abg Flashcards

1
Q

causes of metabolic alkalosis

A

vomiting, burns, potassium depletion, NG drainage

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2
Q

abg in met alk

A

high pH, high HCO3

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3
Q

causes of metabolic acidosis

A

DKA, lactic acidosis (sepsis and tissue ischaemia), renal failure, pancreatitis, drugs (salicylate, ethylene glycol, biguanides - metformin - causes lactic acidosis)

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4
Q

abg in met acid

A

low pH, low HCO3

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5
Q

causes of respiratory alk

A

hyperventilation (anxiety, altitude, PE, asthma), HTN

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6
Q

abg in resp alk

A

pH high, low CO2

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7
Q

causes of respiratory acid

A

severe asthma, copd exacerbation, hypoventilation

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8
Q

abg in resp acid

A

pH low, high CO2

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9
Q

abg in type 1 resp failure

A

low O2 <8 , normal CO2

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10
Q

abg in type 2 resp failure

A

low O2, high CO2

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11
Q

causes of type 1 resp failure

A

hypoxia, VQ mismatch

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12
Q

causes of type 2 resp failure

A

CNS depression, ventilatory failure, physical abnormalities

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13
Q

causes of increased HCO3

A

metabolic alkalosis or respiratory acidosis with metabolic compensation

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14
Q

causes of decreased HCO3

A

metabolic acidosis or metabolic acidosis with respiratory compensation

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15
Q

causes of decreased CO2

A

respiratory alkalosis or metabolic acidosis with respiratory compensation

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16
Q

what is pH

A

measure of H+ in blood

17
Q

what is PaCO2

A

indicates how well CO2 is moving out of blood into lungs and ventilation

18
Q

what is HCO3

A

chemical buffer than keeps blood pH normal

19
Q

what is base excess

A

measure of excess acid or base in blood

20
Q

high HCO3 and high BE

A

metabolic alkalosis or compensated res acid

21
Q

low BE and low HCO3

A

met acid or com respiratory alk

22
Q

rate of compensation

A

res can be quick, met is days

23
Q

what can cause mixed

A

co2 and hco3 moving in opposite directions

cardiac arrest, multi organ failure, liver cirrhosis, hyperemesis,

24
Q

anion gap

A

na - (cl+hco3)

25
Q

what causes an increased anion gap

A

DKA, lactic acidosis, aspirin overdose

26
Q

what causes a decreased anion gap

A

GI loss of H+, renaltubxlar acidosis, addisons