Which of the following is not a contraindication for fetal spiral electrode application?

Fetal spiral electrode application is a method used for internal fetal monitoring, and is generally considered when external methods do not provide sufficient data on the fetal heart rate. Among the options listed, the presence of internal fetal monitoring is not a contraindication for using a fetal spiral electrode. In fact, the application of a fetal spiral electrode is typically performed when internal monitoring is necessary due to factors such as maternal obesity, lack of adequate fetal heart rate tracings with external monitors, or when there is a need for more accurate data about the fetal heart rate.

In contrast, conditions such as maternal fever, the presence of hepatitis B, and maternal skin infection can lead to risks and complications that may contraindicate the use of a spiral electrode. These conditions can introduce risks of infection to both the mother and the fetus, making their consideration critical in the decision-making process for monitoring techniques. Therefore, the use of a fetal spiral electrode would be avoided in these circumstances to maintain safety.

This highlights why the presence of internal fetal monitoring is not a contraindication; it is instead an indication for the potential need for advanced monitoring techniques.