Newborn Assessment and Age Calculations

What are the primary objectives of a newborn assessment?

- Understand APGAR scoring

- Classify birthweight and gestational age

- Learn age terminology and calculations

- Differentiate between preterm and full-term development

What are the five signs assessed in an APGAR score?

- Color (Appearance)

- Heart Rate (Pulse)

- Reflex irritability (Grimace)

- Muscle Tone (Activity)

- Respiratory Effort

When is the APGAR score typically recorded after birth?

- At 1 minute

- At 5 minutes

When should the APGAR score be reported at 10, 15, and 20 minutes?

- Only if the score is less than 7

What does an APGAR score of 7 to 10 indicate?

- Normal newborn status

What does an APGAR score of 4 to 6 indicate?

- Moderately abnormal status

What does an APGAR score of 0 to 3 indicate?

- Critical low status

What is the primary clinical purpose of the APGAR score?

- To determine the status of the infant

- To identify whether immediate medical care is needed (not for prediction)

How is the Color (Appearance) category scored in APGAR?

- 0 points: Blue, pale

- 1 point: Body pink, extremities blue

- 2 points: Entirely pink

How is the Heart Rate (Pulse) category scored in APGAR?

- 0 points: Absent

- 1 point: Below 100

- 2 points: Over 100

How is the Reflex Irritability (Grimace) category scored in APGAR?

- 0 points: No response

- 1 point: Grimace

- 2 points: Grimace, coughing, sneezing, or crying

How is the Muscle Tone (Activity) category scored in APGAR?

- 0 points: Flaccid, limp

- 1 point: Weak, inactive

- 2 points: Strong, active

How is the Respiratory Effort category scored in APGAR?

- 0 points: Absent

- 1 point: Irregular, slow

- 2 points: Good, crying

What weight threshold defines High Birth Weight?

- Greater than 4000 g (8.8 lb)

What weight threshold defines Low Birth Weight?

- Less than 2500 g (5.5 lb)

What weight threshold defines Very Low Birth Weight?

- Less than 1500 g (3.3 lb)

What weight threshold defines Extremely Low Birth Weight?

- Less than 1000 g (2.2 lb)

What growth measures are used to classify a baby relative to gestational age?

- Weight

- Length

- Head circumference

What is Appropriate for Gestational Age (AGA)?

- Growth measures falling between the 10th and 90th percentiles

What is Small for Gestational Age (SGA) and its common associations?

- Growth measures below the 10th percentile

- Associated with smoking, malnutrition, and drug use

What is Large for Gestational Age (LGA) and its common associations?

- Growth measures above the 90th percentile

- Associated with gestational diabetes and post-term infants

How is Preterm gestational age defined?

- Less than 37 weeks GA

How is Early Term gestational age defined?

- 37 to 38 weeks GA

How is Full Term gestational age defined?

- 39 to 40 weeks GA

How is Late Term gestational age defined?

- 41 weeks GA

How is Post-term gestational age defined?

- 42 weeks GA or greater

What is Gestational Age (GA)?

- The time between the first day of the last menstrual period and the day of delivery

What is Chronological Age?

- The time elapsed since birth

What is Postmenstrual Age (PMA)?

- Gestational age + Chronological age

What is Corrected Age?

- The age of the child calculated from the expected date of delivery

How is Chronological Age calculated?

- Chronological Age = Day of Assessment - Birthday

- Assumes 30 days in a month and 12 months in a year

What is the formula for Corrected Age?

- Corrected Age = Chronological age - weeks preterm

Until what age should Corrected Age be used?

- Until 2 years old, regardless of the amount of prematurity

How do you calculate weeks preterm for age correction?

- Weeks preterm = 40 weeks - Gestational Age (GA)

What is the corrected age of a 6-month-old infant born at 31 weeks GA?

- 3 months 3 weeks (or 15 weeks)

- Calculated as: 24 weeks chronological age - 9 weeks preterm

What is the corrected age of a 2-year-old child born at 28 weeks GA?

- 1 year 9 months (or 21 months)

- Calculated as: 24 months chronological age - 3 months preterm (12 weeks)

What age terminology is appropriate for a baby born at 27 weeks GA assessed 10 weeks after birth?

- Postmenstrual age (37 weeks)

- Corrected age is not used here because the calculation yields a negative value (-3 weeks)

What clinical tool is used for the maturational assessment of Gestational Age?

- The New Ballard Score

What neuromuscular maturity signs are evaluated in the New Ballard Score?

- Posture and square window

- Arm recoil and popliteal angle

- Scarf sign and heel to ear

What physical maturity signs are evaluated in the New Ballard Score?

- Skin and lanugo

- Ear and breast development

- Genital development

How do term and preterm infants differ in weight and length?

- Term: ~3,500 g and 50 cm

- Preterm: 2,500-1,500 g (or less) and much shorter

How do term and preterm infants differ in head circumference and fat pads?

- Term: 35 cm head circumference; fat pads present

- Preterm: Smaller head circumference (but proportionately larger); fat pads absent

How do term and preterm infants differ in passive muscle tone and ROM?

- Term: Flexor dominant; full flexion range

- Preterm: Extensor dominant; wider movement range

How do term and preterm infants differ in resting heart rate and movements?

- Term: Lower resting HR; active movements

- Preterm: Higher resting HR; sluggish movements

How do term and preterm infants differ in visual and auditory responses?

- Term: Shorter periods of looking; body movement response to sound

- Preterm: Look longer; require stronger auditory stimuli