The University of Kansas Respiratory Care Education
900C Review for the Lab Practicum
Describe the three servo loops.
How do you check for a leak?
What minute volume would you set if you want a tidal volume of 300 ml and a rate of 20?
Calculate inspiratory time, I:E ratio, and peak flow.
Inspiratory time = (IT% + PT%)TCT based on BPM
I:E Ratio =ET%/ ( IT% + PT%)
Peak flow = factor x min vol.
How do you increase the peak flow?
Calculate new min vol.
New min vol = desired peak flow/ factor
Calculate new BPM.
New BPM = New Min Vol / original tidal volume
Set SIMV Rate
Change to SIMV mode.
Increase min vol
Calculate the volume added by a continuous flow aerosol treatment.
Change LPM to ml/sec
Added volume = flow in ml/sec x inspiratory time in seconds. Do not include Pause Time %.
What else needs to be added to the circuit before giving an in-line aerosol treatment?
What affect might an in-line continuous aerosol treatment have on the ability of the patient to trigger pressure supported breaths?
You will need to turn the Concha Therm humidifier off during the treatment since it will overheat. The continuous cold flow past the proximal airway temperature probe will signal the Concha Therm to increase heater temperature. This is probably true for any servo-controlled heated humidifier.
The High Expired Min Volume Alarm may activate and will read inaccurately.
How do you measure Auto-PEEP?
How do you set the High Expired Min Ventilation Alarm to warn of a 1:1 ratio in Volume control?
Calculate IT in seconds.
In a 1:1 ratio, IT = ET so double IT to find new TCT.
New rate = 60/ new TCT
New Expired Min Vol = New Rate x original tidal volume