Also, to conserve the number of solenoid valves needed, {HEAD ~ the system} in one embodiment places a check valve in a split in a line that supplies pressure to {TAIL ~ the cassette sealing bladder} and occluder bladders, such that the occluder bladder cannot steal positive pressure from the cassette sealing bladder 
Also , to conserve the number of solenoid valves needed , { HEAD ~ the system } in one embodiment places a check valve in a split in a line that supplies pressure to { TAIL ~ the cassette sealing bladder } and occluder bladders , such that the occluder bladder can not steal positive pressure from the cassette sealing bladder
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH