A nurse is preparing to administer vitamin K 1 mg IM to a newborn. Available is vitamin K injection 1 mg/0.5 mL. How many mL should the nurse administer per dose?
Choice A: 0.25 mL
Choice B: 0.5 mL
Choice C: 0.75 mL
Choice D: 1 mL
The Correct Answer is B
Choice A rationale:
0.25 mL - The nurse should not administer 0.25 mL because the available concentration of vitamin K injection is 1 mg/0.5 mL. To achieve the prescribed dose of 1 mg, administering only 0.25 mL would be insufficient.
Choice B rationale:
0.5 mL - This is the correct choice. The nurse should administer 0.5 mL of the vitamin K injection to deliver 1 mg of vitamin K, as the concentration of the injection is 1 mg/0.5 mL. By giving the full 0.5 mL, the newborn will receive the appropriate 1 mg dose.
Choice C rationale:
0.75 mL - Administering 0.75 mL would be excessive for the prescribed 1 mg dose of vitamin K. It is unnecessary to give a higher volume than required, as it could lead to potential adverse effects or wastage.
Choice D rationale:
1 mL - Similarly, administering the entire 1 mL of the vitamin K injection would result in doubling the prescribed dose, leading to potential overdose and adverse reactions. The nurse should avoid administering more than the necessary 0.5 mL.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
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.
Correct Answer is B
Explanation
Choice A rationale:
Fetal head compression is unlikely to cause variable decelerations in the fetal heart rate. During contractions and labor, the fetal head may experience pressure, but this usually leads to early decelerations, not variable decelerations. Early decelerations are considered benign and are caused by the head's pressure stimulating the vagus nerve, resulting in a temporary decrease in heart rate.
Choice B rationale:
Umbilical cord compression is a known cause of variable decelerations in the fetal heart rate. When the umbilical cord is compressed, it can temporarily disrupt blood flow and oxygen supply to the fetus, leading to decelerations. Variable decelerations often appear as abrupt, sharp drops in the fetal heart rate and are typically characterized by their unpredictable
nature.
Choice C rationale:
Maternal opioid administration is not a direct cause of variable decelerations in the fetal heart rate. While opioids can cross the placenta and may affect the fetus, they are more likely to cause other issues, such as respiratory depression in the newborn, rather than variable decelerations.
Choice D rationale:
Uteroplacental insufficiency is not the primary factor causing variable decelerations. Uteroplacental insufficiency refers to an inadequate blood flow and oxygen delivery to the placenta, which can lead to late decelerations in the fetal heart rate, not variable decelerations.
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