Correct Answer: D

Rationale: During a 12-lead ECG, the client needs to remain still to obtain accurate readings. Therefore, instructing the client to remain still is essential. Choices A, B, and C are incorrect because fasting is not necessary for an ECG, providing a warm blanket is not a standard procedure, and applying cold compresses may interfere with the ECG results.

Correct Answer: C

Rationale: The correct answer is C: 'Cut toenails straight across.' This instruction is crucial for clients with diabetes to prevent ingrown toenails and potential foot complications. Soaking feet in hot water daily (Choice A) can lead to skin damage and is not recommended for diabetic individuals. Using a heating pad on the feet daily (Choice B) can cause burns or injuries due to reduced sensation in the feet that often accompanies diabetes. Massaging feet with lotion daily (Choice D) is generally safe but may not address the specific preventive measure of cutting toenails correctly.

Correct Answer: B

Rationale: The correct answer is B: 'Keep oxygen tanks upright at all times.' Oxygen tanks should be stored in an upright position to prevent leaks and accidents. Choice A is incorrect as smoking should never be allowed near oxygen due to the risk of fire. Choice C is incorrect as oxygen equipment should be stored in a well-ventilated area, not in a closet. Choice D is incorrect as oxygen tanks must be kept a minimum of 5 to 10 feet away from heat sources to prevent combustion. Therefore, the best practice is to keep oxygen tanks upright to ensure safety.

Correct Answer: A

Rationale: The correct answer is A: Electrolyte imbalance and dehydration. Diabetic ketoacidosis can lead to imbalances in electrolytes such as potassium, sodium, and chloride, as well as dehydration due to excess urination and vomiting. These complications should be managed promptly with appropriate fluids and insulin. Choices B, C, and D are incorrect. Hypoglycemia and increased urination are not typical complications of diabetic ketoacidosis; kidney failure and respiratory distress may occur in severe cases but are not the primary complications. Liver failure and hypertension are not directly associated with diabetic ketoacidosis.

Correct Answer: A

Rationale: The correct answer is A: Administer oxygen and provide breathing exercises. These interventions are essential in managing COPD as they help improve lung function and oxygenation. Choice B is incorrect as suctioning airway secretions and encouraging coughing are not typically indicated for COPD patients. Choice C is incorrect as while administering bronchodilators is common in COPD treatment, monitoring oxygen saturation alone is not a comprehensive intervention. Choice D is incorrect as restricting fluids is not a standard intervention for COPD, and encouraging mobility, although beneficial, is not as directly related to managing COPD symptoms as administering oxygen and providing breathing exercises.