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