Which type of ventilator creates a sinusoidal pressure waveform ...

[fox]

Which type of ventilator creates a sinusoidal pressure waveform pattern of positive and negative pressures?
 
  a. Fluidic c. Positive-pressure
  b. Pneumatic d. Combined-pressure

Question 2

An iron lung is which type of ventilator?
 
  a. Fluidic c. Negative-pressure
  b. Positive-pressure d. Positive/negative pressure

[CharlieArnold]

Answer to Question 1

ANS: D
A combined-pressure device, such as a high-frequency oscillator, produces oscillating gas pres-sure waveforms at the upper airway, producing a waveform that is sinusoidal, with posi-tive-pressure and negative-pressure oscillations produced at the upper airway.

Answer to Question 2

ANS: C
An iron lung and a chest cuirass are both negative-pressure ventilators that are rarely used in the ventilation of patients these days.

[fox]

Thanks for the timely response, appreciate it

[mjenn52]

Gracias!