CN107595377B - Device for adjusting distance between percutaneous pedicle screws - Google Patents
Device for adjusting distance between percutaneous pedicle screws Download PDFInfo
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- CN107595377B CN107595377B CN201710818741.4A CN201710818741A CN107595377B CN 107595377 B CN107595377 B CN 107595377B CN 201710818741 A CN201710818741 A CN 201710818741A CN 107595377 B CN107595377 B CN 107595377B
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Abstract
The invention discloses a device for adjusting the distance between percutaneous pedicle screws, which comprises: the force application clamp assembly is provided with a connecting end and a handle structure for driving the connecting end to be closed or opened; and the two abutting assemblies are in one-to-one correspondence with the two connecting ends respectively, each abutting assembly comprises a first abutting piece, a first connecting rod piece, a second connecting rod piece and a third connecting rod piece, one end of each first abutting piece is provided with a jaw, the other end of each first connecting rod piece is fixedly connected with one end of each first connecting rod piece, the other end of each first connecting rod piece is rotatably connected with one end of each second connecting rod piece and is provided with a first locking structure, the other end of each second connecting rod piece is rotatably connected with one end of each third connecting rod piece and is provided with a second locking structure, and the other end of each third connecting rod piece is rotatably connected with the connecting ends and is provided with a third locking structure. The distance adjusting device of the percutaneous pedicle screw can reliably and stably adjust the distance between two pedicle screws, and is convenient for screwing the screw to fix the connecting rod and the pedicle screw.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a device for adjusting the distance between percutaneous pedicle screws.
Background
Spinal minimally invasive surgery process: driving pedicle screws → inserting the connecting rod to the tail cap of the pedicle screws → adjusting the distance of the pedicle screws → screwing in locking screws, so that the connecting rod is locked with the pedicle screws, and the distance between the pedicle screws is fixed.
Because the positions of the vertebral pedicle between the vertebras are not on the same straight line and the same plane and are irregularly distributed in the three-dimensional space, the positions between the tail caps of the two vertebral pedicle screws which are driven into the vertebral column are not parallel and level. The traditional spreader used in the current clinical surgical operation can only meet the problem of angle adjustment on one plane, and cannot meet the angle adjustment on other planes. When the traditional spreader is used for adjusting the distance between the adjacent pedicle screws, the force application positions on the adjacent pedicle screws are not uniform, the technical requirement on the operation of a doctor is higher, and the operation difficulty is increased.
Disclosure of Invention
Therefore, the distance adjusting device for the percutaneous pedicle screws is needed to be provided, the distance between the two pedicle screws can be reliably and stably adjusted, the locking screws can be conveniently screwed down to fix the connecting rod and the pedicle screws, the dependence on the technical requirements of the operation of doctors is reduced, and the operation difficulty is reduced.
The technical scheme is as follows:
a percutaneous pedicle screw spacing adjustment device, comprising: the force application clamp assembly is provided with two connecting ends capable of moving relatively and a handle structure for driving the two connecting ends to be closed or opened; the two abutting assemblies correspond to the two connecting ends one to one respectively, each abutting assembly comprises a first abutting part, a first connecting rod piece, a second connecting rod piece and a third connecting rod piece, one end of the first abutting part is provided with a jaw, the other end of the first abutting part is connected with one end of the first connecting rod piece, the other end of the first connecting rod piece is rotatably connected with one end of the second connecting rod piece and is provided with a first locking structure, the other end of the second connecting rod piece is rotatably connected with one end of the third connecting rod piece and is provided with a second locking structure, and the other end of the third connecting rod piece is rotatably connected with the connecting ends and is provided with a third locking structure; when the first locking structure is released, the first connecting rod piece can rotate around the first axis; when the first locking structure is locked, the first connecting rod piece and the second connecting rod piece are fixed; when the second locking structure is released, the second connecting rod piece can rotate around the second axis; when the second locking structure is locked, the second connecting rod piece and the third connecting rod piece are fixed; when the third locking structure is released, the third connecting rod piece can rotate around a third axis; when the third locking structure is locked, the third connecting rod piece is fixed with the connecting end; the first axis, the second axis and the third axis are mutually vertical or approximately vertical pairwise.
