Correct Answer: C

Rationale: Using a nasal cannula to deliver oxygen at a low flow rate is the appropriate intervention for clients with COPD receiving oxygen therapy. High flow rates can lead to respiratory depression in COPD patients. This intervention helps maintain a safe and controlled oxygen delivery to prevent potential complications associated with high oxygen flow rates.

Correct Answer: A

Rationale: Using a soft-bristled toothbrush is essential for clients at risk of thrombocytopenia to prevent gum bleeding, as their platelet counts may be low. Vigorous brushing with a hard-bristled toothbrush can injure the gums, leading to bleeding, which can be exacerbated in clients with low platelets. Therefore, advising the client to use a soft-bristled toothbrush is a crucial precaution to minimize the risk of bleeding.

Correct Answer: C

Rationale: Monitoring blood glucose levels regularly is crucial for clients with type 2 diabetes who are taking metformin. This helps assess the effectiveness of the medication in managing blood sugar levels and allows for timely adjustments in the treatment plan if needed. By monitoring blood glucose levels, the client and healthcare team can work together to achieve optimal diabetes control and prevent complications associated with uncontrolled blood sugar levels.

Correct Answer: C

Rationale: In this scenario, the priority action for the nurse is to place the client in Trendelenburg position. This position helps alleviate pressure on the umbilical cord, preventing compression and ensuring continued blood flow to the fetus. Administering oxygen, notifying the operating room team, or administering a fluid bolus are not the initial priority actions in a cord prolapse situation.

Correct Answer: A

Rationale: Diabetes insipidus is characterized by the kidneys' inability to concentrate urine, leading to decreased urine specific gravity. This results in the excretion of large volumes of dilute urine, causing a decrease in urine specific gravity. Therefore, when evaluating a suspected case of diabetes insipidus, a finding of decreased urine specific gravity is indicative of this condition.