Percutaneous lumbar vertebra foramen intervertebrale endoscope puncture locator

Abstract

A percutaneous lumbar vertebra foramen intervertebrale endoscope puncture locator is composed of a fixed support, a triple-action connector, a parallel adjusting rod, a puncture guide plate sliding base, a puncture guide plate, a fixed locating pin and a sliding locating pin. The puncture locator has the advantages that on one hand, whether an obstacle and a puncture target exist in a puncture path or not is determined by using images of the C arm perspective fixed locating pin during an operation, whether the bottom edge of a virtual triangle and the puncture target are on the same plane or overlap is determined by using the position of the C arm perspective sliding locating pin, and puncture accuracy is improved through front side location of the fixed locating pin and the sliding locating pin; on the other hand, only the puncture angle needs to be measured before the operation and changes little along with the body position, so that variable parameters are reduced, and errors are reduced.

Description

technical field [0001] The invention relates to a surgical instrument, in particular to a percutaneous lumbar intervertebral foramen puncture locator. Background technique [0002] The existing percutaneous lumbar intervertebral foraminal puncture locator is composed of a fixed bracket, a vernier protractor, an intervertebral foramen locating block, a distance measuring rod, a puncture sleeve, a compass and the like. The puncture angle, puncture depth, and the distance from the puncture point to the spinous process were measured using the principle of right-angle trigonometric function on the bone window of the patient's preoperative CT film. This kind of data measurement has three disadvantages in the actual operation during the operation: on the one hand, the vertical depth between the intervertebral foramen positioning block and the intervertebral foramen cannot be measured during the operation, so there is a predetermined designed puncture path in the blind operation. C...

AI Technical Summary

Problems solved by technology

Such data measurement has three shortcomings in the actual operation: on the one hand, the vertical depth from the intervertebral foramina positioning block to the intervertebral foramen cannot be measured during the operation, so there is a predetermined design puncture path in blind operation. The vertical depth between the intervertebral foramina changes

On the other hand, the preoperative CT of the patient was taken in the supine position, and the patient was in the prone position during the operation, and the waist measurement parameters changed with the body position. It was difficult to control the distance during the operation. , the reference value of preoperative CT data in the supine position decreased during the operation

Secondly, the puncture angle, puncture depth, and distance from the puncture point to the spinous process are measured using the principle of right-angle trigonometric functions. If a puncture is unsuccessful, the puncture angle or other parameters need to be adjusted. The distance from the puncture point to the spinous process should be adjusted during the puncture process. The adjustment process is complex and time-consuming, and requires off-stage auxiliary calculations to adjust the data

This operation is inconvenient, which not only increases the operation time, but also easily leads to unsatisfactory placement of the working tube, resulting in poor operation results, and repeated fluoroscopy increases the radiation dose of doctors and patients.

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