Fig. 1From: Rectal, central venous, gastric and bladder pressures versus esophageal pressure for the measurement of cough strength: a prospective clinical comparisonWaveforms at all five measurement sites. Congruent waveforms recorded for four patients at all five measurement sites. Pcv = central venous pressure; PES = esophageal pressure; Pga = gastric pressure; PBL = bladder pressure; Prec = rectal pressureBack to article page