HESI Fundamentals Study Guide

Correct Answer: A

Rationale: Severe diarrhea can lead to metabolic acidosis due to the loss of bicarbonate. When there is excessive loss of bicarbonate through diarrhea, the pH of the blood decreases, leading to metabolic acidosis. Metabolic alkalosis (Choice B) is not typically associated with severe diarrhea as it involves elevated pH and bicarbonate levels. Hyperkalemia (Choice C) is less likely with severe diarrhea as potassium is often lost along with fluids. Hypercalcemia (Choice D) is not a common complication of severe diarrhea; instead, hypocalcemia may occur due to malabsorption of calcium.

Correct Answer: A

Rationale: The correct action for a healthcare professional planning to insert an IV for an older adult client is to place the client's arm in a dependent position. This positioning helps with vein prominence and facilitates easier IV insertion by enhancing blood flow and distending the veins. Placing the arm in a flexed position or elevating it to the level of the heart can impede vein visualization and make insertion more challenging. Using a tourniquet above the insertion site is a step in the IV insertion process but is not the initial action to take when preparing for the procedure.

Correct Answer: A

Rationale: Checking the client for injuries is the priority when finding them on the bathroom floor. This action ensures the client's safety as it allows for immediate assessment of any potential harm. Calling for help may be necessary, but assessing for injuries takes precedence to address any immediate threats to the client's well-being. Moving the client to a sitting position or assisting them back to bed should only be done after ensuring there are no serious injuries requiring prompt medical attention. Therefore, the correct first action is to check the client for injuries.

Correct Answer: C

Rationale: Perineal care should be encouraged to be done by the patient if they are capable of performing self-care. In this scenario, the patient is not ambulatory and has full function of all extremities, indicating that the patient can independently perform perineal care. Encouraging self-care promotes independence and maintains the patient's dignity. Postponing perineal care (Choice A) is incorrect because it is essential for hygiene. Choice B is incorrect as perineal care is necessary for all patients regardless of circumcision status. Choice D is incorrect as the patient is capable of performing the care independently, and promoting self-care is a priority in nursing practice.

Correct Answer: A

Rationale: The correct answer is A: 'Potassium 5.4'. A potassium level of 5.4 is elevated (normal range is typically 3.5-5.0 mEq/L) and may indicate hyperkalemia, which can have serious cardiac implications. Elevated potassium levels can lead to life-threatening arrhythmias, so immediate reporting and intervention are necessary. Choice B, 'Sodium 140', falls within the normal range (135-145 mEq/L) and does not require immediate reporting. Choice C, 'Calcium 8.6', falls within the normal range (8.5-10.5 mg/dL) and is not an immediate concern. Choice D, 'Magnesium 2.0', is within the normal range (1.5-2.5 mEq/L) and does not need urgent reporting. Therefore, the nurse should prioritize reporting the elevated potassium level as it poses the most immediate risk.