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In vivo accuracy of gravity-flow i.v. infusion systems
American Journal of Hospital Pharmacy
|February 1, 1985
Summary
Gravity-flow intravenous (IV) infusion systems show significant inaccuracies in fluid delivery for hospitalized patients. This highlights the need for improved monitoring or advanced electronic infusion devices to ensure accurate patient fluid therapy.
Area of Science:
- Medical Devices
- Nursing Practice
- Patient Safety
Background:
- Accurate intravenous (IV) fluid administration is critical for patient care.
- Gravity-flow infusion systems are widely used but their accuracy is often questioned.
Purpose of the Study:
- To evaluate the accuracy of fluid delivery using gravity-flow IV infusion systems in a hospital setting.
- To identify factors influencing fluid delivery accuracy.
Main Methods:
- A prospective observational study was conducted on medical-surgical wards.
- Data on prescribed flow rate, IV set type, drop rate, and remaining fluid volume were collected over four days.
- Drop rates were measured using a photocell device.
Main Results:
- Less than 15% of observations were within +/- 10% of desired drop rates for most flow rates and set types.
- Only 21% of observations were within +/- 20% of desired drop rates.
- Actual fluid delivered differed from desired volumes, though less than predicted by drop rate variability, indicating nursing adjustments.
Conclusions:
- Gravity-flow IV infusion systems demonstrate significant inaccuracy in fluid delivery.
- Improved monitoring, enhanced IV systems, or the use of electronic infusion control devices are recommended for accurate fluid administration.