what is the primary cause of diabetic ketoacidosis dka
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HESI LPN

HESI PN Exit Exam 2024

1. What is the primary cause of diabetic ketoacidosis (DKA)?

Correct answer: A

Rationale: The correct answer is A: Insulin deficiency. Diabetic ketoacidosis occurs due to a severe lack of insulin, causing the body to break down fat for energy, leading to the production of ketones and acidification of the blood. Option B, Overhydration, is incorrect as DKA is characterized by dehydration rather than overhydration. Option C, Excess carbohydrate intake, is incorrect because while high blood sugar levels can contribute to DKA, the primary cause is insulin deficiency. Option D, Excess insulin, is also incorrect as DKA is not caused by an excess of insulin but rather by a lack of it.

2. Which intervention is most appropriate when caring for a patient experiencing a tonic-clonic seizure?

Correct answer: C

Rationale: During a tonic-clonic seizure, the priority is to ensure patient safety by maintaining an open airway to prevent aspiration. Turning the patient to the side helps achieve this goal by allowing any fluids to drain out of the mouth, reducing the risk of choking or aspiration. Restraint can lead to injury, placing a tongue depressor can cause harm or obstruct the airway further, and attempting to stop the seizure by holding the patient's arms is ineffective and can also result in injury. Therefore, the most appropriate intervention is to turn the patient to the side.

3. While providing oral care for a client who is unconscious, the nurse positions the client laterally and uses a basin to collect secretions. Which intervention is best for the nurse to implement?

Correct answer: B

Rationale: Using oral swabs with normal saline is the best intervention in this scenario as it effectively cleans the oral cavity without causing irritation or dryness, which is crucial for an unconscious client. Swabbing the oral cavity with a washcloth may not provide thorough cleaning, and it can potentially cause irritation. Providing a Yankauer tip for oral suction is not necessary unless there are excessive secretions that need to be suctioned. Supporting the head with a small pillow, although important for comfort, is not directly related to oral care in an unconscious client.

4. What is the most common genetic cause of intellectual disability?

Correct answer: B

Rationale: The correct answer is Fragile X syndrome because it is the most common inherited cause of intellectual disability, resulting from a mutation in the FMR1 gene. Down syndrome, Prader-Willi syndrome, and Turner syndrome are not the most common genetic causes of intellectual disability. Down syndrome is caused by the presence of an extra chromosome 21, Prader-Willi syndrome results from specific genetic abnormalities on chromosome 15, and Turner syndrome is characterized by the absence of part or all of one of the X chromosomes.

5. The UAP reports to the PN that an assigned client experiences SOB when the bed is lowered for bathing. Which action should the PN implement?

Correct answer: B

Rationale: Advising the UAP to allow the client to rest before completing the bath is the most appropriate action to take. This helps manage the shortness of breath (SOB) experienced by the client and prevents further stress. By giving the client time to rest, the PN ensures the client's comfort and safety during care activities. The other options are not the most immediate or appropriate actions in this scenario: obtaining further data about activity intolerance (choice A) may delay addressing the current issue, obtaining vital signs and pulse oximetry (choice C) is important but not as immediate as allowing the client to rest, and notifying the healthcare provider (choice D) is premature before trying a simple intervention like allowing the client to rest.

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