Urinalysis and Body Fluids 6th Edition by Majorie DiLorenzo, Susan Strasinger

Exercise 43

An 8–month-old boy is admitted to the pediatric unit with a general diagnosis of failure to thrive. The parents have observed slowness in the infant’s development of motor skills. They also mention the occasional appearance of a substance resembling orange sand in the child’s diapers. Urinalysis results are as follows:

Microscopic:

Many uric acid crystals

a. Is the urine pH consistent with the appearance of uric acid crystals?

b. Is there any correlation between the urinalysis results and the substance observed in the child’s diapers?

Explain your answer.

c. What disorder do the patient’s history and the urinalysis results indicate?

d. Is the fact that this is a male patient of any significance? Explain your answer.

e. Name the enzyme that is missing.

Step 1 of 5

a.

, the urine pH is reliable with the appearance of uric acid crystals.