Which parental position should be avoided during fetal scalp blood sampling?

During fetal scalp blood sampling, the lithotomy position should be avoided due to the potential risks associated with this position during labor and delivery. The lithotomy position involves the mother lying on her back with her legs elevated and separated, which can exert pressure on major blood vessels. This can lead to reduced blood flow and oxygen delivery to the fetus, possibly compromising fetal well-being. Additionally, this position can make it more challenging for healthcare providers to access the fetus during the procedure.

In contrast, other positions such as the supine, latent, or sitting upright positions may be more favorable as they can help facilitate easier access while allowing for better maternal circulatory dynamics. Supine positioning can enhance venous return, though it should be monitored due to the risk of supine hypotensive syndrome. Meanwhile, the sitting upright or slightly lateral positions can promote fetal oxygenation and improve the overall comfort of the mother.