Which should the nurse consider when preparing a school-age child and the family for heart surgery?

Choice A reason: This is not a good choice. IV fluid bolus of 10 ml/kg is not enough to restore the circulating volume and perfusion in a child with hypovolemic shock. The recommended initial fluid bolus for pediatric hypovolemic shock is 20 ml/kg of isotonic crystalloid solution.

Choice B reason: This is the correct choice. Oxygen, IV fluid bolus of 20 ml/kg, and medications to support cardiac function are the appropriate interventions for a child with hypovolemic shock. Oxygen is given to improve oxygenation and prevent tissue hypoxia. IV fluid bolus of 20 ml/kg is given to replace the lost fluid and blood volume and improve the blood pressure and cardiac output. Medications to support cardiac function may include inotropes, vasopressors, or antiarrhythmics, depending on the child's condition and the cause of the shock.

Choice C reason: This is not a good choice. IV at 2x maintenance is not sufficient to correct the hypovolemia and shock in a child. Maintenance fluids are given to prevent dehydration and electrolyte imbalance, but they are not enough to restore the hemodynamic stability and perfusion in a child with shock. A fluid bolus is needed to rapidly increase the intravascular volume and improve the vital signs.

Choice D reason: This is not a good choice. Oxygen and medication to support cardiac function are important, but they are not enough to reverse the hypovolemic shock in a child. A fluid bolus is the first and most essential intervention to correct the hypovolemia and shock in a child. Giving medication before fluid bolus may worsen the shock and cause adverse effects.

Choice A reason: This statement is incorrect, as Tanner staging is not based on chronological age, but on the physical development of the child. Children may enter and progress through puberty at different ages, depending on their genetic, environmental, and nutritional factors.

Choice B reason: This statement is incorrect, as Tanner staging is not based on the sexual behavior of the child, but on the appearance of the external genitalia, breasts, and pubic hair. Sexual behavior is influenced by many factors, such as social, cultural, and psychological factors, and does not necessarily correlate with the stage of puberty.

Choice C reason: This statement is incorrect, as Tanner staging is not based on the increase in height and weight, but on the maturation of the reproductive organs and secondary sex characteristics. Height and weight are affected by many factors, such as nutrition, health, and genetics, and do not necessarily reflect the stage of puberty.

Choice D reason: This statement is correct, as Tanner staging is based on the predictable stages of puberty that are based on primary and secondary sexual characteristics. Primary sexual characteristics are the development of the internal and external reproductive organs, such as the ovaries, testes, uterus, penis, and vagina. Secondary sexual characteristics are the changes that occur in other parts of the body, such as the breasts, pubic hair, axillary hair, voice, and body shape.