In the spine orthopedic surgery, when the vertebral pedicle screws and the connecting rod are required to be used for expanding and extruding the laterally bent spine, the vertebral pedicle screws can be firstly driven into the spine, and the connecting rod is arranged on the tail caps of the two vertebral pedicle screws; then, the first pressing parts of the two pressing components correspond to a pedicle screw respectively by utilizing a percutaneous pedicle screw spacing adjusting device, at the moment, the first locking structure, the second locking structure and the third locking structure are loosened, the jaw of the first pressing part is adjusted along three dimensions (a first axis, a second axis and a third axis) to be pressed against the corresponding connecting rod and the pedicle screw, and then the first locking structure, the second locking structure and the third locking structure are screwed respectively to fix the first connecting rod piece and the second connecting rod piece, fix the second connecting rod piece and the third connecting rod piece and fix the third connecting rod piece and the connecting end; at last, the connecting end is driven to be opened through the handle structure, and then the distance between the two pedicle screws is expanded, or the connecting end is driven to be folded through the handle structure, and then the distance between the two pedicle screws is folded, the distance of the vertebral arch between the vertebras is adjusted through adjusting the distance of the pedicle screws, the distance required by the operation is met, and finally the locking screws are screwed up through the screwdriver, so that the two pedicle screws are all fixed with the connecting rod, and the effect of fixing the distance of the vertebral arch between the vertebras is achieved. According to the percutaneous pedicle screw spacing adjusting device, the jaw position of the first pressing part can be adjusted according to the position of the pedicle screw, the first pressing part is fixed after adjustment, the driving handle is unfolded or folded, force application is facilitated, the pedicle screw spacing adjustment is stable and reliable, the locking screw is conveniently screwed to fix the connecting rod and the pedicle screw, dependence on the technical requirements of the operation of a doctor is reduced, and the operation difficulty is reduced.
The technical solution is further explained below:
in one embodiment, the first pressing part is of a cylindrical structure and is provided with a first through hole penetrating through two ends of the first pressing part, two oppositely arranged limiting grooves are formed in the side wall of the first pressing part, the limiting grooves are in clearance fit with the connecting rod, the inner side walls of the limiting grooves are in pressing fit with the tail cap of the pedicle screw, and the two limiting grooves are matched with each other to form the jaw. Because of first press part is cylindric structure, and is equipped with the first through-hole that the bottle opener of being convenient for alternates, utilize simultaneously to set up two spacing grooves on cylindric first press part and form keeping silent, and then can embolia the pedicle of vertebral arch screw in the first through-hole, then utilize the inside wall of two spacing grooves to support the tail cap that presses the pedicle of vertebral arch screw, can realize strutting and the extrusion action, this spacing groove still can supply the connective bar to insert, avoid because of the interference effect of connective bar, lead to first press part can't support the press fit with the tail cap of pedicle of vertebral arch screw.
In one embodiment, the outer side wall of the first pressing part is provided with an auxiliary positioning groove which is arranged along the axial direction of the first pressing part and is spaced from the limiting groove, the central line of the auxiliary positioning groove and the central line of the limiting groove are on the same straight line, and the width of the auxiliary positioning groove is equal to the width of the limiting groove. And then utilize supplementary constant head tank to come the position of assistance-localization real-time spacing groove, the doctor of being convenient for judges the position that presss from both sides the groove, and the relevant operation of better implementation is operated, and the weight of first press part can be alleviateed in the setting of this supplementary constant head tank simultaneously, and when making the interval adjusting device who operates percutaneous pedicle of vertebral arch screw adjust the interval between two pedicle of vertebral arch screws, it is more steady, improve the operation success rate.
In one embodiment, the other end of the first pressing part is detachably and rotatably connected with the first connecting rod, and the first connecting rod is provided with a second through hole corresponding to the first through hole. And then the first pressing piece can be replaced according to the actual requirement to adapt to different operation requirements.
In one embodiment, the other end of the first link member is provided with a first mounting hole and at least two first connection holes arranged at intervals along the outer circumferential direction of the first mounting hole, one end of the second link member is provided with a first clamping groove rotationally matched with the other end of the first link member, a first rotating shaft fixedly arranged on the inner wall of the first clamping groove, and a first fastening member, the first rotating shaft is rotationally matched with the first mounting hole, so that the first link member can rotate around the axis of the first rotating shaft, and one end of the first fastening member penetrates through the side wall of the first clamping groove and is tightly matched with the first connection holes to form the first locking structure. The first connecting rod piece is rotatably connected with the second connecting rod piece, and the first connecting rod piece rotates along the axis of the first rotating shaft (namely the first axis) and is adjusted in angle with the second connecting rod piece; meanwhile, a first locking structure is formed by matching the first fastener with the first connecting hole, so that the first connecting rod piece and the second connecting rod piece are fixed.
