Occurrence of postpartum haemorrhage is greater in patients
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According to the latest ACOG guidelines, postpartum hemorrhage is defined as cumulative blood loss equal to 1000 ml or more along with signs and symptoms of hypovolemia within 24 hours after delivery regardless of route of delivery. Arterial blood gas analysis is an essential part of diagnosing and managing the oxygenation status and acid-base balance of high-risk patients. The occurrence of postpartum hemorrhage is more in patients with abnormal arterial blood gas. Abnormal pH, abnormal base deficit, and abnormal pCO2 are the determinant parameters of arterial blood gas that can predict the occurrence of postpartum hemorrhage. Associated risk factors i.e. severe anemia, pregnancy-induced hypertension, multiple pregnancies, and sepsis with abnormal arterial blood gas parameters further increases the risk of occurrence and severity of postpartum hemorrhage.

This study intends to have a detailed assessment of arterial blood gas and acid-base imbalance in high-risk antenatal patients who may land up into postpartum hemorrhage. The prospective study was conducted at the Department of Obstetrics and Gynaecology, GSVM Medical College, Kanpur. A total of 100 patients were included in the study after satisfying the inclusion and exclusion criteria. In the study, arterial blood gas analysis was performed for all recruited subjects. Out of 100 patients, a total of 14 patients landed up into postpartum hemorrhage. Out of these 14, 10 with abnormal arterial blood gas developed postpartum hemorrhage.