Upon {HEAD ~ receipt} of {TAIL ~ the alarm signal}, the alarm means issues an audible stimulus or a vibratory stimulus having sufficient intensity to awaken the patient as a reminder to the patient to adjust the mask 
Upon { HEAD ~ receipt } of { TAIL ~ the alarm signal } , the alarm means issues an audible stimulus or a vibratory stimulus having sufficient intensity to awaken the patient as a reminder to the patient to adjust the mask
OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH