Patent ID: 9572951
Date: 2017-02-21
CPC Classifications: A61M

Claim:
1. An apparatus for the supply of humidified gases to a patient, the apparatus comprising: a humidified gases supply, a gases supply passage downstream of the humidified gases supply and upstream of a user interface, the gases supply passage comprising a wall having an outside, and an inner surface first and second temperature sensors embedded in or located on the outside of the wall of the gases supply passage, and does not extend through the inner surface of the wall of the gas supply passage a controller receiving outputs from the sensors and adapted to derive from the outputs of the sensors an estimation of humidity of gases flowing through the gases supply passage and to provide a control output to the humidified gases supply according to the outputs of the sensors; wherein at least the inner surface of the wall of the gases supply passage separates the sensors from a flow of gases in the gases supply passage such that the sensors sense temperature of the gases supply through at least the inner surface of the wall of the gases supply passage.