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Table 3: Aqueductal stroke volume, peak velocity, and aqueductal area in patients at all assessment times^{^a}
Patient Baseline (n = 21) Patient Preop (n = 16) Patient Postop (n = 17) P Value
ACSV (μL) 103.5 (69.8–142.8) 94.8 (81–241) 88 (51.8–173.3) <.05^{^b}
Peak velocity (mm/s) 103 (68.5–166.5) 127 (72.5–154.8) 108 (71.5–146.5) NS
Net flow (μL) −1.6 (−19–14) −1.8 (−14.5–10.8) 0 (−12.5–2.1) NS
Aq area (mm²) 22 (19–25) 22.5 (19.3–25.8) 24 (20.5–25.5) NS
Note:—Preop indicates preoperative; Postop, postoperative; Aq, aqueductal; NS, not signifiicant.
↵a Data are median with interquartile range in parentheses.
↵b Wilcoxon signed rank test. Significant difference between baseline and postoperative investigation and between preoperative and postoperative investigation. Comparisons between baseline and preoperative measurements were all nonsignificant.