An infant is experiencing dyspnea related to patent ductus arteriosus (PDA). The nurse understands dyspnea occurs because blood

A. Obtaining a throat culture and B. visualizing the epiglottis with a tongue depressor are not safe actions for the nurse to perform without appropriate medical equipment and expertise. These actions can trigger a sudden airway obstruction in a child with epiglottitis. The priority is to ensure airway patency and seek immediate medical assistance.

C. Place the child in an upright position.

Suspected epiglottitis is a medical emergency that can result in rapid airway obstruction. Placing the child in an upright position helps improve airflow by allowing the throat to open and reduces the risk of complete airway obstruction. It's important not to perform invasive procedures (such as throat culture or visualization of the epiglottis) without proper medical equipment and expertise, as these actions can lead to worsening airway obstruction.

D. Transporting the child to radiology for a throat x-ray is not appropriate in this situation, as it may delay necessary interventions to secure the airway.

Option A is incorrect because Tanner staging is not solely based on developmental achievement according to age. It assesses physical development irrespective of age.

Option B is incorrect because it is not based on the color of pigmentation on the scrotum but rather on multiple physical characteristics.

Option C. Based on the development of pubic hair in girls.

The Tanner staging system, also known as sexual maturity rating or sexual maturity scale, is a system used to assess the sexual development of children and adolescents based on physical characteristics, primarily focusing on secondary sexual characteristics. It is used to assess the stage of puberty in both boys and girls. In the case of girls, it includes the development of pubic hair, breast development, and other changes like the growth of the areola.

Option D is incorrect because it doesn't solely focus on staged voice changes in males. The Tanner staging system includes a range of characteristics, including voice changes, genital development, and pubic hair growth, to assess sexual maturity in both males and females.