Warmflo warming system overheats fluids in simulated clinical conditions

Area of Science:

• Medical Devices
• Anesthesiology
• Patient Safety

Background:

• Maintaining normothermia is crucial during surgical procedures.
• Fluid warming systems are used to prevent hypothermia in patients.

Purpose of the Study:

• To assess the performance of the Warmflo fluid warming system.
• To evaluate fluid temperatures at various flow rates under simulated clinical conditions.

Main Methods:

• Prospective laboratory investigation using the Warmflo FW-538 system.
• Crystalloid solution (lactated Ringer's) was warmed to set points of 38°C or 42°C.
• Temperatures were measured at different sites and flow rates (2, 10, 100 mL/min).

Main Results:

• At 2 mL/min and 38°C set point, proximal temperatures were 33.4-34.0°C.
• Other conditions resulted in temperatures above 37.5°C, reaching 43.9°C at 100 mL/min and 42°C set point.
• Warming housing temperatures reached up to 48.0°C.

Conclusions:

• The Warmflo fluid warming system demonstrated potential for overheating fluids.
• Temperatures achieved can significantly exceed normal body temperature.
• Clinical vigilance is advised when using this fluid warmer.