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. While turning and positioning a bedfast client, the PN observes that the client is dyspneic. Which action should the PN take first?

Correct answer: C

Rationale: Notifying the charge nurse promptly is the priority when a bedfast client is dyspneic. Dyspnea can indicate a serious problem that requires immediate assessment and intervention. Contacting the charge nurse ensures timely assistance and appropriate actions to address the client's condition. Applying a pulse oximeter or measuring blood pressure may provide valuable data, but the priority is prompt communication with the charge nurse to ensure quick intervention. Observing pressure areas, while important for overall client care, is not the most immediate action needed when a client is experiencing dyspnea.

3. A male client with TB returns to the clinic for daily antibiotic injections for a urinary infection. The client has been taking anti-tubercular medications for 10 weeks and states he has ringing in his ears. Which prescribed medication should the PN report to the HCP?

Correct answer: B

Rationale: The correct answer is B: Gentamicin 160 mg IM daily. Gentamicin is an aminoglycoside antibiotic that can cause ototoxicity, leading to ringing in the ears (tinnitus). This symptom should be reported to the HCP immediately, as it may indicate a need to adjust or discontinue the medication. Choice A, Pyridoxine with a B complex multivitamin, is not the cause of ototoxicity. Choices C and D, Rifampin and Isoniazid, are anti-tubercular medications but are not associated with causing ringing in the ears.

4. The PN is reviewing instructions for the use of pilocarpine eye drops with a client who has glaucoma. The client replies that the drops are used to anesthetize the eye if eye pain is experienced. What action should the PN implement?

Correct answer: C

Rationale: Pilocarpine eye drops are used to reduce intraocular pressure in glaucoma, not to anesthetize the eye. The PN should reteach the client about the purpose of the medication to ensure proper use and understanding, which is crucial for effective treatment. Choice A is incorrect because just documenting understanding without addressing the client's misconception is not enough. Choice B is incorrect as it provides incorrect information about the purpose of the eye drops and may lead to further misunderstanding. Choice D is incorrect as it provides inaccurate information stating that the drops provide pain relief, which is not their primary purpose.

5. Which of the following dietary modifications should be recommended for a patient with chronic kidney disease (CKD)?

Correct answer: C

Rationale: A low sodium, low potassium diet is often recommended for patients with CKD to manage fluid balance and prevent electrolyte imbalances that the kidneys can no longer regulate effectively. High protein diets, as mentioned in choice A, can put extra strain on the kidneys, making it an incorrect choice. Choice B, which suggests a low protein, high potassium diet, is also incorrect because high potassium levels can be harmful to individuals with CKD. Choice D, advocating for a high calcium, low phosphorus diet, is not the typical dietary recommendation for CKD patients, even though managing calcium and phosphorus levels is important in their diet.

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