The primary purpose of urinary catheterization is to

The primary purpose of urinary catheterization is to

• A. Withdraw urine or to insert dye into the bladder
• B. Measure kidney filtration rate
• C. Treat urinary stones
• D. Directly visualize the bladder with imaging

Answer: (A)

Placing a urinary catheter is mainly about draining urine from the bladder. This allows continuous urine output monitoring, obtaining sterile urine samples, and relieving urinary retention. It can also be used to instill substances into the bladder, such as contrast dye for imaging studies, which is why measuring drainage or enabling dye instillation covers the typical primary uses. The other options don’t reflect this core purpose. Directly measuring kidney filtration rate isn’t done via catheterization (it relies on timed urine collections and blood tests to estimate or measure filtration). Treating urinary stones isn’t accomplished by catheterization itself, and while imaging can involve bladder contrast, catheter placement alone isn’t a stand-alone imaging modality.

Placing a urinary catheter is mainly about draining urine from the bladder. This allows continuous urine output monitoring, obtaining sterile urine samples, and relieving urinary retention. It can also be used to instill substances into the bladder, such as contrast dye for imaging studies, which is why measuring drainage or enabling dye instillation covers the typical primary uses.

The other options don’t reflect this core purpose. Directly measuring kidney filtration rate isn’t done via catheterization (it relies on timed urine collections and blood tests to estimate or measure filtration). Treating urinary stones isn’t accomplished by catheterization itself, and while imaging can involve bladder contrast, catheter placement alone isn’t a stand-alone imaging modality.