CPAP exam 4 Flashcards
What % of O2 is in plasma vs bound to hemoglobin?
3% plasma and 97% bound to Hb
ABGs read Os levels where?
ABGs read the O2 that is dissolved in plasma
Normal Hb levels for male and female
Male: 14-16 g/100mL
Female: 12-15
Why is adult Hb never fully 100% saturated?
This is due to normal anatomical shunts.
Left shift at the lung
This would mean there is an increase in affinity which would increase the loading of O2
What 3 things, if increased will cause a right shift in the curve?
Increased H+ ions (acid), CO2, and temperature.
Where do you want a left shift in the curve to occur in the body, what about a right shift?
Left shift at Lung, Right at Tissue
Which shift causes a decreased affinity?
Right shift, which would increase offloading of O2 at tissue site.
Three main factors that decrease oxygen delivery
Decreased Hb levels, oxygen in blood (PaO2), and decreased CO.
shunt
blood flow without ventilation
deadspace
ventilation without blood flow
four types of hypoxia
Hypoxic, anemic, circulatory, histotoxic
hypoxemia
Low PaO2 in blood
hypoxia
Inadequate tissue oxygenation
carbonic anhydrase
The enzyme catalyst that helps create the formation of HCO3