CN2678586Y

CN2678586Y - Nail grafting guider for pedicle of vertebral arch

Info

Publication number: CN2678586Y
Application number: CN 200420011421
Authority: CN
Inventors: 叶保国
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-01-09
Filing date: 2004-01-09
Publication date: 2005-02-16
Anticipated expiration: 2014-01-09

Abstract

The utility model relates to a nail grafting guider for pedicle of vertebral arch, comprising a crest attaching clamp, a transversal guiding rod, a sliding block, a guiding component and a longitudinal guiding component. The crest attaching clamp is connected in sliding mold with the longitudinal guiding component through a clearing hole inside. The transversal guiding rod is provided with a holder, through which the transversal guiding rod is connected with the longitudinal guiding component. The transversal guiding rod can slide longitudinally and turn to a certain angle with the convex tenon and the locking screw on the inner surface of the holder as the axis. The guiding component is connected with the transversal guiding rod through the sliding block and can slide along the transversal guiding rod through the sliding block or move up and down corresponding to the sliding block. The guider is provided with a guiding component to choose the different horizontal angles of toe-in and a transversal guiding rod holder structure to adjust the nail inlet angle, to assure the accurate symmetry of all the nail inlet angles and the nail inlet points to decrease the difficulty and the danger of the operation and enhance the prognosis of the operation.

Description

Pedicle nail is planted the nail guider

Technical field

This utility model relates to the accurate apparatus of implanting of the pedicle nail that uses in a kind of bone surgery, relates in particular to a kind of pedicle nail and plants the nail guider.

Background technology

In the spinal surgery, pedicle screw system is widely used in recent years, and accurately pedicle screw is operation success and the key that reduces complication.The main both at home and abroad at present localization method that adopts has: 1. locate by rule of thumb, fully expose in the art, damage range is big, and error is big; 2.X the x ray fluoroscopy x machine is operation down, complicated operation is harmful; 3. the computer navigation instrument is located, equipment price costliness, system's complicated operation or the like.Preceding two kinds of methods are used by domestic most of hospital.

Summary of the invention

The purpose of this utility model is to provide a kind of accurate pedicle nail to implant the apparatus of guiding, makes operation technique simple, convenient and rapid, reduces to expose under the X line and prevent to miss and plants the generation severe complication.

Pedicle nail is planted the nail guider and is included spinous process fixation clamp 17, horizontal guide rod 18, slide block 21, guide 19 and Der Laengslenker 20, and spinous process fixation clamp 17 is slidingly connected with Der Laengslenker 20 by the hole 4 of passing through of its inside; Laterally guide rod 18 is provided with deck 7, and laterally guide rod 18 links to each other with Der Laengslenker 20 by deck 7, can longitudinally slide and prominent tenon 8 that can deck 7 inner faces and lock screw 22 for spool turning an angle; Guide 19 passes through slide block 21 and links to each other with horizontal guide rod 18, and can be by slide block 21 along laterally horizontal slip of guide rod or relative slide block move up and down.

The end face of Der Laengslenker 20 and horizontal guide rod 18 indicates scale.

What spinous process fixation clamp 17 adopted is the synchronous automatic locking positioning device that two coaxial reverse screw-rod structures are connected by adjusting screw(rod) 3, and spinous process clamping plate 1 are provided with plurality of teeth 2.

Deck 7 is positioned at the center of horizontal guide rod 18.

Guide 19 is made of locating rod 10 and angled with it guide pipe 11, and locating rod 10 slide block 21 relatively moves up and down and be fixing with lock screw 24.

Locating rod 10 and guide pipe 11 can adopt fixed angle be fixedly connected or the hinge of variable-angle connects.

This utility model is that a kind of pedicle screw at nail angle and accurate entry point of selecting is into planted the nail guider, it has the guide that can select the varying level leaning angle and adjusts the structure that sagittal plane enters to follow closely the angle, have accurately scale structure and can regulate entry point accurately, having the symmetric structure of center line can make all screws insert simultaneously, guarantee that all advance to follow closely the accurate symmetry of angle and entry point, thereby the difficulty of operation and danger are reduced, improved the prognosis of operation.

