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Author Question: The statement that describes the alveolus shown in Figure 1-1 is which of the following? 1. ... (Read 107 times)

rlane42

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on: Jul 16, 2018
The statement that describes the alveolus shown in Figure 1-1 is which of the following?
 
  1. Requires more time to fill than a normal alveolus.
  2. Fills more quickly than a normal alveolus.
  3. Requires more volume to fill than a normal alveolus.
  4. More pressure is needed to achieve a normal volume.
  a. 1 and 3 only
  b. 2 and 4 only
  c. 2 and 3 only
  d. 1, 3, and 4

Question 2

Calculate airway resistance (Raw) for a ventilator patient, in cm H2O/L/sec, with the following information: Peak inspiratory pressure (PIP) is 20 cm H2O, plateau pressure (Pplateau) is 15 cm H2O, PEEP is 5 cm H2O, and set flow rate is 50 L/min.
 
  a. 5 Raw
  b. 6 Raw
  c. 10 Raw
  d. 15 Raw


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reelove4eva

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

ANS: B
The figure shows a low-compliant unit, which has a short time constant. This means it takes less time to fill and empty and will require more pressure to achieve a normal volume. Lung units that require more time to fill are high-resistance units. Lung units that require more volume to fill than normal are high-compliance units.

Answer to Question 2

ANS: B
Raw = (PIP  Pplateau)/flow and flow is in L/sec.


rlane42

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

jordangronback

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Reply 3 on: Yesterday
Gracias!

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