What feature of an infusion device ensures it functions during a power interruption?

The feature of an infusion device that ensures it continues to function during a power interruption is the battery backup. When there is a loss of power, the battery backup activates and provides the necessary power to keep the device operational, allowing for the uninterrupted delivery of medication or fluids to the patient. This is critical in clinical settings where consistent therapy is essential for patient safety and treatment efficacy.

Other features, such as a hydrophobic filter, pressure relief valve, or connection tubing, do not serve this purpose. A hydrophobic filter is designed to prevent moisture and air from entering the fluid path, thereby maintaining the sterility of the infusion. The pressure relief valve helps prevent excessive pressure build-up, ensuring safety in the system. Connection tubing facilitates the delivery of the fluids from the device to the patient but does not provide any power functionality. Thus, the battery backup is the key feature for maintaining operation during power outages.