Arterial blood Gases Flashcards
What is an arterial blood gas test
Tells us about gas quantities in the blood
Compare arterial and venous blood gas tests
Arterial: How well were exchanging oxygen
Venous: How utilization is going (extracting at the tissue)
What are normative values for pH
7.35-7.45
What are normative values for PaO2
80-100 mmHg
What are normative values for PaCO2
35-45 mmHg
What are normative values for HCO3
22-26 mmol/L
What are normative values for SaO2
95-100%
What are 3 things that arterial blood gas tests tell us
Describe this image
Narrow range of control within the body in terms of pH -> body cannot support life too far out of those ranges
How much of our body is comprised of water
Characteristics of strong Acids/Base, weak acids/base and buffers
What does ATP produced
CO2 so we need a way to deal with CO2 to prevent acidic accumulation
How is CO2 transported around the body
What is normal ratio of base to acid in the blood
<7.35 pH
Acidemia
> 7.45 pH
Alkalemia
What are 2 way to eliminate metabolically produced acids in the body
What is the relationship between the renal and respiratory system in terms of acid-base balance
What is regulated by the kidneys and lungs
If HCO3 changes first that indicates a
Metabolic disorder (kidneys)
If PaCO2 changes first that is a
Respiratory disorder (lungs)
What is acidosis and give 2 examples (1 metabolic and one respiratory)
What is alkalosis and give 2 examples (1metabolic and 1 respiratory)
What is compensation in terms of pH changes
What are 3 methods of pH compensation
How do buffer systems act as compensators
How do respiratory regulators act as compensators
How does renal regulation act as a compensator
Describe lungs and kidneys when acid-base balance
Describe the 2 situations that cause acidosis (lungs vs kidneys)
Describe the 2 situations that cause alkalosis
Steps to determine blood gas
Do practice examples in one note document
What are the 4 mechanisms of hypoxemia
