Calculate the dynamic compliance given the following clinical ...

[TVarnum]

Calculate the dynamic compliance given the following clinical data: tidal volume 500 mL, peak inspiratory time (PIP) 35 cm H2O, plateau pressure (Pplateau) 20 cm H2O, positive end-expiratory pressure (PEEP) 5 cm H2O,
 
  and tubing compliance (CT) 2.5 mL/cm H2O.
  a. 11.8 mL/cm H2O
  b. 14.2 mL/cm H2O
  c. 25 mL/cm H2O
  d. 46.2 mL/cm H2O

Question 2

Calculate dynamic compliance given the following clinical data: tidal volume 600 mL, peak in-spiratory pressure (PIP) 28 cm H2O, plateau pressure (Pplateau) 15 cm H2O, positive end-expiratory pressure (PEEP) 10 cm H2O, and CT 2 mL/cm H2O.
 
  a. 30.2 mL/cm H2O
  b. 31.3 mL/cm H2O
  c. 38 mL/cm H2O
  d. 44.1 mL/cm H2O

[momo1250]

Answer to Question 1

ANS: B
Dynamic compliance = tidal volume (VT)  (PIP  PEEP)  CT/(PIP  PEEP) = 500  (35  5)  2.5/(35  5) = 14.2 mL/cm H2O.

Answer to Question 2

ANS: B
Dynamic compliance = tidal volume (VT)  (PIP  PEEP)  CT/(PIP  PEEP) = 600  (28  10)  2/(28  10) = (600  36)/18 = 31.3 mL/cm H2O.