a new mother has some questions about phenylketonuria pku which of the following statements made by a nurse is not correct regarding pku

NCLEX-RN

NCLEX RN Practice Questions Quizlet

1. A new mother has some questions about phenylketonuria (PKU). Which of the following statements made by a nurse is not correct regarding PKU?

A. A Guthrie test can check the necessary lab values.
B. The urine has a high concentration of phenylpyruvic acid
C. Mental deficits are often present with PKU
D. The effects of PKU are reversible

Correct answer: D

Rationale: Phenylketonuria (PKU) is an inherited disorder that increases the levels of phenylalanine (a building block of proteins) in the blood. If PKU is not treated, phenylalanine can build up to harmful levels in the body, causing intellectual disability and other serious health problems. The signs and symptoms of PKU vary from mild to severe. The most severe form of this disorder is known as classic PKU. Infants with classic PKU appear normal until they are a few months old. Without treatment, these children develop a permanent intellectual disability. Seizures, delayed development, behavioral problems, and psychiatric disorders are also common. Untreated individuals may have a musty or mouse-like odor as a side effect of excess phenylalanine in the body. Children with classic PKU tend to have lighter skin and hair than unaffected family members and are also likely to have skin disorders such as eczema. The effects of PKU stay with the infant throughout their life (via Genetic Home Reference).

2. A nonimmunized child appears at the clinic with a visible rash. Which of the following observations indicates the child may have rubeola (measles)?

A. Small blue-white spots are visible on the oral mucosa.
B. The rash begins on the trunk and spreads outward.
C. There is low-grade fever.
D. The lesions have a "teardrop-on-a-rose-petal"? appearance.

Correct answer: A

Rationale: The presence of small blue-white spots on the oral mucosa, known as Koplik's spots, is characteristic of measles (rubeola) infection. These spots typically appear on the buccal mucosa opposite the second molars, 1-2 days before the rash onset, and last until 2 days after the rash appears. While Koplik's spots are pathognomonic for measles, their absence does not rule out the diagnosis. Therefore, choice A is the correct answer. Choices B, C, and D are incorrect because the rash pattern, presence of low-grade fever, and characteristic appearance of lesions are not specific indicators of measles infection.

3. Which of the following is an example of restorative care?

A. A nurse teaches a new mother how to breastfeed her infant
B. A nurse helps a client with developing a bladder-retraining program
C. A nurse places an allergy wristband on a client's wrist to notify other providers of potential reactions
D. A nurse contacts the family of a client to tell them he will be out of surgery soon

Correct answer: B

Rationale: Restorative care involves assisting clients in regaining or maintaining their highest possible level of function. This type of care focuses on promoting self-care and independence by helping clients perform activities that enhance their functional abilities. In this scenario, a nurse who assists a client with developing a bladder-retraining program is engaging in restorative care by helping the client regain bladder function. Choices A, C, and D do not represent restorative care. Teaching a new mother how to breastfeed her infant (Choice A) is an example of educative care, placing an allergy wristband (Choice C) is a safety measure, and contacting a client's family to update them on surgery (Choice D) is related to communication and support, not restorative care.

4. A child has recently been diagnosed with Duchenne muscular dystrophy (DMD). The parents are receiving genetic counseling prior to planning another pregnancy. Which of the following statements includes the most accurate information?

A. Duchenne is an X-linked recessive disorder, so daughters have a 50% chance of being carriers and sons a 50% chance of developing the disease.
B. Duchenne is an X-linked recessive disorder, so both daughters and sons have a 50% chance of developing the disease.
C. Each child has a 1 in 4 (25%) chance of developing the disorder.
D. Sons only have a 1 in 4 (25%) chance of developing the disorder.

Correct answer: A

Rationale: The correct answer is that Duchenne is an X-linked recessive disorder, meaning the affected gene is located on one of the two X chromosomes of a female carrier. If a son receives the X chromosome bearing the gene, he will develop the disease, giving him a 50% chance of being affected. Daughters, on the other hand, are not affected by Duchenne but have a 50% chance of being carriers since they inherit one copy of the defective gene from the mother. The other X chromosome is inherited from the father, who cannot be a carrier. Therefore, choice A is accurate. Choice B is incorrect because daughters do not develop the disease, and sons have a 50% chance of developing, not both having a 50% chance. Choice C is incorrect as it does not consider the X-linked inheritance pattern of Duchenne. Choice D is inaccurate as it incorrectly states that only sons have a 25% chance of developing the disorder, omitting the carrier status of daughters.

5. Which of the following statements best describes compartment syndrome?

A. An injury causes pain and tingling that starts in the buttock and travels down the leg.
B. An injury causes swelling within muscle tissue that leads to anoxia of nerves and muscles.
C. An injury causes permanent flexion of the interphalangeal joint, resulting in deformity.
D. An injury causes pain and swelling of the median plantar nerve.

Correct answer: B

Rationale: Compartment syndrome is characterized by swelling and increased pressure within a muscle compartment, leading to decreased blood flow and oxygen supply to nerves and muscles. This can result from various causes, such as trauma or the application of a cast after a fracture. If left untreated, compartment syndrome can lead to tissue necrosis. Choice A is incorrect as pain and tingling starting in the buttock and traveling down the leg are not specific features of compartment syndrome. Choice C is incorrect as permanent flexion of the interphalangeal joint is unrelated to compartment syndrome. Choice D is incorrect as pain and swelling of the median plantar nerve do not describe compartment syndrome.