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27 Cards in this Set

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  • Back
when H= increases to pH
decreases
range for pH
7.35 - 7.45
PaO2 range
80-100mhHg
PaO2 range elderly
60-80mmHg
If PaO2 < 60
controled interventions
Panic range for pH
7.2 - 7.6
PaCO2 means
partial presure of CO2 disolved in arterial plasma
CO2 is an ... that is regulated by the lungs
acid
resp acidosis caused by ...
retention of CO2
Respiritry alkilosis caused by
hyperventilation
metabolic acidosis caused by (2)
gain of metabolic acids
loss of base
how are metabolic acids gained? (4)
renal faliure
diabetic ketoacidosis
lactic acidosis
drug overdose
how are metabolic basses lost?
diarhear
how are metabolic basses gained
injestion of antacids
excess administration of sodium bicarbonate
how are metabolic acids lost? (5)
Vomiting, nasogastric suctioning, low potasium and/or chloride
diuretics (loss of potasium and or chloride)
increased levels of aldosterone
HCO3- reflects? (1)
concentration of sodium bicarbonate in blood
HCO3- range
22-26mEq/L
HCO3- regulated by
kidneys
High HCO3- =
metabolic alkalosis
low HCO3- =
metabolic acidosis
HCO3- .... acids
neutralises
three buffer systems
blood, resp systems and kidneys
as H+ (hydrogen ion concentration) rises the pH:
falls
... combines with .... to form carbonic acid
HCO3- , H+
how is carbonic acid (H2CO3) excreted?
broken down HCO3- , H+
buffer system mechanism equasion?
H+ + HCO3- ->
H2CO3 ->
H20 + CO2
Steps in ABG interpretation (4)
evaluate oxygenation
evaluation acid bass status
evaluate primary imbalance
has a compencation responce taken place?