Respiratory assessmet Flashcards
respiration
process of gas exchange
ventilation invlolves:
inspiration and expiration
inspiration
capacity if chest increases, air enters through trachea into the lungs; requires more energy
expiration
lungs recoil and force air out; less energy
how does air flow?
from higher pressure to lower pressure
causes if airway resistance
contraction of smooth muscle, thickening of bronchial mucosa, obstruction of airway, loss of lung elasticity
compliance
elasticity and expandability of lungs and thoracic structures
diffusion
process of O2 and CO2 exchanged; high to low concentration; surfactant process
perfusion
blood flow through pulmonary vasculature; blood flow carrying O2 and CO2; low pressure system
Shunt
perfusion exceeds ventilation; obstruction of distal airways, no gas exchange, main cause of hypoxia after surgery
dead space
ventilation proceeds perfusion; alveoli not supplied with enough blood for gas exchange
silent unit
limited or absent ventilation and perfusion
metabolic acidosis risk factors
diarrhea, fever, hypoxia, starvation, seizure, overdose, renal failure, DKA, dehydration
metabolic acidosis manifestations
bradycardia, weak pulses, hypotension, tachypnea, flaccid paralysis, confusion, hyporeflexia, lethargy, warm flushed, dry skin, kussmual respirations
metabolic acidosis interventions
treat underlying cause, administer fluids, electrolytes