Correct Answer: C

Rationale: In a client with left-sided heart failure, the presence of crackles in the lungs is the most critical finding that should be reported to the healthcare provider immediately. Crackles indicate pulmonary congestion, which requires prompt intervention to prevent respiratory compromise. Shortness of breath, though a common symptom in heart failure, is a result of pulmonary congestion, making crackles a more direct indicator of the severity of the condition. Jugular venous distention and elevated liver enzymes are important to assess in heart failure but are not as immediately concerning as crackles in the lungs, which directly reflect the impact of heart failure on the respiratory system.

Correct Answer: D

Rationale: A water-soluble lubricant is safe to use in conjunction with oxygen therapy, unlike petroleum jelly which is flammable.

Correct Answer: C

Rationale: In a client with left-sided heart failure, the presence of crackles in the lungs is the most critical finding that should be reported to the healthcare provider immediately. Crackles indicate pulmonary congestion, which requires prompt intervention to prevent respiratory compromise. Shortness of breath, though a common symptom in heart failure, is a result of pulmonary congestion, making crackles a more direct indicator of the severity of the condition. Jugular venous distention and elevated liver enzymes are important to assess in heart failure but are not as immediately concerning as crackles in the lungs, which directly reflect the impact of heart failure on the respiratory system.

Correct Answer: C

Rationale: Serum creatinine should be closely monitored in a client receiving methotrexate, as the medication can cause nephrotoxicity. Monitoring serum creatinine levels helps assess kidney function and detect potential nephrotoxic effects of methotrexate. Liver function tests (Choice A) are important to monitor for hepatotoxicity caused by methotrexate. While methotrexate can cause bone marrow suppression, leading to anemia, leukopenia, and thrombocytopenia, monitoring a complete blood count (Choice B) is essential but not the priority in this case. Prothrombin time (Choice D) is not typically affected by methotrexate therapy and is not the primary laboratory value to monitor in this situation.

Correct Answer: B

Rationale: The correct answer is B: 'Report increased bruising or bleeding.' Enalapril, an ACE inhibitor, can lead to thrombocytopenia, a condition characterized by a low platelet count, which increases the risk of bruising and bleeding. Instructing the client to report any signs of increased bruising or bleeding is crucial for monitoring and managing this potential side effect. Choices A, C, and D are incorrect: A - Increasing potassium-rich foods is not directly related to the side effects of enalapril. C - Developing a cough is a common side effect of ACE inhibitors, but it does not warrant stopping the medication unless advised by a healthcare provider. D - Limiting intake of leafy green vegetables is not necessary with enalapril unless specifically instructed by a healthcare provider for individual reasons.