Infancy Flashcards
(69 cards)
What is infancy?
Birth to 1 year old
- During this time will usually triple weight and increase length by 50%
- Per unit size, nutrient needs greater than at any other stage of life
What are goals of nutrition during infancy?
Provide energy and nutrients to support rapid growth
- Growth rate and relative energy needs are higher during infancy than during any other phase of life
Lay basis for formation of goof eating habits
Start transition from feeding to eating
In the In the first few days after birth, an infant’s weight
typically:
A. Increases by about 5-10% of their birthweight
B. Decreases by about 5-10% of their birthweight
C. Stays about the same as their birthweight regardless of
whether they were fed formula or breastmilk
B. Decreases by about 5-10% of their birthweight
What is the newborn weight trajectory?
Surplus fluid loss
Meconium
Should regain weight by day 10-14
By approximately what age are infants expected to double
their birthweight
A. Two months
B. 4-6 months
C. 1 year
D. 2 years
E. 3-4 years
B. 4-6 months
What is the physical growth of infant?
Most rapid growth of entire life
- weight loss immediately after birth; regain by ~d 7-10
- double birth weight by 4-6 months; triple by 1 year; quadruple by 2.5 years
Weight gain due to increase in lean and fat tissue
- small sex difference
**Energy needs per unit body weight are ~triple those of adults **
What is the skeletal growth?
Length increases by 50% in first year
- Body calcium doubles
Under nutrition or repeated infections can lead to stunting b/c most of the energy goes toward fighting infections
What is stunting?
Condition where a child is too short for their age
May impair ability to reach both physical and cognitive potential, and increase risk of chronic disease later in life - not enough nutrient and energy
Why should you monitor growth & development for infancy?
Appropriate growth is one of the signs of good health
* Delayed or rapid growth may be due to malnutrition or
another health issue
* Cognitive, social, and motor development assessed through
reaching milestones
What are the methods to measure growth of infants?
Lengths
Weight
Head circumference
Explain the WHO Growth Charts
- WHO Growth Charts provide an international standard to represent physiological growth of children from birth to 5 years
- 8500 children, 6 countries (Brazil, Ghana, India, Norway, Oman, United States)
- Infants (singletons) born at term to non-smoking mothers, good SES, mothers intending to breastfeed
- Key indicators: weight for age, length for age, weight for length, head circumference
Healthy Growth Patterns of infants
Between 3rd and 85th percentiles - WHO Growth Charts
* Note: A single measurement cannot be used as a diagnostic criteria – it provides insight into potential risk and signals need for additional assessment and monitoring
Similar percentiles for weight & length
”Tracking” with consistent percentiles over time.. but crossing can occur in the first 2-3 years
Growth pattern OVER TIME is more important than one single measurement
Growth for perterm infants (<37 weeks)
Growth catchup does not occur immediately
Recommended to use corrected postnatal age until 24 or 36
months
Corrected age:
* Postnatal age in weeks – [40 weeks – gestational age in weeks])
* For example, at 12 weeks postnatal age, an infant born at 30
weeks gestational age would be:
12 – [40-30] or 2 weeks corrected postnatal age
- 10 wks early
With respect to assessing growth, which of the following is/are
TRUE?
A. A normal growth pattern tends to follow the same
percentile growth curve over time
B. A measurement at a higher percentile is better (e.g., a
weight-for-length measurement at the 75th percentile is
better than a weight-for-length measurement at the 20th
percentile)
C. Measurements at the 50th percentile should be the goal
for each child’s growth
D. All of the above are true
E. A and B are true
A. A normal growth pattern tends to follow the same
percentile growth curve over time
What else would you want to know make a through assessment of growth pattern?
Head circumference
Length
Feeding frequency
Diaper - wet + solid
Sleeping
Alertness
Gastrointestinal function: Mouth
Lingual lipase hydrolyzes MCT
Gastrointestinal function: Stomach
- pH decreases from 6.0 (birth) to 2.0 (2 months)
- Low pepsin activity in early infancy
- Weak gastric sphincter – prone to vomiting and reflux
- Stomach capacity increases from ~10 ml (shortly after birth)
to 200-300 ml (1 year)
Gastrointestinal function: Small intestine & pancreativ function and Large intestine
Small intestine & pancreatic enzymes
Protein: digestion well developed
Fat: low levels of lipase and bile salts
* 85-90% of human milk fat is absorbed (vs 70% in cow’s milk) vs >95% in adults
Carbohydrates: Low pancreatic amylase; starch poorly digested
- not much starch in human milk
Large intestine: development of gut microbiotia
- HMO
What is the main source of carbohydrate in breastmilk?
A. Starch
B. Sucrose
C. Lactase
D. Lactose
E. Glucose
D. Lactose
List two key adaptations to the fat content of human milk that improve fat absorption
Medium fatty acids
Palmitate at sn:2
What are the components of cognitive development & nutrition?
Nutrients for growth and brain development
Environmental stimulation
Optimal Cognitve development
What key nutrients are important for brain growth and
development? [Select all that apply]
A. Iron
B. Omega-3 fatty acids
C. Sodium
D. Potassium
E. Calcium
A. Iron
B. Omega-3 fatty acids
What are the reflexes?
**1. Rooting **
- Touching of the cheek or side of the mouth
- Baby turns to the source and opens month. Is able to seek the breast or bottle
- ~4 months
**2. Sucking/swallowing **
- Touching of the mouth
- Baby sucks (finger, nipple, or heat); coordinated with swallowig enabling the infant to feed safetly in a very reclined position
- ~4 months
3. Extrusion (tongue thrust)
- Touching of the lips
- Tongue moves forward out of the mouth. Assists with feeding from breast or bottle but not solid foods. Protests against choking
~6 months
4. Gag
- Placing an object towards back of the mouth
- expelled from back of mouth by the tongue. protests against choking
Based on when oral reflexes disappear, when would you
introduce solid foods?
A. At 2 months
B. At 4 months
C. At 6 months
D. At 12 months
C. At 6 months