Needle 14 remains in void space 15 until {HEAD ~ the sensor} 12 is removed from {TAIL ~ the patient} and it and base unit 18 are disposed 
is removed from
Needle 14 remains in void space 15 until { HEAD ~ the sensor } 12 is removed from { TAIL ~ the patient } and it and base unit 18 are disposed
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH