Correct Answer: A

Rationale: A positive Chvostek's sign is a clinical indication of low calcium levels, known as hypocalcemia. This sign is elicited by tapping the facial nerve anterior to the ear, resulting in facial muscle twitching. The correct laboratory finding associated with a positive Chvostek's sign is decreased calcium. Elevated potassium (Choice B) is not typically associated with Chvostek's sign but can be seen in conditions like renal failure. Increased sodium (Choice C) is not directly related to Chvostek's sign and is more commonly associated with hypernatremia. Low hemoglobin (Choice D) is not the expected laboratory finding in a client with a positive Chvostek's sign; instead, it suggests anemia, which is unrelated to this clinical manifestation.

Correct Answer: A

Rationale: When drawing medication from a vial, especially for controlled substances like opioids, any wastage must be witnessed by another healthcare professional to ensure accuracy, prevent diversion, and maintain safety standards. This process is crucial for proper documentation and accountability. Recording the amount drawn on the Medication Administration Record (MAR) is important for tracking administered doses and preventing errors. Disposing of the remaining medication in a sharps container is not recommended as it does not address proper wastage documentation. Administering the entire vial of medication just to avoid wastage is inappropriate and can lead to potential harm or overdose in the patient.

Correct Answer: D

Rationale: To ensure the safe movement of a patient who is unable to move and needs to be pulled up in bed, it is essential to use a friction-reducing device. This device helps reduce the risk of injury to both the patient and the healthcare provider by minimizing the effort required to reposition the patient. Placing a pillow under the patient's head and shoulders (Choice A) may provide comfort but does not address the safety concerns associated with moving the patient. Attempting to move the patient alone (Choice B) is not recommended as it can lead to injuries for both the patient and the healthcare provider. Placing the side rails in the up position (Choice C) may not directly contribute to the safe movement of the patient in this scenario.

Correct Answer: C

Rationale: The nurse most likely observed plantar warts, which appear on the sole of the foot and are caused by the papillomavirus. Corns (Choice A) and calluses (Choice B) are areas of thickened skin caused by pressure or friction and are not typically associated with viruses. Athlete's foot (Choice D) is a fungal infection that usually affects the skin between the toes and is not caused by a virus like plantar warts.

Correct Answer: D

Rationale: The correct answer is D. When performing fecal occult blood testing, it is crucial to inform the client that the specimen must not be contaminated with urine to prevent false results. Choices A and B are incorrect because eating more protein is not required before testing, and multiple stool specimens may be necessary for accurate results, respectively. Additionally, regarding choice C, a red color change, not blue, indicates a positive test result, making it an incorrect option.