R-AapCO2 (mmHg) Median Percentiles 25 Percentiles 75 R-Lactat (mmol/L) Median Percentiles 25 Percentiles 75 R-BE Median Percentiles 25 Percentiles 75 R-PO2 (mmHg) Median Percentiles 25 Percentiles 75 R-pCO2 (mmHg) Median Percentiles 25 Percentiles 75 R-ph Median Percentiles 25 Percentiles 75 R-etCO2 (mmHg) Median Percentiles 25 Percentiles 75 O2 (lt/dk) Median Percentiles 25 Percentiles 75 NaHCO3 Doze (x8,4%NaHCO3=1ml/kg) Median Percentiles 25 Percentiles 75 HCPR (minute) Median Percentiles 25 Percentiles 75Īdrenalin Time (x1mg) Median Percentiles 25 Percentiles 75ĭefibrilation time Median Percentiles 25 Percentiles 75Īmiodaron Doze (mg) Median Percentiles 25 Percentiles 75 A value of P < 0.05 was considered statistically significantĪge (year) Median Percentiles 25 Percentiles 75Ī-etCO2 (mmHg) Median Percentiles 25 Percentiles 75Ī-ph Median Percentiles 25 Percentiles 75Ī-pCO2 (mmHg) Median Percentiles 25 Percentiles 75Ī-pO2 (mmHg) Median Percentiles 25 Percentiles 75Ī-BE Median Percentiles 25 Percentiles 75Ī-Lactat (mmol/L) Median Percentiles 25 Percentiles 75Ī-AapCO2 (mmHg) Median Percentiles 25 Percentiles 75ī-ECPR (minute) Median Percentiles 25 Percentiles 75ī-HCPR (minute) Median Percentiles 25 Percentiles 75 The sensitivity, specificity, and positive and negative likelihood ratios (+LR and –LR) were calculated for cutoff values. The predictive significance of variables were measured with receiver operating characteristic (ROC) curves, namely PO2, PCO2, and AaDCO2 with cardiopulmonary resuscitation (CPR) before the EMS team reached the hospital, by emergency physicians in the hospital, and by adrenaline doses. Univariate and multivariate regression analyses were performed to investigate the relationship between significant parameters and ROSC. Continuous variables were compared using the independent sample t-test or the Mann–Whitney U test, as appropriate. The Saphiro–Wilk test was used to evaluate normality with a significance level of 0.05. Categorical data were compared using the chi-square test. The results were expressed as percentages for categorical variables and as medians (interquartile ranges), mean ± standard deviation, minimum, and maximum for the continuous variables. Statistical analysis of the study was performed with SPSS 20.0 (SPSS Inc, Chicago, IL, USA) and Med Calc for sensitivity, specificity, and positive and negative likelihood ratios. For patients with ROSC, the same procedure was repeated again within 5 min of the patient’s pulse and rhythm control. PCO2, PO2, pH, lactate, and BE levels from the blood samples were measured using the ABL 800 Basic Auto check radiometer, according to the directions provided by the manufacturer. Within 3 to 5 min, the analysis results were available. After the blood reached the laboratory, it was taken to the device to be analyzed quickly. If the system was not available, the sample was delivered by the emergency staff. After the air inside the injector was thoroughly evacuated, the sample was delivered to University Research Hospital Central Laboratories at room temperature with the help of the hospital pneumatic system. No medication was given that could affect blood gas parameters of the patients, such as NaHCO3. Simultaneously, blood was drawn to analyze the femoral artery with the help of a heparinized blood gas injector. EtCO2 values from the patient and control groups were measured after admission to the hospital by capnography without stopping resuscitation.
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