Treament of upper urinary tract calculus with mini-percutaneous nephrolithotomy throught B althasonic

[Objective] To assess the efficacy of minimally invasive percutaneous nephrolithotomy (mPCNL) in treating upper urinary tract calculus. [Methods] Retrospective analysis 31 cases of upper urinary tract calculus treated by mpcnl. [Resuts] 29 cases achieved by one-stage mPCNL, achievement ratio was 95.49%. The stone of 22 cases were dislodged completely, the rate was 70.96%. There were 28 cases were achieved by one-stage mpcnl, 3 cases by second-stage. The average operative time was 140 min. Blood loss was 20~350 mL, average 90 mL, 2 cases needed blood transfusion during operation. Average nephrostomy tube remaining time was 5~7 days, average double J tube remaining time was 4 weeks. [Clusions] mPCNL is the best minimally invasive way to cure upper urinary tract calculus and worth generalizing, on account of the advantages, such as minimally invasive , less blood loss, high stone dislodged rate and less complication.