الفهرس 
Endourologic Anatomy of the Kidney.Only 14 pages are availabe for public view
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Abstract
Introduction: The prone position has been the most commonly used position for percutaneous nephrolithotomy PCNL. However, this approach has some disadvantages; including patients’ discomfort, circulatory and ventilatory difficulties. Valdivia and associates first described the supine position for percutaneous stone surgery to overcome these drawbacks and simplify the procedure. Our aim from this study was to evaluate and compare the outcome of PCNL in both supine and prone positions.
Patients and Methods: Between August 2008 and August 2010; a total of 100 patients were included in this study. They were randomly divided into two groups: Group A: Included 50 patients who were treated in the standard prone position PCNL. Group B: Included 50 patients who were treated in the supine position PCNL.
Results: The data of our 100 patients included in this study was collected and statistical analysis was carried out using ‘Analyse-it’ statistical software program (Version 2.22). The level of statistical significance was defined as p < 0.05. All pre, intra and post operative parameters were comparable except for the intraoperative time that proved to be statistically significant between both groups- 97 minutes (range: 70-140 minutes) for Group A, and 76 minutes (range: 45-115 minutes) for Group B (p< 0.0001).
Conclusion: Supine PCNL can be used with a satisfactory outcome compared with the standard prone technique. It is an effective and safe procedure especially in high risk and morbidly obese patients and allows simultaneous management of ureteral stones, representing a sound alternative to the conventional prone position.