AMSA Basic Nursing 103 Practice Test 2026 – Complete Exam Prep

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Why should the catheter drainage bag be kept below the level of the bladder?

To prevent backflow of urine into the bladder, reducing infection risk

Keeping the drainage bag below the bladder uses gravity to move urine away from the bladder and maintains a closed drainage system. This positioning prevents backflow of urine into the bladder, which reduces the risk of bacteria traveling up the catheter and causing a urinary tract infection. It’s not about increasing drainage pressure or improving comfort or facilitating removal; the key purpose is preventing reflux to protect the bladder from infection. Ensure the bag stays lower than the bladder and that tubing isn’t kinked or pulled.

To increase urine drainage pressure

To improve patient comfort only

To facilitate catheter removal