To determine what importance is given to the puncture and assistive technologies in percutaneous nephrolithotomy (PNL) in the current urological literature.

中文翻译：

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经皮肾镜取石术——穿刺

确定当前泌尿外科文献中经皮肾镜取石术 (PNL) 中穿刺和辅助技术的重要性。