Calculate the cerebral perfusion pressure when the mean arterial blood pressure is 120 mm Hg and the ...

Calculate the cerebral perfusion pressure when the mean arterial blood pressure is 120 mm Hg and the ICP is 14 mm Hg.
 
  a. 134 mm Hg
  b. 106 mm Hg
  c. 120/14 mm Hg
  d. 134/106 mm Hg

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Q. 2  During spontaneous breathing, the fall in intrapleural pressure that draws air into the lungs during inspiration also draws blood into the major thoracic vessels. This phenomenon increases which of the following?
 
  a. Systemic vascular resistance
  b. Right ventricular afterload
  c. Right ventricular preload
  d. Pulmonary capillary resistance

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Q. 3  Which of the following ventilator parameters would result in the highest mean airway pressure?
 
  a. PIP = 30 cm H2O; PEEP = 10 cm H2O; TI = 0.5 sec; TCT = 5 sec
  b. PIP = 50 cm H2O; PEEP = 10 cm H2O; TI = 0.5 sec; TCT = 5 sec
  c. PIP = 30 cm H2O; PEEP = 15 cm H2O; TI = 0.5 sec; TCT = 5 sec
  d. PIP = 50 cm H2O; PEEP = 10 cm H2O; TI = 0.5 sec; TCT = 5 sec

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Q. 4  Urinary output is severely reduced when the renal arterial pressure decreases below what level?
 
  a. 75 mm Hg
  b. 85 mm Hg
  c. 95 mm Hg
  d. 105 mm Hg

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Q. 5  Positive pressure ventilation has which of the following effects on the kidneys?
 
  a. Increases blood flow to the kidneys
  b. Redistributes blood flow in the kidneys
  c. Decreases sodium reabsorption in the kid-neys
  d. Increases urinary output