Correct Answer: B

Rationale: The most appropriate nursing diagnosis for the 18-month-old child presenting with fever, nasal flaring, intercostal retractions, and a respiratory rate of 50 bpm is 'Ineffective breathing pattern.' These symptoms collectively indicate respiratory distress, which aligns with the nursing diagnosis of ineffective breathing pattern. Nasal flaring, intercostal retractions, and an increased respiratory rate are signs of respiratory distress in pediatric patients, suggesting the need for immediate intervention to address the underlying breathing difficulties.

Correct Answer: B

Rationale: Bloody diarrhea is not typically classified as a clinical type of diarrhea. The clinical types of diarrhea commonly include acute, persistent, and secretory diarrhea, which are characterized by different mechanisms and durations. Bloody diarrhea usually indicates the presence of blood in the stool, which can be a sign of various underlying conditions but is not a specific clinical type of diarrhea.

Correct Answer: C

Rationale: When managing a pediatric patient with asthma, the nurse needs to be vigilant about potential complications. While cor pulmonale, respiratory arrest, and respiratory failure are known complications of asthma, respiratory distress is not typically considered a direct complication. Respiratory distress is more of a symptom or a sign of worsening asthma, indicating the need for immediate intervention to prevent progression to more severe complications.

Correct Answer: A

Rationale: Educating parents about avoiding triggers is a crucial part of managing asthma in children to prevent future asthma attacks. By identifying and minimizing exposure to triggers, parents can help reduce the risk of asthma exacerbations and improve the child's overall quality of life.

Correct Answer: D

Rationale: Coryza, also known as the common cold, primarily affects the upper respiratory tract and is not typically associated with lower respiratory tract infections. Pneumonia, asthma, and bronchiolitis are conditions that can manifest as lower respiratory tract infections.