Premature and SGA infants from notebooklm

What weight threshold defines a Low Birth Weight (LBW) infant?

<5 lb $8 oz

What weight threshold defines a Very Low Birth Weight (VLBW) infant?

< 3 lb 5 oz

What weight threshold defines an Extremely Low Birth Weight (ELBW) infant?

< 2 lb 3 oz

What weight threshold defines a 'Micro-preemie'?

<1 ¾ lb

A baby is classified as Small for Gestational Age (SGA) if they fall below what percentile for birth weight, length, or head circumference?

10 th percentile

List three maternal factors that can lead to a Small for Gestational Age (SGA) infant.

Maternal illness, smoking, and malnutrition.

Definition: Gestational Age (GA)

The total number of weeks the infant was in utero before birth.

What are the two primary methods used to determine an infant's gestational age?

Dating the last menstrual cycle and ultrasonography.

What gestational age range defines an infant as 'Extremely preterm'?

< 28 weeks

What gestational age range defines an infant as 'Very preterm'?

28 to 31 6/7wk

What gestational age range defines an infant as 'Moderate preterm'?

32 to 33 6/7 wk

What gestational age range defines an infant as 'Late preterm'?

34 to 36 6/7 wk

What gestational age range defines an infant as 'Early term'?

37 to 38 6/7 wk

What gestational age range defines an infant as 'Full term'?

39 to 40 6/7 wk

What gestational age range defines an infant as 'Late term'?

41 to 41 6/7 wk

What gestational age defines an infant as 'Post term'?

>42 wk

Name three maternal lifestyle or healthcare factors that can cause prematurity.

Substance abuse/smoking, inadequate prenatal care, and being an adolescent mother.

How do intrauterine infections impact pregnancy duration?

They are a known cause of prematurity.

According to 2018 US data, which racial group had the highest infant mortality rate?

Non-Hispanic Black ($11.3$ per $1,000$ live births)

At 24 weeks gestation, what is the typical appearance of the infant's skin?

Gelatinous

Describe the state of the infant's eyes at 24 weeks gestation.

Fused

What is the characteristic muscle tone and movement of an infant at 24 weeks gestation?

No muscle tone or movement; the baby is bound by gravity.

What is 'lanugo' and at what gestational age is it typically seen?

Fine body hair; appears at 28 weeks.

At 32 weeks gestation, in which area of the body does muscle tone first begin to develop?

Lower extremities (LEs)

At 34 weeks gestation, what significant change occurs in the infant's upper extremities (UEs)?

Muscle tone in the UEs is developed.

What is the primary difficulty infants face at 34 weeks regarding feeding and respiration?

Coordinating breathing and sucking.

At 36 weeks, how might a premature infant react to overstimulation?

By averting eye gaze, turning the head, or shutting down into sleep.

What is the physiological cause of Hyaline Membrane Disease (HMD) / Respiratory Distress Syndrome (RDS)?

Decreased production of surfactant which keeps the alveoli stable for gas exchange.

List three clinical signs of Respiratory Distress Syndrome (RDS) in an infant.

Nasal flaring, cyanosis, and tachypnea.

What medical intervention is given to mothers to stimulate surfactant production if premature birth is expected?

Steroids

What defines Bronchopulmonary Dysplasia (BPD) in terms of postnatal age and treatment requirements?

Requirement of supplemental oxygen or mechanical ventilation beyond 28 days.

Name two long-term risks for infants diagnosed with Bronchopulmonary Dysplasia (BPD).

Limited tolerance for physical exercise and increased risk of developmental disabilities.

What is Retinopathy of Prematurity (ROP) and what causes it?

Retinal detachment caused by oxygen fluctuations and immature retinal vascular development.

Which weight category of infants is at the greatest risk for Retinopathy of Prematurity (ROP)?

Extremely Low Birth Weight (ELBW)

What is the function of the 'Ductus Arteriosus' during fetal development?

It connects the pulmonary artery to the descending aorta to bypass the lungs.

What condition occurs if the Ductus Arteriosus fails to close after birth?

Patent Ductus Arteriosus (PDA)

How does Patent Ductus Arteriosus (PDA) affect oxygen delivery to the body?

It diverts blood away from the lungs, decreasing oxygenated blood to the body and brain.

What is Gastroesophageal Reflux (GER) in infants?

Regurgitation of stomach contents into the esophagus due to a weak gastric sphincter or slow emptying.

What specific postural sign in an infant may indicate Gastroesophageal Reflux (GER)?

Back arching

Definition: Necrotizing Enterocolitis (NEC)

Severe injury to the bowel wall, often managed by withholding oral feeds.

How much more frequent is SIDS in premature infants compared to full-term infants?

Twice as frequent

What are three recommended environmental precautions to prevent SIDS?

Sleep on the back, avoid fluffy blankets/toys in crib, and maintain a smoke-free home.

Definition: Grade I Intraventricular Hemorrhage (IVH)

Bleeding into the germinal matrix (vessels in the roof of lateral ventricles).

Definition: Grade II Intraventricular Hemorrhage (IVH)

Hemorrhage that expands beyond the germinal matrix into the ventricular system.

Definition: Grade III Intraventricular Hemorrhage (IVH)

Acute dilation of the ventricular system due to flooding of $50\%$ or more of lateral ventricles.

Definition: Grade IV Intraventricular Hemorrhage (IVH)

Hemorrhage that damages white matter surrounding the ventricles (Periventricular Leukomalacia).

What is Periventricular Leukomalacia (PVL)?

Damage to white matter surrounding the ventricles where the tissue develops into cysts.

Name three potential neurological outcomes of high-grade IVH or PVL.

Cerebral palsy, intellectual disabilities, or hydrocephalus.

What are the three common patterns of Cerebral Palsy associated with Periventricular Leukomalacia (PVL)?

Spastic diplegia, hemiplegia, and spastic quadriplegia.

What is the primary focus of the 'newer approach' to NICU care compared to traditional care?

Individualized, relationship-based, and developmentally supportive care involving parents.

What is the role of an Occupational Therapist (OT) regarding the physical environment of the NICU?

To modify sensory aspects of the environment according to the infant's threshold.

List three benefits of optimal positioning for a premature infant in the NICU.

Impacts postural development, improves respiratory stability, and decreases stress responses.

How does optimal positioning help an infant's behavioral regulation?

It enhances the baby's ability to engage in self-soothing or self-calming behaviors.

What is the therapeutic purpose of 'containment' in positioning a baby?

To meet sensory needs for security while still allowing for movement.

In the context of NICU OT, what is 'Caregiver-child bonding'?

Interventions that reinforce the family's role and support the infant's medical status.

Benefits of Early intervention programs:

neurodevelopment of most premature infants through 3–5 years of age

Other Intervention strategies for premature infants are:

Group meetings for parents, home visits, and (after 24 months chronological age) attendance at a multidisciplinary child development

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