A 15-year-old patient is to receive antihemophilic factor (Factor VIll) replacement therapy. He asks the nurse, "Why does this always happen to me? How come my sisters don't have hemophilia?”. The nurse's response should be based on the understanding that hemophilia is characteristic of which type of hereditary disorder?

Choice A rationale:

The statement "My child will likely experience long-term complications, such as difficulty eating”. indicates a misunderstanding about the postoperative care following a pyloromyotomy. Pyloromyotomy is a surgical procedure to treat pyloric stenosis, and the goal is to relieve the obstruction causing feeding difficulties. Long-term complications such as difficulty eating are not expected outcomes. The rationale behind this is that pyloromyotomy aims to improve feeding and resolve the obstruction, leading to improved eating habits.

Choice B rationale:

The statement "A few hours after surgery, my child will receive small, frequent feedings of Pedialyte”. is correct. After a pyloromyotomy, it's important to gradually reintroduce feeding. This statement demonstrates the caregiver's understanding of the postoperative feeding plan, which typically involves starting with clear fluids like Pedialyte.

Choice C rationale:

The statement "My child will most likely have a small incision from the laparoscopic surgery”. is incorrect. Pyloromyotomy is usually performed with a small incision, but it is not typically done laparoscopically. Instead, an open surgical approach is more common due to the nature of the procedure. Laparoscopy is not the usual method for this surgery.

Choice D rationale:

The statement "I can breastfeed my child if the Pedialyte feedings are tolerated after 24 hours”. is incorrect. After a pyloromyotomy, it's essential to follow a gradual feeding progression under medical guidance. Breastfeeding can be reintroduced gradually as the child tolerates oral feedings, but it's not solely dependent on 24 hours of Pedialyte tolerance.

Choice A rationale:

X-linked dominant disorders are characterized by a mutation on the X chromosome that results in the expression of the trait in both males and females. Hemophilia, however, is more commonly associated with males, which is not consistent with an X-linked dominant pattern.

Choice B rationale:

Autosomal recessive disorders require the inheritance of two mutated alleles, one from each parent, to express the trait. Hemophilia does not follow this pattern, as the patient's sisters do not have the condition despite having affected parents.

Choice C rationale:

Autosomal dominant disorders only require the inheritance of one mutated allele from an affected parent to express the trait. Hemophilia does not align with an autosomal dominant pattern, as the patient's sisters would likely be affected if it were.

Choice D rationale:

Hemophilia is a classic example of an X-linked recessive disorder. The gene responsible for producing clotting factor is located on the X chromosome, and males have only one X chromosome, making them more susceptible to the disorder. Females, with two X chromosomes, usually act as carriers unless both X chromosomes carry the mutation.