# Stage 3 — Prioritize hypotheses. At Baby J's six-month well-child visit, her weight has followed the 15th percentile and her length the 25th percentile since 2 months of age, and no loss of skills is reported. She knows familiar people, laughs, takes turns making sounds, reaches for toys, brings objects to her mouth, and rolls both ways during supervised floor play; she sits only when propped or supported. Her conjunctivae and palms are pink. She receives human milk plus iron-fortified cereal and varied pureed foods. The mother places her on her stomach at the start of nighttime sleep, and a loose blanket and the family cat are sometimes in the crib. The parents turned the car seat forward-facing because her legs looked crowded, use a mobile walker beside an ungated staircase with a loose railing, and the father plans to replace one human-milk feeding with whole cow milk. Complete the diagram by selecting the condition the client is most likely experiencing, 2 actions the nurse should take to address that condition, and 2 parameters the nurse should monitor to assess the client's progress. > source: MyMerci (mymerci.kr) > url: https://mymerci.kr/pages/nclex_q.php?qn_id=617399&lang=en > language: en > subject: Health Promotion/Disease Prevention > category: HPM ## Question Stage 3 — Prioritize hypotheses. At Baby J's six-month well-child visit, her weight has followed the 15th percentile and her length the 25th percentile since 2 months of age, and no loss of skills is reported. She knows familiar people, laughs, takes turns making sounds, reaches for toys, brings objects to her mouth, and rolls both ways during supervised floor play; she sits only when propped or supported. Her conjunctivae and palms are pink. She receives human milk plus iron-fortified cereal and varied pureed foods. The mother places her on her stomach at the start of nighttime sleep, and a loose blanket and the family cat are sometimes in the crib. The parents turned the car seat forward-facing because her legs looked crowded, use a mobile walker beside an ungated staircase with a loose railing, and the father plans to replace one human-milk feeding with whole cow milk. Complete the diagram by selecting the condition the client is most likely experiencing, 2 actions the nurse should take to address that condition, and 2 parameters the nurse should monitor to assess the client's progress. Condition Select 1 Gross motor developmental delay Injury and sleep-related death risk Inadequate weight gain on human milk Iron-deficiency anemia Actions to take Select 2 Refer her to early intervention for a motor evaluation Teach supine placement in an empty crib every sleep Allow the walker only when an adult stays nearby Suggest a sleep wedge to keep her on her back Turn the car seat rear-facing until the seat limit Parameters to monitor Select 2 Weight-for-length percentile Hemoglobin and serum ferritin levels Sleep position and crib contents Developmental screening score Car-seat direction at follow-up ## Explanation Weight and length that track the same percentiles, age-typical skills (rolling both ways, sitting with support), pink conjunctivae, and iron-fortified foods argue against delay, poor weight gain, and iron deficiency, so the priority is injury and sleep-related death risk. The nurse teaches supine placement in an empty crib for every sleep and a return to rear-facing travel until the seat's limit. Start-of-sleep position with crib contents and car-seat direction at follow-up show whether the practices changed. ## In-depth explanation Quick answer Condition: injury and sleep-related death risk. Actions: teach supine placement in an empty crib every sleep, and turn the car seat rear-facing until the seat limit. Monitor: sleep position and crib contents, and car-seat direction at follow-up. Why this is correct Baby J is growing and developing as expected; the danger is in the home practices. Prone placement and soft objects (blanket, cat) raise the risk of sudden unexpected infant death; she should be placed supine every sleep, and because she rolls both ways she may stay in a position she chooses. Rear-facing seats protect the head and neck; crowded legs are not a reason to turn, the seat's height or weight limit is. The measure of success is behavior: what is in the crib, how she is placed, and which way the seat faces at the next contact. Easy analogy or mental picture Think of the crib as a clean countertop: nothing on it but the baby, placed on her back, every time. Memory hook Back to sleep, bare crib, rear-facing to the limit. NCLEX decision rule When a well child's growth and development are on track, prioritize the hazard that can cause death or serious injury soonest, and evaluate teaching by observed change in the practice, not by agreement. Why the other choices are wrong Gross motor delay is tempting because she does not yet sit alone, but independent sitting is usually achieved between 6 and 9 months and rolling both ways is on track, so an early-intervention referral and a screening score follow a problem she does not have. Poor weight gain is tempting because her weight is at the 15th percentile, but steady tracking along one percentile is normal growth, so weight-for-length is not the progress marker. Iron deficiency is tempting because of human milk and the cow-milk plan, but she eats iron-fortified cereal, has pink conjunctivae, and routine CBC and ferritin screening is planned at 9 to 12 months. Sleep wedges and positioners are not recommended and add a suffocation hazard. Mobile walkers cause falls down stairs even with an adult nearby and should be removed rather than supervised; the walker and the cow-milk plan also need teaching, but the two chosen actions address the hazards most likely to cause death. References 1NICHD — Safe to Sleep CampaignBack to sleep for every sleep in a bare crib without soft objects 2NHTSA — Car Seats and Booster SeatsKeep children rear-facing until they reach the seat's rear-facing height or weight limit ## Clinical scenario Case update Six-month visit: weight and length track steady percentiles, she rolls both ways but sits only with support, and the home has prone sleep, a cluttered crib, early forward-facing travel, a walker near stairs, and planned cow milk. ## Key concepts - **Sudden unexpected infant death** — Unexplained death of an infant during sleep; risk rises with prone placement and soft bedding. - **Rear-facing car seat** — A seat that faces backward to support the head, neck, and spine; used until the seat's rear-facing height or weight limit. - **Anticipatory guidance** — Teaching that prepares parents for the next developmental stage and its hazards. ## Related questions - [A 6-month-old infant is brought to the well-child clinic for routine vaccinations. 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