A male patient with blood type AB, Rh factor positive needs a blood transfusion. The Transfusion Service (blood bank) sends type O, Rh factor negative blood to the unit for the nurse to infuse into this patient. The nurse knows that:

Correct Answer: A

Rationale: In this case, the blood type of the donor (type O, Rh-negative) is not compatible with the blood type of the patient (type AB, Rh-positive). Blood type AB individuals can receive blood from all blood types (universal recipient), but they can only donate to individuals with the same blood type. Therefore, if a patient with blood type AB receives a transfusion of type O blood, it will lead to a major incompatibility reaction, possibly resulting in serious complications such as hemolysis (destruction of red blood cells), renal failure, and even death. It is crucial for the nurse to verify the blood type of the patient and ensure that the correct blood type is provided to prevent such adverse reactions.

Correct Answer: A

Rationale: Testosterone patches require placement on hair-free skin to ensure proper adhesion and absorption, as hair can block drug delivery, reducing efficacy. Active areas like the thigh or arm are suitable if hairless and dry, contrary to avoidance claims-rotation across such sites is standard. Patches are changed daily, not weekly, for consistent hormone levels. Rash observation is key due to potential skin irritation, a common side effect. Hair-free placement is critical education, directly impacting bioavailability, unlike timing or site activity, which follow secondary guidelines, ensuring effective therapy for hypogonadism or related conditions.

Correct Answer: A

Rationale: Nitroglycerin dilates vessels, relieving angina but risking hypotension. BP of 90/60 mmHg indicates excessive drop, requiring immediate action (e.g., stopping infusion) to prevent shock. Heart rate of 80 and respiratory rate of 16 are normal. Pain at 2/10 shows efficacy. Hypotension's threat to perfusion aligns with nitroglycerin's effect, critical in chest pain where stability is key, making A the finding needing swift response.

Correct Answer: D

Rationale: When providing discharge teaching for a patient being discharged with furosemide (Lasix), it is essential to include instructions for monitoring weight. Weight changes can indicate fluid retention or loss, which is crucial in managing heart failure or other conditions where furosemide is prescribed. Instructing the patient to weigh themselves once a week and report a gain or loss of more than 1 lb (or as directed by their healthcare provider) helps to assess the effectiveness of the medication and detect any potential issues early on. This proactive approach can assist in preventing complications and optimizing the therapeutic benefits of furosemide.

Correct Answer: A

Rationale: Fetal alcohol syndrome (FAS) from alcohol causes growth restriction, microcephaly, flat midface, and cardiac defects. Cocaine , Marijuana , Opioids , and Tobacco (E) don't fully match. Alcohol's teratogenicity explains the infant's features.