CN204600661U

CN204600661U - Piston type dicyclo pivot cone Odontoid process sight

Info

Publication number: CN204600661U
Application number: CN201520222239.3U
Authority: CN
Inventors: 冀旭斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-04-14
Filing date: 2015-04-14
Publication date: 2015-09-02
Anticipated expiration: 2025-04-14

Abstract

This utility model relates to a kind of medical apparatus and instruments, specifically a kind of piston type dicyclo pivot cone Odontoid process sight for guiding hollow screw to locate in fracture of odontoid process of vertebra dentata treatment.The sighting device comprising hollow guiding pipe and be connected on hollow guiding pipe, described sighting device comprises the inner sleeve and outer sleeve that arrange with one heart, connected by the rotating shaft of decussation between described inner sleeve and outer sleeve and hollow guiding pipe, described rotating shaft is by can relatively to rotate and the coaxial inner sleeve that arranges and trocar sheath suit form.This sight structure is simple, easy to use, accurate positioning quick, may be used for guiding Kirschner wire accurately to locate in fracture of odontoid process of vertebra dentata treatment, thus improves surgical quality, reduces surgical error, reduces the misery of patient.

Description

Piston type dicyclo pivot cone Odontoid process sight

Technical field

This utility model relates to a kind of medical apparatus and instruments, specifically a kind of piston type dicyclo pivot cone Odontoid process sight for guiding hollow screw to locate in fracture of odontoid process of vertebra dentata treatment.

Background technology

Fracture of odontoid process of vertebra dentata is the common fracture of cervical vertebra, accounts for 10% ~ 14% of fracture of cervical vertebra.The odontoid fracture disunion rate that untreated or malpractice cause is 42-72%, and it is fixed to there is potential atlanto-axial instability simultaneously, the acute of brain stem, spinal cord or nerve root or chronic injury may be caused, cause serious quadriplegia, respiratory dysfunction, even dead.Therefore active treatment is answered to the patient of fracture of odontoid process of vertebra dentata.Since reported first in 1981 adopts the direct treatment of internal fixation of odontoid fracture of screw, clinical practice confirms, compared with traditional Therapeutic Method, this technology not only can rebuild the stability of articulatio atlantoepistrophica, can also retain the activeness of articulatio atlantoepistrophica to greatest extent, operation wound is little, and union of fracture rate is high, and obviously improve patients ' life quality, think that this technology is the first-selection of odontoid fracture operative treatment.Although the curative effect of anterior screw treatment of internal fixation of odontoid fracture obtains certainly clinically, but in the past owing to mainly operating by rule of thumb, guiding Kirschner wire needs repeatedly to adjust, operation randomness is large, even may produce serious complication, comprise screw extraction, displacement fracture, nonunion or screw tapping Odontoid process and injure spinal cord etc.Chinese patent 2012102768399 discloses one " pivot cone Odontid screw sight ", its two shrinking connecting-rods adopting nut to regulate to be arranged on hollow guiding pipe thus change the sensing of hollow guiding pipe, two shrinking connecting-rods are connected on vernier control plate, and vernier control plate is connected with support bar by ball-joint.This pivot cone Odontid screw sight may be used for guiding Kirschner wire accurately to locate in fracture of odontoid process of vertebra dentata treatment, thus improves surgical quality, reduces surgical error, reduces the misery of patient.But in operation process, owing to needing the position that regulates numerous, and regulate each point of adjustment interrelated, often need repeatedly to adjust and just can reach requirement, affect operation progress.In addition, the length of the shrinking connecting-rod that nut regulates is difficult to accurate metering, the position that shrinking connecting-rod is connected on vernier control plate is also uncertain, and this pivot cone Odontid screw sight can not use coordinate data record position, cannot repetition perform the operation in the past in location.

Summary of the invention

The purpose of this utility model is to provide that a kind of structure is simple, easy to use, governing speed is fast, available coordinate locative piston type dicyclo pivot cone Odontoid process sight, for guiding Kirschner wire accurately to locate in fracture of odontoid process of vertebra dentata treatment, thus raising surgical quality, reduce surgical error, reduce the misery of patient.

The technical scheme that this utility model adopts for technical solution problem is:

The sighting device that piston type dicyclo pivot cone Odontoid process sight described in the utility model comprises hollow guiding pipe and is connected on hollow guiding pipe, described sighting device comprises the inner sleeve and outer sleeve that arrange with one heart, the external diameter of described inner sleeve is less than the internal diameter of outer sleeve, the external diameter of described hollow guiding pipe is less than the internal diameter of inner sleeve, be symmetrically arranged with left half axle and right axle shaft between the outer wall of hollow guiding pipe and the inner ring surface of inner sleeve, described left half axle and right axle shaft coaxially arrange and the axis of left half axle and right axle shaft by the center of circle of inner sleeve; Be provided with semiaxis and lower semiaxis between the outer ring surface of described inner sleeve and the inner ring surface of outer sleeve, described upper semiaxis and lower semiaxis coaxially arrange and the axis of upper semiaxis and lower semiaxis by the center of circle of inner sleeve; The axis of upper semiaxis and lower semiaxis and the axes normal of left half axle and right axle shaft; Described upper semiaxis, lower semiaxis, left half axle and right axle shaft are by can relatively to rotate and the coaxial inner sleeve that arranges and trocar sheath suit form; One end of described trocar sheath connects inner sleeve by rotatable snap ring, the other end of trocar sheath is fixedly connected on hollow guiding pipe or outer sleeve, the inner chamber of trocar sheath is the taper blind hole that outer imperial palace is little, and the upper end of described blind hole is with the pore inside and outside connection; Described inner sleeve is the annular hollow pipe being connected air pump by high-pressure air pipe, one end of described inner sleeve is fixedly connected on inner sleeve and with the tube chamber of inner sleeve and is communicated with, in the inner chamber of inner sleeve, piston is installed, the inner of described piston (81) can axially movably be arranged in the inner chamber of inner sleeve, and the outer end of piston is arranged in the inner chamber of trocar sheath and the vertebra shape body matched.

The outer tube wall of described inner sleeve and trocar sheath joining place is provided with the scale representing relative position; With two boss be arranged in parallel in the inner chamber of described inner sleeve, the inner of described piston is the cylinder between described two boss.

After adopting technique scheme, this sight regulates the sensing of guide pipe by dicyclic sighting device, structure is simple, easy to use, governing speed is fast and available coordinate represents position, the details of convenient quantitatively record operation technique, utilizes coordinate can location in repetition operation; Use hollow guide device to make location Kirschner wire major part be positioned at guider, be convenient to controlling party to, avoid it bending and the illusion that causes inserting needle suitable; Use air pressure control piston fixation hollow guider, location action is fast, fixes reliable, and accurately the rear position in location and location is fixed, and decreases inserting needle repeatedly, improves the accuracy that screw enters; Do not need to implant staple on Cervical vertebra and stationary links is firmly secured to operation table, fixing reliable.

Accompanying drawing explanation

Fig. 1 is the Facad structure schematic diagram of this utility model embodiment.

Fig. 2 is the sectional structure schematic diagram of upper semiaxis.

Detailed description of the invention

As shown in Figure 1, the sighting device that piston type dicyclo pivot cone Odontoid process sight described in the utility model comprises hollow guiding pipe 1 and is connected on hollow guiding pipe 1, described sighting device comprises the inner sleeve 2 and outer sleeve 3 that arrange with one heart, the external diameter of described inner sleeve 2 is less than the internal diameter of outer sleeve 3, the external diameter of described hollow guiding pipe 1 is less than the internal diameter of inner sleeve 2, left half axle 5 and right axle shaft is symmetrically arranged with between the outer wall of hollow guiding pipe 1 and the inner ring surface of inner sleeve 2, described left half axle 5 and right axle shaft coaxially arrange and the axis of left half axle 5 and right axle shaft by the center of circle of inner sleeve 2, be provided with semiaxis 6 and lower semiaxis 7 between the outer ring surface of described inner sleeve 2 and the inner ring surface of outer sleeve 3, described upper semiaxis 6 and lower semiaxis 7 coaxially arrange and the axis of upper semiaxis 6 and lower semiaxis 7 by the center of circle of inner sleeve 2, the axis of upper semiaxis 6 and lower semiaxis 7 and the axes normal of left half axle 5 and right axle shaft, described upper semiaxis 6, lower semiaxis 7, left half axle 5 and right axle shaft are by can relatively to rotate and the coaxial inner sleeve 8 that arranges and trocar sheath 9 suit form.

During use, hollow guiding pipe 1 can swing up and down centered by left half axle 5 and right axle shaft on inner sleeve 2, can swing centered by inner sleeve more than 2 semiaxis 6 and lower semiaxis 7, and the comprehensive guiding that so just can realize hollow guiding pipe 1 is arranged.

Certainly, conveniently using, can also connecting plate 10 and Connection Block 11 being set on outer sleeve 3, for being fixedly connected on various support.

