OBJECTIVE: To determine anatomical variations between the prone, supine, and supine oblique positions that are likely to affect percutaneous renal access. MATERIAL AND METHODS: Twenty patients underwent computed tomography urograms in the supine and prone positions. Twenty patients underwent supine oblique and prone scans. Mean nephrostomy tract length, maximum access angle, and anterior-posterior renal position were calculated. RESULTS: Mean nephrostomy tract length was shorter in the prone position (82.6 mm right kidney, 85.4 mm left kidney) compared with the supine position (108.3 mm right kidney, P<.001; 103.7 mm left kidney, P<.001). Prone tract length was also shorter than supine oblique tract length (86.1 mm vs 96.5 mm; P=.048). Mean maximum access angle was significantly greater (P=.018 right kidney; P=.007 left kidney) in the prone position (right kidney 99.7°, left kidney 104.0°) compared with the supine position (right kidney 87.7°, left kidney 89.4°). The same was true for the prone compared with the supine oblique position (75.8° vs 58.7°; P=.004). No difference was noted in anterior-posterior renal position between the supine and prone positions (20.3 mm vs 26.7 mm; P=.094) or supine oblique and prone positions (22.8 mm vs 15.6 mm; P=.45). CONCLUSIONS: The prone position is associated with a significantly shorter nephrostomy tract length and more potential access sites, which may improve ease and safety of percutaneous renal access.
OBJECTIVE: To determine anatomical variations between the prone, supine, and supine oblique positions that are likely to affect percutaneous renal access. MATERIAL AND METHODS: Twenty patients underwent computed tomography urograms in the supine and prone positions. Twenty patients underwent supine oblique and prone scans. Mean nephrostomy tract length, maximum access angle, and anterior-posterior renal position were calculated. RESULTS: Mean nephrostomy tract length was shorter in the prone position (82.6 mm right kidney, 85.4 mm left kidney) compared with the supine position (108.3 mm right kidney, P<.001; 103.7 mm left kidney, P<.001). Prone tract length was also shorter than supine oblique tract length (86.1 mm vs 96.5 mm; P=.048). Mean maximum access angle was significantly greater (P=.018 right kidney; P=.007 left kidney) in the prone position (right kidney 99.7°, left kidney 104.0°) compared with the supine position (right kidney 87.7°, left kidney 89.4°). The same was true for the prone compared with the supine oblique position (75.8° vs 58.7°; P=.004). No difference was noted in anterior-posterior renal position between the supine and prone positions (20.3 mm vs 26.7 mm; P=.094) or supine oblique and prone positions (22.8 mm vs 15.6 mm; P=.45). CONCLUSIONS: The prone position is associated with a significantly shorter nephrostomy tract length and more potential access sites, which may improve ease and safety of percutaneous renal access.
Authors: Gyanendra R Sharma; Pankaj N Maheshwari; Anshu G Sharma; Reeta P Maheshwari; Ritwik S Heda; Sakshi P Maheshwari Journal: World J Clin Cases Date: 2015-03-16 Impact factor: 1.337
Authors: Silvia Proietti; Moises Elias Rodríguez-Socarrás; Brian Eisner; Vincent De Coninck; Mario Sofer; Giuseppe Saitta; Maria Rodriguez-Monsalve; Carlo D'Orta; Piera Bellinzoni; Franco Gaboardi; Guido Giusti Journal: Transl Androl Urol Date: 2019-09