Final answer:
There are four categories of postpartum hemorrhage: tone, tissue, trauma, and thrombin.
Step-by-step explanation:
The question is asking about the categories of postpartum hemorrhage. Postpartum hemorrhage is defined as excessive bleeding following childbirth. There are four categories of postpartum hemorrhage:
- Tone: Refers to the lack of uterine muscle tone, also known as uterine atony.
- Tissue: Refers to the presence of retained placenta and blood clots in the uterus.
- Trauma: Refers to any vaginal, cervical, or uterine injury that may cause bleeding.
- Thrombin: Refers to coagulopathy, which can be a preexisting or acquired condition where the blood is unable to clot properly.