Extracorporeal shockwave lithotripsy or percutaneous nephrolithotomy for lower pole nephrolithiasis?

Area of Science:

• Urology
• Nephrology
• Surgical Innovation

Background:

• Lower pole nephrolithiasis presents a therapeutic challenge, with ongoing debate regarding the optimal initial treatment modality.
• Extracorporeal shockwave lithotripsy (SWL) and percutaneous nephrolithotomy (PCNL) are primary surgical options for kidney stones.

Purpose of the Study:

• To compare the clinical effectiveness of SWL and PCNL as the initial therapy for lower pole nephrolithiasis.
• To evaluate stone-free rates, complication rates, repeat treatment needs, and hospital stay duration for both SWL and PCNL.

Main Methods:

• Retrospective review of 968 patients treated with SWL for single lower pole stones.
• Systematic review of published literature comparing SWL and PCNL for lower pole nephrolithiasis.

Main Results:

• SWL demonstrated a 71.2% stone-free rate, 6.4% repeat treatment rate, 0.5% complication rate, and <24-hour hospital stay in 99.3% of cases.
• Published PCNL series reported 70.5%-100% stone-free rates but higher complication rates (13%-38%) and longer hospital stays (3.1-6.1 days).
• Recurrent stone rates were similar between SWL and PCNL (11%-22%).

Conclusions:

• Despite potentially higher stone-free rates with PCNL, SWL is clinically more effective for lower pole calculi <2 cm due to its superior safety profile and patient convenience.
• SWL should be considered the primary therapeutic option for lower pole kidney stones, balancing efficacy with reduced morbidity.