Table 1.
Summary of ED studies
| Author (year) | Study population | Purposes and measured outcome | Related findings |
|---|---|---|---|
| Heffner et al .,(2012) [ 13 ] | 300 patients underwent intubation | To identify factors associated with PIH | -SI ≥0.8 was the most strongly associated factor with 67% sensitivity and 80% specificity |
| Koby et al. , (2015) [ 14 ] | 240 patients underwent intubation | To quantify the relationship between the pre-intubation SI value and PIH and mortality | -SI ≥0.8 indicated a higher risk of PIH but was not associated with a longer duration of intubation or higher in-hospital mortality |
| Kim et al ., (2016) [ 15 ] | 352 patients underwent intubation | To determine the possible risk factors that predict PIH | -SI was 0.68 for non-PIH and 0.79 for PIH cases (P <0.01)- PIH patients had higher in-hospital mortality |
| Corey et al ., (2017) [ 16 ] | 417 patients underwent intubation | To compare the predictive ability of the pre-intubation SI value and the (MSI) for PIH; the areas under the curves of receiver operating characteristic curves were compared between the two groups in terms of the outcomes of PIH and in-hospital mortality | -MSI and SI had a similar predictive ability for PIH; the areas under the curves were 0.646 and 0.650, respectively |
| Heffner et al .,(2013) [ 18 ] | 410 patients who underwent intubation | To study the incidence of and the risk factors associated with post-intubation cardiac arrest in comparison to a control group of patients intubated without arrest | -17 patients with post-intubation cardiac arrest (4.2%)-the pre-intubation SI mean of the arrested group was 0.9; this value was higher than that for a non-arrested group (0.71)(P <0.01) |
| KIM et al ., (2014) [ 22 ] | 2,403 patients underwent intubation | To study the incidence and the risk factors associated with cardiac arrest in comparison to a case-control group of patients intubated without arrest | -47 patients with post-intubation cardiac arrest (1.7%) - SI was 1.1 for the arrested group and 0.9 for the control group (P = 0.03) |
| Vyas et al ., (2015) [ 23 ] | Analyzed 30 patients who underwent cardiac arrest within 10 min of intubation | To identify risk factors of post-intubation cardiac arrests. | -The average shock index value was 0.95 im the arrested group |