Article Figures & Data
Figures
- Fig. 1
Illustration of the free-hand technique for iliac screw placement. Note that the probe shafts are parallel to the L5 lamina with both probes intersecting over the L5 spinous process. The screw entry point is adjacent to the PSIS.
- Fig. 2
Intraoperative photograph demonstrating the trajectory of both pedicle probes.
- Fig. 3
a) Post-operative CT scan of lumbosacral spine, axial view, demonstrating the trajectory of the iliac screws placed through the ilium. b) anterior-posterior post-operative x-ray illustrating a spinopelvic fixation construct.
Tables
- Table 1
Patient demographics and surgical characteristics for 10 consecutive patients with free hand iliac screw placement over a one year period.
Patient Age Sex Pathology Levels instrumented Post-opcomplications EBL (mL) Distance of screw above SN (mm) Diameter of screw (mm) Lengthof screw (mm) Acetabular violation 1 68 F FSI T11-ilium None 700 20 8.5 100 No 2 55 M Osteomyelities withpseudoarthosis atL4-S1 L2-IP None 900 15 9.5 110 No 3 66 M DLS T11-ilium None 1200 22 8.5 90 No 4 65 M DLS T9-ilium PE 850 13 8.5 90 No 5 53 M HGS L5-S1 L4-ilium None 300 19 8.5 100 No 6 72 F DLS T11-ilium None 700 20 8.5 90 No 7 57 F Metastases to L5 L2-ilium DVT 1000 22 8.5 90 No 8 74 F DLS T11-ilium None 900 18 8.5 100 No 9 59 M DLS T11-ilium None 750 20 8.5 100 No 10 63 M FSI T10-ilium DVT 850 16 8.5 90 No Abbreviations: DLS = degenerative lumbar spondylisthesis; DVT = deep venous thrombosis; EBL = estimated blood loss; F = female; FSI = fixed sagittal imbalance; HGS = high grade spondylisthesis; M = male; PE = pulmonary embolism; SN = sciatic notch.
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