CN208756142U - A kind of pedicle screw open circuit guide instrument - Google Patents

Abstract

The utility model discloses a kind of pedicle screw open circuit guide instruments, including rod-like element, the rod-like element includes holding section and boot segment, the boot segment is vertebra shape and tip is equipped with bulb, the other end is connected with the holding section, is equipped in the boot segment and is used to limit the depth-limiting mechanism that boot segment enters centrum depth.The advantages that the utility model has structure simple, easy to use, can reduce the incidence for breaking through cortical bone, reduce the generation of complication.

Description

A kind of pedicle screw open circuit guide instrument

Technical field

The utility model relates to medical instrument more particularly to a kind of pedicle screw open circuit guide instruments, are used for The preparation of pedicle channel before pedicle screw is manually placed in spinal surgery clinical operation.

Background technique

With the development of spinal surgery, more and more spinal traumas, regression, deformity, tuberculosis and tumor patient need to pass through Internal fixation operation treatment, pedicle screw fixation operation are increasingly becoming so-called internal fixation of spine by continuous development and perfect " goldstandard ", the extensive utilization in clinic.The accurate merging of pedicle screw is that internal fixation operation successfully closes in clinical operation Key and basis, but since pedicle of vertebral arch and anterior margin of vertebral body are adjoined more complex, Pedicle Screw is improper to be easy to cause neural blood vessel The postoperative complications such as damage, nail-stick system loosening, seriously affect treatment or even the big blood vessel rupture of patient, threat to life.Tradition Nail technology is manually set dependent on X-ray examination in anatomy positioning, patient's experience and art to guarantee accuracy rate, used instrument is logical Often there are opener, the device that clears the way, pilot pin and screw tap etc., the incidence for wearing out pedicle of vertebral arch cortical bone reaches 21.1%~39.8%. The especially conventional device that clears the way is easy to break through cortical bone, damage inwardly into canalis spinalis because of its sharp keen tip and biggish dynamics Spinal cord or nerve root break through centrum damage peripheral vessels, internal organs etc. outward, cause severe complication, if adjusting screw way repeatedly, hold Easily cause screw way bony defect, directly affects the merging and its fastness of pedicle screw.Especially osteoporosis severe patient, In kyphoscoliosis patient, children's spinal operation patient, thoracic vertebrae and Pedicle Screw Placement in Lower Cervical implantation, pedicle screw Reliable merging difficulty further increases.In recent years, in conjunction in art CT be imaged three-dimensional navigation technology, can raising by a relatively large margin set Enter the accuracy of pedicle screw, but about 10,000,000 yuan of its cost of equipment, it is very expensive, and CT scan certainly will increase radiation in art Amount, operating time and amount of bleeding, usual surgical doctor and patient can not receive, it is difficult to popularize.

Utility model content

The technical problems to be solved in the utility model is to overcome the deficiencies of the prior art and provide that a kind of structure is simple, uses It is convenient, the incidence for breaking through cortical bone can be reduced, the pedicle screw open circuit guide instrument of the generation of complication is reduced.

In order to solve the above technical problems, the utility model uses following technical scheme:

A kind of pedicle screw open circuit guide instrument, including rod-like element, the rod-like element include holding section and guidance Section, the boot segment is vertebra shape and tip is equipped with bulb, and the other end is connected with the holding section, is equipped with and is used in the boot segment Limitation boot segment enters the depth-limiting mechanism of centrum depth.

As a further improvement of the above technical scheme: the depth-limiting mechanism includes restriction plate and adjusting rod, the holding The first axially disposed adjustment hole is equipped in section, one end that the boot segment is connected with the holding section is equipped with axially disposed The second adjustment hole, second adjustment hole far from it is described hold section one end be equipped with axially disposed adjusting through slot, it is described Adjusting rod one end is located at outside first adjustment hole, and the other end sequentially passes through first adjustment hole and second adjustment hole simultaneously It extends in the adjusting through slot, is actively sheathed on the adjusting rod in the middle part of the restriction plate and is located in the adjusting through slot One end, limitation board ends extend to outside the adjusting through slot, and the inner wall of first adjustment hole and/or second adjustment hole is set There is internal screw thread, the adjusting rod periphery is equipped with the external screw thread with the screw-internal thread fit, and the adjusting rod is in the restriction plate two Side is equipped with the locating part for being used to prevent restriction plate from moving axially along adjusting rod.

As a further improvement of the above technical scheme: the locating part is stop collar and is set to the tune by thread bush On pole.

As a further improvement of the above technical scheme: the boot segment periphery is equipped with deep identification.

As a further improvement of the above technical scheme: the boot segment is cone shape, and the holding section is prism-shaped, The rib number for holding section is n, then 4≤n≤8.

Compared with the prior art, the advantages of the utility model are: pedicle screw disclosed by the utility model is opened Road guide instrument, the bulb of the tip setting passivity of boot segment, can use lesser strength, be entered by the cancellous bone of pedicle of vertebral arch Road is not easy to break through cortical bone, avoids damage to the nerve and blood vessel of surrounding, and multiple channel is avoided to prepare to cause channel diameter excessive, Screw loosening even can not be placed in pedicle screw, the channel for establishing pedicle screw that can be simpler, easy to learn, safe, convenient The merging of pedicle screw saves operating time, reduces the incidence of complication.Boot segment, which is limited, by depth-limiting mechanism enters vertebra The depth of body can operate with different patients, enhances the safety of individuation patients surgery, prevents pedicle screw Path Setup mistake Cheng Zhong, boot segment front end break through cortical bone in front of centrum and cause the damages of peripheral vessels, internal organs.

Detailed description of the invention

Fig. 1 is the schematic perspective view at the utility model pedicle screw open circuit the first visual angle of guide instrument.

Fig. 2 is the schematic perspective view at the utility model pedicle screw open circuit the second visual angle of guide instrument.

Fig. 3 is the enlarged drawing in Fig. 2 at A.

Each label indicates in figure: 1, holding section；11, the first adjustment hole；2, boot segment；21, the second adjustment hole；22, it adjusts Through slot；23, deep identification；3, bulb；4, depth-limiting mechanism；41, restriction plate；42, adjusting rod；421, locating part.

Specific embodiment

The utility model is described in further detail below in conjunction with Figure of description and specific embodiment.

Fig. 1 to Fig. 3 shows an embodiment of the present invention, and the pedicle screw of the present embodiment, which is opened a way, to be guided Instrument, including rod-like element, material can be stainless steel etc., and light intensity is big, and rod-like element includes holding section 1 and boot segment 2, boot segment 2 is vertebra shapes and tip is equipped with bulb 3, and the other end is connected with section 1 is held, and is equipped in boot segment 2 and is used to limit boot segment 2 into vertebra The depth-limiting mechanism 4 of body depth.In the present embodiment, boot segment 2 is cone shape, is entered in centrum convenient for boot segment 2, tip diameter exists 1mm or so, other end diameter is in 2.5mm or so；Holding section 1 is then prism-shaped, and diameter is in 4mm, and the rib number for holding section 1 is n, then 4≤n≤8, namely section 1 is held using quadrangular to eight prisms, it convenient for doctor's operation, while being also easy to process, preferably pentagonal prism Or hexagonal prisms；3 diameter 1.5mm of bulb or so, pedicle for cervical vertebra arch is smaller, may be designed as about 0.5~1.0mm.

Further, depth-limiting mechanism 4 includes restriction plate 41 and adjusting rod 42, holds and is equipped in section 1 along axial direction (in attached drawing 1 For up and down direction) the first adjustment hole 11 of arrangement, boot segment 2 with hold one end (in attached drawing 1 be upper end) that section 1 is connected equipped with edge The second adjustment hole 21 axially arranged, the second adjustment hole 21 are equipped with far from the one end (being lower end in attached drawing 1) for holding section 1 along axial direction The adjusting through slot 22 of arrangement, 42 one end of adjusting rod is located at the first adjustment hole 11 outer (42 upper end top of adjusting rod in attached drawing 1), another End (being lower end in attached drawing 1), which sequentially passes through the first adjustment hole 11 and the second adjustment hole 21 and extends to, to be adjusted in through slot 22, limitation 41 middle part of plate is actively sheathed on adjusting rod 42 and is located at the one end adjusted in through slot 22, since restriction plate 41 will receive adjusting through slot 22 limitation can not rotate, and convenient for the rotation of the relatively restricted plate 41 of adjusting rod 42,41 both ends of restriction plate extend to this fit system It adjusts outside through slot 22, so that the depth capacity that boot segment 2 enters centrum is controllable, in the present embodiment, the inner wall of the first adjustment hole 11 Equipped with internal screw thread, 42 periphery of adjusting rod is equipped with the external screw thread with screw-internal thread fit, and adjusting rod 42 is equipped in 41 two sides of restriction plate and uses Come the locating part 421 for preventing restriction plate 41 from moving axially along adjusting rod 42.Certainly, in other embodiments, can also be adjusted second Internal screw thread is arranged in 21 inner wall of knothole, or is respectively provided with internal screw thread in the first adjustment hole 11 and 21 inner wall of the second adjustment hole.Work as needs When adjusting the distance between restriction plate 41 and bulb 3,42 upper end of rotation adjusting lever is realized that adjusting rod 42 is axially moveable, is adjusted Bar 42 drives restriction plate 41 to be axially moveable by two locating parts 421 in turn, and structure is simple, reliable, easy to adjust, continuous.

