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Flashcards in 5b Deck (15):
1

Rule of 4

pH 7.4 +/- 0.04pCO2 40 +/- 4HCO3 24 +/- 4 BE -/+ 4

2

PaO2 in venous vs arterial samples

venous PaO2 52 arterial PaO2 92

3

define a mixed acid base disorder

if compensatory response exceeds or falls short of the expected response, a mixed disorder may be present

4

respiratory disturbances

look at PaCO2decr alkalosisincr acidosis

5

metabolic disturbances

look at HCO3incr alkalosisdecr acidosis

6

respiratory acidosis

HYPOventilation (NM or structural diseases, toxins, cervical IVDD, airway obstruction)incr PaCO2compensatory retention of renal HCO3 (usually takes 3-5 days)

7

respiratory alkalosis

HYPERvent (hypoxemia, lung dz, activation of central reps centers, pain, anxiety)decr PaCO2

8

avoid hyper ventilation/respiratory alkalosis in what group of trauma patients

HEAD TRAUMA ( hi intracranial P patients)hypervent and low PaCO2 causes cerebral vasoconstrictiondecrease cerebral blood flow

9

metabolic acidosis

HCO3 decr (loss from kidneys, GI)

10

anion gap

AG= (Na+K)-(Cl+HCO3)

11

causes of high AG

Metabolic acidosisK--ketonesL --lactic acidU--uremic acidE--ethylene glycol toxS--salicylate tox

12

acid base status of addisonian patient

metabolic acidosis with hypochloremia (normal AG)

13

sodium bicarbonate dosing

to treat metabolic acidosisgoal pH 7.2mEq bicarb = 0.3 x kg x base deficit

14

metabolic alkalosis

incr HCO3due to loss of Cl (vomiting, suction GI contents, admin diuretics) or gain in exogenous alki

15

T/F a patient can have concurrent respiratory alkalosis and acidosis

FALSE a patient can have any combo of two primary disorders EXCEPT respiratory acidosis/alkalosis