OBSintermediate
Distinguish primary from secondary PPH and explain why the distinction matters clinically.
Answer
Primary PPH occurs within 24 hours after birth; secondary PPH occurs after 24 hours and up to 42 days postpartum. The timing helps direct evaluation toward immediate causes such as atony, retained placenta, or trauma versus later causes such as retained tissue and infection.
Explanation
The defining distinction is the time of onset: primary PPH occurs during the first 24 hours, whereas secondary PPH occurs afterward through the defined postpartum period. This classification helps organize investigation and management because the likely causes differ. **Key takeaway:** Establish when bleeding began before planning cause-directed care.\n\n**Glossary:** **Atony**: failure of the uterus to contract effectively.
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