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Table 2 Studies that relate pulmonary haemodynamic variables to outcome from ARDS

From: Pulmonary vascular dysfunction in ARDS

  Study period Number PAP mmHg (mean PAP unless specified) PVRI wood units (m−2) PAOP mmHg Independent predictors of survival
PAP PVR (I)
Zapol and Snider [9] Pre 1977 30 28 to 32 (2.5 to 4.8) n/a N Y (trend)
Villar et al. [10] 1983 to 1986 30 27 to 28 ± 4 to 7 4.5 ± 1.69 to 5.7 ± 2.06 10 ± 4 to 11 ± 5 N Y
Squara et al. [6] 1985 to 1987 586 26 ± 8.5 3.21 ± 1.75 11.7 ± 4.5 Y N
Suchyta et al. [11] 1987 to 1990 162 26 ± 8 n/a n/a N -
Hemmila et al. [12] 1989 to 2003 255 Systolic 46 ± 13.5 n/a 17.6 ± 5 N -
Diastolic 28.5 ± 8.9
Osman et al. [13] 1999 to 2001 145 28 ± 8 4.5 ± 2.4 12 ± 5 Y N
Cepkova et al. [8] 2004 to 2006 42 Systolic 42 ± 9    N  
Echo derived
Beiderlinden et al. [14] Pub 2006 95 35.4 ± 8.8 4.625 ± 2.04 16 ± 5.4 N -
Bull et al. [5] 2000 to 2005 501 31.6 ± 8.3 3.825 (2.49 to 6.48) 17.13 ± 5 N Y
  1. All haemodynamic data was derived from pulmonary artery catheter use unless otherwise stated. mPAP, mean pulmonary artery pressure; PVRI, pulmonary vascular resistance index; PAOP, pulmonary artery occlusion pressure; PAP, pulmonary artery pressure. Wood units (mmHg/L/min) are multiplied by 80 to convert to standard metric units (dynes.sec.cm−5). Normal values for PVR range from 0.3 to 1.6 Wood unit.