 122 is fixedly sleeved with gear ring 123 and sealing ring 126, the inside of handle 1 is provided with communication groove 125, the inside of handle 1 is fixedly connected with communication pipe 127, which is communicated with the inside of communication groove 125, the outer surface of gear ring 123 and driven gear 10 is meshingly installed with toothed belt 124, the inside of handle 1 is rotatably connected with rotating rod 11 through locating bearing, the end of rotating rod 11 is fixedly connected with driven gear 10, the connecting place of the top of rotating rod 11 and handle 1 is installed with positioning assembly 13, positioning assembly 13 includes transition gear 131 fixedly connected with the top of rotating rod 11, the inside of handle 1 is rotatably connected with driving gear 133, the surface of driving gear 133 is fixedly connected with driving toothed disc 132, the surface of driving toothed disc 132 is meshingly connected with the surface of transition gear 131, the surface of driving gear 133 is meshingly connected with the surface of ratchet wheel 16, the inside of handle 1 is fixedly connected with square column 134, the surface of square column 134 is equidistantly provided with clamping hole 135, the outer surface of square column 134 is slidably connected with positioning plate 136, the side of positioning plate 136 is fixedly connected with sliding plate 137, the top of positioning plate 136 is fixedly connected with clamping column 138, the inside of handle 1 is provided with rotating groove 14, the inside of rotating groove 14 is rotatably connected with pressing plate 15, the inside of rotating groove 14 is fixedly connected with first return spring 141, the end surface of first return spring 141 is fixedly connected with the surface of pressing plate 15, the surface of pressing plate 15 is fixedly connected with ratchet wheel 16, the inside of booster chamber 2 is movably installed with limiting spring 17, the inside of handle 1 is installed with negative pressure assembly 18, by setting transmission assembly 12 and positioning assembly 13, when using, after holding handle 1 with one hand, only need to press pressing plate 15 repeatedly with thumb, piston rod 4 can slide upward in booster chamber 2, the inside of sealing groove 92 is pressurized, resistance plate 98 slides away from fixed seat 91, the specified position can be distracted, after distraction, through the clamping of clamping column 138 and driving gear 133, the opening position of resistance plate 98 can be fixed, the distraction force and degree can be more accurately controlled, compared with the problem that lamina distraction forceps are difficult to fine adjust in narrow space, this design can realize more accurate distraction operation, meet the high-precision requirement of cervical vertebra minimally invasive surgery, be favorable to improve the success rate and safety of surgery,The operation process is greatly simplified, the complexity of the doctor's hand operation is reduced, the vertebral plate distraction can be completed more quickly in the operation, and the valuable operation time is saved.

[0035] The inside of the rotating rod 122 is provided with a long slot 1223, the inside of the long slot 1223 is sealingly and slidably connected with a rubber sealing disc 1222, the surface of the rubber sealing disc 1222 is fixedly connected with a clamping rod 1221, the inside of the rotating rod 122 is fixedly connected with a gas passing pipe 1224 which is in communication with the inside of the long slot 1223, the inside of the piston rod 4 is provided with a threaded groove 42 at the center, the inside of the piston rod 4 is provided with a positioning groove 41 on both sides of the threaded groove 42, by setting the slidable structure of the clamping rod 1221, when the clamping rod 1221 is not connected with the inside of the threaded groove 42, the piston rod 4 automatically slides down by the elasticity of the limiting spring 17, and when the clamping rod 1221 extends to the outside of the rotating rod 122, the piston rod 4 can slide up and down by the engagement of the clamping rod 1221 and the threaded groove 42, and the piston rod 4 slides up and down outside the limiting column 3 through the positioning groove 4.

[0036] The material of the driving gear 133 is rubber, the top of the clamping column 138 is clamped on the surface of the driving gear 133, the outer surface of the limiting column 3 is inserted into the inside of the positioning groove 41, the surface center of the positioning plate 136 is provided with a square groove 1361 which is matched with the square column 134, the inside of the positioning plate 136 movably installs a silica gel block 1362 and a steel ball 1363, the surface of the steel ball 1363 abuts against the surface of the silica gel block 1362, the surface of the steel ball 1363 extending to the inside of the square groove 1361 away from the surface of the silica gel block 1362, the surface of the steel ball 1363 is clamped in the inside of the clamping hole 135, because the material of the driving gear 133 is rubber, the engagement of the ratchet wheel 16, when the ratchet wheel 16 rotates counterclockwise, the ratchet wheel 16 will not drive the driving gear 133 to rotate.

