A nurse is assessing a newborn's heart rate. Which of the following actions should the nurse take?

Correct Answer: A

Rationale: Corrected Rationale: Auscultating the apical pulse and counting for one minute is the appropriate method to accurately measure a newborn's heart rate. The apical pulse is located at the point of maximum impulse (PMI), which is usually at the fourth or fifth intercostal space along the mid-clavicular line. This method allows for a precise assessment of the newborn's heart rate. Choice B, placing a sensor on the index finger, is incorrect because this method is more suitable for measuring oxygen saturation rather than heart rate. Choice C, heating the skin prior to placing the probe, is unnecessary for assessing heart rate and may lead to potential burns in newborns. Choice D, rechecking after 10 minutes, is not appropriate as immediate assessment and intervention may be required if an abnormal heart rate is detected in a newborn.

Correct Answer: A

Rationale: Verifying the patient's identity is a critical step when administering a blood transfusion to ensure that the correct blood product is given to the right patient. This process helps prevent errors and enhances patient safety. Choice B, 'Administer medication,' is incorrect because the focus during a blood transfusion should be on ensuring the correct blood product is administered. Choice C, 'Monitor vital signs,' is also important but comes after verifying the patient's identity. Choice D, 'Start blood transfusion without verification,' is incorrect and unsafe as patient identification verification is essential prior to starting any medical procedure, especially one as important as a blood transfusion.

Correct Answer: A

Rationale: The correct answer is to administer bronchodilators. During an acute asthma attack, bronchodilators like albuterol are crucial to help dilate the airways and improve breathing. Providing supplemental oxygen (Choice B) may be necessary but is not the priority intervention. Starting IV fluids (Choice C) and monitoring oxygen saturation (Choice D) are important aspects of care but are not the most critical interventions during an acute asthma attack.

Correct Answer: C

Rationale: The Mantoux skin test, also known as the Tuberculin Skin Test (TST), is used to confirm tuberculosis (TB) infection. This test involves injecting a small amount of tuberculin protein derivative under the top layer of the skin and then evaluating the immune system's response to the protein. A positive reaction indicates exposure to the TB bacteria. Chest X-rays are used to detect abnormalities in the lungs caused by TB but are not confirmatory. Sputum culture is used to identify the presence of TB bacteria in the sputum. MRIs are not typically used as a primary diagnostic tool for TB.

Correct Answer: B

Rationale: The correct answer is B: Monitor serum creatinine. Serum creatinine is a key indicator of renal function as it reflects the glomerular filtration rate. An increase in serum creatinine levels indicates impaired kidney function. Checking blood glucose levels (choice A) is not specific to assessing renal function but is used to diagnose diabetes. Monitoring BUN (choice C) is important but not as specific as serum creatinine in assessing renal function. Checking electrolyte levels (choice D) is essential in assessing kidney function but is not as specific as monitoring serum creatinine.