Table 3.
Time to catheterization/voiding after general or spinal anesthesia, scanned bladder volumes, and bladder filling rates
| N | Mean | Standard deviation | Minimum | Maximum | |
|---|---|---|---|---|---|
| General anesthesia | |||||
| Spontaneous | |||||
| Time (min) | 580 | 282# | ± 117 | 70 | 808 |
| Scan volume (mL) | 595 | 412 | ± 206 | 0 | 1000 |
| Rate (mL/h) | 569 | 100 | ± 66 | 0 | 388 |
| Catheter | |||||
| Time (min) | 26 | 352#* | ± 157 | 178 | 710 |
| Scan volume (mL) | 31 | 602 | ± 216 | 298 | 1000 |
| Rate (mL/h) | 25 | 137 | ± 84 | 32 | 317 |
| Spinal anesthesia | |||||
| Spontaneous | |||||
| Time (min) | 238 | 273^ | ± 82 | 99 | 712 |
| Scan volume (mL) | 238 | 452 | ± 224 | 49 | 999 |
| Rate (mL/h) | 234 | 107& | ± 63 | 11 | 379 |
| Catheter | |||||
| Time (min) | 44 | 205^* | ± 74 | 99 | 397 |
| Scan volume (mL) | 52 | 626 | ± 179 | 330 | 999 |
| Rate (mL/h) | 43 | 203& | ± 94 | 94 | 469 |
N, with missing data, Time = time to catheterization or voiding, Scan volume = scanned bladder volume before voiding or catheterization, Rate = bladder filling rate from start of anesthesia till voiding or catheterization
#General anesthesia spontaneous (282 min) versus catheterization (352 min), p = 0.032
^Spinal anesthesia spontaneous (273 min) versus catheterization (205 min), p < 0.001
*Spinal anesthesia (205 min) versus general anesthesia (352 min) with catheterization, p < 0.001
&Spinal anesthesia bladder filling rate, catheterization (203 mL/h) versus spontaneous (107 mL/h), p = 0.005