Intra-and inter-observer variability of point of care ultrasound measurements to evaluate hemodynamic parameters in healthy volunteers

The Ultrasound Journal

Table 2 Intra-researcher variability for each POCUS parameter

Parameter	Intra-observer variability based on mean CV in %
Parameter	Observer 1 (N = 540)	Observer 2 (N = 469)	Observer 3 (N = 493)	Mean (N = 1502)
Measured
LVOT-D	2.54	2.96	2.18	2.56
LVOT-VTI	5.66	6.22	7.34	6.41
EPSS	23.07	19.74	34.25	25.69
MAPSE	6.25	10.46	9.97	8.89
TAPSE	4.86	8.26	6.18	6.43
IVC-D	4.45	4.22	4.82	4.50
rCBF-D	4.91	7.81	4.82	5.85
rCBF-VTI	10.09	10.72	10.89	10.57
Calculated
CO	5.48	6.24	7.26	6.33
SV	5.50	6.01	7.68	6.39
IVC-CI	12.25	19.63	18.46	16.78
rCBF	11.63	18.91	14.03	14.86

CV coefficient of variation, LVOT-D left ventricular outflow tract diameter, LVOT VTI left ventricular outflow tract velocity time integral, EPSS E point septal separation, MAPSE mitral annular plane systolic excursion, TAPSE tricuspid annulus plane systolic excursion, IVC-D inferior vena cava diameter, rCBF-D right Carotid blood flow diameter, rCBF-VTI right Carotid blood flow velocity–time integral, CO Cardiac output, SV stroke volume, IVC-CI inferior vena cava collapsibility index, rCBF right Carotid blood flow