The nurse is preparing to administer IV fluids at 175 mL/hr to a dehydrated client. Which device is best for accurate delivery?

• A. Gravity drip
• B. Manual syringe pump
• C. Volumetric pump
• D. Cassette infusion pump

Answer: (D)

Accurate IV infusion relies on a device that actively controls flow rather than depending on gravity or manual manipulation. A cassette infusion pump delivers a precise, repeatable rate through a disposable peristaltic cassette that defines the fluid path; the pump advances tubing to push a set volume each cycle, and it includes safety features like occlusion and air-in-line alarms. This combination minimizes human error and ensures the rate of 175 mL/hr is maintained consistently, which is crucial for safe hydration. Gravity drip can be affected by height, tubing size, and patient position, leading to variable flow. A manual syringe pump can be precise but is impractical for continuous IV fluid administration at a steady rate. While volumetric pumps are also accurate, the cassette infusion pump’s disposable cassette and integrated safety mechanisms make it the best choice for reliable, controlled delivery.