Table 1.
Classifications of PCNL
| PCNL classification according to different investigating groups | |
|---|---|
| Procedure | Sheath outer diameter |
| Standard PCNL (2) | >22 Fr |
| Mini-PCNL (3) | ≤22 Fr |
| MIP (4) | 18 Fr |
| UMP (5) | 13 Fr |
| SMP (6) | 10–14 Fr |
| Superperc (11) | 10–12 Fr |
| Micro-PCNL (7) | <5 Fr |
| Mini-micro PCNL (13) | 8 Fr |
| PCNL classification proposed by Schilling et al.[8] | |
| Size | Sheath outer diameter |
| XL | ≥25 Fr |
| L | 20–24 Fr |
| M | 15–19 Fr |
| S | 10–14 Fr |
| XS | 5–9 Fr |
| XXS | <5 Fr |
| PCNL categorization proposed by Tepeler et al.[9] | |
| Size of percutaneous access indicated as superscript: e.g., PCNL+30, PCNL+20, and PCNL+12 | |
PCNL: percutaneous nephrolithotomy; MIP: minimally invasive PCNL; UMP: ultra-mini PCNL; SMP: super-mini-PCNL