Method for evaluating drip-rate accuracy of intravenous flow-regulating devices

Area of Science:

• Medical Devices
• Fluid Dynamics
• Patient Care

Background:

• Intravenous (IV) therapy is critical for medication delivery.
• Accuracy of IV flow-regulating devices is essential for patient safety.
• Patient positioning and movement can potentially affect IV drip rates.

Purpose of the Study:

• To investigate the impact of patient movement and position changes on the drip-rate accuracy of various IV flow-regulating devices.
• To compare the accuracy of different IV devices under dynamic conditions.

Main Methods:

• Twenty healthy adult volunteers participated in the study.
• IV infusion sites were established, and 5% dextrose was administered using standard IV tubing and bags.
• Drip rates were measured at 40 drops/min for five devices (IVAC 280, roller clamp, Dial-A-Flo, Exacdrop, 3M IV Flow Regulator) across supine, sitting, and standing positions, and during walking.

Main Results:

• The IVAC 280 and 3M IV Flow Regulator maintained consistent drip rates across position changes.
• The roller clamp, Dial-A-Flo, and Exacdrop showed significant decreases in drip rate accuracy when changing from supine to sitting and sitting to standing.
• While walking had minimal impact, returning to a supine position significantly increased drip rates for the roller clamp, Dial-A-Flo, and Exacdrop.

Conclusions:

• The drip-rate accuracy of the roller clamp, Dial-A-Flo, and Exacdrop devices is significantly affected by patient position changes.
• The IVAC 280 and 3M IV Flow Regulator demonstrate superior stability in drip rate accuracy during patient movement.
• Clinical settings should consider the limitations of certain IV flow regulators when patient mobility is a factor.