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Table 1 Evaluation studies on the accuracy of thoracic electrical bioimpedance devices

From: Non-invasive hemodynamic monitoring in trauma patients

Author, year Study design Device Patients Correlation coefficient r r 2 Bias and precision (l/min/m 2 )
Bishop et al. 1996 [15] Prospective Renaissance Technologies 54 patients with gunshot wounds 0.79 0.62 −0.011
Shoemaker et al. 1998 [11] Retrospective Renaissance Technologies 268 (139 trauma patients) 0.83 0.68 −0.058 +/- 0.78
Velmahos et al. 1999 [2] Prospective Renaissance Technologies 38 severely traumatized patients 0.91 0.83 -
Velmahos et al. 1999 [3] Prospective Renaissance Technologies 134 blunt trauma patients 0.83 0.69 −0.02 +/- 0.78
Shoemaker et al. 2001 [6] Prospective IQ System; Wantagh Inc. 151 trauma patients 0.91 0.83 −0.3 +/- 1.1
Brown et al. 2005 [13] Retrospective IQ System; Wantagh Inc. 285 critically injured patients 0.84 0.71 −0.14 +/-0.73
Shoemaker et al. 2006 [5] Prospective IQ Model 101; Noninvasive Medical Technologies LLC or PhysioFlow; VasoCOM 267 trauma patients 0.92 0.84 −0.07 +/- 0.47