Anteroposterior X-ray fluoroscopy guided-nail-entering pedicle screw guiding device and method

Abstract

The invention relates to an anteroposterior X-ray fluoroscopy guided-nail-entering pedicle screw guiding device and method. The guiding device comprises a spinous process fixing device, a transverse connecting rod and a positioning device, the upper end of the spinous process fixing device is arranged on two sides of the transverse connecting rod in a sleeved manner, and the upper end of the positioning device is arranged on the transverse connecting rod in a sleeved manner; the positioning device comprises a first adjuster, a second adjuster, a third adjuster, a first connecting rod, a second connecting rod and a positioning needle, the first adjuster is arranged on the transverse connecting rod in a sleeved manner, one end of the first connecting rod is embedded in the first adjuster while the other end of the same is penetratingly arranged in the second adjuster, two ends of the second connecting rod are respectively embedded in the second adjuster and the third adjuster in one-to-one corresponding manner, and the positioning needle is penetratingly arranged in the third adjuster; the positioning needle comprises a metal needle and an extension rod, one end of the metal needle is connected with one end of the extension rod, the other end of the metal needle and the other end of the extension rod are free ends respectively, and length of the metal needle is equal to that of pedicle.

Description

technical field [0001] The invention relates to a medical surgical instrument, in particular to a pedicle screw guide and a guiding method for guiding screw insertion through an anteroposterior X-ray perspective. Background technique [0002] The safety and accuracy of pedicle screw placement are directly related to the success or failure of spinal surgery and the efficacy of patients. There is still a certain error rate in the empirical nail placement technique relying solely on anatomical landmarks, especially in cases with unclear or variable anatomy, which may bring more difficulties. Therefore, clinicians will use related equipment to further navigate the direction of screw insertion when placing screws intraoperatively. At present, the most advanced navigation equipment includes O-Arm, computer navigation system, CT and electrophysiological monitor, etc. These equipment have greatly improved the safety of nail placement, but they are expensive and have high requiremen...

AI Technical Summary

Problems solved by technology

2. Most of the components of the guide have large differences in shape, complex processing, increased cost, and limited production and application

3. Most of them are metal components. Because metal can absorb a large amount of X-rays, the quality of X-ray fluoroscopy images during the operation is poor, and it is difficult to determine the projection image of the positioning needle.

4. Most of the above-mentioned guides can only guide one or a pair of screws on the same horizontal plane at a time, and it does not show the characteristics of easy operation and less radiation absorption for multiple sets of screws, so it is not very effective in long-segment screw placement. Well reflect its application value

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