We assessed the approachability of the upper calyx through lower calyx access for prone and supine percutaneous nephrolithotomy and used computerized tomography to analyze anatomical factors that may influence it. A prospective series of 45 patients treated with percutaneous nephrolithotomy were operated on in the prone (20) and supine (25) positions. Computerized tomography simulated access to the lower and upper calyx longitudinal axes were used to measure skin-to-lower calyx distance, thickness of the body wall, muscle and fat, the muscle-to-fat thickness ratio and the angle between the lower calyx tract and the upper calyx axis. Intraoperative approachability to the upper calyx was also evaluated. The upper calyx was successfully approached in 20% of prone and 80% of supine percutaneous nephrolithotomies (p <0.0001). The average skin-to-lower calyx distance was 98.4 mm (range 65.3 to 128.6) in the prone position and 98.7 mm (range 60.8 to 150) in the supine position (p = 0.99). Body wall and muscular thickness, and the muscle-to-fat thickness ratio were significantly lower in supine than prone nephrolithotomy (p <0.001, <0.0005 and <0.05, respectively). The average angle between the lower and upper calyces axes was wide in the supine position (141 degrees, range 90 to 170) and acute in the prone position (84 degrees, range 65 to 110, p <0.05(E-10)). Upper calyx endoscopic approachability through the lower calyx is significantly higher in supine than in prone percutaneous nephrolithotomies, possibly due to a thinner body wall, a thinner muscular layer, a lower muscle-to-fat thickness ratio and a wider angle between the lower and upper calyx axes.

Purpose: To assess the long-term outcome of early endoscopic realignment (EER) of complete posterior urethral disruption. Patients and Methods: The study included 11 consecutive patients with complete posterior urethral disruption secondary to a road accident (n = 9) or a falling impact (n = 2). EER was performed using a simultaneous endoscopic transvesical and transurethral approach under fluoroscopic guidance. An 18F Foley urethral catheter was left for 4 weeks. All patients were evaluated postoperatively for incontinence, erectile dysfunction, and urethral strictures. Results: The patients' mean age was 32 years (range 20–62 y). The mean duration of the realignment procedure was 40 minutes (range 30–60 min), and it was performed within an average of 48 hours (range 3–72 h) from hospitalization. Efficient erection was maintained in five (45%) patients, and incontinence did not develop in any patient. Five (45%) patients in whom urethral strictures developed were treated initially by endoscopic urethrotomy (EU), which was successful in one patient. Three of the four in the EU failure group remained on periodic urethral dilation, refusing to undergo urethroplasty, and one patient with interposition of a pubic bone fragment underwent successful urethroplasty. There were no other complications during a mean follow-up of 4.3 years (range 2–7 y). Conclusions: EER is a valuable alternative to long-term suprapubic drainage and delayed urethroplasty. Realignment failure did not interfere with the results of open urethroplasty. A further search for prognostic factors should improve the selection of patients for the early or the delayed approach.