👤 By the CinnaRN Clinical Content Team🕐 Updated 2026-08-23🏷️ Health Promotion & Maintenance🔖 Free to read, print, and share
Also known as: FTT · poor growth · weight faltering · growth failure in infants
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Use this quick-reference guide to spot, treat, and prevent Failure to Thrive on the NCLEX. Keep it handy during review and on exam day!
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📒 The 1-minute cheat sheet
📌 Def
Inadequate growth for age
Drop ≥ 2 percentile lines
⚠️ Causes
Organic: illness, malabsorption
Nonorganic: neglect, poor bonding
✅ Do
High-cal feeds, structured meals
Daily weights, same scale/time
Consistent caregiver, calm feeds
🎓 Teach
Eye contact, no distractions
Model feeding, assess bonding
📚 Failure to Thrive — full study notes
The cheat sheet above is your quick recall card. These notes go deeper — what it is, what to do first, what must be reported, and what to teach.
Failure to thrive is inadequate physical growth, classically weight below the 5th percentile or crossing two major percentile lines downward. Causes are organic (a medical condition), nonorganic (psychosocial/feeding issues), or mixed. Key principle: most cases are nonorganic and relate to feeding technique, calorie intake, or the caregiver-infant relationship.
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Key points
Understand these first
Weight is affected first, then height, then head circumference as malnutrition worsens.
Nonorganic FTT is linked to feeding problems, poverty, neglect, maternal depression, or disturbed bonding.
Organic causes include malabsorption, congenital heart disease, GERD, cleft palate, and metabolic disorders.
A standardized weight gain during structured feeding in the hospital points toward a nonorganic cause.
Affected infants may be apathetic, avoid eye contact, be difficult to console, or show developmental delays.
Catch-up growth requires extra calories, often 150 percent or more of normal daily requirements.
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Nursing priorities
What to do, in order
Obtain accurate serial weights on the same scale, at the same time, with the infant undressed, and plot on growth charts.
Document a detailed feeding history, intake, and direct observation of a feeding session.
Provide a calm, unhurried, consistent feeding environment and caregiver during meals.
Calculate and deliver high-calorie nutrition as prescribed and record intake meticulously.
Observe and support caregiver-infant interaction and model responsive feeding.
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Red flags — report now
Escalate immediately
Signs of severe dehydration or malnutrition (lethargy, sunken fontanel, poor turgor) require prompt intervention.
Suspected neglect or abuse contributing to FTT is a mandated report.
Refeeding too aggressively can cause refeeding syndrome (low phosphate, potassium, magnesium); advance calories carefully.
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Labs & values
Numbers to know
CBC (screen for anemia), normal hemoglobin 11-13 g/dL in young children
Electrolytes, including phosphate, potassium, magnesium (watch for refeeding syndrome)
Prealbumin/albumin as nutritional markers; albumin normal ~3.5-5 g/dL
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Patient teaching
What patients must know
Feed on a consistent schedule, hold the infant during feeds, and minimize distractions.
Use prescribed high-calorie formula or fortification and avoid filling up on water or juice.
Recognize and respond promptly to the infant's hunger and satiety cues.
Keep all follow-up weight checks and feeding-support appointments.
❓ Failure to Thrive: NCLEX FAQs
What are the priority nursing interventions for Failure to Thrive?
Obtain accurate serial weights on the same scale, at the same time, with the infant undressed, and plot on growth charts. Document a detailed feeding history, intake, and direct observation of a feeding session. Provide a calm, unhurried, consistent feeding environment and caregiver during meals. Calculate and deliver high-calorie nutrition as prescribed and record intake meticulously.
What are the warning signs of Failure to Thrive a nurse must report?
Signs of severe dehydration or malnutrition (lethargy, sunken fontanel, poor turgor) require prompt intervention. Suspected neglect or abuse contributing to FTT is a mandated report. Refeeding too aggressively can cause refeeding syndrome (low phosphate, potassium, magnesium); advance calories carefully.
What do I need to know about Failure to Thrive for the NCLEX?
Weight is affected first, then height, then head circumference as malnutrition worsens. Nonorganic FTT is linked to feeding problems, poverty, neglect, maternal depression, or disturbed bonding. Organic causes include malabsorption, congenital heart disease, GERD, cleft palate, and metabolic disorders. A standardized weight gain during structured feeding in the hospital points toward a nonorganic cause.
What patient teaching is important for Failure to Thrive?
Feed on a consistent schedule, hold the infant during feeds, and minimize distractions. Use prescribed high-calorie formula or fortification and avoid filling up on water or juice. Recognize and respond promptly to the infant's hunger and satiety cues. Keep all follow-up weight checks and feeding-support appointments.
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Quick Tip
Weight is affected first, then height, then head circumference as malnutrition worsens.