A 36-week pregnant woman is having a seizure. After ensuring ventilation, in which position should she be transported?

Transporting a pregnant woman who is having a seizure in the left lateral position, or on her left side, is the correct choice. This position is beneficial because it helps to prevent potential complications associated with the weight of the uterus compressing major blood vessels, particularly the inferior vena cava, which can lead to reduced blood flow back to the heart and, consequently, reduced cardiac output. Positioning the woman on her left side allows for optimal blood circulation to both the mother and the fetus.

Additionally, this lateral position can help protect the airway, as it reduces the risk of aspiration in case of secretions or vomiting during or after the seizure. It also provides some comfort and promotes fetal well-being by minimizing pressure on the placenta.

The prone position is not suitable for a pregnant woman, as lying face down can create additional pressure on the abdomen and restrict respiratory function. The supine position could exacerbate issues with impaired blood circulation and further compromise cardiac output. Though a semi-sitting position might seem somewhat safer, it does not provide the same level of protection against vena cava compression as the left lateral position does. Thus, transporting her on her left side is the best practice in this scenario.