2022年11月29日 · The fraction of inspired oxygen, FiO2, is an estimation of the oxygen content a person inhales and is thus involved in gas exchange at the alveolar level. Understanding oxygen delivery and interpreting FiO2 values are imperative for …

PaO2-FiO2 ratio PaO2/FiO2 is 300 indicates clinically significant exchange derangement used clinically

2019年8月11日 · The P/F ratio is a powerful objective tool to identify acute hypoxemic respiratory failure when supplemental oxygen has already been administered and no room air ABG is available, or pulse oximetry readings are unreliable.

2024年7月6日 · PaO2/FiO2 ratio is the ratio of arterial oxygen partial pressure (PaO2 in mmHg) to fractional inspired oxygen (FiO2 expressed as a fraction, not a percentage) also known as the Horowitz index, the Carrico index, and (most conveniently) the P/F ratio

2016年6月12日 · Your first question when looking at the ABG should be “Is this patient hypoxic?” as hypoxia is the most immediate threat to life. PaO2 should be >10 kPa (75mmHg) when oxygenating on room air in a healthy patient.

2019年2月6日 · FiO2 can also affect an ABG reading. The PaO2 on your ABG should equal FiO2 x 500. If it doesn’t, there’s probably an A-a gradient. The PaO2/FiO2 ratio (or P/F ratio) is useful for categorizing hypoxia as potentially severe (when applied to ARDS). So what about the patient above? His PaO2 of 68 mm Hg correlated perfectly with an O2 sat of 93%.

2025年3月2日 · This article simplifies the process of ABG interpretation, providing a systematic approach to analyzing its components and offering clinical insights into various physiological …

2024年8月11日 · FiO2 is the concentration of oxygen delivered to the patient. FiO2 is expressed as a fraction of 1.0 (eg, 0.21 for room air and 1.0 for 100% oxygen). FiO2 is adjusted to maintain adequate oxygenation. Prolonged exposure to high oxygen levels can cause oxygen toxicity, so the goal is to use the lowest FiO2 that achieves satisfactory oxygenation. [5]

2023年4月27日 · Portable ABG meters often measure pO2 and subsequently estimate the oxygen saturation. Thus, the portable ABG meter may provide an inferior evaluation of systemic oxygen delivery as compared to pulse oximetry (which is directly measuring the oxygen saturation). ABGs occasionally reflect venous samples

此外，如果PaO2 超級高 （其實也很常見）、有使用氧氣設備的病人，可以用 Rule of Seven 來決定 是否需要下調氧氣濃度（FiO2），算法是 (PaO2-100)/7 （除5其實也可以）；舉例來說，如果PaO2是150mmHg， (150-100)/5=10，如果病人氧氣濃度是70%，就可以下調成60%觀察。