Which factor is important to include in the teaching plan for parents of a child with Legg- Calve-Perthes disease?

The statement that best describes Tanner staging is option B. Tanner staging is a system used
to classify and assess the progression of puberty based on the development of both primary
and secondary sexual characteristics. It provides a framework for evaluating the physical
changes that occur during puberty, such as breast development in females, testicular
enlargement in males, pubic hair growth, and other secondary sexual characteristics. The
Tanner staging system includes several stages that represent the sequential progression of
puberty in individuals.
staging of puberty based on the initiation of primary sexual characteristics in (option A) is not
correct because it, does not encompass the full scope of Tanner staging, as it does not
consider the progression of secondary sexual characteristics.
staging of puberty based on the initiation of menarche (the onset of menstruation) and
nocturnal emissions, in (option C) is not correct. While menarche and nocturnal emissions are
significant events that occur during puberty, they do not encompass the entire Tanner staging
system, which involves a broader range of physical changes.
predictable stages of puberty based on chronologic age, in (option D) is not correct. Tanner
staging is based on the progression of physical changes and sexual maturation, rather than
being solely determined by chronological age. Puberty can vary in onset and duration among
individuals, making chronological age an unreliable indicator of pubertal development.

The anatomy of the urinary tract can influence the susceptibility to urinary tract infections (UTIs). In the case of young girls, their urethra is shorter compared to adult females, which increases the likelihood of bacteria reaching the bladder. The shorter urethra provides a shorter distance for bacteria to travel from the outside of the body to the bladder, making it easier for bacteria to enter and cause an infection.

Prostatic secretions in males in (option A) is incorrect because they are not directly related to the increased susceptibility to UTIs. Prostatic secretions can, however, contribute to conditions like prostatitis, which is an inflammation of the prostate gland that can be associated with urinary symptoms and sometimes bacterial infections.

Frequent emptying of the bladder in (option C) is incorrect because it is generally considered a healthy practice as it helps to flush out any potential bacteria in the urinary tract. It does not predispose the urinary tract to infection.

Increased fluid intake in (option D) is incorrect because it is generally encouraged to maintain proper hydration and urinary tract health. It can help to flush out bacteria from the urinary system, reducing the risk of infection.

While these factors may have implications for urinary tract health, the specific factor that predisposes the urinary tract to infection, particularly in young girls, is the short urethra (B).