Catheter
A tube inserted into the bladder to drain urine.
An indwelling urinary catheter drains the bladder continuously but is a leading cause of healthcare-associated infection, so it should be removed as soon as it is no longer clinically needed. Maintain a sterile, closed drainage system, keep the bag below bladder level to prevent backflow, and secure the tubing to avoid traction. Provide routine perineal care and never raise the bag above the bladder during transfers.
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