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Correspondence to Author: Dr. Kutumba Chandra Yella, 

Associate professor, Department of Urology, Bharati Vidyapeeth (Deemed to be University).

Abstract:

Objective
To compare the anatomical organ positional changes, renal access tract length and maximum renal access angle in relation to the kidney in supine and prone positions through CT scan images.
Methods
CT Urography was performed in 52 patients with various urological complaints in supine and delayed images in prone position. A comparison in both supine and prone position was done to analyse the organ interposition, pleural interposition, mean access tract length, maximum renal access angle for PCNL.
Results
The difference in the organ interposition was not statistically significant whereas Pleural interposition was more common in the prone position compared to supine position on both the right (9 vs 2, p = 0.03) and left (3 vs 0, p = 0.24). Mean access tract length was shorter in prone position on both the right (69.93mm vs 61.74mm, p 0.001) and left (69.78mm vs 63.57mm, p 0.001) sides. Maximum renal access angle was greater in the supine position on both the right (73.570 vs 69.030, p = 0.4) and left (73.780 vs 64.700, p = 0.025) sides with statistical significance on the left side.
Conclusion
PCNL in prone position has an advantage of having shorter access tract length compared to supine position. PCNL in supine position has an advantage of having a wider access angle compared to prone position. Upper calyx puncture for PCNL in prone position has a high chance of pleural interposition.

Citation:

Dr Shams Abdulkadir Iqbal. Comparison of anatomical changes in computed tomography (CT) scan in supine position and prone position with respect to percutaneous nephrolithotomy (PCNL). Annals of Urology 2024.