Minimally invasive removal of a deep-positioned cannulated screw from the femoral neck: A case report

Figure 1 Preoperative data. A: Preoperative general picture of both lower limbs; B: Preoperative anteroposterior pelvic radiograph; C: Preoperative lateral view of the left hip joint; D: Preoperative coronal computed tomography scan; E: Preoperative three dimensional reconstruction of the left femoral neck; F: Preoperative three dimensional reconstruction of the pelvis.

Figure 2 Intraoperative imaging and postoperative pelvic computed tomography. A: Intraoperative fluoroscopy revealed that the cannulated screw was inserted too deeply; B: A self-made steel sternal wire was used to facilitate removal of the cannulated screw; C: Removal of the overlong cannulated screw and the self-made steel sternal wire with a hook; D: Postoperative posteroanterior radiograph; E: Postoperative lateral view; F: Postoperative pelvic computed tomography film showed effusion.

Figure 3 Process of removing the overly deep-placed cannulated screw and the use of the improved screwdriver for cannulated screws. A: Inserting the excessively deep-placed screw; B: Using the self-made tool of steel sternal wire with bending and illustration for removal; C: Depth positioning using the scaled screwdriver before inserting the screw; D: Inserting the cannulated screw into the previously determined position with the scaled screwdriver.