KHẢO SÁT SỰ TƯƠNG QUAN GIỮA SpO2 VÀ SaO2 TRÊN BỆNH NHÂN SUY HÔ HẤP CẤP GIẢM OXY MÁU

Abstract

Background: Acute Hypoxemic Respiratory Failure (AHRF) is a common clinical condition in ICUs whose symptoms might be ambiguous but can induce a high mortality rate. Measuring blood oxygen saturation helps detect hypoxia, but it may contain inaccuracies in patients with additional conditions. Objectives: To study the correlation between SpO2 and SaO2 in AHRF patients and factors that affect this correlation coefficient. Materials and methods: The study was conducted on 125 patients at the Can Tho General Hospital ICU who were above 16 years old. SpO2, vital signs (arterial pulse rate, blood pressure and body temperature), arterial blood gas results (SaO2, pH, PaO2) and Hemoglobin level of each patient were collected. The patients were grouped based on the cut-off values of each index, then we would study the correlation between SpO2 and SaO2 of each group using the Pearson correlation coefficient. Results: Overall, there was a medium correlation between SpO2 and SaO2 (r = 0.391, p < 0.0001). There existed medium to strong correlations between these two indexes among groups of AHRF patients with normal arterial pulse (r = 0.473), fast arterial pulse (r = 0.356), normal blood pressure (r = 0.331), hypertension (r = 0.331), normal temperature (r = 0.395), mild anemia (r = 0.795), and acidic blood pH (r = 0.425). However, there was no correlation between SpO2 and SaO2 among groups of patients with fever, severe anemia, hypotension and alkaline blood pH. Conclusion: There exists a correlation between SpO2 and SaO2 among patients with AHRF. However, to patients having the abovementioned conditions which nullify the correlation between SpO2 and SaO2, monitoring oxygen saturation via arterial blood gas is essential.