Microperc’ (Micro PCNL) is a procedure performed using a 16-gauge needle.
One of the major disadvantages of Extracorporeal Shock Wave Lithotripsy (ESWL) is its unpredictable result. While the prominent limitation of Retrograde Intrarenal Surgery (RIRS) is high-cost, a limitation is its invasiveness and associated morbidity.

Reduction in the tract size helps reduce the invasiveness of the procedure and potential complications. In Microperc or Micro PCNL, the procedure is performed through a 4.85-Fr (16 gauge) tract. The underlying hypothesis of the ‘All-seeing needle’ is that if the initial tract is perfect, then the tract-related morbidity can be substantially reduced. The optical needle also helps eliminate any traversing viscera. Yet another advantage of microperc is that it is a single-step renal access procedure, which results in a shorter insertion. It thus provides a novel standard of obtaining renal access.