Table 3.
Summary of Operating Room Time and Intraoperative Blood Loss
| Factor, unit No. levels treated | IPLF Only (n = 13) |
IPLF + TLIF (n = 83)a |
Overall (N = 96) |
|---|---|---|---|
| Operating room time, mean minutes (SD) | |||
| -1 | 235.0 (−) | 175.2 (33.1) | 179.4 (35.6) |
| -2 | 181.0 (42.9) | 168.5 (43.0) | 169.8 (42.7) |
| -3 | 195.5 (0.7) | 231.7 (54.4) | 228.8 (53.1) |
| -4 | 204.3 (21.4) | 220.0 (31.2) | 212.2 (25.4) |
| -5 | 307.0 (94.8) | – | 307.0 (94.8) |
| -All levels | 212.2 (58.7) | 189.7 (52.7) | 192.7 (53.8) |
| Intraoperative blood loss, mean mL (SD) | |||
| -1 | 700.0 (−) | 349.2 (221.8) | 376.2 (233.6) |
| -2 | 440.0 (260.8) | 461.7 (303.4) | 459.5 (296.8) |
| -3 | 650.0 (70.7) | 713.2 (435.2) | 707.9 (416.5) |
| -4 | 900.0 (458.3) | 650.0 (353.6) | 800.0 (393.7) |
| -5 | 500.0 (282.8) | – | 500.0 (282.8) |
| -All levels | 607.7 (317.4) | 519.4 (355.5) | 531.9 (350.1) |
Abbreviation: SD Standard deviation
a Among IPLF + TLIF surgeries, blood loss data were reported for 12 patients (92%) with single-level procedures, 22 patients (92%) with 3-level procedures, and 2 patients (66%) with 4-level procedures