A nurse is assisting in the care of a client who is in active labour. The nurse notes variable decelerations of the FHR. The nurse should identify which of the following is a cause of variable decelerations.

The correct answer is choice d. Vastus lateralis.

Choice A rationale:

The deltoid muscle is not typically used for newborn injections because it is too small and underdeveloped, making it an inappropriate site for intramuscular injections in this age group.

Choice B rationale:

The dorsogluteal muscle is also not recommended for newborns due to the risk of injury to the sciatic nerve and the muscle’s underdevelopment.

Choice C rationale:

The ventrogluteal muscle, while a good site for older children and adults, is not commonly used for newborns because it is not as easily accessible and developed as the vastus lateralis.

Choice D rationale:

The vastus lateralis muscle, located on the anterolateral aspect of the thigh, is the preferred site for intramuscular injections in newborns. It is well-developed and provides a large muscle mass, making it the safest and most effective site for administering vitamin K.

Choice A rationale :

Vitamin K decreases the newborn's risk of jaundice. Rationale: This statement is incorrect. Vitamin K plays no direct role in reducing the risk of jaundice in newborns. Jaundice is primarily caused by the accumulation of bilirubin in the blood, which is a different issue than hemorrhagic disorders.

Choice B rationale

Vitamin K decreases the newborn's risk of healthcare-associated infections. Rationale: This statement is incorrect. Vitamin K is not related to reducing the risk of healthcare-associated infections. Its main function is related to blood clotting and preventing hemorrhagic disorders.

Choice C rationale

Vitamin K decreases the newborn's risk of hemorrhagic disorders. Rationale: This statement is correct. Vitamin K is essential for the production of clotting factors in the blood, which helps prevent bleeding or hemorrhagic disorders in newborns. Newborns are born with low levels of vitamin K, so administering a vitamin K injection at birth is a common practice to prevent potential bleeding issues.

Choice D rationale

Vitamin K decreases the newborn's risk of complications from the Hepatitis B vaccine. Rationale: This statement is incorrect. Vitamin K is not directly related to reducing the risk of complications from the Hepatitis B vaccine. The vaccine is designed to protect against Hepatitis B infection, and vitamin K is not involved in its efficacy or safety.