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Author Question: The area under the curve of a single-breath carbon dioxide (SBCO2) curve represents which of the ... (Read 49 times)

storky111

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The area under the curve of a single-breath carbon dioxide (SBCO2) curve represents which of the following?
 
  a. Tidal volume
  b. Alveolar dead space
  c. Physiologic dead space
  d. Effective alveolar ventilation

Question 2

The area represented by the letter Y in the figure is which of the following?
 
  a. End-tidal carbon dioxide (EtCO2)
  b. Alveolar ventilation
  c. Alveolar dead space
  d. Airway dead space



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daiying98

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Answer to Question 1

ANS: D
The area under the single-breath carbon dioxide (SBCO2) curve represents alveolar volume. This is known as phase 3 on the SBCO2 curve. Phase 1 is the anatomical dead space volume. Phase 2 is a transitional phase between anatomical dead space and alveolar volume.

Answer to Question 2

ANS: C
The end-tidal carbon dioxide (EtCO2) is represented by the very end of the waveform. The alve-olar ventilation is represented by the area under the curve, which is X. The alveolar dead space is represented by the difference between the arterial partial pressure of carbon dioxide (PaCO2) and the EtCO2 line, which is Y. The airway dead space is represented by Z.




storky111

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Reply 2 on: Jul 16, 2018
Thanks for the timely response, appreciate it


anyusername12131

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Reply 3 on: Yesterday
Gracias!

 

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