Final answer:
The recommended size of the urinary catheter for a 3-year-old child is 8 to 10 Fr.
Step-by-step explanation:
The recommended size of the urinary catheter that can be used in a 3-year-old child is 8 to 10 Fr.
When choosing a catheter size, it is important to consider the age and size of the child. A 3-year-old child typically has a ureter diameter of about 3 to 4 mm, which corresponds to a catheter size of 8 to 10 Fr.
Using a catheter within this size range ensures that it is appropriately sized for the child's anatomy, allowing for effective and safe urine drainage.