When the retractable/deployable bolster is deployed {HEAD ~ the retractable/deployable bolster} protrudes from {TAIL ~ the top surface} and is positioned about a portion of the patients perimeter 
protrudes from
When the retractable / deployable bolster is deployed { HEAD ~ the retractable / deployable bolster } protrudes from { TAIL ~ the top surface } and is positioned about a portion of the patients perimeter
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH