A pedicle screw screw rod internal fixation device with positioning tip as inner core

A pedicle screw and fixation device technology, applied in the field of pedicle screws, can solve problems such as cerebrospinal fluid leakage, pedicle screw track deviation, and prolonged operation time, so as to protect medical staff, reduce intraoperative injuries, and speed up operation. The effect of operation time

Active Publication Date: 2022-07-22
THE AFFILIATED SIR RUN RUN SHAW HOSPITAL OF SCHOOL OF MEDICINE ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the screw is placed by hand, the displacement of the screw track is likely to cause the deviation of the track of the pedicle screw. In severe cases, the spinal cord and nerve root may be stimulated by the pedicle screw breaking into the spinal canal, causing catastrophic symptoms such as cerebrospinal fluid leakage, nerve root paralysis, or paraplegia. as a result of
In addition, repeated fluoroscopy during the operation prolongs the entire operation time and increases the risk of infection during the operation; the other is the percutaneous Sextant pedicle screw internal fixation system produced by the foreign shufamo company. Its pedicle screw Part is hollow design, but the U-shaped part at the top is short, which is not conducive to the placement of connecting rods

Method used

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  • A pedicle screw screw rod internal fixation device with positioning tip as inner core
  • A pedicle screw screw rod internal fixation device with positioning tip as inner core
  • A pedicle screw screw rod internal fixation device with positioning tip as inner core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] like figure 1 As shown, a pedicle screw screw rod internal fixation device with a positioning tip as the inner core includes a connecting rod 1 , two pedicle screw main bodies 2 , two locking screws 3 and two pins 4 . In use, the two pedicle screw main bodies 2 are arranged on the connecting rod 1 at intervals, and are respectively fixed to the connecting rod 1 by corresponding locking screws 3 . The connecting rod 1 is cylindrical; the side surface of the connecting rod 1 is sequentially arranged with circular scale lines 1-1 along the length direction, and is provided with scale marks, which is convenient for doctors to quickly read the two pedicle screw main bodies 2 the distance between. One end of the pin 4 is sharp, and can be inserted into the part of the patient where the pedicle screw needs to be implanted in advance, so as to provide positioning for the main body 2 of the pedicle screw.

[0028] like figure 2 , 3 , 4 and 5 , the pedicle screw main body 2 ...

Embodiment 2

[0040] like Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that the disengagement part 5 of the pedicle screw main body 2 and the locking part 6 are not connected by screwing. The disengaging part 5 is arranged on the outer side of the locking part 6 and is composed of an integrally formed outer fixing ring 5-1 and two disengaging ears 5-2. The inner ends of the two disengaging ears 5-2 and the outer ends of the two locking ears 6-2 are integrally formed through the fractured connecting portion 2-1, respectively. A breaking groove is provided on the outer side of the break-mark connecting portion 2-1; the doctor can break the connection between the disengaging portion 5 and the locking portion 6 by squeezing from the outside.

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Abstract

The invention discloses an internal fixation device of a pedicle screw screw rod with a positioning tip as an inner core. The present invention includes a connecting rod, a pedicle screw body and a pin. The connecting rod is cylindrical; scale lines are arranged on the side surface of the connecting rod. The main body of the pedicle screw includes a disengagement part, a locking part and a screw part which are connected in sequence. The locking portion includes a locking disc and two locking lugs. The two locking lugs are respectively connected with the two side edges of the locking disc. When mounted on the body, the connecting rod is located between the two locking ears. The locking portion can be fixed and disengaged from different positions of the connecting rod. The outer end portion of the screw portion is sharp. The main body of the pedicle screw is provided with a central hole penetrating the screw portion and the locking disc for matching with the pin. The disengagement portion can be separated from the locking portion.

Description

technical field [0001] The invention belongs to the technical field of pedicle screws, and in particular relates to a pedicle screw screw rod internal fixation system with a positioning tip as the inner core, which is mainly applied to thoracolumbar fractures, intervertebral disc herniation, spinal stenosis and spinal deformity , spinal infections, spinal tumors and other orthopedic surgical diseases that require internal fixation with a screw-rod system. Background technique [0002] At present, there are two types of pedicle screws that have been publicly used at home and abroad: one is conventional pedicle screws, such as GSS thoracolumbar internal fixation system, USS screw rod system, and domestic systems of Kehui and Weigao, etc. For solid screws, when the pedicle screw is placed by PLIF, TLIF or MIS-TLIF minimally invasive surgery, there is a lack of guiding signs during the operation, and repeated fluoroscopy with a C-arm X-ray machine is required. Manual placement ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/70
CPCA61B17/7034A61B17/7002
Inventor 谢子昂徐文斌宁磊范顺武
Owner THE AFFILIATED SIR RUN RUN SHAW HOSPITAL OF SCHOOL OF MEDICINE ZHEJIANG UNIV
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