Correct Answer: D

Rationale: Elevating the client's right arm on a pillow is essential post-mastectomy to reduce swelling and promote circulation. Placing the client in the supine position may not be comfortable or ideal after a mastectomy. Encouraging the client to lift objects with the right arm can strain the surgical site and hinder healing. Measuring the client's blood pressure on the right arm should be avoided to prevent disruption to the area and inaccurate readings.

Correct Answer: A

Rationale: The correct answer is A. Clients with a history of gastroesophageal reflux disease are at risk for aspiration due to the potential of regurgitation, which can lead to aspiration of stomach contents into the lungs. Choice B (receiving a high-osmolarity formula) can lead to issues like diarrhea or dehydration but is not directly related to aspiration. Choice C (sitting in a high-Fowler's position during the feeding) is actually a preventive measure to reduce the risk of aspiration. Choice D (a residual of 65 mL 1 hr post-feeding) is a concern for delayed gastric emptying but not a direct risk factor for aspiration.

Correct Answer: B

Rationale: Encouraging the use of an incentive spirometer is crucial for preventing respiratory complications postoperatively, such as atelectasis. Instructing the client to avoid deep breathing exercises (choice A) is incorrect as deep breathing exercises help prevent respiratory complications. Assisting with ambulation every 2 hours (choice C) is important for preventing other postoperative complications but not specifically respiratory ones. Applying sequential compression devices (SCDs) (choice D) is beneficial for preventing deep vein thrombosis but not directly related to respiratory complications.

Correct Answer: A

Rationale: The correct answer is A: Potassium 3.5 mEq/L. Digoxin can cause hypokalemia as an adverse effect. Monitoring potassium levels is crucial because low potassium levels can increase the risk of digoxin toxicity. Choices B, C, and D are incorrect as they are not directly associated with potential adverse effects of digoxin. Sodium levels are not typically affected by digoxin, calcium levels are not a primary concern with digoxin therapy, and magnesium levels are not the most important to monitor for digoxin adverse effects.

Correct Answer: B

Rationale: The correct answer is B. Wearing loose clothing around the ICD is essential to avoid putting pressure on the device, which can interfere with its function. Choices A, C, and D are incorrect. Soaking in a tub rather than showering is not relevant to ICD care. Stopping the use of a microwave oven is not necessary with an ICD. Holding a cellphone on the same side as the ICD is not recommended as it can potentially interfere with the device.