In one embodiment, a second clamping groove and a second connecting hole penetrating through a side wall of the second clamping groove are formed in the other end of the second connecting rod piece, a connecting body rotationally matched with the second clamping groove and a second fastening piece arranged on the connecting body are arranged at one end of the third connecting rod piece, the second fastening piece and the second connecting hole are matched to form the second locking structure, and the second connecting rod piece can rotate around the axis of the second fastening piece. The second connecting rod piece is rotatably connected with the third connecting rod piece, and the second connecting rod piece rotates along the axis (namely a second axis) of the second fastening piece and is angularly adjusted with the third connecting rod piece; meanwhile, a second locking structure is formed by matching the second fastener with the second connecting hole, so that the second connecting rod piece and the third connecting rod piece are fixed.
In one embodiment, a rotating body is arranged at the other end of the third connecting rod piece, the third connecting rod piece can rotate around the axis of the rotating body, and the connecting end is provided with a third connecting hole in sleeve joint and rotating fit with the rotating body and a third fastening piece forming the third locking structure with the inner wall of the third connecting hole. The third connecting rod piece is rotatably connected with the connecting end, and the third connecting rod piece rotates along the axis of the rotating body (namely, the third axis) and is adjusted with the connecting end in an angle manner; and meanwhile, a third locking structure is formed by matching the third fastener with the third connecting hole, so that the third connecting rod piece and the connecting end are fixed.
In one embodiment, the first locking structure, the second locking structure, or/and the third locking structure includes a repositionable indexing pin and a pin hole that snap fits into a fastening end of the indexing pin. And then the fastening end of the indexing pin can be utilized to be fixedly matched with the resettable clamp of the pin hole to realize the loosening or locking of the first locking structure, the second locking structure and the third locking structure, so that the operation is convenient, the implementation is easy, and the operation efficiency is improved.
In one embodiment, the handle structure comprises a first handle and a second handle which are oppositely arranged, and an elastic part arranged between the first handle and the second handle, wherein the first handle is rotatably connected with the second handle and can drive the two connecting ends to close or open. The distance between the first handle and the second handle can be elastically and automatically reset, and meanwhile, the structures of the first handle and the second handle can be arranged according to requirements, for example, when the first handle and the second handle move oppositely, the two connecting ends are gradually folded; when the first handle and the second handle move in opposite directions, the two connecting ends are gradually opened. Or when the first handle and the second handle move oppositely, the two connecting ends are gradually opened; when the first handle and the second handle move in opposite directions, the two connecting ends are gradually folded.
In one embodiment, the handle structure further comprises a self-locking assembly, and the self-locking assembly comprises a rack rotatably arranged on the first handle and a clamping groove arranged on the second handle and matched with the clamping teeth of the rack in a clamping manner. And then utilize the auto-lock subassembly can realize that the shrink can all carry out the auto-lock when folding between first handle and the second handle, make and strut operation and extrusion operation all can auto-lock, improve the convenience of operation.
In one embodiment, the handle structure further comprises a self-locking component, the self-locking component comprises a limiting chuck telescopically arranged on the first handle and a self-locking piece arranged on the second handle, the self-locking piece is provided with a plurality of clamping holes arranged at intervals along the length direction of the self-locking piece, and the clamping holes are matched with the limiting chuck. And then utilize the auto-lock subassembly can realize that the shrink can all carry out the auto-lock when folding between first handle and the second handle, make and strut operation and extrusion operation all can auto-lock, improve the convenience of operation.
Drawings
FIG. 1 is an exploded view of the percutaneous pedicle screw spacing adjustment device according to the present invention;
fig. 2 is a schematic structural view of a first pressing member according to the present invention;
FIG. 3 is a schematic structural diagram of a first link according to the present invention;
FIG. 4 is a schematic structural view of a second link member according to the present invention;
FIG. 5 is a schematic structural view of a third link member according to the present invention;
FIG. 6 is a schematic structural view of a force applying clamp assembly according to the present invention;
FIG. 7 is a schematic structural view of a first embodiment of a percutaneous pedicle screw spacing adjustment device according to the invention;
fig. 8 is a schematic structural view of a second embodiment of the percutaneous pedicle screw spacing adjustment device according to the present invention.
