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MV - Exam #2
Mechanical Ventilation Exam 2
| Question | Answer |
|---|---|
| What does VC-CMV stand for? | Volume Control - Controlled Mandatory Ventilation |
| How is VC-CMV triggered? | Time triggered |
| How is VC-CMV cycled? | Volume and HPL (high pressure limit) cycled |
| How are breaths given in VC-CMV mode? | Machine breaths |
| Describe VC-CMV mode | Sensitivity set so patient cannot breathe over the vent (cannot take more than set breaths) |
| What does VC-AC stand for? | Volume Control - Assist Control |
| How is VC-CV triggered? | Time, pressure, and flow triggered |
| How is VC-AC cycled? | Volume and HPL cycled |
| How are breaths given in VC-AC mode? | Machine and assisted breaths |
| Describe VC-AC mode | Sensitivity is set so patient can initiate breaths between set breaths - all breaths (whether set or patient) get set VT |
| What does VC-SIMV stand for? | Volume Control - Synchronized Intermittent Mandatory Ventilation |
| How is VC-SIMV mode triggered? | Time, pressure, and flow triggered |
| How is VC-SIMV mode cycled? | Volume, HPL, and flow cycled |
| How are breaths given in VC-SIMV mode? | Machine and spontaneous breaths |
| Describe VC-SIMV mode | Sensitivity set so patient can initiate breaths between set breaths, set breaths get set VT and patient breaths generate their own VT |
| What does PC-CMV stand for? | Pressure Control - Controlled Mandatory Ventilation |
| How is PC-CMV mode triggered? | Time triggered |
| How is PC-CMV mode cycled? | Time and HVL (high volume limit) cycled |
| How are breaths given in PC-CMV mode? | Machine breaths |
| Describe PC-CMV mode | Sensitivity set so patient cannot breath over the vent, cannot take more than set breaths |
| What does PC-AC stand for? | Pressure Control - Assist Control |
| How is PC-AC mode triggered? | Time, pressure, and flow triggered |
| How is PC-AC mode cycled? | Time and HVL cycled |
| How are breaths given in PC-AC mode? | Machine and assisted breaths |
| Describe PC-AC mode | Sensitivity set so patient can initiate breaths between set breaths; all breaths (whether set or patient) get set PIP for set time |
| What does PC-SIMV stand for? | Pressure Control - Synchronized Intermittent Mandatory Ventilation |
| How is PC-SIMV mode triggered? | Time, pressure, and flow triggered |
| How is PC-SIMV mode cycled? | Time, HVL, and flow cycled |
| How are breaths given in PC-SIMV mode? | Machine and spontaneous breaths |
| Describe PC-SIMV mode | Sensitivity set so patient can initiate breaths between set breaths; set breaths get set PIP and patient breaths generate their own PIP |
| What does CPAP stand for? | Continuous Positive Airway Pressure |
| How is CPAP triggered? | Pressure and flow triggered |
| How is CPAP cycled? | Flow cycled |
| How are breaths given in CPAP? | Spontaneous breaths |
| Describe CPAP | Set positive pressure applied during inspiration and expiration |
| What are the benefits of CPAP? | Increased FRC, decreased pressure needed for alveolar inflation, decreased WOB, less FiO2 to achieve adequate PaO2, most therapeutic for hypoxemia secondary to intrapulmonary shunting, increased cL, keeps alveoli stable |
| What does PS stand for? | Pressure Support Ventilation |
| How is PS mode triggered? | Pressure and flow triggered |
| How is PS mode cycled? | Flow cycled |
| How are breaths given in PS mode? | Spontaneous breaths |
| Describe PS mode | Set pressure delivered and held through inspiration |
| What are the indications for PS mode? | Decreased spontaneous VT (<5mL/kg of their IBW), Increased RR (>25-30), Increased WOB ( accessory muscle use, fatigue, increased vitals, diaphoresis, decreased SpO2) |