Correct Answer: C

Rationale: Alpha1-antitrypsin (AAT) deficiency is associated with a higher risk of chronic obstructive pulmonary disease (COPD), especially if the individual smokes. This condition is caused by a recessive gene. Individuals with one allele typically produce enough AAT to prevent COPD unless they smoke. However, those with two alleles are at high risk for COPD even without exposure to smoke or other irritants. Being a carrier of AAT deficiency does not guarantee that one's children will develop the disease; it depends on the AAT levels of the partner. While involving a genetic counselor may be beneficial in the long run, the immediate concern of the client's question should be addressed first.

Correct Answer: B

Rationale: If the drainage from the chest tube decreases significantly, it may indicate a blockage by a clot, potentially leading to cardiac tamponade. The nurse's priority action should be to notify the healthcare provider immediately for further evaluation and intervention. Increasing suction, re-positioning the chest tube, or disassembling the tubing independently are not appropriate actions without healthcare provider guidance in this situation.

Correct Answer: B

Rationale: The presence of expired food in the refrigerator is concerning as it raises safety issues for the client and indicates potential financial constraints preventing them from buying fresh food. The nurse should consider referring the client to services like Meals on Wheels or other home-based food programs to address this issue and ensure the client's nutritional needs are met.

Correct Answer: D

Rationale: Assessing the client for allergies, particularly to iodine or shellfish, is crucial before a cardiac catheterization because the contrast dye used during the procedure can lead to allergic reactions. Identifying any allergies beforehand allows the healthcare team to take necessary precautions to prevent potential adverse reactions and ensure the client's safety.

Correct Answer: B

Rationale: In acute renal failure, monitoring serum potassium is crucial because impaired kidney function can lead to hyperkalemia, which can result in life-threatening cardiac dysrhythmias. Elevated potassium levels need close monitoring and prompt interventions to prevent serious complications.