Description of reference numerals:
100. force application clamp assembly, 110, connecting end, 112, third connecting hole, 114, third fastener, 120, handle structure, 122, first handle, 124, second handle, 126, elastic piece, 128, self-locking structure, 200, pressing assembly, 210, first pressing piece, 212, first through hole, 214, limiting groove, 216, auxiliary positioning groove, 218, weight reduction groove, 220, first connecting rod piece, 221, second through hole, 223, first mounting hole, 225, first connecting hole, 230, second connecting rod piece, 231, first clamping groove, 232, first rotating shaft, 233, first fastener, 234, second clamping groove, 235, second connecting hole, 240, third connecting rod piece, 242, connecting body, 244, second fastener, 246, rotating body, 250, first locking structure, 260, second locking structure, 270, third locking structure, 300, pedicle screw, 310, tail cap, 400, connecting rod, 500, pedicle screw, 400, connecting rod, 500, and the like, The spinal pedicle between vertebrae.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The terms "first" and "second" used herein do not denote any particular order or quantity, but rather are used to distinguish one element from another.
As shown in fig. 1 to 7, a percutaneous pedicle screw spacing adjustment device according to the present invention includes: the force application clamp assembly 100 is provided with two connecting ends 110 capable of moving relatively and a handle structure 120 for driving the two connecting ends 110 to close or open; the two pressing components 200 correspond to the two connecting ends 110 one by one respectively, each pressing component 200 comprises a first pressing component 210, a first connecting rod piece 220, a second connecting rod piece 230 and a third connecting rod piece 240, one end of each first pressing component 210 is provided with a jaw, the other end of each first pressing component is fixedly connected with one end of each first connecting rod piece 220, the other end of each first connecting rod piece 220 is rotatably connected with one end of each second connecting rod piece 230 and is provided with a first locking structure 250, the other end of each second connecting rod piece 230 is rotatably connected with one end of each third connecting rod piece 240 and is provided with a second locking structure 260, and the other end of each third connecting rod piece 240 is rotatably connected with the connecting end 110 and is provided with a third locking structure 270; when the first locking structure 250 is released, the first link member 220 can rotate about the first axis; when the first locking structure 250 is locked, the first link member 220 is fixed with the second link member 230; when the second locking structure 260 is released, the second link member 230 can rotate about the second axis; when the second locking structure 260 is locked, the second link member 230 is fixed with the third link member 240; when the third locking structure 270 is released, the third link member 240 can rotate about the third axis; when the third locking structure 270 is locked, the third link member 240 is fixed to the connection end 110; the first axis, the second axis and the third axis are mutually vertical or approximately vertical pairwise.
As shown in fig. 1 to 8, in the spinal orthopedic surgery, when it is required to open and compress a laterally bent vertebra using a pedicle screw 300 and a connecting rod 400, the pedicle screw 300 may be driven into the spine, and the connecting rod 400 may be disposed on the tail caps 310 of two pedicle screws 300; then, the first pressing parts 210 of the two pressing components 200 are respectively corresponding to one pedicle screw 300 by utilizing a percutaneous pedicle screw spacing adjusting device, at the moment, the first locking structures 250, the second locking structures 260 and the third locking structures 270 are all loosened, the jaws of the first pressing parts 210 are adjusted along three dimensions (a first axis, a second axis and a third axis) to be pressed against the corresponding connecting rod 400 and the pedicle screws 300, and then the first locking structures 250, the second locking structures 260 and the third locking structures 270 are respectively screwed, so that the first connecting rod 220 is fixed with the second connecting rod piece 230, the second connecting rod piece 230 is fixed with the third connecting rod piece 240, and the third connecting rod piece 240 is fixed with the connecting end 110; finally, the connecting end 110 is driven to be opened through the handle structure 120, so that the distance between the two pedicle screws 300 is expanded, or the connecting end 110 is driven to be folded through the handle structure 120, so that the distance between the two pedicle screws 300 is folded, the distance of the vertebral arch between the vertebrae is adjusted by adjusting the distance of the pedicle screws 300, the distance required by the operation is met, and finally, the locking screws are screwed through the screw driver, so that the two pedicle screws 300 are all fixed with the connecting rod 400, and the effect of fixing the distance of the vertebral arch between the vertebrae is achieved. According to the distance adjusting device for the percutaneous pedicle screws, the jaw position of the first pressing part 210 can be adjusted according to the position of the pedicle screws 300, the first pressing part is fixed after adjustment, the driving handle is unfolded or folded, force application is facilitated, the distance adjustment of the pedicle screws 300 is stable and reliable, the locking screws can be conveniently screwed down to fix the connecting rod 400 and the pedicle screws 300, the dependence on the technical requirements of the operation of a doctor is reduced, and the operation difficulty is reduced.
