When bedside work of breathing measures are unavailable, you ...

[PhilipSeeMore]

When bedside work of breathing measures are unavailable, you should adjust the level of pres-sure-supported ventilation (PSV) to which of the following breathing patterns?
 
  Spontaneous Rate VT
  a. 20 breaths/min 6 ml/kg
  b. 27 breaths/min 9 ml/kg
  c. 22 breaths/min 4 ml/kg
  d. 10 breaths/min 9 ml/kg

Question 2

In which of the following modes of ventilatory support would the patient's work of breathing be greatest?
 
  a. Continuous positive airway pressure (CPAP)
  b. Pressure-supported ventilation (PSV)
  c. Intermittent mandatory ventilation (IMV)
  d. Continuous mandatory ventilation (CMV)

[carlsona147]

Answer to Question 1

ANS: A
Most clinicians increase PSV until the breathing pattern approaches normal, that is, until the spontaneous ventilatory rate is 15 to 25 breaths/min and the spontaneous tidal volume (VT) is normal (5 to 8 ml/kg).

Answer to Question 2

ANS: A
As the mode is changed from CPAP to PSV to synchronized intermittent mandatory ventilation to time-triggered CMV, the ventilator assumes more of the work.