[0037] The negative pressure assembly 18 comprises a circular groove 181 formed in the interior of the handle 1, the interior of the communication groove 125 is connected with the right end of the interior of the circular groove 181 through the communication pipe 127, the interior of the circular groove 181 is sealingly and slidably connected with a sealing disc 183, the surface center of the sealing disc 183 is fixedly connected with a sealing rod 184, the end surface of the sealing rod 184 is fixedly connected with a pressure disc 185, the interior of the handle 1 is fixedly connected with a gas release pipe 182, the interior of the circular groove 181 is movably connected with a second reset spring 186, by arranging the communication groove 125, the communication pipe 127 and the negative pressure assembly 18, when the expansion device needs to be taken out after the operation is completed, only the thumb is pressed on the pressure disc 185, the interior of the long groove 1223 can be in a negative pressure state, and the clamping rod 1221 can be retracted, when the clamping rod 1221 is not connected with the interior of the threaded groove 42, the piston rod 4 can quickly slide downwardly through the elasticity of the limiting spring 17, the sealing plate 93 can slide to the direction of the hose 8, and the two abutting plates 98 can quickly retract, so that the opening assembly 9 and the hose 8 can be quickly taken out, this efficient taking-out mode greatly shortens the time of the operation finishing stage, is favorable for reducing the overall operation time of the patient, reduces the operation risk, and greatly reduces the operation difficulty and burden of the doctor in the post-operation stage compared with the complicated operation of the traditional expansion device.

[0038] The left end of the interior of the circular groove 181 is connected with the exterior of the handle 1 through the gas release pipe 182, and the outer surface of the sealing rod 184 is sealingly and slidably connected in the interior of the handle 1, so that the air tightness of the right end of the interior of the circular groove 181 can be ensured.

[0039] The outer surface of the clamping rod 1221 is inserted into the interior of the threaded groove 42, and the interior of the long groove 1223 is connected with the interior of the communication groove 125 through the air passage pipe 1224.

[0040] The opening assembly 9 comprises a fixed seat 91 fixedly connected to the end surface of the hose 8, the interior of the fixed seat 91 is formed with a sealing groove 92, the interior of the sealing groove 92 is sealingly and slidably connected with a sealing plate 93, the surface center of the sealing plate 93 is fixedly connected with a connecting rod 94, the outer surface of the connecting rod 94 is fixedly connected with a sleeve 95, both sides of the outer surface of the sleeve 95 are rotatably connected with rotating plates 96, the interior of the fixed seat 91 is slidably connected with a sliding column 97, the surface of the rotating plate 96 is rotatably connected to the surface of the sliding column 97, the end surface of the sliding column 97 is fixedly connected with abutting plates 98, the interior of the fixed seat 91 is formed with a limiting groove 99, and the interior of the limiting groove 99 is slidably connected with a limiting block 910, by arranging the opening assembly 9, the opening and closing action of the abutting plates 98 can be realized through the air pressure change in the sealing groove 92.

[0041] The limiting groove 99 and the limiting block 910 are square, the end of the connecting rod 94 away from the sealing plate 93 is fixedly connected to the surface of the limiting block 910, the outer surface of the connecting rod 94 is non-sealingly and slidably connected to the inside of the fixed seat 91, the surface of the resisting plate 98 is arc-shaped, the input end of the pressure gauge 7 is connected with the inside of the plug-in connector 6, the inside of the pressure boosting cavity 2 is connected with the inside of the sealing groove 92 through the plug-in connector 6 and the hose 8, and since the limiting groove 99 and the limiting block 910 are square, the rotation of the connecting rod 94 can be avoided.

