Pediatrics NUR 335 Exam Questions

Correct Answer: A. Disruptive mood dysregulation disorder (DMDD).

The description of this 10-year-old girl with persistent irritability and recurrent temper outbursts that are grossly out of proportion to the situation, occurring approximately four times a week and affecting both home and school, is most consistent with Disruptive Mood Dysregulation Disorder (DMDD).

DMDD is characterized by:

Severe temper outbursts (verbal rages or physical aggression) that are out of proportion to the situation.

These outbursts occur on average 3 or more times per week.

Irritable or angry mood that is present between outbursts.

Symptoms must be present for at least 12 months and occur in at least two settings (e.g., home, school).

Onset occurs before the age of 10 years.

Why the Other Options are Incorrect:

B. Major depressive disorder (MDD):

While irritability can be a symptom of MDD in children, the key feature of MDD is the presence of depressed mood and loss of interest or pleasure in most activities, which are not mentioned in this case. Additionally, MDD does not typically involve the frequent temper outbursts seen in DMDD.

C. Persistent depressive disorder (dysthymia):

This disorder is characterized by a chronic low mood lasting for at least 2 years (with symptoms often less severe than MDD), but it does not include the recurrent temper outbursts that are seen in DMDD. Dysthymia also involves more pervasive symptoms of depression (e.g., low energy, low self-esteem) rather than irritability alone.

D. Premenstrual dysphoric disorder (PMDD): PMDD is a severe form of premenstrual syndrome (PMS), characterized by mood swings, irritability, and other physical symptoms that occur in the luteal phase of the menstrual cycle. Since this is a 10-year-old girl, PMDD is unlikely because menstruation is not typically expected at this age.

Summary:

The most likely diagnosis for this patient, based on her persistent irritability and frequent temper outbursts that are grossly out of proportion to the situation, is Disruptive Mood Dysregulation Disorder (DMDD). This condition typically presents in children before the age of 10 and is marked by frequent outbursts and a chronic irritable mood. Other mood disorders, like major depressive disorder or persistent depressive disorder, do not typically present with the same severity of irritability and temper outbursts.

Correct Answer: b) Honey

Honey should be avoided for infants under 1 year of age due to the risk of infant botulism. Honey can contain spores of Clostridium botulinum, which can grow in the infant's intestines and produce a toxin that causes botulism, a life-threatening illness.

Why Other Options are Wrong:

a) Peanuts: Peanuts are commonly avoided due to the potential for an allergic reaction, but they are not directly linked to the risk of botulism in infants. Recent guidelines recommend early introduction of peanuts to reduce the risk of peanut allergies, unless the infant has a known allergy risk.

c) Cow's milk: Cow's milk is generally not recommended as a primary drink until after 1 year of age due to nutritional concerns, but it is not associated with botulism risk.

d) Eggs: Eggs are a common allergen, but there is no direct risk of botulism from eggs. Eggs should be cooked thoroughly to avoid the risk of foodborne illness.

Summary:

The nurse should educate parents to avoid honey until the infant reaches 1 year of age to prevent the risk of infant botulism. Other foods such as peanuts, cow's milk, and eggs may have other considerations, but they are not linked to botulism.

Correct Answer: B. Greater than 3 years exists between breast growth and menarche.

In girls, delayed puberty can also be diagnosed if there is a gap of more than 3 years between the onset of breast development (thelarche) and menarche (the first menstrual period).

This gap is considered abnormal and can suggest underlying issues affecting normal pubertal development, such as hormonal imbalances, nutritional deficiencies, or other health conditions.

Why the Other Options Are Incorrect:

A. Breast development does not occur by age 11 years:

This would be an early indicator of delayed puberty but does not define the overall criteria. Puberty is generally expected to begin between ages 8 and 13, with breast development often beginning around age 10. However, absence of breast development by 11 is not the primary marker for diagnosing delayed puberty.

C. Menstruation does not occur by age 13 years:

Primary amenorrhea (failure to menstruate by age 13) is an important diagnostic consideration but does not define delayed puberty itself. The absence of menstruation by age 13 may be a sign of a different issue, such as hormonal imbalance, but it's not the primary factor for diagnosing delayed puberty.

D. Pubic hair does not grow by age 12 years:

Pubic hair development (pubarche) typically follows breast development and varies widely. While pubic hair development after age 12 can indicate delayed puberty, the timing of breast development is the main factor when diagnosing delayed puberty in girls.

