what is the primary function of the hemoglobin in red blood cells
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Nursing Elites

HESI LPN

HESI PN Exit Exam 2023

1. What is the primary function of hemoglobin in red blood cells?

Correct answer: A

Rationale: The primary function of hemoglobin in red blood cells is to transport oxygen from the lungs to body tissues and return carbon dioxide from the tissues to the lungs. Hemoglobin binds to oxygen in the lungs and releases it in the body's tissues. Choice B is incorrect because hemoglobin is not involved in protecting the body from infections. Choice C is incorrect because blood clotting is mainly facilitated by platelets and clotting factors, not hemoglobin. Choice D is incorrect because the regulation of body temperature is mainly controlled by processes like sweating and shivering, not by hemoglobin.

2. A post-operative client is prescribed sequential compression devices (SCDs) while on bed rest. What is the primary purpose of this device?

Correct answer: A

Rationale: The correct answer is A: 'To prevent deep vein thrombosis (DVT).' Sequential compression devices (SCDs) are primarily used to prevent deep vein thrombosis (DVT) by promoting blood flow in the legs and reducing venous stasis, which is a common risk for post-operative clients who are on bed rest. While SCDs do improve circulation in the legs indirectly, their primary purpose is DVT prevention. Preventing pressure ulcers is typically achieved through repositioning and support surfaces, not with SCDs, making choice C incorrect. SCDs are not used to alleviate post-operative pain, so choice D is also incorrect.

3. A child with glomerulonephritis is admitted in the acute edematous phase. Based on this diagnosis, which nursing intervention should the PN plan to include in the child's plan of care?

Correct answer: C

Rationale: The correct answer is to measure blood pressure every 4 to 6 hours. In glomerulonephritis, monitoring blood pressure is crucial as hypertension is a common complication. This helps in assessing the child's condition and response to treatment. Choice A, recommending parents bring favorite snacks, is not related to managing glomerulonephritis. Choice B, encouraging ambulation daily to the playroom, may not be appropriate during the acute edematous phase when the child may be experiencing fluid overload. Choice D, offering a selection of fresh fruit for each meal, is not directly relevant to managing the complications of glomerulonephritis.

4. A client with a chest tube following a pneumothorax is concerned about the continuous bubbling in the water seal chamber. What should the nurse explain to the client?

Correct answer: A

Rationale: Continuous bubbling in the water seal chamber of a chest tube system indicates an air leak. An air leak can prevent the lung from fully re-expanding and may lead to complications like a recurrent pneumothorax. Therefore, it is crucial to investigate and address the air leak promptly. Choices B and C are incorrect because continuous bubbling is not normal and does not indicate lung expansion. Choice D is incorrect because the nurse should first assess and then report the issue to the healthcare provider.

5. A client post-lobectomy is placed on mechanical ventilation. The nurse notices the client is fighting the ventilator. What should the nurse do first?

Correct answer: C

Rationale: The correct first action for the nurse to take when a client is fighting the ventilator is to check the ventilator settings and alarms. This step is crucial to ensure that the ventilator is functioning correctly and providing the necessary support to the client. Increasing sedation (Choice A) should only be considered after confirming that the ventilator settings are appropriate. While manually ventilating the client (Choice B) may be required in some cases, it is not the initial action to take. Suctioning the client's airway (Choice D) is not the priority in this situation, where the primary concern is addressing the client's struggle with the ventilator.

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