Patent ID: 8403974

Claim:
A medical warming system comprising: a plurality of heating elements respectively adapted to be disposed close to various parts of a patient's body, each heating element comprising a multi-layer conductive coating of about 50 nm to about 70 nm each layer in thickness; a first group of sensors disposed at the proximity of the heating elements and configured for measuring the temperatures of the heating elements; a second group of sensors adapted to be disposed at the various parts of the patient's body and configured for measuring the temperatures of the various parts of the patient's body; a power control board connected with the heating elements and configured for controlling the electric power driving the heating elements; and a controller being connected with the power control board and in communication with the first group and the second group of sensors, the controller being configured for receiving temperature data from the sensors and controlling the power control board to adjust the electric power driving the heating elements accordingly; wherein each sensor in the first group and the second groups of sensors comprises a working sensor and a reference sensor, and the controller is configured to compare the readings from the working sensor and the reference sensor and thereby to determine whether the sensor is working properly; the conductive coating is deposited using spray pyrolysis; and the conductive coating includes tin, tungsten, titanium and vanadium.