Description of drawings

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the structural representation of spinous process fixation clamp of the present utility model

Fig. 3 is the structural representation of horizontal guide rod of the present utility model

Fig. 4 is the structural representation of guide of the present utility model

Fig. 5 is the structural representation of Der Laengslenker of the present utility model

Fig. 6 is the structural representation of slide block of the present utility model

Wherein 1 is the spinous process clamping plate; 2 is tooth; 3 is screw rod; 4 pass through the hole for Der Laengslenker; 5 is the spinous process holder; 6,22,23,24 is lock screw; 7 is deck; 8 are prominent tenon; 9 is cross bar; 10 is locating rod; 11 is guide pipe; 12 is side channel; 13 is scale marker; 14 is slide body; 15 pass through the hole for cross bar; 16 pass through the hole for locating rod; 17 is the spinous process fixation clamp; 18 is horizontal guide rod; 19 is guide; 20 is Der Laengslenker; 21 is slide block.

The specific embodiment:

Below in conjunction with accompanying drawing the specific embodiment of the present utility model and use are described in detail.

As shown in Figure 1, this utility model is an axis of symmetry with Der Laengslenker 20, and structure on two sides is identical.Its critical piece has: spinous process fixation clamp 17 is to make the spinous process that links to each other with two coaxial reverse screw-rod structures press from both sides the center of synchronous lock-bit in spinal column by adjusting screw(rod) 3, makes Der Laengslenker 20 be fixed in the median line of spinal column by hole 4 by the Der Laengslenker of spinous process fixation clamp 17; Der Laengslenker 20 end faces have scale, and laterally the center of guide rod 18 has deck 7 to link to each other with Der Laengslenker 20, can by scale longitudinally guide rod vertically move and regulate the next vertebral body entry point distance.Laterally guide rod deck inner face has prominent tenon and lock screw to slide in the side channel 12 of Der Laengslenker 20, and with fixing from (sagittal plane enters the to follow closely the angle) back that turns an angle as axle.Laterally guide rod two arms are marked with scale, and guide 19 can laterally slide along horizontal guide rod 18 by slide block 21, and the entry point that mixes up same cone by scale slides with the lock screw fixed lateral apart from the back.Guide is made of the guide pipe at locating rod and angled with it (e angle), and the locating rod of guider slide block relatively moves up and down and fixes with lock screw, makes the hole of advancing to follow closely of guide pipe be close to entry point.

Fig. 2 shows the spinous process fixation clamp: screw-rod structure turns screw rod for to match with two spinous process clamping plate respectively for coaxial reverse screw rod, but two clamping plate synchronous backwards motions---clamp or unclamp; Der Laengslenker is positioned at two spinous process clamping plate center by hole 4, can combine closely with Der Laengslenker; Lock screw 6 firmly is connected the spinous process folder with Der Laengslenker.Make two clamping plate clamp spinous process to make Der Laengslenker be positioned at the spinous process median line, can make Der Laengslenker be fixed in median line by tightening screw rod by the hole.

Fig. 3 shows horizontal guide rod: deck 7 is wide with Der Laengslenker, is higher than Der Laengslenker; Prominent tenon 8 is wide with the Der Laengslenker side channel; Cross bar 9 is marked with scale.Laterally guide rod is because the fixation guide rod longitudinal sliding motion longitudinally of deck 7 and prominent tenon 8, lock screw 22 and serve as axle turn an angle (this angle is that sagittal plane enters to follow closely the angle) with prominent tenon, lock screw.

Fig. 4 shows guide: locating rod 10 and guide pipe 11 angled 10 to 15 degree, i.e. horizontal plane leaning angle e angle, can do a plurality of angles with standby, also can adopt the hinge of variable-angle to connect.

Fig. 5 shows Der Laengslenker: side channel 12 and prominent tenon 8 are wide; 13 is scale marker.

Fig. 6 shows slide block: cross bar is by hole 15 and cross bar 9 tight connectings; Locating rod is by hole 16 and locating rod 10 tight connectings; Lock screw horizontal guide rod of 23,24 secure lock and locating rod.

Using method: 1. with spinous process fixation clamp 17, laterally guide rod 18, slide block 21, guide 19 and Der Laengslenker 20 assemble by Fig. 1, each lock screw is not locked earlier, spinous process fixation clamp 17 and the laterally arrangement position conversion according to actual needs of guide rod 18, guide selects to meet the e angle.2. by the b value slide block is symmetrically fixed on the deck both sides by the scale on the horizontal guide rod.3. on Der Laengslenker, lock 2 horizontal guide rods and make locating rod by a value perpendicular to Der Laengslenker.4. determine entry point according to entry point positioning mode (Weinstein positioning mode: 1mm place under the horizontal line of dividing the both sides transverse process equally and the vertical line intersection point that is connected little up and down joint central authorities, or additive method location) cutting and expose sufficient incision.5. guider is placed otch, make the hole of advancing to follow closely of guide pipe aim at entry point, Der Laengslenker is parallel to the next vertebral body entry point line, tightens screw rod and makes the spinous process fixation clamp firmly sting tight spinous process, tightens lock screw Der Laengslenker and spinous process fixation clamp are fixed.6. insert the perforate vertebra along guide pipe, with perforate vertebra and vertebral plate contact point is fulcrum, unclamp the lock screw of this horizontal guide rod of locking, cephalad and foot side are adjusted locating rod and are made it to equal the c angle with the angle of Der Laengslenker vertical line, lock this horizontal guide rod, the lock in place bar is adjusted the c angle of another horizontal guide rod according to this step by step suddenly.7. perforate vertebra perforate is advanced nail along guide pipe and can be reached the purpose of accurately advancing nail.

The measurement of correlation values:

The mensuration at e angle (horizontal plane advances to follow closely angle or leaning angle): on CT, measure required e angle, usually value 10-15 degree.

The mensuration of the same vertebral body entry point of b distance: on CT sheet and normotopia X sheet, measure entry point distance, be converted into actual size, average after relatively according to scale with vertebral body.

The next vertebral body entry point distance on a homonymy:, be converted into actual size according to scale measuring the next vertebral body entry point distance on the homonymy on the normotopia X sheet.

The mensuration at c angle (sagittal plane enters to follow closely the angle): on the X sheet of side position, standardized horizontal line connects last the next vertebral body pedicle of vertebral arch and vertebral plate junction, and the last the next vertebral body pedicle of vertebral arch longitudinal axis angle of the vertical line of horizontal line is therewith promptly gone up the next c angle.

Claims

1. pedicle nail is planted the nail guider, it is characterized in that it includes spinous process fixation clamp (17), horizontal guide rod (18), slide block (21), guide (19) and Der Laengslenker (20), spinous process fixation clamp (17) is slidingly connected with Der Laengslenker (20) by the hole (4) of passing through of its inside; Laterally guide rod (18) is provided with deck (7), and laterally guide rod (18) links to each other with Der Laengslenker (20) by deck (7), can longitudinally slide and prominent tenon (8) that can deck (7) inner face and lock screw (22) are spool to turn an angle; Guide (19) passes through slide block (21) and links to each other with horizontal guide rod (18), and can be by slide block (21) along laterally horizontal slip of guide rod or relative slide block move up and down.

2. pedicle nail according to claim 1 and 2 is planted the nail guider, it is characterized in that the end face of described Der Laengslenker (20) and horizontal guide rod (18) indicates scale.

3. pedicle nail according to claim 1 and 2 is planted the nail guider, what it is characterized in that described spinous process fixation clamp (17) employing is the synchronous automatic locking positioning device that two coaxial reverse screw-rod structures are connected by adjusting screw(rod) (3), and spinous process clamping plate (1) are provided with plurality of teeth (2).

4. pedicle nail according to claim 1 and 2 is planted the nail guider, it is characterized in that described deck (7) is positioned at the center of horizontal guide rod (18).

5. pedicle nail according to claim 1 and 2 is planted the nail guider, it is characterized in that described guide (19) is made of locating rod (10) and angled with it guide pipe (11), locating rod (10) slide block (21) relatively moves up and down and fixes with lock screw.

6. pedicle nail according to claim 5 is planted the nail guider, it is characterized in that described locating rod (10) and guide pipe (11) can adopt fixed angle be fixedly connected or the hinge of variable-angle connects.