It should be noted that, two of the first axis, the second axis and the third axis are perpendicular or approximately perpendicular to each other, and the first axis, the second axis and the third axis are not necessarily absolutely perpendicular to each other, so that a certain error (manufacturing error, assembly error, etc.) is allowed, as long as the error does not affect the solution of the technical problem, and the protection scope of the present application is included. The other end of the first pressing member 210 and one end of the first link member 220 may be connected by: the fixed connection is realized in a non-detachable connection mode, such as welding fixation, riveting fixation, integral forming fixation and the like, and the detachable connection mode, such as threaded connection fixation, buckling fixation, sleeving fixation and the like; or, the other end of the first pressing part 210 and the one end of the first link 220 are rotatably connected by providing a bearing, or other rotatable connection manners, and the specific manner thereof may also be implemented by other prior arts, which is not described herein again. While one element may be considered "rotationally coupled" to another element, it may be rotated about an axis or centerline of the rod, such as the axis of the shaft, the axis of the rotor 246, or the axis of the coupling member, in a variety of embodiments.
As shown in fig. 1 to 6, in addition, there are various ways to implement the first locking structure 250, the second locking structure 260 or/and the third locking structure 270, such as to implement the first link member 220, the second link member 230 or the third link member 240 to rotate or not to rotate by the loose fit of the fastening member and the connecting hole, such as a bolt and a threaded hole, a limit pin and a pin hole; or the first link member 220, the second link member 230 or the third link member 240 can rotate or not rotate by means of snap fit, such as a clutch.
As shown in fig. 1 to 7, specifically, the other end of the first link member 220 is provided with a first mounting hole 223 and at least two first connection holes 225 arranged at intervals along the outer circumference of the first mounting hole 223, one end of the second link member 230 is provided with a first clamping groove 231 rotatably engaged with the other end of the first link member, a first rotating shaft 232 fixedly disposed on the inner wall of the first clamping groove 231, and a first fastening member 233, the first rotating shaft 232 is rotatably engaged with the first mounting hole 223, so that the first link member 220 can rotate around the axis of the first rotating shaft 232, and one end of the first fastening member 233 passes through the side wall of the first clamping groove 231 and is fastened and engaged with the first connection holes 225 to form a first locking structure 250. Thereby realizing the rotational connection between the first link member 220 and the second link member 230, and realizing the rotation of the first link member 220 along the axis of the first rotating shaft 232 (i.e. the first axis) and the angle adjustment between the first link member 220 and the second link member 230; meanwhile, the first fastening member 233 is engaged with the first connection hole 225 to form a first locking structure 250, so as to fix the first link member 220 and the second link member 230. Further, the other end of the second link member 230 is provided with a second clamping groove 234 and a second connecting hole 235 penetrating through the sidewall of the second clamping groove 234, one end of the third link member 240 is provided with a connecting body 242 rotatably matched with the second clamping groove 234 and a second fastening member 244 arranged on the connecting body 242, the second fastening member 244 is matched with the second connecting hole 235 to form a second locking structure 260, and the second link member 230 can rotate around the axis of the second fastening member 244; thereby realizing the rotational connection between the second link member 230 and the third link member 240, and realizing the rotation of the second link member 230 along the axis (i.e. the second axis) of the second fastening member 244 and the angle adjustment between the second link member 230 and the third link member 240; meanwhile, the second fastening structure 260 is formed by the cooperation of the second fastening member 244 and the second connecting hole 235, so as to fix the second link member 230 and the third link member 240. Still further, the other end of the third link member 240 is provided with a rotating body 246, the third link member 240 can rotate around the axis of the rotating body 246, the connecting end 110 is provided with a third connecting hole 112 in socket joint and rotating fit with the rotating body 246, and a third fastening member 114 forming a third locking structure 270 with the inner wall of the third connecting hole 112; thereby realizing the rotational connection between the third link member 240 and the connecting end 110, and realizing the rotation of the third link member 240 along the axis of the rotating body 246 (i.e. the third axis) and the angle adjustment between the third link member 240 and the connecting end 110; meanwhile, the third fastening structure 270 is formed by the third fastening member 114 and the third connecting hole 112, so as to fix the third link member 240 and the connecting end 110.
