In which position should a pregnant woman with back pain be placed on a backboard before transport in a toboggan?

When transporting a pregnant woman with back pain on a backboard in a toboggan, placing her on her left side is the most appropriate option. This positioning is recommended primarily for the well-being of both the mother and the fetus.

The left side is ideal because it maximizes blood flow to the fetus by reducing pressure on the inferior vena cava, a major vein that carries blood back to the heart from the lower body. When a pregnant woman lays on her back, particularly in the later stages of pregnancy, the weight of the uterus can compress this vein, potentially leading to decreased circulation, which may cause nausea, lightheadedness, or complications for the fetus.

Additionally, laying on the left side can help alleviate back pain and provide comfort during transport. While the right side is similarly beneficial for reducing pressure on certain organs, the left side is the preferred position to ensure optimal blood circulation and oxygen delivery to the fetus.

In contrast, placing the woman on her back or in a sitting position would not provide the same benefits and could introduce risks associated with compressing major blood vessels, potentially jeopardizing both her and the fetus's health.