A nitrous oxide and oxygen supply, vacuum source, {HEAD ~ a breather bag}, and a nasal delivery interface system are fluidly connected to the fluid control system and {TAIL ~ a patient} 
fluidly connected to
A nitrous oxide and oxygen supply , vacuum source , { HEAD ~ a breather bag } , and a nasal delivery interface system are fluidly connected to the fluid control system and { TAIL ~ a patient }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL