This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
16 F foleys is used in - 
Select and explain. 
A. Acute urinary retention, B. CA penis, C. Pyonephrosis, D. None
A: Acute urinary retention
Answer: A: Acute urinary retention 
Explanation: Ans. is 'a' i.e., Acute urinary retention * "Catheterization is mandatory for acute urinary retention. Spontaneous voiding may return, but a catheter should be left indwelling for 3 days while detrusor tone returns."- CSDT 13/e* 16F and 18F foleys are mainly used for adults* 8F and 10F are mainly used for children* Acute urinary retention is an indication for catheterization