What measurements are taken for patients under 2 years old at a well child check?

The appropriate measurements for patients under 2 years old at a well-child check are weight, length, and head circumference. This is because these specific parameters are critical for assessing the growth and development of infants and toddlers.

Weight is essential to evaluate proper growth and nutritional status; it helps identify whether a child is gaining weight appropriately. Length, rather than height, is measured in this age group since children are typically measured while lying down. Taking head circumference is important as it provides information about brain growth and can help detect potential issues such as developmental delays or abnormalities.

The other choices include measurements that may be relevant for older children or different contexts but are not standard for infants under 2 years. Blood pressure is generally not routinely measured in this age group, and BMI becomes a useful tool only as children grow older and develop more predictable patterns of growth that can be related to height and weight. Vision checks are also typically conducted later in childhood when the child is better able to participate in the assessment.