TABLE 1.
SUMMARY OF PATIENT GENDER, AGE, CONDITION, STATUS OF PREVIOUS SURGERY, TYPE OF SURGERY, AND THE EXPOSED VERTEBRAE LEVELS (THE TOTAL NUMBER OF VERTEBRAL SEGMENTS EXPOSED ARE SHOWN IN PARENTHESIS). THE ESTIMATED REGISTRATION ERROR REPORTED FROM THE STEALTHSTATION USING THE POINT-WISE LANDMARK APPROACH IS ALSO SHOWN.
| Patient (gender/age) | Condition | Previous surgery with bone removed? | Type of surgery | Exposed vertebrae | S7 Registration error (mm) |
|---|---|---|---|---|---|
| 1 (M/76) | L3–5 stenosis with L4–5 spondylolisthesis | No | L3–5 laminectomy and L4–5 instrumented fusion | L3–L5 (3) | 1.65 |
| 2 (M/29) | L1 fracture | No | T12-L2 laminectomy and T10-L3 instrumented fusion | T10–T12, L1–L3 (6) | 2.16 |
| 3 (F/50) | L4–5 spondylolisthesis | No | L4–5 instrumented fusion | L4, L5 (2) | 2.76 |
| 4 (F/67) | L4–5 spondylolisthesis (prior L4–5 hemilaminotomies) | Yes1 | L4–5 instrumented fusion | L3–L5 (3) | 2.29 |
| 5 (M/44) | T6 fracture | No | T3–T8 instrumented fusion | T2–T8 (7) | 3.08 |
| 6 (M/69) | L2–4 stenosis and scoliosis | Yes2 | L2–5 laminectomy and instrumented fusion | L1–L3 (3) | 1.65 |
| 7 (M/64) | L4–5 spondylolisthesis | No | L4–5 instrumented fusion with interbody cage | L3–L5 (3) | 2.15 |
| 8 (F/61) | L5–L6 spondylolisthesis (supranumerary lumbar vertebra) | No | L5–6 instrumented fusion with interbody cage | L5, L6 (2) | 3.31 |
1
Prior L4–5 hemilaminotomies;
2
Prior L4–5 laminectomy and instrumented fusion