The present invention refers to a device (10) for demand oxygen delivery to a patient, which comprises means for delivering an amount of oxygen (30) to the patient, characterised in that the device further comprises:- means for identifying an absence of the patient's inspiration during a pre-established or calculated period of time (206, 220, 222)；- means for delivering a sensorial warning by touch (221, 223) upon identifying such absence； and/or,- means for adjusting the amount of oxygen delivered to the patient according to a patient's respiratory frequency (210-218).The sensorial warning by touch may comprise a train of oxygen pulses with a predefined duration and rate, delivered to the patient's nose via a nasal cannula (30).
