Infant Safety, Well-Child Care and Immunizations

Physical Growth Monitoring and Essential Newborn Screenings

Routine well-child visits provide critical opportunities for the practical nurse to collect physical growth data and perform focused observations. Within the LPN/VN scope of practice, the nurse measures the infant's length, weight, and head circumference at scheduled well-child visits and plots these growth measurements on standardized growth charts. To measure head circumference accurately, the nurse places the measuring tape around the infant's head just above the eyebrows and around the prominent part of the occiput. Healthy infants follow predictable growth trends: birth weight typically doubles by approximately 5 to 6 months of age and typically triples by 12 months of age, while birth length typically increases by approximately 50 percent by 12 months of age. The LPN/VN reports sudden drops or sharp increases across percentiles on the growth chart to the RN, and reinforces parental teaching regarding expected infant developmental milestones and scheduled well-child visits.

Physical data collection includes careful palpation of the cranial fontanels. The posterior fontanel of an infant typically closes between 2 and 3 months of age, whereas the larger anterior fontanel typically closes between 12 and 18 months of age. Fontanel characteristics offer crucial clinical information regarding hydration and neurological status. A sunken anterior fontanel may suggest dehydration; the LPN/VN should check for other signs of fluid loss and report concerning findings to the RN. Conversely, a bulging, tense anterior fontanel observed in a quiet, non-crying infant can indicate increased intracranial pressure, requiring prompt communication with the RN.

Early preventive care also encompasses critical laboratory and physiological screenings. Newborn bloodspot screening is usually collected by heel stick at 24 to 48 hours of age to test for congenital disorders such as phenylketonuria (PKU), galactosemia, and congenital hypothyroidism; this collection should not be delayed solely because the infant has not received protein feedings. When obtaining a heel-stick blood specimen, the puncture must be made on the outer medial or outer lateral plantar surface of the heel. Puncturing the center of an infant's heel must be avoided to prevent osteomyelitis or injury to the calcaneus bone. In addition, universal newborn hearing screening should be completed prior to discharge from the birthing facility to identify congenital hearing deficits early, and pulse oximetry screening for critical congenital heart disease is performed on the right hand and either foot at or after 24 hours of age (or as late as possible before discharge if discharge occurs earlier). The LPN/VN also assists in assessing lead-exposure risk at well-child visits, recognizing that blood lead testing at 12 and 24 months is required for Medicaid-enrolled children and performed for other children based on state or local requirements and identified risk. The LPN/VN promptly reports abnormal screening results to the RN for provider notification and timely follow-up.