ABGs Flashcards
What is a VBG?
Where is an ABG taken from?
Taken from an artery
Why is an ABG important?
Real time reflection of patient’s current physiological state
ABGs are taken from arteries that have ____ supply.
eg. Radial, femoral and dorsals ____
MUST DO _____ test for radial artery before collection.
collateral
pedis
Allen’s
Indications to do the test based on clinical picture/history…
Low PAO2 =
Hypoxia
High O2 =
> 100mmHg suspect patient is on supplementary oxygen
Normal O2 =
> 75 mmHg
PaCO2 normal range =
35 - 45mmHg
PaCO2 >45mmHg =
Hypercarbia
CO2 retention
PaCO2 <35mmHg =
Hyperventilation
CO2 being blown off
Cause?
Cause?
Type 1 respiratory failure
Hypoxia
Hypercarbia
Type 2 respiratory failure
Hypercarbia
Hypoxia
How is pH regulated?
How is acid/base metabolism regulated by the body?
How are the kidneys involved in regulation?
How is the respiratory centre involved in regulation?
What is the buffer system?
What is ROME wasn’t built in a day?
Base excess
normal range = -2 to +2
> +2 =
Base excess
normal range = -2 to +2
> -2 =
What is an anion gap?
AG = anions - cations
AG = (Na+ + K+) - (Cl- + HCO3-)
Normal range for anion gap =
16 - 20mmol/l
Causes of HAGMA:
Causes of NAGMA:
