OBJECTIVE:

To determine the success rate and complications related to percutaneous nephrolithotomy.

MATERIALS AND METHODS:

An analytic, cross-sectional study was conducted on patients that underwent percutaneous nephrolithotomy at the Hospital Regional Dr. Valentín Gómez Farías, within the time frame of March 2014 to October 2017. The variables analyzed were: age, sex, affected kidney, history of kidney surgery or extracorporeal lithotripsy, associated comorbidities, kidney stone characteristics, location and microbiology, stone-free rate, and complications. The data analysis was carried out using the SPSS version 10 statistics program. The Fisher’s exact test was employed and statistical significance was set at a p<0.05.

RESULTS:

A total of 191 patients were included, 41.8% of whom were men and 58.1% women. The mean age was 56.9 ± 12.1 years. The right kidney was the most affected (52%). Thirty-six percent of the patients had a history of kidney surgery and 22% had undergone shock wave lithotripsy. Likewise, 36% presented with a comorbidity. Mean stone diameter was 2.52 cm and mean volume was 2.98 cc. The most frequent location was the lower calyx, followed by the renal pelvis. Twenty-nine percent of the cultures were positive. The most frequent microorganisms were Escherichia coli, Proteus mirabilis, Klebsiella pneumoniae, and Pseudomonas aeruginosa. The stone-free rate was 78% and the complication rate was 18%.

CONCLUSIONS:

Percutaneous nephrolithotomy is an effective technique in the treatment of kidney stones, reducing the complication rate.

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