Trigger, Limit & Cycle | Mechanical Ventilation | Little Criticos

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Trigger, Limit & Cycle | Mechanical Ventilation | Little Criticos ===========================================================
In this series we discuss Trigger, Limit & Cycle
In part 4 of this series, we discuss the key phase variables that control breath cycle and their graphical representations.
We will try to differentiate patient and machine triggered breaths and how to identify these by looking at the scalars.
We also highlight salient differences between pressure and volume controlled breaths.
#trigger
#limit
#cycle
#mechanicalventilation
Disclaimer
This video provides general information about mechanical ventilation. Patient needs and clinical care settings vary, and the information provided is not intended as medical, diagnostic or treatment advice. Ventilators should be used under the supervision of a qualified licensed medical professional. Consult the manufacturer’s instructions for the particular device you are using and the product information sheet for any drug administered. This subject is complex and evolving. The authors and providers of these videos do not warrant that the information provided is accurate in every respect or complete, and disclaim responsibility for your use and application of the information.

[@sameerahmed4695]

Great

[@LittleCriticos]

Thank you Sameer

[@anuraj42]

What is the difference between limit and control ? Or both are same ?

[@arjunparihar8727]

Utility of cycling ?
Respected sir, you explained that cycle determines end of inspiration and beginning of expiration. But isn't that already set by adjusting Ti ?
What is the utility of setting a cycling variable if I have already set a Ti... expiration being a passive process would automatically begin after end of Ti right ?

[@LittleCriticos]

Hi Arjun.
The variable that determines change from inspiration to expiration is called Cycle. It can be time cycled or flow cycled.
The set Ti as you suggest is the time cycle which is appropriate patient who is completely or partially dependent on ventilator (CMV or SIMV mode).
However, in spontaneously breathing patient who is only on Pressure Support, Ti is better adjusted by the patient himself and setting a mandatory Ti may result in asynchrony. So in such cases flow cycle is preferred.
Hope this answers your query.

[@bamcmedicalltd4226]

hindi ma bnao sir plzz