What is an indwelling catheter?

An indwelling catheter is specifically defined as a hollow tube designed to be inserted into the bladder for the purpose of draining urine. What distinguishes an indwelling catheter is the presence of a small balloon at the tip of the catheter that can be inflated once the catheter is in place. This balloon holds the catheter securely within the bladder, preventing it from slipping out and allowing for continuous drainage.

Understanding the structure and purpose of the indwelling catheter is critical in nursing practice, as it aids in managing patients with urinary retention, collecting urine samples for testing, or monitoring urinary output in various clinical settings. The function of the balloon is essential to its role; without it, the catheter would not stay in place and would not fulfill its intended use effectively.

The other options do not accurately describe the indwelling catheter. A tube for measuring blood pressure is unrelated to urinary function, a device for intravenous medication serves a completely different purpose, and tools for physical therapy focus on movement and strengthening rather than urinary management. Thus, option B correctly identifies the defining characteristics of an indwelling catheter.