Complex Disruptions In Peds Flashcards
The exchange of CO2 and O2 between the atmosphere and the alveoli
Ventilation
The exchange of CO2 and O2 between the alveoli and blood
Diffusion
The exchange of CO2 and O2 between the blood and tissues
Perfusion
By ___ week gestation, the rudimentary respiratory system appears
4th
Respiratory passages elongate between ___ week gestation to birth
24th
It is not until the ___ to ___ week of life that typical sharply curved alveoli can be identified
6-8th
Between ___-___ weeks gestation lungs are capable of gas exchange, alveolar cells secrete surfactant, and life becomes possible
26-28
Postnatal growth of the lungs continues until approximately ___ years of age with an increase in number of alveoli and the dimensions of all the airways
8
How are children’s respiratory system different from adults’ respiratory system?
Smaller air passage, softer, looser tissues, highly vascular, swell more easily, less oxygen reserve, high peripheral airway resistance
High peripheral airway resistance and smaller diameter predisposes children to
Obstruction until 5 years of age
S/S of respiratory distress
Tachypnea, nasal flaring, retractions, grunting, see-saw breathing, head-bobbing, stress response, respiratory failure
Normal respiratory rate for infants
30-60 breaths/min
Normal respiratory rate for toddlers (1-3 years)
24-40 breaths/min
Normal respiratory rate for preschoolers (4-5 years)
22-34 breaths/min
Normal respiratory rate for school-age children (6-12 years)
18-30 breaths/min
When is it best to observe a child’s respiration?
When they are calm
Assessment of respiratory problems: history
Health hx, family hx of respiratory disease, smoking in home environment, respiratory disease, current meds
Assessment of respiratory problems: physical examination
Exercise tolerance, breaths sounds (strider, grunting, wheezing), barrel chest, chest pain, cough
Clubbing is not only a sign of HF, but also a symptom of chronic _____ issues in older children
Lung
Newborns are obligate nose breathers until about ___-___ months of age
2-6
Respiratory disease seen exclusively in preterm infants characterized surfactant deficiency, underdeveloped and uninflatable alveoli, and highly compliant chest walls that compromise lung expansion
Respiratory Distress Syndrome (RDS) (AKA hyaline membrane disease)
Function of surfactant
Reduces surface tension and increases lung expansion
Decreased surfactant production causes the collapse of
Alveoli
What are the consequences of surfactant deficiency on the infant’s respiratory system?
Inability to keep lungs inflated, greater effort to re-expand alveoli with each breath. Risk for inadequate oxygen exchange