which vitamin deficiency is most associated with night blindness
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HESI PN Exit Exam 2023

1. Which vitamin deficiency is most associated with night blindness?

Correct answer: A

Rationale: The correct answer is Vitamin A. Vitamin A deficiency leads to night blindness because this vitamin is crucial for the formation of rhodopsin, a photopigment in the retina. Rhodopsin is essential for vision in low-light conditions. Vitamin B12 deficiency can lead to anemia and neurological issues but is not directly related to night blindness. Vitamin C deficiency can cause scurvy, affecting connective tissues, but not night vision. Vitamin D deficiency can lead to bone disorders but is not primarily associated with night blindness.

2. An older client is admitted to the psychiatric unit for assessment of a recent onset of dementia. The PN notes that in the evening this client often becomes restless, confused, and agitated. Which intervention is most important for the PN to implement?

Correct answer: C

Rationale: Sundowning, a phenomenon where dementia symptoms worsen in the evening, can be managed by ensuring the client is close to the nurses' station for frequent monitoring and quick intervention, if necessary. This reduces the risk of harm and helps manage agitation. Asking family members to remain with the client may not always be feasible and does not address the need for close monitoring. Administering benzodiazepines should not be the first-line intervention for sundowning as it can increase the risk of falls and other adverse effects. Postponing medication administration may disrupt the client's routine and potentially worsen symptoms.

3. A nurse who receives a patient in the operative suite prior to the actual surgery is in charge of the patient’s care. Which of the following is NOT a task related to the nurse’s intraoperative care?

Correct answer: A

Rationale: The correct answer is A. Going over the surgical procedure with the patient is typically done preoperatively, not intraoperatively. Intraoperative tasks of a nurse involve strictly adhering to asepsis during procedures, monitoring the patient's physical status, and providing emotional support to the patient and their family during the surgery. Choices B, C, and D are all tasks that are directly related to the nurse's responsibilities during the intraoperative phase of care.

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. In which condition is the 'butterfly rash' most commonly seen?

Correct answer: A

Rationale: The correct answer is A: Systemic lupus erythematosus (SLE). The 'butterfly rash' across the cheeks and nose is a classic sign of SLE, an autoimmune disease. This rash is a key dermatological manifestation of SLE, often triggered or worsened by exposure to sunlight. Choices B, C, and D are incorrect because the 'butterfly rash' is not commonly associated with rheumatoid arthritis, psoriasis, or dermatomyositis.

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