| Byon HJ 2013 [20] | children | 33 | Operation room | Vivid 7, Pro, GE | Echocardiography | Mechanical ventilation (PEEP = 0 cm H2O) | (IVCmax − IVCmin)/[(IVCmax + IVCmin)/2] | SVI > 10% | 10 ml/kg hydroxyethlstarch |
| Baker et al. 2013 [21] | adults | 25 | ICU | Philips | Echocardiography | Mechanical ventilation (TV 6 - 8 mL/kg; PEEP 5 - 8 cmH2O | (IVCmax − IVCmin)/IVCmin | SV > 15% | 500 ml colloid |
| Lanspa et al. 2013 [22] | adults | 14 | ICU | Philips | Echocardiography | Spontaneously breathing | (IVCmax − IVCmin)/IVCmax | CI > 15% | 10 ml/kg crystalloid |
| Charbonneau et al. 2014 [23] | adults | 44 | ICU | Philips | Echocardiography | Mechanical ventilation (TV = 6.4 - 11.0 mL/kg; PEEP = 5- 12 cm H2O) | (IVCmax − IVCmin)/IVCmin | CI > 15% | 7 ml/kg 6% hydroxyethlstarch |
| de Valk et al. 2014 [24] | adults | 45 | ED | Zonare, Mountain View | Systolic blood pressure | Spontaneously breathing | (IVCmax − IVCmin)/IVCmax | SBP > 10 mmHg | 500ml 0.9% NaCl |
| Sobczyk et al. 2015 [25] | adults | 50 | ICU | Philips | Echocardiography | Mechanical ventilation (TV = 8 mL/kg; PEEP = 4.5 cm H2O | (IVCmax − IVCmin)/IVCmin; (IVCmax − IVCmin)/IVCmax | CO > 15% | 2625 ± 778 mL within the first 6 hours |
| Lujan,varas et al. 2015 [26] | adults | 15 | ICU | Not mention | Picco, Vigileo, Swan-Ganz | Mechanical ventilation (PEEP11.4 ± 3.74) | (IVCmax − IVCmin)/IVCmin | CO > 15% | passive leg raise |
| Airapetian et al. 2015 [27] | adults | 59 | ICU | Philips | Echocardiography | Spontaneously breathing | (IVCmax − IVCmin)/IVCmax | CO > 10% | 500 ml saline |
| Weber et al. 2015 [28] | children | 31 | PICU | Vivid S6; GE | Echocardiography | Mechanical ventilation (TV = 7.9 ± 3.8 mL/kg; PEEP = 6.8 ± 1.8 cm H2O) | (IVCmax − IVCmin)/IVCmin | SVI > 10% | 10 ml/kg 6% hydroxyethlstarch |