Described inner sleeve 2 is the annular hollow pipes being connected air pump by high-pressure air pipe, inner sleeve 2 is provided with valve cock 13, and connects high-pressure air pipe by this valve cock 13.Upper semiaxis 6, lower semiaxis 7, left half axle 5 are identical with the structure of right axle shaft, above semiaxis 6 is example, as shown in Figure 2, one end of described trocar sheath 9 connects inner sleeve 8 by rotatable snap ring, the other end of trocar sheath 9 is fixedly connected on hollow guiding pipe 1 or outer sleeve 3, the inner chamber of trocar sheath 9 is taper blind holes 91 that outer imperial palace is little, and the upper end of described blind hole 91 is with the pore 92 inside and outside connection; Described inner sleeve 2 is the annular hollow pipes being connected air pump by high-pressure air pipe, one end of described inner sleeve 8 to be fixedly connected on inner sleeve 2 and to be communicated with the tube chamber of inner sleeve 2, piston 81 is installed in the inner chamber of inner sleeve 8, the inner of described piston 81 can axially movably be arranged in the inner chamber of inner sleeve 8, and the outer end of piston 81 is arranged in the inner chamber of trocar sheath 9 and the vertebra shape body matched.When air pump is inflated to inner sleeve 2 by high-pressure air pipe and valve 13, piston 81 ejects, and the cone of its outer end is close on the inwall of trocar sheath 9, is fixed the position of trocar sheath 9 with inner sleeve 8; Otherwise when air pump produces negative pressure by high-pressure air pipe and valve 13 in inner sleeve 2 time, the pore on trocar sheath 9 is in communication with the outside, the pressure of blind hole 91 upper end is greater than the pressure in inner sleeve 2, piston 81 resilience, and trocar sheath 9 and inner sleeve 2 can rotate freely.

The outer tube wall of described inner sleeve 8 and trocar sheath 9 joining place is provided with the scale representing relative position.After the sensing position of hollow guiding pipe 1 is fixing, the angle recording inner sleeve 8 rotation relative to trocar sheath 9 on each semiaxis can determine the position coordinates of hollow guiding pipe 1.With two boss 82,83 be arranged in parallel in the inner chamber of described inner sleeve 8, the inner of described piston 81 is the cylinder between described two boss.Like this, boss 82,83 can the motion amplitude that ejects of limited piston 81, improves the precision of locating speed and location.

During use, make patient lies supine position, after keeping neck, stretch position; To continue under skull traction C-arm X-ray machine just, position, side picture observes odontoid fracture and resets; With the mid point of C2 vertebral body lower edge for entry point, sight is in place; X-ray normotopia, position, side perspective, open air pump and produce negative pressure, handles hollow guiding pipe normotopia and be positioned at Odontoid process axis, summit after the subtend Odontoid process of position, side, after position is determined, opens air pump and produce high pressure by hollow guiding pipe locking position; With electric drill, 1.2mm Kirschner wire is squeezed into Odontoid process under guider guides, after positive lateral projection is errorless, by the hollow drill bit of external diameter 3.0 mm along Kirschner wire reaming, be screwed into the hollow spongy bone pressurization titanium screw that diameter is the appropriate length of 3.5 mm.

Claims

1. piston type dicyclo pivot cone Odontoid process sight, the sighting device comprising hollow guiding pipe (1) and be connected on hollow guiding pipe (1), it is characterized in that: described sighting device comprises the inner sleeve (2) and outer sleeve (3) that arrange with one heart, the external diameter of described inner sleeve (2) is less than the internal diameter of outer sleeve (3), the external diameter of described hollow guiding pipe (1) is less than the internal diameter of inner sleeve (2), left half axle (5) and right axle shaft is symmetrically arranged with between the outer wall of hollow guiding pipe (1) and the inner ring surface of inner sleeve (2), described left half axle (5) and right axle shaft coaxially arranges and the axis of left half axle (5) and right axle shaft by the center of circle of inner sleeve (2), be provided with semiaxis (6) and lower semiaxis (7) between the outer ring surface of described inner sleeve (2) and the inner ring surface of outer sleeve (3), described upper semiaxis (6) and lower semiaxis (7) are coaxially arranged and the axis of upper semiaxis (6) and lower semiaxis (7) passes through the center of circle of inner sleeve (2), the axis of upper semiaxis (6) and lower semiaxis (7) and the axes normal of left half axle (5) and right axle shaft, described upper semiaxis (6), lower semiaxis (7), left half axle (5) and right axle shaft are by can relatively to rotate and the coaxial inner sleeve (8) that arranges and trocar sheath (9) are set with and form, one end of described trocar sheath (9) connects inner sleeve (8) by rotatable snap ring, the other end of trocar sheath (9) is fixedly connected on hollow guiding pipe (1) or outer sleeve (3), the inner chamber of trocar sheath (9) is the taper blind hole (91) that outer imperial palace is little, and the upper end of described blind hole (91) is with the pore (92) inside and outside connection, described inner sleeve (2) is the annular hollow pipe being connected air pump by high-pressure air pipe, one end of described inner sleeve (8) is fixedly connected on inner sleeve (2) and goes up and be communicated with the tube chamber of inner sleeve (2), piston (81) is installed in the inner chamber of inner sleeve (8), the inner of described piston (81) can axially movably be arranged in the inner chamber of inner sleeve (8), and the outer end of piston (81) is arranged in the inner chamber of trocar sheath (9) and the vertebra shape body matched.

2. piston type dicyclo pivot cone Odontoid process sight according to claim 1, is characterized in that: the outer tube wall of described inner sleeve (8) and trocar sheath (9) joining place is provided with the scale representing relative position; With two boss be arranged in parallel (82,83) in the inner chamber of described inner sleeve (8), the inner of described piston (81) is the cylinder between described two boss.