The ventilator that functions most physiologically uses which of the following?
a. Open loop
b. Double circuit
c. Positive pressure
d. Negative pressure
Q. 2 Which of the following statements best defines elastance?
a. Ability of a structure to stretch.
b. Ability of a structure to return to its natu-ral shape after stretching.
c. Ability of a structure to stretch and remain in that position.
d. Ability of a structure to fill and empty during static conditions.
Q. 3 Use this figure to compute the static compliance (CS) for an intubated patient with an exhaled tidal volume (VT) of 500 mL.
a. 14 mL/cm H2O
b. 20 mL/cm H2O
c. 33 mL/cm H2O
d. 50 mL/cm H2O
Q. 4 Evaluate the combinations of compliance and resistance and select the combination that will cause the lungs to empty slowest.
a. CS = 0.05 L/cm H2O Raw = 2 cm H2O/(L/sec)
b. CS = 0.05 L/cm H2O Raw = 6 cm H2O/(L/sec)
c. CS = 0.03 L/cm H2O Raw = 5 cm H2O/(L/sec)
d. CS = 0.03 L/cm H2O Raw = 8 cm H2O/(L/sec)
Q. 5 What type of ventilator increases transpulmonary pressure (PL) by mimicking the normal mecha-nism for inspiration?
a. Positive-pressure ventilation (PPV)
b. Negative-pressure ventilation (NPV)
c. High frequency oscillatory ventilation (HFOV)
d. High frequency positive-pressure ventila-tion (HFPPV)
Q. 6 Air accidentally trapped in the lungs due to mechanical ventilation is known as which of the fol-lowing?
a. Plateau pressure (Pplateau)
b. Functional residual capacity (FRC)
c. Extrinsic positive end expiratory pressure (extrinsic PEEP)
d. Intrinsic positive end expiratory pressure (intrinsic PEEP)
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