which is a causative factor of hirschsprung disease
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Medical Surgical Assignment Exam HESI

1. What is a causative factor of Hirschsprung disease?

Correct answer: C

Rationale: The correct answer is C: The absence of parasympathetic ganglion cells in a portion of the colon is a causative factor of Hirschsprung disease. This absence leads to the inability of the affected segment of the colon to relax, causing a functional obstruction. Choices A, B, and D are incorrect. Frequent evacuation of solids, liquid, and gases, excessive peristaltic movement, and one portion of the bowel telescoping into another are not causative factors of Hirschsprung disease.

2. Which statement correctly explains the etiology of Down syndrome?

Correct answer: A

Rationale: The correct answer is A: 'There is an extra chromosome on the 21st pair.' Down syndrome is caused by the presence of an extra copy of chromosome 21, known as trisomy 21. This additional genetic material leads to the characteristics associated with Down syndrome. Choices B, C, and D are incorrect because Down syndrome is not due to a missing chromosome or having two pairs of the 21st chromosome; it results from the presence of an extra chromosome on the 21st pair.

3. An older adult with chronic obstructive pulmonary disease (COPD) was recently admitted to the hospital with heart failure (HF). Which actions should the nurse take in providing care? (Select all that apply)

Correct answer: D

Rationale: In a patient with COPD and HF, monitoring electrolyte levels is essential due to potential imbalances caused by medications or fluid shifts. Maintaining pulse oximetry is crucial to assess oxygenation status in COPD and HF. Providing assistance with mobility helps prevent deconditioning and complications. Therefore, all the actions mentioned are necessary for comprehensive care in this scenario, making option D the correct answer. Choices A, B, and C are all important aspects of managing COPD and HF, ensuring holistic and effective care.

4. What is a priority action for the nurse when caring for a client with suspected meningitis?

Correct answer: B

Rationale: Administering intravenous antibiotics is the priority when caring for a client with suspected meningitis. The prompt administration of antibiotics is crucial to treat bacterial meningitis and prevent potential complications. Isolating the client in a private room may be necessary to prevent the spread of infection, but antibiotic administration takes precedence. Obtaining a throat culture and performing a chest x-ray are important diagnostic measures, but they do not address the immediate need for antibiotic therapy in suspected bacterial meningitis.

5. Twelve hours following a unilateral total knee replacement, a client reports being unable to sleep because of severe incisional pain. What is the best initial nursing action?

Correct answer: D

Rationale: Instructing the client in the use of the PCA pump is the best initial nursing action for managing severe incisional pain after knee replacement surgery. The PCA pump allows the client to self-administer pain medication effectively, promoting better pain management. Administering a sedative may mask the pain temporarily but doesn't address the root cause. Repositioning the client for comfort or applying ice packs may provide some relief but doesn't address the need for effective pain control as the PCA pump does.

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