Table 3:

Aqueductal stroke volume, peak velocity, and aqueductal area in patients at all assessment timesa

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)<.05b
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.