What is the Guys Stone Score for PCNL?

Guys Stone Score: Grade I (single lower pole stone 10mm or complex anatomy). Grade IV (staghorn). Grade IV has >60% complication rate.

When is staged PCNL preferred over single session?

Staged PCNL: prolonged anesthesia risk, significant residual stone requiring second access, complex staghorn, renal anomaly with multiple access required, or post-PCNL sepsis requiring interval treatment.

What is tubeless PCNL?

Tubeless PCNL omits the nephrostomy tube post-procedure when hemostasis is adequate and no collecting system injury. It reduces pain, hospital stay, and narcotic use with equivalent stone-free rates in selected patients.

PCNL Staged vs Single Session Decision

Determine PCNL approach: single vs staged session based on stone burden, residual stone, patient factors, and Guys Stone Score.

Use the full interactive calculator below, or

Related Calculators

URS Stone Burden Outcome

Hyper-niche Medical

24h Urine Stone Risk