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Table 2 Collapsibility index of the inferior vena cava (cIVC) in non-responders and responders before volume expansion

From: Measurement site of inferior vena cava diameter affects the accuracy with which fluid responsiveness can be predicted in spontaneously breathing patients: a post hoc analysis of two prospective cohorts

Breathing Measurement Non-responders Responders
Condition Site (n = 40) (n = 41)
cIVC-ns (%) 0 19 (8; 28) 35 (20; 44)
  1 22(10; 34) 41 (24; 53)
  3 11 (3; 18) 36 (20; 67)
  4 12 (5; 24) 45 (25; 58)
  5* 7 (2; 18) 29 (17; 56)
cIVC-st (%) 0 32 (15; 47) 41 (28; 51)
  1 34 (19; 52) 54 (42; 65)
  3 26 (11; 42) 61 (49; 82)
  4 13 (8; 31) 61 (52; 79)
  5* 14 (3; 32) 55 (32; 72)
  1. Values are expressed as counts (%) or medians and interquartile ranges (25th; 75th centiles) Measurements of inferior vena cava (IVC) diameters were carried out at five sites: at the IVC-atrium junction (site 0), then at 1 (site 1), 3 (site 3), 4 (site 4) and 5 cm (site 5) caudal to the IVC-atrium junction. cIVC-ns collapsibility index of the IVC in non-standardized breathing conditions, cIVC-st collapsibility index of IVC with standardized breathing manoeuvre. *Measurement site 5 was performed in only 37 non-responders and 39 responders