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ABSITE - Critical Care Exam Latest Update
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ABSITE - Critical Care Exam Latest UpdateWhat is the formula for MAP? -ANSWER DBP + 1/3 x (SBP - DBP)
What is the normal range for CO? -ANSWER 4-8 L/min
What is the normal range for CI? -ANSWER 2.5-4 L/min
What is the normal range for SVR? -ANSWER 800-1400 dyn x s/cm^5
What is the normal range for SVR index (SVRI)? - ANSWER 1500-2400 dyn x s/cm^5
What is the normal range for pulmonary capillary wedge pressure (PCWP)? - ANSWER
7-15 mmHg
What is the normal range for central venous pressure (CVP)? - ANSWER 2-6 mmHg
What is the normal range for pulmonary artery (PA) pressure? - ANSWER 20-30/6-15
mmHg
What is the normal range for mixed venous oxygen saturation (SvO2)? - ANSWER 70%
+/-5%
SvO2-what is it? ANSWER O2 saturation in the right ventricle or pulmonary artery,
serves as a marker for peripheral O2 supply and demand
What determines SvO2? ANSWER O2 delivery and extraction
, Percentage of CO that goes to the kidney approximate: ANSWER 25%
Percentage of CO that goes to the brain approximate: ANSWER 15%
Percentage of CO that goes to the heart approximate: ANSWER 5%
What are some complications that can arise with the placing of a central venous
catheter? - ANSWER Pneumothorax, arterial puncture, air or wire embolism,
dysrhythmia, av fistula, pseudoaneurysm
What do you do immediately if a patient receives an air embolus? - ANSWER Roll pt to
left and trendelenberg to keep air in R atrium or ventricle, attempt to aspirate air with
central venous catheter/pulmonary artery catheter
Relative contraindications for placement of pulmonary artery catheter: - ANSWER Left
bundle branch block, h/o pneumonectomy
Treatment of post pulmonary artery catheter placement hemoptysis: - ANSWER
Immediately pull catheter slightly back and re-inflate the balloon, increase PEEP to
tamponade the bleeding, mainstem intubate the contralateral lung, attempt may be
made to place a fogarty catheter down the effected side, may need thoracotomy and
lobectomy
What West zone of the lung is a pulmonary artery catheter supposed to end up in? -
ANSWER Zone 3 (pressure in pulmonary arteries > veins > alveoli)
Which portion of the lung has the highest V/Q ratio and which portion has the lowest V/Q
ratio? - ANSWER V/Q is highest in upper lobes, lowest in lower lobes
In which phase of the respiratory cycle does PCWP reflect left-sided filling pressures
most closely in a ventilated patient? - ANSWER End expiration
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