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Author Question: Calculate the effective static compliance (Cs) given the following information about a patient ... (Read 27 times)

itsmyluck

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on: Jul 16, 2018
Calculate the effective static compliance (Cs) given the following information about a patient re-ceiving mechanical ventilation:
 
  peak inspiratory pressure (PIP) is 56 cm H2O, plateau pressure (Pplateau) is 40 cm H2O, exhaled tidal volume (VT) is 650 mL, and positive end expiratory pressure (PEEP) is 10 cm H2O.
  a. 14.1 mL/cm H2O
  b. 16.3 mL/cm H2O
  c. 21.7 mL/cm H2O
  d. 40.6 mL/cm H2O

Question 2

Calculate the pressure needed to overcome airway resistance during positive-pressure ventilation when the proximal airway pressure (PAw) is 35 cm H2O and the alveolar pressure (PA) is 5 cm H2O.
 
  a. 7 cm H2O
  b. 30 cm H2O
  c. 40 cm H2O
  d. 175 cm H2O


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asware1

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

ANS: C
The formula for calculating effective static compliance is Cs = VT/(Pplateau  EEP).

Answer to Question 2

ANS: B
The transairway pressure (PTA) is used to calculate the pressure required to overcome airway re-sistance during mechanical ventilation. This formula is PTA = Paw - PA.


itsmyluck

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

ghepp

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Reply 3 on: Yesterday
Gracias!

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