Intradermal positioning device for lumbar vertebra minimally invasive surgery

[0020] Embodiment 1: as Figure 1-2 As shown in the figure, the locator 1 has a pointed tip inside the skin and a flat tip outside the skin, and several hollow channels for the insertion of the Kirschner wire 2 for intraoperative positioning. like Figure 3-Figure 8 As shown, (this part is better described in conjunction with the figure) according to the position of the pedicle marked on the body surface, the patient's fat and thin, and the head tilt angle of the vertebral body, open 1-1.5cm beside the marked position of the pedicle screw on the body surface Make a skin incision of about 1cm on the left and right (such as image 3 ), inserted into the intradermal positioning device after step-by-step expansion ( Figure 4 ), and then inject 3-4 pieces of Kirschner wires from each intradermal positioning device, carry out positive and lateral X-ray fluoroscopy, and select the appropriate Kirschner wires for puncture positioning ( Figure 5 ), remove the remaining Kirschner wires ( Image 6 ). If there is no suitable Kirschner wire, leave the Kirschner wire closest to the satisfactory position ( Figure 7 ), and then adjust the position through the intradermal positioning device and select the appropriate Kirschner wire for positioning ( Figure 8 ).

[0021] Work process of the present invention is as follows:

[0022] A: Insert the intradermal positioning device after step-by-step expansion;

[0023] B: Insert 3-4 pieces of Kirschner wires into each intradermal positioning device, and perform positive and lateral X-ray fluoroscopy;

[0024] C: Select a Kirschner wire at a suitable position for puncture positioning;

[0025] D: The red mark in the figure is a suitable Kirschner wire;

[0026] E: If there is no suitable Kirschner wire, leave the Kirschner wire closest to the satisfactory position;

[0027] F: Adjust the position through the intradermal positioning device and select the appropriate Kirschner wire for positioning.

[0028] Embodiment 2: The inventor has done relevant clinical research on the locator. In 121 patients with lumbar disc herniation combined with lumbar instability and thoracolumbar fractures, the traditional method was compared with the new method. The positioning time was 15.12±4.69min, and the positioning times were 6.47 times. However, the positioning time of the new method using the locator is 5.51±1.32min, and the number of positioning is 2.45 times.