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Author Question: Which of the following is the explanation for the increased ratio when excessive positive end ... (Read 42 times)

altibaby

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on: Jul 16, 2018
Which of the following is the explanation for the increased ratio when excessive positive end ex-piratory pressure (PEEP) is used?
 
  a. Diversion of blood from ventilated alveoli to hypoventilated alveoli
  b. Diversion of blood from hypoventilated alveoli to ventilated alveoli
  c. Shunt-like effect
  d. Hyperexpansion

Question 2

Which of the following is the consequence of decreased resistance or compliance?
 
  a. It takes more time to fill the alveoli.
  b. It takes more time to empty the alveoli.
  c. It takes less time to fill and more time to empty the alveoli.
  d. It takes less time to fill and empty the al-veoli.


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fffftttt

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

ANS: A
When excessive PEEP is used, blood flow is diverted from ventilated alveoli to hypoventilated alveoli; the result is an increased ratio.

Answer to Question 2

ANS: D
If compliance or resistance decreases, the time constant for a given lung unit decreases, and the lung fills and empties faster.


altibaby

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Reply 2 on: Jul 16, 2018
:D TYSM

softEldritch

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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