Or in another embodiment, the first 250, second 260, or/and third 270 locking structures include a repositionable indexing pin (not shown), and a pin hole (not shown) that snap fits into a fastening end of the indexing pin. And then the fastening end of usable index pin and the solid cooperation of the card that can reset of pinhole realize the tight structure 250 of first tight locking, the tight structure 260 of second tight locking and the tight structure 270 of third tight locking loosen or lock, convenient operation, easy to carry out helps improving operation efficiency.
As shown in fig. 1 to fig. 3 and fig. 7, on the basis of any of the above embodiments, the first pressing member 210 is a cylindrical structure and is provided with a first through hole 212 penetrating through two ends thereof, the side wall of the first pressing member 210 is provided with two oppositely arranged limiting grooves 214, the limiting grooves 214 are in clearance fit with the connecting rod 400, the inner side wall of the limiting grooves 214 is in press fit with the tail cap 310 of the pedicle screw 300, and the two limiting grooves 214 are mutually matched to form a jaw. Because the first pressing part 210 is a cylindrical structure and is provided with the first through hole 212 for facilitating insertion of a screwdriver, and the two limiting grooves 214 are arranged on the cylindrical first pressing part 210 to form a jaw, the pedicle screw 300 can be sleeved into the first through hole 212, and then the tail cap 310 of the pedicle screw 300 is pressed by the inner side walls of the two limiting grooves 214, so that the spreading and extruding actions can be realized, the limiting grooves 214 can be used for inserting the connecting rod 400, and the problem that the first pressing part 210 cannot be pressed and matched with the tail cap 310 of the pedicle screw 300 due to the interference effect of the connecting rod 400 is avoided. Further, the outer side wall of the first pressing member 210 is provided with an auxiliary positioning groove 216 which is arranged along the axial direction of the first pressing member 210 and spaced from the limiting groove 214, the center line of the auxiliary positioning groove 216 and the center line of the limiting groove 214 are on the same straight line, and the width of the auxiliary positioning groove 216 is equal to the width of the limiting groove 214. The auxiliary positioning groove 216 is further used for assisting in positioning the position of the limiting groove 214, so that a doctor can conveniently judge the position of the clamping groove, related operation can be better implemented, and meanwhile, the weight of the first pressing part 210 can be reduced due to the arrangement of the auxiliary positioning groove 216; meanwhile, the weight reduction groove 218 can be further arranged along the circumferential direction of the first pressing part 210, so that when the distance adjusting device for operating the percutaneous pedicle screws is used for adjusting the distance between the two pedicle screws 300, the operation is more stable, and the success rate of the operation is improved. Further, the other end of the first pressing member 210 is detachably and rotatably connected to the first link member 220, and the first link member 220 is provided with a second through hole 221 corresponding to the first through hole 212. And then the first pressing element 210 can be replaced according to actual needs to adapt to different operation requirements. Specifically, the other end of the first pressing member 210 is provided with an external thread structure, the first link member 220 is provided with a bearing, an outer ring of the bearing is fixed to the inner wall of the second through hole, and an inner wall of an inner ring of the bearing is provided with an internal thread structure matched with the external thread structure, so that the other end of the first pressing member 210 can be detachably and rotatably connected with one end of the first link member 220.
As shown in fig. 1, 7 and 8, on the basis of any of the above embodiments, the handle structure 120 includes two opposite first and second handles 122 and 124, and an elastic member 126 disposed between the first and second handles 122 and 124, wherein the first and second handles 122 and 124 are rotatably connected and can drive the two connecting ends 110 to close or open. The distance between the first handle 122 and the second handle 124 can be elastically and automatically reset, and the structures of the first handle 122 and the second handle 124 can be set according to requirements, for example, when the first handle 122 and the second handle 124 move towards each other, the two connecting ends 110 are gradually folded; when first handle 122 and second handle 124 are moved in opposite directions, the two connecting ends 110 are gradually opened. Or first handle 122 and second handle 124 move towards each other, the two connecting ends 110 are gradually opened; when first handle 122 and second handle 124 are moved in opposite directions, the two connecting ends 110 are gradually closed. The elastic member 126 may be an elastic plate, a return spring, etc.
