Pulse Oximetry in Pediatric Intensive Care: Comparison of Measured Saturation and Transcutaneous Oxygen Tension

脈搏式氧和分析儀在兒科重症病嬰之使用及血氧飽和度與經皮式氧分壓之臨床比較

馮子強(Tzi-Chiang Fung) ； 傳筱玲(Hsiao-Lin Fu) ； 朱夢麟(Mong-Ling Chu)

《Acta Paediatrica Sinica》 28卷6期 (1987/12) Pp. 447-456

摘要

This study was designed to evaluate the pulse oximeter in infants, and to compare its performance with tcPO2 monitoring and measured saturation and oxygen tension from arterial blood samples. Study was performed on 62 patients. In 53 patients (344 sets of data), it revealed a good linear correlation between transcutaneous PO2 and arterial PaO2 (r=0.70, y=29.80+0.55x). In 25 patients (110 sets of data), it showed the same good correlation between pulse oximeter reading and in arterial SaO2 measurement (r=0.64, y=43.38+0.50x). In addition, advancing PH had significant effect on difference between pulse oximeter and arterial SaO2. S(a-tc)O2 is negative when pH＜7.3 and is positive when pH＞7.3. It increases when pH increases. Value of tcPO2 was significantly underestimated, especially when pH＞7.4. Concluded from this study, both pulse oximetry and transcutaneous oxygen tension monitor are a reliable and accurate noninvasive device for measured arterial oxygenation in critical neonates, because of their rapid response time and continuous information. But neither of them can provide an estimation of arterial pH or PCO2. However, arterial sampling must be performed to evaluate acid base balance of the high-risk newborn infants, and it is important in guiding oxygen therapy.

並列摘要

This study was designed to evaluate the pulse oximeter in infants, and to compare its performance with tcPO2 monitoring and measured saturation and oxygen tension from arterial blood samples. Study was performed on 62 patients. In 53 patients (344 sets of data), it revealed a good linear correlation between transcutaneous PO2 and arterial PaO2 (r=0.70, y=29.80+0.55x). In 25 patients (110 sets of data), it showed the same good correlation between pulse oximeter reading and in arterial SaO2 measurement (r=0.64, y=43.38+0.50x). In addition, advancing PH had significant effect on difference between pulse oximeter and arterial SaO2. S(a-tc)O2 is negative when pH＜7.3 and is positive when pH＞7.3. It increases when pH increases. Value of tcPO2 was significantly underestimated, especially when pH＞7.4. Concluded from this study, both pulse oximetry and transcutaneous oxygen tension monitor are a reliable and accurate noninvasive device for measured arterial oxygenation in critical neonates, because of their rapid response time and continuous information. But neither of them can provide an estimation of arterial pH or PCO2. However, arterial sampling must be performed to evaluate acid base balance of the high-risk newborn infants, and it is important in guiding oxygen therapy.

並列關鍵字

puls2 oximetry ； transcutaneous oxygen tension ； arterial oxygen saturation