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Author Question: What is the inspiratory time for a frequency of 30 breaths/min and an inspiratory time-to-expiratory ... (Read 35 times)

joe

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on: Jul 16, 2018
What is the inspiratory time for a frequency of 30 breaths/min and an inspiratory time-to-expiratory time ratio of 1:3?
 
  a. 0.13 second c. 0.75 second
  b. 0.50 second d. 2.00 seconds

Question 2

What is the inspiratory time for a tidal volume of 600 mL and a flow rate of 60 L/min?
 
  a. 0.1 second c. 1.0 second
  b. 0.6 second d. 6.0 seconds


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jointhecircus

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

ANS: B
Total cycle time = 60 s  frequency = 60  30 = 2 s. There are four equal parts to the total cycle time (add the I from the inspiratory time-to-expiratory time ratio to the E from the inspirato-ry time-to-expiratory time ratio, or 1 + 3 = 4). Inspiratory time = Total cycle time  (I + E) = 2  4 = 0.5 s.

Answer to Question 2

ANS: B
Inspiratory time = Tidal volume (in liters)  Flow rate (in liters/second) = 0.6 L  1 L/s = 0.6 s.


joe

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

sultana.d

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Reply 3 on: Yesterday
Great answer, keep it coming :)

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