Further, in the present embodiment, locating part 421 is stop collar and is set on adjusting rod 42 by thread bush, just Assembly, maintenance in instrument.

Further, in this embodiment 2 periphery of boot segment is equipped with deep identification 23.It can be by deep identification 23 intuitively The depth that boot segment 2 enters centrum is observed, it is more convenient to use.

In other embodiments, conical sleeve can also be used in depth-limiting mechanism 4, is then fixed on sleeve using holding screw It on boot segment 2, can also realize that limit is deep, be disadvantageous in that since boot segment 2 is taper, so that the structure cannot achieve continuous tune Section.

Although the utility model has been disclosed with preferred embodiment as above, it is not intended to limit the utility model.It is any Those skilled in the art, in the case where not departing from technical solutions of the utility model range, all using the disclosure above Technology contents many possible changes and modifications are made to technical solutions of the utility model, or be revised as the equivalent of equivalent variations Embodiment.Therefore, all contents without departing from technical solutions of the utility model, according to the utility model technical spirit to the above reality Any simple modifications, equivalents, and modifications that example is done are applied, should all be fallen in the range of technical solutions of the utility model protection.

Claims (5)

1. The guide instrument 1. a kind of pedicle screw is opened a way, it is characterised in that: including rod-like element, the rod-like element includes holding Section (1) and boot segment (2), the boot segment (2) is vertebra shape and tip is equipped with bulb (3), the other end and holding section (1) phase Even, it is equipped in the boot segment (2) and is used to limit the depth-limiting mechanism (4) that boot segment (2) enter centrum depth.
2. The guide instrument 2. pedicle screw according to claim 1 is opened a way, it is characterised in that: the depth-limiting mechanism (4) include restriction plate (41) and adjusting rod (42), be equipped with axially disposed the first adjustment hole (11) in holding section (1), The boot segment (2) and described one end for being connected of holding section (1) are equipped with axially disposed the second adjustment hole (21), and described second Adjustment hole (21) is equipped with axially disposed adjusting through slot (22), the adjusting rod (42) far from described one end for holding section (1) One end is located at first adjustment hole (11) outside, and the other end sequentially passes through first adjustment hole (11) and second adjustment hole (21) it and extends in the adjusting through slot (22), is actively sheathed on the adjusting rod (42) position in the middle part of the restriction plate (41) One end in adjusting through slot (22), restriction plate (41) both ends extend to the adjusting through slot (22) outside, and described first adjusts The inner wall of knothole (11) and/or second adjustment hole (21) be equipped with internal screw thread, adjusting rod (42) periphery be equipped with it is described The external screw thread of screw-internal thread fit, adjusting rod (42) Yu Suoshu restriction plate (41) two sides, which are equipped with, to be used to prevent restriction plate (41) edge The locating part (421) of adjusting rod (42) axial movement.
3. The guide instrument 3. pedicle screw according to claim 2 is opened a way, it is characterised in that: the locating part (421) it is set on the adjusting rod (42) for stop collar and by thread bush.
4. The guide instrument 4. pedicle screw according to any one of claim 1 to 3 is opened a way, it is characterised in that: institute Boot segment (2) periphery is stated equipped with deep identification (23).
5. The guide instrument 5. pedicle screw according to any one of claim 1 to 3 is opened a way, it is characterised in that: institute Stating boot segment (2) is cone shape, and the holding section (1) is prism-shaped, and the rib number for holding section (1) is n, then 4≤n≤8.