Author Question: Calculate the static compliance given the following clinical data: tidal volume 600 mL, peak ... (Read 78 times)

kamilo84 · **on:** Jul 16, 2018

Calculate the static compliance given the following clinical data: tidal volume 600 mL, peak in-spiratory pressure (PIP) 40 cm H2O, plateau pressure (Pplateau) 30 cm H2O, positive end-expiratory pressure (PEEP) 15 cm H2O,

and tubing compliance (CT) 2 mL/cm H2O.
a. 14.5 mL/cm H2O
b. 38 mL/cm H2O
c. 55 mL/cm H2O
d. 58 mL/cm H2O

Question 2

A patient-ventilator system check reveals the following information: peak inspiratory pressure (PIP) 32 cm H2O, positive end-expiratory pressure (PEEP) 12 cm H2O, plateau pressure (Pplateau) 20 cm H2O,

inspiratory time (TI) 1 second, and set frequency 12/min. Calculate the mean airway pressure.
a. 4 cm H2O
b. 8 cm H2O
c. 12 cm H2O
d. 14 cm H2O

gabrielle_lawrence · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: B
Static compliance = tidal volume (VT) (Pplateau PEEP) CT/(Pplateau PEEP) = 600 (30 15) 2/30 15 = 570/15 = 38 mL/cm H2O.

Answer to Question 2

ANS: D
Total cycle time (TCT) = 60/frequency = 60/12 = 5. (P-macron)aw = (PIP PEEP) (TI/TCT) + PEEP = (32 12) (1/5) + 12 = (20 0.2) + 12 = 14 cm H2O.