Summary:

A gap of more than 3 years between breast development and menarche is the most reliable diagnostic feature of delayed puberty. If this occurs, it warrants further investigation into the cause of the delay in the full progression of puberty.

Correct Answer: D) Digoxin is less commonly used today but may still play a role in certain congenital heart disease postoperative patients.

 Digoxin's use has declined but remains beneficial in specific situations, such as in single-ventricle patients after the Norwood procedure, to improve cardiac function and reduce mortality before the second stage surgery.

Why Other Options are Wrong:

A) Digoxin is the first-line treatment for neonatal supraventricular tachycardia due to its proven efficacy: 

Digoxin is no longer the first-line treatment for neonatal supraventricular tachycardia due to higher mortality rates compared to propranolol.

B) Digoxin is commonly used as a primary agent for heart failure in children with large left-to-right shunts: 

Digoxin may be used in children with large left-to-right shunts but is not typically the first-line treatment for heart failure today.

C) Digoxin has been shown to increase mortality in single-ventricle patients after the Norwood procedure: Incorrect. Digoxin has been shown to reduce mortality in single-ventricle patients after the Norwood procedure, not increase it.

Summary:

Digoxin's role in pediatric heart failure management has diminished over time, though it can still be valuable in specific conditions, particularly in postoperative congenital heart disease patients, such as those with single-ventricle physiology following the Norwood procedure. It is no longer the front-line treatment for neonatal supraventricular tachycardia due to its higher mortality rate compared to propranolol.

The correct answer is B: Moderate dehydration.

The World Health Organization (WHO) classifies dehydration in children based on the percentage of fluid loss from body weight. The three categories of dehydration according to WHO are:

1. No dehydration: This is when the fluid deficit is less than 5% of the child’s body weight. In this case, the child does not show signs of dehydration.


2. Some dehydration: This occurs when there is a fluid deficit of 5% to 10% of body weight. Symptoms may include dry mouth, thirst, reduced urine output, and slight decrease in skin turgor.


3. Severe dehydration: This is when the fluid deficit exceeds 10% of body weight, leading to more serious symptoms such as sunken eyes, dry mucous membranes, rapid pulse, low blood pressure, and possibly shock.

The "Moderate dehydration" category does not exist in the WHO classification. The term "Some dehydration" is used to describe a fluid deficit between 5% and 10%, which is often interpreted as moderate by some clinicians, but it is not labeled as "moderate" by WHO.

Why the other options are incorrect:

• No dehydration: This is a valid classification used by WHO to describe children who have no signs of dehydration or have a very minimal fluid deficit (less than 5% of body weight).


• Severe dehydration: This is also a valid classification used by WHO for children who experience a significant fluid deficit of more than 10% of body weight, leading to serious dehydration symptoms and possibly shock.

Here is a table that outlines the WHO guidelines for the classification of dehydration in children, based on the parameters mentioned:

Summary:

• No Dehydration: The child is well, alert, and shows no signs of dehydration. Skin pinch returns quickly, and eyes are normal.


• Some Dehydration: The child may appear restless or irritable, with slightly sunken eyes and a slower skin pinch response. They will be thirsty and drink eagerly.


• Severe Dehydration: The child appears lethargic or unconscious, with very sunken eyes. Skin pinch goes back slowly (≥2 seconds), and the child may drink poorly or not be able to drink.

This classification helps healthcare providers assess the degree of dehydration in children and determine the necessary interventions for rehydration.

Summary:

The WHO does not recognize "Moderate dehydration" as an official category. The correct terms are No dehydration, Some dehydration, and Severe dehydration. The key difference is the percentage of body weight lost due to fluid deficit, and the term "Moderate dehydration" is an incorrect interpretation of "Some dehydration," which covers fluid deficits of 5–10%.

Correct Answer: b) The neonate is making a smooth transition to extrauterine life.

An Apgar score between 7 and 10 indicates that the neonate is making a smooth transition to extrauterine life. The Apgar score is a quick assessment tool used to evaluate a newborn's physical condition immediately after birth. A score in this range suggests that the baby is stable, has good respiratory effort, heart rate, muscle tone, reflex response, and color.

