Needle nephroscope combined with ureteroscope via a single standard percutaneous nephrolithotomy channel for the treatment of complex non-obstructing renal stones

For complex non-hydronephrotic renal stones, a CT value ≥ 1,000 should be treated with single standard PCNL using a puncture-assisted method; a CT value < 1,000 is better treated with a combination of puncture-assisted single standard PCNL and ureteroscopic laser lithotripsy, with higher safety and efficacy.