A patient triggered, pressure limited, flow cycled breath ...

[Mr.Thesaxman]

A patient triggered, pressure limited, flow cycled breath describes which of the following?
 
  a. Spontaneous breath
  b. Pressure-support breath
  c. Volume-control breath
  d. Pressure-control breath

Question 2

Every breath from the ventilator is time or patient triggered, pressure limited, and time cycled. This describes which of the following ventilator modes?
 
  a. Pressure support ventilation (PSV)
  b. Continuous positive airway pressure (CPAP)
  c. Pressure-controlled continuous mandatory ventilation (PC-CMV)
  d. Volume-controlled intermittent mandatory ventilation (VC-IMV)

[macagnavarro]

Answer to Question 1

ANS: B
The term pressure limited points to either a pressure support breath or a pressure control breath. These breaths both are limited by the operator-selected pressure. A spontaneous breath is always flow cycled. This eliminates the pressure control breath because those breaths are always time cycled. Therefore, a patient triggered, pressure limited, flow cycled breath is a pressure support breath.

Answer to Question 2

ANS: C
A mode in which the patient can receive a time triggered breath or a patient triggered breath is continuous mandatory ventilation (CMV or A/C). Pressure limited breaths that are either time or patient triggered occur in pressure-controlled continuous mandatory ventilation (PC-CMV), where the breath is also time cycled. Pressure support ventilation (PSV) breaths are always flow cycled. Continuous positive airway pressure (CPAP) breaths are always spontaneous, and vol-ume-controlled intermittent mandatory ventilation (VC-IMV) breaths are volume limited and volume cycled.

[Mr.Thesaxman]

Excellent

[xiazhe]

Gracias!