Further, the handle structure 120 further includes a self-locking assembly. In one embodiment, the self-locking assembly includes a ratchet gear (not shown) rotatably disposed on the first handle 122 and a latch (not shown) engaged with the ratchet gear, the latch being disposed on the second handle 124 to achieve the one-way self-locking function of the handle structure 120. In another embodiment, the self-locking assembly comprises a rack (not shown) rotatably disposed on the first handle 122 and a slot (not shown) disposed on the second handle 124 and snap-fitted with a latch of the rack; or the auto-lock subassembly includes scalable setting up spacing dop on first handle 122 and sets up on second handle 124 from the locking part (not shown), from the locking part be equipped with along its length direction interval set up a plurality of card holes (not shown), card hole and spacing dop cooperation. Furthermore, the self-locking component can realize self-locking when the first handle 122 and the second handle 124 are contracted or folded, so that the bidirectional self-locking function of the handle structure 120 is realized, self-locking can be realized even if the opening operation and the extrusion operation are carried out, and the convenience of the operation is improved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (11)
1. A percutaneous pedicle screw spacing adjustment device, comprising:
the force application clamp assembly is provided with two connecting ends capable of moving relatively and a handle structure for driving the two connecting ends to be closed or opened; and
the two abutting assemblies correspond to the two connecting ends one to one respectively, each abutting assembly comprises a first abutting part, a first connecting rod piece, a second connecting rod piece and a third connecting rod piece, one end of the first abutting part is provided with a jaw, the other end of the first abutting part is connected with one end of the first connecting rod piece, the other end of the first connecting rod piece is rotatably connected with one end of the second connecting rod piece and is provided with a first locking structure, the other end of the second connecting rod piece is rotatably connected with one end of the third connecting rod piece and is provided with a second locking structure, and the other end of the third connecting rod piece is rotatably connected with the connecting ends and is provided with a third locking structure;
when the first locking structure is released, the first connecting rod piece can rotate around the first axis; when the first locking structure is locked, the first connecting rod piece and the second connecting rod piece are fixed;
when the second locking structure is released, the second connecting rod piece can rotate around the second axis; when the second locking structure is locked, the second connecting rod piece and the third connecting rod piece are fixed;
when the third locking structure is released, the third connecting rod piece can rotate around a third axis; when the third locking structure is locked, the third connecting rod piece is fixed with the connecting end;
the first axis, the second axis and the third axis are mutually vertical or approximately vertical pairwise.
2. The device for adjusting the distance between the percutaneous pedicle screws as claimed in claim 1, wherein the first pressing member has a cylindrical structure and is provided with a first through hole penetrating through two ends thereof, the sidewall of the first pressing member is provided with two oppositely arranged limiting grooves, the limiting grooves are in clearance fit with the connecting rod, the inner sidewall of the limiting grooves is in press fit with the tail caps of the pedicle screws, and the two limiting grooves are mutually matched to form the jaws.
3. The device for adjusting the distance between the percutaneous pedicle screws as claimed in claim 2, wherein the outer sidewall of the first pressing member is provided with an auxiliary positioning groove spaced from the limiting groove along the axial direction of the first pressing member, the center line of the auxiliary positioning groove is aligned with the center line of the limiting groove, and the width of the auxiliary positioning groove is equal to the width of the limiting groove.
4. The percutaneous pedicle screw spacing adjustment device as claimed in claim 2, wherein the other end of the first pressing member is detachably and rotatably connected with the first link member, and the first link member is provided with a second through hole corresponding to the first through hole.
5. The device for adjusting the distance between percutaneous pedicle screws as claimed in claim 1, wherein the other end of the first link member has a first mounting hole and at least two first connection holes spaced apart from each other along the outer circumference of the first mounting hole, the one end of the second link member has a first clamping groove rotatably engaged with the other end of the first link member, a first rotating shaft fixed to the inner wall of the first clamping groove, and a first fastening member rotatably engaged with the first mounting hole to allow the first link member to rotate around the axis of the first rotating shaft, and one end of the first fastening member passes through the side wall of the first clamping groove and is fastened to the first connection holes to form the first locking structure.
6. The device for adjusting the distance between two percutaneous pedicle screws as claimed in claim 5, wherein the second link member has a second slot and a second hole extending through a sidewall of the second slot, the third link member has a connecting body rotatably engaged with the second slot and a second fastener disposed on the connecting body, the second fastener and the second hole cooperate to form the second locking structure, and the second link member is rotatable around an axis of the second fastener.
7. The device for adjusting the distance between the percutaneous pedicle screws as claimed in claim 6, wherein a rotator is provided at the other end of the third link member, the third link member is rotatable around the axis of the rotator, the connecting end is provided with a third connecting hole in sleeve fit with the rotator and in rotatable fit with the rotator, and a third fastening member forming the third locking structure with the inner wall of the third connecting hole.
