Ultrasonography has a high ability to access calculi more easily through the pyelocaliceal system with the patient in the flank position. It is convenient for urologists, and the return to the supine position is possible easily when necessary. Besides, PCNL under ultrasonography guidance and with the patient in the flank position has high success rates and limited complications; hence, we recommend this technique as an alternative procedure for fluoroscopy-guided PCNL.

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