15. DSA Acid Base Flashcards
A sample of blood provides 4 components of the blood..?
- Arterial Oxyen (PaO2)
- Arterial Carbon Dioxide (PaCO2)
- Arterial pH (pHa)
- Arterial bicarbonate (HCO3)
What values would you use for PaCO2, pHa, and HCO3?
PaCO2= 40mmHg
pHa=7.40
HCO3=24mEq/L
More bicarbonate and less bicarbonate in the arterial blood would change pH how?
More, = more basic so increases pH Less= more acid blood so decreases pH
What is the main factor that changes bicarbonate levels?
The kidneys! GI tract
Arterial CO2 also can change the pH, an increase can lead to?
H2CO3 increase, which leads to H+ increase, which would lower the pH
Arterial CO2 is decreased, so the product is too much, what would this lead to?
Less H2CO3, less H+, so the pHa will increase and become more basic
Anything that alters CO2 would be considered a respiratory disturbance while anything that alters HCO3 is considered?
A metabolic disturbance
If the pHa is 7.30 what would the blood be considered?
Acidosis, can be caused by respiratory or metabolic problem
Given that CO2 is 50 and HCO3 is 24, this would lead to the assumption that?
The cause of a 7.3 pHa is due to respiratory acidosis. Meaning there is an increase in CO2, causing a decrease in the pHa
AGAIN what are the normal values for pH, PaCO2, PaO2, and HCO3?
pH: 7.4
PaO2: 90-100mmHg
PaCO2: 40mmHg
HCO3: 24mEq/L
When there is an INCREASE in HCO3 or a DECREASE in CO2, can we expect alkalosis or acidosis?
ALKALOSIS
When there is a decrease in HCO3 or a increase in CO2, can we expect alkalosis or acidosis?
ACIDOSIS