8. The percutaneous pedicle screw spacing adjustment device according to claim 1, wherein the first locking structure, the second locking structure, or/and the third locking structure comprises a repositionable indexing pin and a pin hole snap-fittingly engaged with a fastening end of the indexing pin.
9. The device for adjusting the distance between two percutaneous pedicle screws according to any one of claims 1 to 8, wherein the handle structure comprises a first handle and a second handle which are oppositely arranged, and an elastic member arranged between the first handle and the second handle, the first handle and the second handle are rotatably connected and can drive the two connecting ends to be closed or opened.
10. The percutaneous pedicle screw spacing adjustment device according to claim 9, wherein the handle structure further comprises a self-locking assembly, the self-locking assembly comprises a rack rotatably arranged on the first handle and a clamping groove arranged on the second handle and matched with the clamping teeth of the rack in a clamping manner.
11. The device for adjusting the distance between two percutaneous pedicle screws as claimed in claim 9, wherein the handle structure further comprises a self-locking assembly, the self-locking assembly comprises a limit chuck telescopically arranged on the first handle and a self-locking member arranged on the second handle, the self-locking member is provided with a plurality of clamping holes arranged at intervals along the length direction of the self-locking member, and the clamping holes are matched with the limit chuck.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710818741.4A CN107595377B (en) | 2017-09-12 | 2017-09-12 | Device for adjusting distance between percutaneous pedicle screws |
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| CN201710818741.4A CN107595377B (en) | 2017-09-12 | 2017-09-12 | Device for adjusting distance between percutaneous pedicle screws |
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| CN107595377A CN107595377A (en) | 2018-01-19 |
| CN107595377B true CN107595377B (en) | 2020-03-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108814680B (en) * | 2018-04-10 | 2019-06-25 | 中国人民解放军陆军军医大学第二附属医院 | Purse-string forceps for single-hole laparoscopic surgery |
| CN110101419A (en) * | 2019-04-26 | 2019-08-09 | 昆明医科大学第二附属医院 | A kind of device for spreading being adapted to pedicle screw |
| CN110974390B (en) * | 2019-12-11 | 2020-11-17 | 常州市图尔迈医疗器械有限公司 | Mounting rack for accurately positioning intramedullary nail |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2109147A (en) * | 1937-05-27 | 1938-02-22 | Patrick P Grosso | Adjustable angle surgical instrument |
| US2507710A (en) * | 1949-07-02 | 1950-05-16 | Patrick P Grosso | Adjustable-angle surgical instrument |
| CN202526239U (en) * | 2012-05-04 | 2012-11-14 | 何登伟 | Vertebral body opening device used for spinal column posterior surgery |
| CN203234786U (en) * | 2013-04-24 | 2013-10-16 | 浙江康慈医疗科技有限公司 | Double-joint distraction forceps |
| CN204931785U (en) * | 2015-09-22 | 2016-01-06 | 杨镇源 | Anti-dumping formula pedicle screw distraction forcep with a scale |
| CN106725663A (en) * | 2017-02-22 | 2017-05-31 | 山东省立医院 | A kind of intervertenral space device for spreading and application method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208851621U (en) * | 2017-09-12 | 2019-05-14 | 山东威高骨科材料股份有限公司 | The spacing regulator of percutaneous cervical arc root screw |
-
2017
- 2017-09-12 CN CN201710818741.4A patent/CN107595377B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2109147A (en) * | 1937-05-27 | 1938-02-22 | Patrick P Grosso | Adjustable angle surgical instrument |
| US2507710A (en) * | 1949-07-02 | 1950-05-16 | Patrick P Grosso | Adjustable-angle surgical instrument |
| CN202526239U (en) * | 2012-05-04 | 2012-11-14 | 何登伟 | Vertebral body opening device used for spinal column posterior surgery |
| CN203234786U (en) * | 2013-04-24 | 2013-10-16 | 浙江康慈医疗科技有限公司 | Double-joint distraction forceps |
| CN204931785U (en) * | 2015-09-22 | 2016-01-06 | 杨镇源 | Anti-dumping formula pedicle screw distraction forcep with a scale |
| CN106725663A (en) * | 2017-02-22 | 2017-05-31 | 山东省立医院 | A kind of intervertenral space device for spreading and application method |
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| CN107595377A (en) | 2018-01-19 |
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