[0042] In summary, the cervical vertebra minimally invasive lamina distraction device can place the opening assembly 9 at the specified position through the hose 8 when placed, then slide the sliding plate 137 downward, the sliding plate 137 drives the clamping column 138 to slide downward through the positioning plate 136, at this time the drive gear 133 can rotate, when used, after holding the handle 1 with one hand, repeatedly press the pressing plate 15 with the thumb, since the ratchet 16 is engaged with the drive gear 133, when the pressing plate 15 rotates into the rotating groove 14, the ratchet 16 can drive the drive gear 133 to rotate, then reset the rotation of the pressing plate 15 through the elasticity of the first reset spring 141, at this time the ratchet 16 cannot drive the drive gear 133 to rotate, when the drive gear 133 rotates, drive the rotating rod 11 to rotate through the drive gear disc 132 and the transition gear 131, drive the rotating rod 122 to rotate through the driven gear 10, the toothed belt 124 and the toothed ring 123, drive the clamping rod 1221 to rotate in the threaded groove 42, and drive the piston rod 4 to slide upward, and pressurize the inside of the sealing groove 92 through the pressure boosting cavity 2, the plug-in connector 6 and the hose 8, at this time the sealing plate 93 drives the connecting rod 94 to slide, and drives the resisting plate 98 to slide away from the fixed seat 91 through the rotation of the rotating plate 96 and the sliding column 97, so that the specified position can be distracted, after distraction, slide the sliding plate 137 upward, the clamping column 138 is clamped with the drive gear 133, at this time the surface of the steel ball 1363 is clamped in the uppermost clamping hole 135 of the square column 134, so that the opening position of the resisting plate 98 can be fixed, and the distraction force and degree can be more accurately controlled, compared with the problem that the lamina distraction forceps are difficult to finely adjust in a small space, this design can realize more accurate distraction operation, meet the high-precision requirement of cervical vertebra minimally invasive surgery, is beneficial to improve the success rate and safety of surgery, greatly simplifies the operation process, reduces the complexity of the doctor's hand operation, and can more quickly complete the lamina distraction in the surgery, saves valuable surgery time.

[0043] When the support device needs to be taken out after the operation is completed, only the thumb is pressed on the pressure plate 185, at this time the right end of the circular groove 181 is in a negative pressure state, and through the communication pipe 127, the long groove 1223 inside is in a negative pressure state, and the clamping rod 1221 is retracted, when the clamping rod 1221 is not connected with the inside of the threaded groove 42, through the elasticity of the limiting spring 17, the piston rod 4 quickly slides down, after the piston rod 4 slides down, the top of the pressure chamber 2 is in a negative pressure state, and the top of the sealing groove 92 is in a negative pressure state, the sealing plate 93 drives the sleeve 95 to slide through the connecting rod 94, the sleeve 95 drives the rotating plate 96 to rotate, so that the two resistance plates 98 quickly contract, which can facilitate the quick taking out of the opening assembly 9 and the hose 8. This efficient taking out method greatly shortens the time of the operation finishing stage, is conducive to reducing the overall operation time of the patient, reduces the operation risk, compared with the complex multi-step operation of the traditional support device taking out, greatly reduces the operation difficulty and burden of the doctor in the late stage of the operation.

[0044] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, alternatives and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A minimally invasive cervical laminar spondylolisthesis device, comprising a handle (1), characterized in that: The handle (1) has a pressure chamber (2) inside, and a limiting post (3) is fixedly connected inside the pressure chamber (2). A piston rod (4) is slidably connected to the outer surface of the limiting post (3). A silicone ring (5) is fixedly connected to the bottom of the pressure chamber (2). A connector (6) communicating with the inside of the pressure chamber (2) is fixedly connected to the top of the handle (1). A hose (8) is fixedly sleeved on the outer surface of the connector (6). A pressure gauge (7) is fixedly installed on the outer surface of the connector (6). An opening component (9) is installed at the end of the hose (8) away from the connector (6). A transmission component (12) is installed inside the handle (1). The handle (1) rotates through a positioning bearing. A rotating rod (11) is connected to the handle (1). A driven gear (10) is fixedly connected to the end of the rotating rod (11). A positioning component (13) is installed at the connection between the top of the rotating rod (11) and the handle (1). A rotating groove (14) is opened inside the handle (1). A pressure plate (15) is rotatably connected inside the rotating groove (14). A first return spring (141) is fixedly connected inside the rotating groove (14). The end face of the first return spring (141) is fixedly connected to the surface of the pressure plate (15). A ratchet (16) is fixedly connected to the surface of the pressure plate (15). A limit spring (17) is movably installed inside the pressure chamber (2). A negative pressure component (18) is installed inside the handle (1). The transmission assembly (12) includes a rotating rod (122) inserted into the center of the piston rod (4). A fixed bearing (121) is fixedly installed on the top of the outer surface of the rotating rod (122). A toothed ring (123) and a sealing ring (126) are fixedly sleeved on the outer surface of the rotating rod (122). A connecting groove (125) is opened inside the handle (1). A connecting pipe (127) is fixedly connected inside the handle (1) and communicates with the inside of the connecting groove (125). A toothed belt (124) is meshed on the outer surface of the toothed ring (123) and the driven gear (10). The rotating rod (122) has an internal long groove (1223), and a rubber sealing disc (1222) is slidably connected inside the long groove (1223). A locking rod (1221) is fixedly connected to the surface of the rubber sealing disc (1222). An air passage (1224) communicating with the inside of the long groove (1223) is fixedly connected inside the rotating rod (122). A threaded groove (42) is provided at the center of the piston rod (4). Positioning grooves (41) are provided on both sides of the threaded groove (42) inside the piston rod (4). The outer surface of the locking bar (1221) is inserted into the inside of the threaded groove (42), and the inside of the long groove (1223) is connected to the inside of the connecting groove (1225) through the air pipe (1224).

