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ABSITE CRITICAL CARE EXAM 2024 LATEST UPDATED EXAM COMPLETE 250 QUESTIONS WITH DETAILED VERIFIED AND 100% CORRECT ANSWERS ACTUAL NEW GRADE A+ ASSURED$15.49
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ABSITE CRITICAL CARE EXAM 2024
LATEST UPDATED EXAM COMPLETE
250 QUESTIONS WITH DETAILED
VERIFIED AND 100% CORRECT
ANSWERS ACTUAL NEW GRADE A+
ASSURED
Absolute contraindications to intra-aortic balloon pump
placement: - ....ANSWER...Aortic regurg
Aortic dissection
Severe aortoiliac occlusive disease
Relative contraindications to intra-aortic balloon pump
placement: - ....ANSWER...Aortic aneurysm
Aortic or aortofemoral grafts
Desired location for the tip of the intra-aortic balloon
pump catheter? - ....ANSWER...1-2 cm proximal to apex
of aortic arch, just distal to the left subclavian
What is preload? - ....ANSWER...End-diastolic length of
cardiac myocytes. Linearly related to end-diastolic volume
1
,and filling pressure
What is afterload? - ....ANSWER...Resistance against
ventricular contraction (i.e. SVR)
What is contractility? - ....ANSWER...Force of myocardial
contraction
What 3 things determine stroke volume? -
....ANSWER...Preload (LVEDV), afterload, contractility
How is stroke volume calculated? - ....ANSWER...=
LVEDV
How is the ejection fraction calculated? -
....ANSWER...Stroke volume/LVEDV
What is the normal O2 delivery to consumption ratio? -
....ANSWER...5:1
What are the primary determinants of myocardial O2
consumption? - ....ANSWER...HR, myocardial wall
tension
What is the normal range for the alveolar:arterial gradient?
- ....ANSWER...10-15 mmHg
2
,What shifts the oxygen-hemoglobin dissociation curve to
the left? - ....ANSWER...Decreased temp, 2,3-
diphosphoglycerate, pCO2
Increased pH
What shifts the oxygen-hemoglobin dissociation curve to
the right? - ....ANSWER...Increased temp, 2,3-
diphosphoglycerate, pCO2
Decreased pH
What is the definition of shock? -
....ANSWER...Inadequate perfusion of tissue to meet
metabolic needs
What are the 5 broad categories of shock? -
....ANSWER...Hypovolemic, distributive, cardiogenic,
obstructive, neurogenic
What is the formula for the O2 content of blood (CaO2)? -
....ANSWER...(Hgb x %SaO2 x 1.34) + (0.003 x PaO2)
SaO2 is arterial O2 saturation
PaO2 is arterial partial pressure of O2
3
, 2|Page
What is the formula for O2 delivery (DO2)? -
....ANSWER...CaO2 x CO
What is the formula for O2 consumption (VO2)? -
....ANSWER...CO x (CaO2-CvO2) x 10
(Can be rearranged to get Fick equation to calculate mixed
venous O2 saturation)
How many milliliters of oxygen will a gram of hemoglobin
bind when hemoglobin is fully saturated with oxygen? -
....ANSWER...1.34 mL o2 per gram hgb (1.39 mL of
oxygen is normally bound to hemoglobin, but you subtract
the 3%-5% of circulating hemoglobin present as
methemoglobin and carboxyhemoglobin.)
What does the solubility coefficient of 0.03 mL/L/mm Hg
in the oxygen delivery equation signify? -
....ANSWER...0.03 ml O2 dissolves in 1L of water when
PO2 is 1 mmHg at normal body temp (37 degrees)
A 60-year-old man has an arterial PO of 60 mm Hg when
the calculated alveolar PO is 94 mm Hg. This difference is
most commonly due to - ....ANSWER...a ventilation-
perfusion mismatch
2
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