RNC-LRN study materials
RNC-LRN study resources

RNC-LRN cheat sheet

RNC-LRN · Keep the key ideas within reach.

Quick reference

Assessment and Physiologic Adaptation of the Newborn

  • Apgar is scored at 1 and 5 minutes using appearance, pulse, grimace, activity, and respiration; 7-10 is generally reassuring.

  • Apgar heart rate: >100 bpm = 2 points, <100 bpm = 1 point, absent = 0 points.

  • Typical term newborn: heart rate 110-160 bpm, respiratory rate 30-60/min, axillary temperature 36.5-37.5 C.

  • First period of reactivity lasts about 30 minutes after birth; a second period occurs 2-8 hours after birth.

  • Expected weight loss is up to 7-10% of birth weight by days 3-5, with regain by 10-14 days.

  • Newborn hemoglobin is about 14-24 g/dL and venous hematocrit 45-65%; polycythemia is venous hematocrit >65%.

  • Blood glucose screening is indicated for at-risk infants; values below the protocol threshold require feeding or IV dextrose evaluation.

  • Ductus arteriosus functional closure occurs within 24-72 hours after birth; foramen ovale and ductus venosus close functionally after birth.

Quick reference

Antepartum, Intrapartum, and Maternal-Fetal Factors Affecting the Newborn

  • Maternal diabetes increases risk of macrosomia, shoulder dystocia, neonatal hypoglycemia, polycythemia, and respiratory distress syndrome.

  • Preeclampsia is associated with intrauterine growth restriction, preterm birth, placental abruption, and oligohydramnios.

  • Maternal fever >=38 C plus uterine tenderness or foul fluid suggests chorioamnionitis and increases neonatal sepsis risk.

  • Group B streptococcus colonization is treated with intrapartum penicillin; rupture of membranes >=18 hours increases neonatal sepsis risk.

  • Meconium-stained amniotic fluid raises risk of meconium aspiration syndrome; nonvigorous infants need airway assessment.

  • Fetal heart baseline is 110-160 bpm; moderate variability is 6-25 bpm; accelerations after 32 weeks are >=15 bpm for >=15 seconds.

  • Late decelerations suggest uteroplacental insufficiency; variable decelerations suggest umbilical cord compression.

  • Maternal magnesium sulfate can cause neonatal hypotonia, poor feeding, and respiratory depression.

Quick reference

General Care and Management of the Newborn

  • Heat loss occurs by evaporation, conduction, convection, and radiation; a neutral thermal environment minimizes oxygen consumption.

  • Axillary temperature is checked routinely; hypothermia is <36.5 C and hyperthermia is >37.5 C.

  • Bathing is performed after temperature is stable; routine cord care keeps the cord clean and dry.

  • Vitamin K 0.5-1 mg is given intramuscularly once after birth to prevent hemorrhagic disease of the newborn.

  • Erythromycin 0.5% ophthalmic ointment is applied to both eyes once after birth for gonococcal ophthalmia prophylaxis.

  • Newborn metabolic screening is collected after 24 hours of age and before discharge; repeat if collected before 24 hours per protocol.

  • Hearing screening is completed before discharge; circumcision requires consent, vitamin K, and pain control.

  • Use two patient identifiers before procedures and medications; place infants supine on a firm surface for sleep.

Quick reference

Nutrition and Feeding

  • Colostrum volume is small, about 5-10 mL on day 1; newborn stomach capacity is about 5-10 mL on day 1 and 45-60 mL by week 1.

  • Term infants feed 8-12 times per 24 hours; early cues include rooting, hand-to-mouth movement, and sucking.

  • Weight loss >10% or fewer than 6 wet diapers by day 5 warrants feeding assessment.

  • Standard infant formula is 20 kcal/oz; formula should not be diluted or concentrated, and water is not given to newborns.

  • Exclusively breastfed infants need 400 IU vitamin D daily; formula-fed infants need supplementation if intake is <1 L/day.

  • Fresh breast milk storage: about 4 hours at room temperature, 4 days in the refrigerator, and 6 months in the freezer.

  • Paced bottle feeding uses a semi-upright position, horizontal nipple, and pauses to follow infant cues.

  • Frequent effective feeding supports bilirubin excretion and reduces breastfeeding jaundice.

Quick reference

Common Complications and Conditions in the Low-Risk Newborn

  • Jaundice appearing within the first 24 hours is pathologic and requires bilirubin measurement and evaluation for hemolysis or infection.

  • Phototherapy thresholds use hour-specific bilirubin nomograms; exchange transfusion is reserved for severe hyperbilirubinemia.

  • Breastfeeding jaundice results from insufficient intake in the first week; breast milk jaundice appears after week 1 and is usually benign.

  • Hypoglycemia signs include jitteriness, lethargy, poor feeding, apnea, and seizures; confirm with blood glucose and treat per protocol.

  • Sepsis risk rises with group B streptococcus colonization, maternal fever, and rupture of membranes >=18 hours.

  • Respiratory distress signs: respiratory rate >60/min, grunting, nasal flaring, retractions, and cyanosis.

  • Transient tachypnea of the newborn usually resolves within 24-72 hours and is common after cesarean birth.

  • Bilious emesis in a newborn is a red flag for intestinal obstruction and requires urgent evaluation.

Quick reference

Family-Centered Care, Education, and Discharge Planning

  • Rooming-in supports breastfeeding, cue-based feeding, bonding, and parental confidence.

  • Discharge criteria include stable vital signs, adequate feeding, voiding and stooling, completed screening, and planned follow-up.

  • Term newborns are seen 48-72 hours after discharge; earlier follow-up is needed for jaundice, weight loss, or feeding problems.

  • Safe sleep: supine, firm surface, no soft bedding, and room-sharing without bed-sharing.

  • Car seat safety: rear-facing seat, snug five-point harness; preterm infants may need a car seat challenge before discharge.

  • Teach-back asks families to explain or demonstrate care in their own words to confirm understanding.

  • Professional interpreters are used for families with limited English proficiency; family-centered care includes parents in rounds and care decisions.

Quick reference

Professional Practice, Patient Safety, and Quality Improvement

  • SBAR handoff: Situation, Background, Assessment, Recommendation.

  • Two patient identifiers, such as name and date of birth, are verified before medications, procedures, or transfusion.

  • PDSA is a rapid-cycle quality improvement method: Plan, Do, Study, Act.

  • Incident reporting is nonpunitive; sentinel events trigger root cause analysis.

  • Handoff includes medications, allergies, lines, pending tests, and recent changes.

  • Scope of practice is defined by the state nurse practice act and hospital policy.

  • Just culture separates human error from reckless behavior while maintaining accountability for unsafe choices.

  • Evidence-based practice uses current clinical guidelines and research rather than tradition alone.