A drop in the cassette sealing bladder pressure can compromise the seal of {HEAD ~ the dialysis pumping cassette} relative to {TAIL ~ the dialysis instrument} 
relative to
A drop in the cassette sealing bladder pressure can compromise the seal of { HEAD ~ the dialysis pumping cassette } relative to { TAIL ~ the dialysis instrument }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL