阅读说明：本技术 一种用于脊柱手术的微创牵开器及关联方法 (Minimally invasive retractor for spinal surgery and associated methods ) 是由 刘晓东 蔡丰 张琰 刘亮 杨安礼 于 2019-09-05 设计创作，主要内容包括：本发明公开了一种用于脊柱手术的微创牵开器及关联方法,具体涉及医疗器械技术领域,包括固定杆,所述固定杆两端均设有牵开机构；所述牵开机构包括定位杆,所述第二固定块与固定杆固定连接,所述定位杆底部设有第一固定块,所述定位杆底端与第一固定块表面铰接,所述第一固定块一侧固定设有导向杆。本发明通过设置牵开机构和水平移动机构,第二滑套移动时通过连接块带动牵开套在调节筒外侧移动,调节块带动第一螺杆进行旋转,从而将第一螺杆与定位筒进行展开,间接的带动锚固件向外扩撑,在将锚固件进行水平移动和翻转移动进行结合后,使得锚固可以独立的进行一定牵开距离的调节,有效的对单个锚固件的牵开距离进行控制。(The invention discloses a minimally invasive retractor for spinal surgery and an associated method, and particularly relates to the technical field of medical instruments, wherein the minimally invasive retractor comprises a fixed rod, wherein two ends of the fixed rod are respectively provided with a retracting mechanism; the retracting mechanism comprises a positioning rod, a second fixing block is fixedly connected with the fixing rod, a first fixing block is arranged at the bottom of the positioning rod, the bottom end of the positioning rod is hinged to the surface of the first fixing block, and a guide rod is fixedly arranged on one side of the first fixing block. According to the invention, by arranging the retracting mechanism and the horizontal moving mechanism, the second sliding sleeve is driven by the connecting block to move outside the adjusting cylinder when moving, the adjusting block drives the first screw rod to rotate, so that the first screw rod and the positioning cylinder are unfolded, the anchoring part is indirectly driven to expand outwards, and after the anchoring part is horizontally moved and overturned to move in a combined manner, the anchoring part can independently adjust a certain retracting distance, so that the retracting distance of a single anchoring part can be effectively controlled.)

1. minimally invasive retractor for spinal surgery, comprising a fixing rod (1), characterized in that: both ends of the fixed rod (1) are provided with a retracting mechanism (2);

the retracting mechanism (2) comprises a positioning rod (3), a second fixed block (6) is fixedly connected with a fixed rod (1), a first fixed block (4) is arranged at the bottom of the positioning rod (3), the bottom end of the positioning rod (3) is hinged to the surface of the first fixed block (4), a guide rod (5) is fixedly arranged on one side of the first fixed block (4), a second fixed block (6) is fixedly arranged on one side of the guide rod (5), a connecting rod (7) is fixedly arranged at the bottom of the second fixed block (6), an adjusting cylinder (8) is fixedly arranged at the bottom of the connecting rod (7), a positioning plate (9) is fixedly arranged on one side of the adjusting cylinder (8), the first fixed block (4) is fixedly connected with the first fixed block (4), a first sliding sleeve (10) is sleeved on the outer side of the guide rod (5), a positioning cylinder (11) is arranged on the back side of the, the bottom end of the positioning cylinder (11) is hinged to the surface of the first sliding sleeve (10), a first screw (12) is arranged inside the positioning cylinder (11), the first screw (12) is in threaded connection with the positioning cylinder (11), a first bearing (13) is fixedly arranged on the outer side of the first screw (12), a positioning shell (14) is fixedly arranged on the outer side of the first bearing (13), an adjusting block (15) is fixedly arranged at the top end of the first screw (12), an inclined rod (16) is fixedly arranged at the top of the positioning shell (14), the top end of the inclined rod (16) is hinged to the surface of the fixed rod (1), and a horizontal moving mechanism (17) is arranged inside the adjusting cylinder (8);

The horizontal moving mechanism (17) comprises a second screw rod (18), one end of the second screw rod (18) is fixedly provided with a second bearing (19), the second bearing (19) is fixedly connected with the inner wall of an adjusting cylinder (8), the surface of the adjusting cylinder (8) is provided with a through sliding opening (20), the outer side of the second screw rod (18) is provided with a second sliding sleeve (21), the second screw rod (18) is in threaded connection with the second sliding sleeve (21), the second screw rod (18) penetrates through a first fixed block (4), one side of the second screw rod (18) is fixedly provided with a control ring (22), the front and the back of the second sliding sleeve (21) are both fixedly provided with a connecting block (23), one end of the connecting block (23) is fixedly provided with a retracting sleeve (24), the inner wall of the retracting sleeve (24) is fixedly provided with a ball (25), the bottom of the retracting sleeve (24) is fixedly provided with a bottom rod, the second sliding sleeve (21) is connected with the adjusting cylinder (8) in a sliding mode, the retracting sleeve (24) is connected with the adjusting cylinder (8) in a sliding mode, and the retracting sleeve (24) is arranged on the outer side of the adjusting cylinder (8).

2. a minimally invasive retractor for use in spinal surgery according to claim 1, further comprising: the utility model discloses a bottom bar, including bottom bar (26), bottom bar (26) one side is equipped with associated mechanism (27), associated mechanism (27) are including the side piece, side piece and bottom bar (26) fixed connection, the fixed shell (28) that are equipped with in side piece one side.

3. A minimally invasive retractor for spinal surgery according to claim 2, characterized in that: the clamping device is characterized in that two clamping blocks (29) are fixedly arranged on one side of the fixed shell (28), clamping grooves (30) are formed in the surfaces of the two clamping blocks (29), positioning blocks (31) are arranged inside the clamping grooves (30), the positioning blocks (31) are clamped with the clamping grooves (30), screw holes (32) are formed in the surface of the fixed shell (28), and anchoring pieces (33) are fixedly arranged at the bottoms of the positioning blocks (31).

4. a minimally invasive retractor for use in spinal surgery according to claim 3, wherein: locating piece (31) top surface is equipped with constant head tank (34), constant head tank (34) top is equipped with presses knot (35), press knot (35) and constant head tank (34) block.

5. a minimally invasive retractor for use in spinal surgery according to claim 4, wherein: and a third screw rod (36) is fixedly arranged at the top of the press buckle (35), the third screw rod (36) is in threaded connection with the screw hole (32), and a button plate is fixedly arranged at the top of the third screw rod (36).

6. A minimally invasive retractor for use in spinal surgery according to any one of claims 1 to 5, wherein: also included is a method of associating a minimally invasive retractor for use in spinal surgery, comprising the steps of:

firstly, an anchoring piece (33) is fixed on a spine, when the anchoring piece is associated, a positioning block (31) is moved between two clamping blocks (29), the positioning block (31) is clamped into a clamping groove (30), then a button plate is rotated and downwards rotated in a screw hole (32) through a third screw rod (36), so that a press buckle (35) is driven to be clamped into a positioning groove (34) formed in the top surface of the positioning block (31), the positioning block (31) is extruded and fixed in the clamping groove (30), and the anchoring piece (33) is installed in an associated mode.

7. A method of associating a minimally invasive retractor for spinal surgery according to claim 6, characterized in that: in the first step, the anchoring piece (33) is preferentially fixed in a preset area of the spinal column according to the fixation requirement, and then the anchoring piece (33) is fixedly arranged on the associated mechanism (27), so that the wound is reduced, and the anchoring piece (33) is convenient to drive into the spinal column.

Technical Field

The present invention relates to the technical field of medical instruments, and more particularly, to a minimally invasive retractor for spinal surgery and an associated method.

Background

Spinal fixation constructs are used to provide stability to the spine and, in most cases, are used as an adjunct to fusion procedures during which adjacent vertebrae are prepared to promote bone growth therebetween, thereby eliminating motion between the vertebrae.

Patent application publication No. CN106793940B discloses a spinal surgical retractor. The retractor assembly includes a retractor body, first and second arms, and first and second retractor blades. The first and second retractor blades capture a portion of the bone anchor to anchor the retractor to the body structure. First and second retractor blades are removably attached to the left and right arms, respectively. The housing is capable of being controlled to rotate by the opening unit. The blade portion has a distal end and a proximal end. The distal end includes an integral pivoting arm such that the distal end is divided into a stationary arm and a pivoting arm. The distal end of the stationary arm includes a stationary foot extending therefrom and the pivoting arm includes a pivoting foot extending therefrom to receive the neck of the bone anchor.

However, in actual use, the invention still has more defects, such as that the two anchoring pieces can not be respectively adjusted for a certain retracting distance in the use process.

Disclosure of the invention

In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a minimally invasive retractor for spinal surgery and a related method, by providing a retracting mechanism and a horizontal moving mechanism, a control ring drives a second screw to rotate, so that a second sliding sleeve outside the second screw is driven by a thread to slide inside an adjusting cylinder, the second sliding sleeve drives a retracting sleeve to move outside the adjusting cylinder through a connecting block when moving, then the retracting sleeve drives an anchoring member fixed by the related mechanism to move horizontally through a bottom rod, the adjusting block drives a first screw to rotate, then the first screw rotates in a thread inside a positioning cylinder, so that the first screw and the positioning cylinder are unfolded, then the positioning cylinder drives the first sliding sleeve to slide outside a guide rod, so as to push the adjusting cylinder to turn outwards, thereby indirectly driving the anchoring member to expand outwards, after the anchoring member performs a horizontal movement and a turning movement to be combined, the anchoring can independently adjust a certain retracting distance, and the retracting distance of a single anchoring piece can be effectively controlled, so that the problems in the background art are solved.

in order to achieve the purpose, the invention provides the following technical scheme: a minimally invasive retractor for spine surgery comprises a fixed rod, wherein both ends of the fixed rod are provided with retracting mechanisms;

The retracting mechanism comprises a positioning rod, a second fixing block is fixedly connected with the positioning rod, a first fixing block is arranged at the bottom of the positioning rod, the bottom end of the positioning rod is hinged with the surface of the first fixing block, a guide rod is fixedly arranged on one side of the first fixing block, a second fixing block is fixedly arranged on one side of the guide rod, a connecting rod is fixedly arranged at the bottom of the second fixing block, an adjusting cylinder is fixedly arranged at the bottom of the connecting rod, a positioning plate is fixedly arranged on one side of the adjusting cylinder, the first fixing block is fixedly connected with the first fixing block, a first sliding sleeve is sleeved on the outer side of the guide rod, a positioning cylinder is arranged on the back surface of the first sliding sleeve, the bottom end of the positioning cylinder is hinged with the surface of the first sliding sleeve, a first screw rod is arranged inside the positioning cylinder, the first screw rod is in threaded connection with the positioning cylinder, an adjusting block is fixedly arranged at the top end of the first screw rod, an inclined rod is fixedly arranged at the top of the positioning shell, the top end of the inclined rod is hinged with the surface of the fixed rod, and a horizontal moving mechanism is arranged inside the adjusting cylinder;

The horizontal moving mechanism comprises a second screw rod, a second bearing is fixedly arranged at one end of the second screw rod, the second bearing is fixedly connected with the inner wall of the adjusting cylinder, a through sliding opening is formed in the surface of the adjusting cylinder, a second sliding sleeve is arranged on the outer side of the second screw rod, the second screw rod is in threaded connection with the second sliding sleeve, a first fixing block is penetrated through by the second screw rod, a control ring is fixedly arranged on one side of the second screw rod, a connecting block is fixedly arranged on the front side and the back side of the second sliding sleeve, a retracting sleeve is fixedly arranged at one end of the connecting block, balls are fixedly arranged on the inner wall of the retracting sleeve, a bottom rod is fixedly arranged at the bottom of the retracting sleeve, the second sliding sleeve is in sliding connection with the inside of the adjusting cylinder, the retracting sleeve is in sliding connection.

In a preferred embodiment, a linking mechanism is arranged on one side of the bottom rod, the linking mechanism comprises a side block, the side block is fixedly connected with the bottom rod, and a fixed shell is fixedly arranged on one side of the side block.

In a preferred embodiment, two clamping blocks are fixedly arranged on one side of the fixing shell, clamping grooves are formed in the surfaces of the two clamping blocks, positioning blocks are arranged inside the clamping grooves and clamped with the clamping grooves, screw holes are formed in the surface of the fixing shell, and anchoring parts are fixedly arranged at the bottoms of the positioning blocks.

in a preferred embodiment, the positioning block is provided with a positioning groove on the top surface, and a press buckle is arranged on the top of the positioning groove and is clamped with the positioning groove.

In a preferred embodiment, a third screw is fixedly arranged at the top of the press buckle, the third screw is in threaded connection with the screw hole, and a button plate is fixedly arranged at the top of the third screw.

Also included is a method of associating a minimally invasive retractor for use in spinal surgery, comprising the steps of:

Step one, the anchoring part is fixed on the spine, during association, the positioning block is moved between the two clamping blocks, the positioning block is clamped into the clamping groove, then the button plate is rotated and downwards rotated in the screw hole through the third screw rod, so that the pressing buckle is driven to be clamped into the positioning groove formed in the top surface of the positioning block, the positioning block is extruded and fixed inside the clamping groove, and then the anchoring part is installed in an associated mode

In a preferred embodiment, in the first step, the anchoring piece is preferentially fixed on the preset area of the spinal column according to the fixation requirement, and then the anchoring piece is fixedly arranged on the associated mechanism, so that the wound is reduced, and the anchoring piece is convenient to be nailed into the spinal column.

The invention has the technical effects and advantages that:

1. By arranging the retracting mechanism and the horizontal moving mechanism, the control ring drives the second screw rod to rotate, thereby the second sliding sleeve outside the second screw rod is driven by the screw thread to slide in the adjusting cylinder, the second sliding sleeve is driven by the connecting block to move outside the adjusting cylinder when moving, then the retracting sleeve drives the anchoring part fixed by the associated mechanism to horizontally move by the bottom rod, the adjusting block drives the first screw rod to rotate, then the first screw rod rotates in the positioning cylinder by the screw thread, thereby expanding the first screw rod and the positioning cylinder, then the positioning cylinder drives the first sliding sleeve to slide outside the guide rod, thereby pushing the adjusting cylinder to turn outwards, thereby indirectly driving the anchoring piece to expand outwards, after the anchoring piece is combined with horizontal movement and overturning movement, the anchoring piece can independently adjust a certain retracting distance, and the retracting distance of a single anchoring piece is effectively controlled;

2. Through setting up the associative mechanism, remove the locating piece between two fixture blocks, make inside the locating piece card goes into the draw-in groove, later rotatory button board, the button board passes through the third screw rod and rotates downwards in the screw is inside, thereby it goes into inside the constant head tank that locating piece top surface was equipped with to drive the buckle card, thereby fix the locating piece extrusion inside the draw-in groove, and then carry out the associative installation to anchoring part, the effectual installation is fixed when combining anchoring part, adopt the fixed of stand-alone type anchoring part, receive the influence of apparatus when avoiding anchoring part fixed, the effectual fixed efficiency who promotes anchoring part, anchoring part is single fixed convenient, reduce spinal surgery's wound area.

Drawings

FIG. 1 is a top view of the present invention.

Fig. 2 is a front view of the present invention.

FIG. 3 is a schematic view of a portion A of FIG. 1 according to the present invention.

FIG. 4 is a schematic view of a portion A of FIG. 1 according to the present invention.

