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Author Question: What is the volume that will reach the patient when the volume setting is 700 mL, the tubing ... (Read 36 times)

frankwu

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on: Jul 16, 2018
What is the volume that will reach the patient when the volume setting is 700 mL, the tubing compliance is 2 mL/cm H2O, and the measured peak inspiratory pressure is 35 cm H2O?
 
  a. 770 mL c. 665 mL
  b. 698 mL d. 630 mL

Question 2

What is the compressibility factor for the patient circuit when the ventilator volume is set at 100 mL, the recorded peak inspiratory pressure is 41 cm H2O, and the measured volume is 68 mL?
 
  a. 0.41 cm H2O/mL c. 1.66 mL/cm H2O
  b. 0.60 cm H2O/mL d. 2.44 mL/cm H2O


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Yixagurpuldink

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

ANS: D
Volume lost because of tubing compliance is equal to the set volume minus the tubing compliance multiplied by the measured peak inspiratory pressure. Volume lost = 700 mL ?2- (2 mL/cm H2O  35 cm H2O) = 700 mL ?2- 70 mL = 630 mL.

Answer to Question 2

ANS: C
The compressibility factor of a patient circuit is the circuit's tubing compliance. Tubing compli-ance equals the measured volume divided by the measured peak inspiratory pressure (Tubing compliance = Volume/Peak inspiratory pressure). Tubing compliance = 68 mL  41 cm H2O = 1.66 mL/cm H2O.


frankwu

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Reply 2 on: Jul 16, 2018
Wow, this really help

kalskdjl1212

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

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