Nursing Elites

1. When teaching a class about trisomy 21, the instructor would identify the cause of this disorder as:

• A. nondisjunction.
• B. X-linked recessive inheritance.
• C. genomic imprinting.
• D. autosomal dominant inheritance.

Correct answer: A

Rationale: The correct answer is A: nondisjunction. Trisomy 21, also known as Down syndrome, is caused by nondisjunction, which is an error in cell division leading to an extra copy of chromosome 21. This additional genetic material alters the course of development and causes the characteristics associated with Down syndrome. Choices B, C, and D are incorrect. X-linked recessive inheritance refers to genetic disorders carried on the X chromosome, genomic imprinting involves gene expression based on parental origin, and autosomal dominant inheritance relates to disorders caused by a dominant gene on one of the non-sex chromosomes. In the case of trisomy 21, the cause is specifically related to the error in chromosome division, making nondisjunction the most appropriate answer.

2. A nurse is caring for an infant with phenylketonuria (PKU). What diet should the nurse anticipate will be ordered by the healthcare provider?

• A. Fat-free
• B. Protein-enriched
• C. Phenylalanine-free
• D. Low-phenylalanine

Correct answer: D

Rationale: A low-phenylalanine diet is necessary for infants with PKU because it helps prevent the accumulation of phenylalanine, which can result in brain damage. Fat-free (Choice A) and protein-enriched (Choice B) diets are not specifically indicated for PKU. While phenylalanine-free (Choice C) may seem logical, complete elimination of phenylalanine is not practical or safe as it is an essential amino acid. Therefore, the correct choice is a low-phenylalanine diet, which restricts phenylalanine intake to a safe level.

3. What is the priority intervention for a child with acute laryngotracheobronchitis upon admission?

• A. Pad the side rails of the crib.
• B. Arrange for a quiet, cool room.
• C. Place a tracheotomy set at the bedside.
• D. Obtain a recliner for a parent to stay.

Correct answer: C

Rationale: The correct priority intervention for a child with acute laryngotracheobronchitis is to place a tracheotomy set at the bedside. Acute laryngotracheobronchitis can lead to airway obstruction, making it essential to have the equipment readily available in case of emergency. Padding the side rails, arranging for a quiet room, or obtaining a recliner for a parent are not the immediate priorities in managing a child with this condition.

4. What would be important for the nurse to include when teaching an adolescent about tinea pedis?

• A. Keep your feet moist and exposed to the air as much as possible.
• B. Dry the area between your toes thoroughly.
• C. Wear nylon or synthetic socks every day.
• D. Walk barefoot in the school locker room.

Correct answer: B

Rationale: The correct answer is B: 'Dry the area between your toes thoroughly.' When educating an adolescent about tinea pedis, emphasis should be placed on keeping the feet dry, especially between the toes, to minimize the risk of fungal infection. Choice A is incorrect as keeping the feet moist can exacerbate the condition. Choice C is incorrect because nylon or synthetic socks can trap moisture, promoting fungal growth. Choice D is incorrect as walking barefoot in locker rooms increases the risk of contracting tinea pedis from contaminated surfaces.

5. A newborn is admitted to the neonatal intensive care unit (NICU) with choanal atresia. Which part of the infant’s body should the nurse assess?

• A. Rectum
• B. Nasopharynx
• C. Intestinal tract
• D. Laryngopharynx

Correct answer: B

Rationale: Choanal atresia is a congenital condition that presents with a blockage in the nasal passages at the junction of the nasal cavity and the nasopharynx. To assess and confirm the diagnosis of choanal atresia, the nurse should focus on assessing the nasopharynx. Choices A, C, and D are incorrect as choanal atresia specifically involves a blockage in the nasal passages, not the rectum, intestinal tract, or laryngopharynx. By assessing the nasopharynx, the severity of the obstruction can be determined, aiding in planning appropriate interventions for the newborn.

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