FIG. 5 is a schematic view of a portion A of FIG. 1 according to the present invention.

Fig. 6 is a schematic structural view of a second sliding sleeve, a connecting block and a retracting sleeve.

Fig. 7 is a perspective view of the fixing housing and the latch according to the present invention.

The reference signs are: the device comprises a fixing rod 1, a retracting mechanism 2, a positioning rod 3, a first fixing block 4, a guide rod 5, a second fixing block 6, a connecting rod 7, an adjusting cylinder 8, a positioning plate 9, a first sliding sleeve 10, a positioning cylinder 11, a first screw 12, a first bearing 13, a positioning shell 14, an adjusting block 15, an inclined rod 16, a horizontal moving mechanism 17, a second screw 18, a second bearing 19, a through sliding opening 20, a second sliding sleeve 21, a control ring 22, a connecting block 23, a retracting sleeve 24, a ball 25, a bottom rod 26, a correlation mechanism 27, a fixing shell 28, a clamping block 29, a clamping groove 30, a positioning block 31, a screw hole 32, an anchoring part 33, a positioning groove 34, a press buckle 35 and a third screw 36.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The minimally invasive retractor for the spine surgery as shown in the attached figures 1-7 comprises a fixing rod 1, wherein both ends of the fixing rod 1 are provided with retracting mechanisms 2;

The retracting mechanism 2 comprises a positioning rod 3, a second fixed block 6 is fixedly connected with a fixed rod 1, a first fixed block 4 is arranged at the bottom of the positioning rod 3, the bottom end of the positioning rod 3 is hinged with the surface of the first fixed block 4, a guide rod 5 is fixedly arranged on one side of the first fixed block 4, a second fixed block 6 is fixedly arranged on one side of the guide rod 5, a connecting rod 7 is fixedly arranged at the bottom of the second fixed block 6, an adjusting cylinder 8 is fixedly arranged at the bottom of the connecting rod 7, a positioning plate 9 is fixedly arranged on one side of the adjusting cylinder 8, the first fixed block 4 is fixedly connected with the first fixed block 4, a first sliding sleeve 10 is sleeved on the outer side of the guide rod 5, a positioning cylinder 11 is arranged on the back surface of the first sliding sleeve 10, the bottom end of the positioning cylinder 11 is hinged with the surface of the first sliding sleeve 10, a first screw 12 is arranged in, a first bearing 13 is fixedly arranged on the outer side of the first screw 12, a positioning shell 14 is fixedly arranged on the outer side of the first bearing 13, an adjusting block 15 is fixedly arranged at the top end of the first screw 12, an inclined rod 16 is fixedly arranged at the top of the positioning shell 14, the top end of the inclined rod 16 is hinged with the surface of the fixed rod 1, and a horizontal moving mechanism 17 is arranged inside the adjusting cylinder 8;

the horizontal moving mechanism 17 comprises a second screw 18, one end of the second screw 18 is fixedly provided with a second bearing 19, the second bearing 19 is fixedly connected with the inner wall of the adjusting cylinder 8, the surface of the adjusting cylinder 8 is provided with a through sliding port 20, a second sliding sleeve 21 is arranged outside the second screw 18, the second screw 18 is in threaded connection with the second sliding sleeve 21, the second screw 18 penetrates through the first fixing block 4, a control ring 22 is fixedly arranged on one side of the second screw 18, the front and the back of the second sliding sleeve 21 are both fixedly provided with a connecting block 23, one end of the connecting block 23 is fixedly provided with a retracting sleeve 24, the inner wall of the retraction sleeve 24 is fixedly provided with a ball 25, the bottom of the retraction sleeve 24 is fixedly provided with a bottom rod 26, the second sliding sleeve 21 is connected with the inside of the adjusting cylinder 8 in a sliding manner, the retracting sleeve 24 is connected with the adjusting cylinder 8 in a sliding manner, and the retracting sleeve 24 is arranged on the outer side of the adjusting cylinder 8.