Table 3.
Intrarenal pressures characteristics and fluctuations
| 3a. IRP characteristics and profile | ||
|---|---|---|
| Mean basic IRP (± SD), cmH2O | 13.19 (± 5.99) | |
| Mean of the mean IRPs during the operations (± SD), cmH2O | 15.38 (± 6.24) | |
| N. of cases with peaks of IRP > 40.78 cmH2O (30 mmHg), n. (%) | 19 (86) | |
| N. of cases with mean IRP > 27.19 cmH2O (20 mmHg), n. (%) | 0 (0) | |
| Median accumulative time with IRP > 40.78 cmH2O (30 mmHg) (IQR), s | 28.52 (12.5 – 60.04) | |
| N. of cases with accumulative time (with IRP > 40.78 cmH2O) > 50 s, n. (%) | 7 (31.8) | |
| N. of cases with accumulative time (with IRP > 40.78 cmH2O) > 60 s, n. (%) | 5 (22.7) | |
| N. of cases with accumulative time (with IRP > 40.78 cmH2O) > 70 s, n. (%) | 3 (13.6) | |
| 3b. Intrarenal pressure measurements step by step | ||
|---|---|---|
| Surgical steps | Overall meana IRP (± SD), cmH2O |
Overall maxb IRP (cmH2O) |
| Initial retrograde pyelography | 36.14 (± 16.75) | 65 |
| Renal puncture | 32.46 (± 12.49) | 53,8 |
| Percutaneous pyelography through puncture needle | 37.26 (± 20.65) | 102 |
| Percutaneous tract dilation | 39.10 (± 18.19) | 74 |
| Initial nephroscopy with closed aspiration, max IRP | 39.03 (± 24.09) | 94 |
| Lithotripsy and simultaneous vacuum-lapaxy, mean IRP | 13.29 (± 6.55) | 26.53 |
| Lithotripsy and simultaneous vacuum-lapaxy, max IRP | 28.37 (± 12.26) | 58 |
| Final nephroscopy with closed aspiration, max IRP | 51.15 (± 11.77) | 70 |
| Percutaneous pyelography through access sheath | 53.44 (± 26.77) | 115 |
| Flexible nephroscopy after lithotripsy, max IRP | 19.88 (± 8.00) | 31 |
| Nephrostomy placement | 25.02 (± 15.37) | 64 |
| Final pyelography through nephrostomy tube | 32.07 (± 21.24) | 89 |
aIntended as the mean of the values of the single procedures for the specific surgical step
bIntended as the maximum value reached among the different procedures for the specific surgical step