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Author Question: Ventricular contractility can be estimated by which of the following? a. Systemic vascular ... (Read 25 times)

lb_gilbert

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on: Jul 16, 2018
Ventricular contractility can be estimated by which of the following?
 
  a. Systemic vascular resistance
  b. Ejection fraction
  c. Pulmonary vascular resistance
  d. Left ventricular stroke work

Question 2

During mechanical ventilation of a patient with COPD, the PaCO2 = 58 mm Hg and the minute ventilation = 5.5 L/min. The desired PaCO2 for this patient is 45 mm Hg. To what should the mi-nute ventilation be changed?
 
  a. 4.3 L/min
  b. 4.8 L/min
  c. 6.6 L/min
  d. 7.1 L/min


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Anton

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: B
The ejection fraction is a derived variable that provides an estimate of ventricular contractility. The systemic vascular resistance is an indicator of left ventricular afterload. Pulmonary vascular resistance indicates right ventricular afterload. Left ventricular stroke work reflects the pressure generated by the heart during a ventricular contraction.

Answer to Question 2

ANS: D
Desired VT Known PaCO2 Known VT / Desired PaCO2


lb_gilbert

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Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

lcapri7

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Reply 3 on: Yesterday
Excellent

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