2. The cervical minimally invasive laminar sphincter distraction device according to claim 1, characterized in that: The positioning assembly (13) includes a transition gear (131) fixedly connected to the top of the rotating rod (11), a drive gear (133) rotatably connected inside the handle (1), a drive gear plate (132) fixedly connected to the surface of the drive gear (133), the surface of the drive gear plate (132) meshing with the surface of the transition gear (131), the surface of the drive gear (133) meshing with the surface of the ratchet (16), a square post (134) fixedly connected inside the handle (1), equidistant holes (135) on the surface of the square post (134), a positioning plate (136) slidably connected to the outer surface of the square post (134), a sliding plate (137) fixedly connected to the side of the positioning plate (136), and a locking post (138) fixedly connected to the top of the positioning plate (136).

3. The cervical minimally invasive laminar sphincter distraction device according to claim 2, characterized in that: The drive gear (133) is made of rubber. The top of the locking post (138) is engaged with the surface of the drive gear (133). The outer surface of the limiting post (3) is inserted into the interior of the positioning groove (41). A square groove (1361) matching the square post (134) is opened through the center of the surface of the positioning plate (136). A silicone block (1362) and a steel ball (1363) are movably installed inside the positioning plate (136). The surface of the steel ball (1363) abuts against the surface of the silicone block (1362). The steel ball (1363) extends away from the surface of the silicone block (1362) and into the interior of the square groove (1361). The surface of the steel ball (1363) is engaged with the interior of the locking hole (135).

4. The cervical minimally invasive laminar expansion device according to claim 1, characterized in that: The negative pressure assembly (18) includes a circular groove (181) inside the handle (1). The inside of the connecting groove (125) is connected to the right end of the inside of the circular groove (181) through a connecting pipe (127). A sealing disc (183) is slidably connected inside the circular groove (181). A sealing rod (184) is fixedly connected at the center of the surface of the sealing disc (183). A pressure plate (185) is fixedly connected to the end face of the sealing rod (184). A vent pipe (182) is fixedly connected inside the handle (1). A second return spring (186) is movably installed inside the circular groove (181).

5. The cervical minimally invasive laminar sphincter distraction device according to claim 4, characterized in that: The inner left end of the circular groove (181) is connected to the outside of the handle (1) through the vent pipe (182), and the outer surface of the sealing rod (184) is slidably connected to the inside of the handle (1).

6. The cervical minimally invasive laminar expansion device according to claim 1, characterized in that: The opening assembly (9) includes a fixed seat (91) fixedly connected to the end face of the hose (8). A sealing groove (92) is provided inside the fixed seat (91). A sealing plate (93) is slidably connected inside the sealing groove (92). A connecting rod (94) is fixedly connected to the center of the surface of the sealing plate (93). A sleeve (95) is fixedly connected to the outer surface of the connecting rod (94). Rotating plates (96) are rotatably connected to both sides of the outer surface of the sleeve (95). A sliding column (97) is slidably connected inside the fixed seat (91). The surface of the rotating plate (96) is rotatably connected to the surface of the sliding column (97). A stop plate (98) is fixedly connected to the end face of the sliding column (97). A limiting groove (99) is provided inside the fixed seat (91). A limiting block (910) is slidably connected inside the limiting groove (99).

7. The cervical minimally invasive laminar sphincter distraction device according to claim 6, characterized in that: The limiting groove (99) and the limiting block (910) are both square. The end face of the connecting rod (94) away from the sealing plate (93) is fixedly connected to the surface of the limiting block (910). The outer surface of the connecting rod (94) is non-sealed and slidably connected to the inside of the fixed seat (91). The surface of the abutment plate (98) is arc-shaped. The input end of the pressure gauge (7) is connected to the inside of the plug (6). The inside of the pressurizing chamber (2) is connected to the inside of the sealing groove (92) through the plug (6) and the hose (8).

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