Why Other Options are Wrong:

a) The neonate requires immediate resuscitation:

A score below 7 would indicate that the neonate may need further medical attention, possibly including resuscitation, but a score between 7 and 10 means the neonate is already stable and does not require immediate resuscitation.

c) The neonate is at high risk for neurological complications:

A score of 7 to 10 typically indicates a low risk of neurological complications, and a neonate in this range is generally considered stable.

d) The neonate is in critical condition and may not survive:

A score below 7, particularly if sustained beyond 10 minutes, may indicate a higher risk of morbidity and mortality. A score between 7 and 10 usually suggests the neonate is not in critical condition.

Summary:

An Apgar score between 7 and 10 suggests that the neonate is stable and making a successful transition to life outside the womb. Scores below 7, especially if they persist for a prolonged period, are associated with increased risks of complications, and the baby may require more intensive medical interventions.

Correct Answer: a) 15 to 60 mg/kg IV for an active seizure, followed by 50 to 100 mg orally once a day

Vitamin B6 in high doses has been shown to reduce seizures in certain pediatric conditions. The recommended dose for an active seizure is 15 to 60 mg/kg IV (intravenously), followed by a maintenance dose of 50 to 100 mg orally once a day. This dose may go up to 100 mg IV initially, with the maximum daily oral maintenance dose being 500 mg. Vitamin B6 may be used to treat seizures, particularly in cases of pyridoxine-dependent epilepsy or other conditions responsive to high-dose B6 therapy.

Why Other Options are Wrong:

b) 50 to 100 mg IV for an active seizure, followed by 100 to 200 mg orally twice a day:

This is incorrect as the recommended dose for active seizures is 15 to 60 mg/kg IV, not 50 to 100 mg IV. Also, the oral maintenance dose should be 50 to 100 mg once a day, not 100 to 200 mg twice a day.

c) 15 to 60 mg/kg orally for an active seizure, followed by 100 to 200 mg IV once a day:

The correct route for the initial treatment of seizures is IV, not oral. Oral maintenance is after the IV dose, with a dose of 50 to 100 mg once a day.

d) 5 to 10 mg/kg IV for an active seizure, followed by 25 to 50 mg orally once a day:

This dose is too low for the initial treatment of active seizures. The recommended IV dose for an active seizure is much higher at 15 to 60 mg/kg, and the maintenance dose should be in the 50 to 100 mg range, not just 25 to 50 mg.

Summary:

The appropriate dose of Vitamin B6 for managing seizures in children involves an IV dose of 15 to 60 mg/kg during an active seizure, followed by an oral maintenance dose of 50 to 100 mg once daily. The maximum dose of oral Vitamin B6 should be 500 mg per day. This approach is primarily used in cases like pyridoxine-dependent epilepsy.

Correct Answer: Increased sleepiness

Increased sleepiness or lethargy is a common early sign of elevated ICP in infants. Other indicators of increased ICP in infants may include irritability, bulging fontanels, high-pitched crying, and changes in feeding patterns.

Why Other Options are Wrong

Brisk pupillary reaction to light:

A normal pupillary response to light suggests that ICP is not elevated.

Tachycardia:

Although tachycardia can occur in response to various conditions, it is not a specific sign of increased ICP.

Depressed fontanels:

Depressed fontanels are more commonly a sign of dehydration or a decrease in intracranial pressure, not increased ICP.

Thus, increased sleepiness is the key finding to monitor for increased ICP in this case.

Correct Answer: c) Moro reflex

The Moro reflex is a startle response elicited by pulling the neonate's arms slightly off the bed and releasing suddenly. The neonate extends the arms with fingers extended, flexes the hips, and cries. This reflex is an important marker of a normal peripheral nervous system and is typically present for several months after birth.

Why Other Options are Wrong:

a) Grasp reflex:

While the grasp reflex is also important, it is not mentioned in this context, which specifically asks about the Moro, suck, and rooting reflexes as indicators of the peripheral nervous system.

b) Babinski reflex:

This reflex is important in the assessment of adults and older children but is not one of the neonatal reflexes listed in this context.

d) Tonic neck reflex:

The tonic neck reflex is an important reflex, but it is not specifically listed in the description of neonatal reflexes provided in this case.

Summary:

The Moro reflex is a key reflex in neonates, providing important insight into the normal function of their peripheral nervous system. It typically persists for several months after birth and is part of a broader neurological assessment, including the suck and rooting reflexes.