Filtration of blood in the aorta will usually be conducted while the heart is functioning normally, i.e., without {HEAD ~ the use} of {TAIL ~ cardiopulmonary bypass} 
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Filtration of blood in the aorta will usually be conducted while the heart is functioning normally , i.e. , without { HEAD ~ the use } of { TAIL ~ cardiopulmonary bypass }
OTH 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 REL TAIL TAIL TAIL TAIL TAIL TAIL