Mechanical ventilation is a supportive process in that we are aiming to treat the underlying cause of the patients problem whilst we support their lung function. Hopefully once the underlying problem is solved we can then take the patient off the ventilator.

Very basically then;


Normalise arterial blood gas:

  • Normalise acid base balance
  • Normalise ventilation
  • Normalise oxygenation.

Remove or reduce the patients work of breathing by unloading the respiratory muscles. We need to aim to do this in a synchronised manner.

Indications for ventilation

Type I Respiratory failure- Hypoxeamic failure.

  • Low oxygen status for example caused by:
    • Congestive heart failure
    • ARDS
    • Pulmonary embolism

Type II Respiratory failure- Hypercapnic failure.

  • High carbon dioxide for example caused by:
    • Chronic obstructive airways disease
    • Drugs
    • Neuromuscular disease.

Airway Protection

  • Airway swelling
  • Surgery
  • Trauma
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6 Ways To Be Better With a BVM
Mechanical Ventilation- Physiologic Effects
Anatomy of Adult ETT
Mechanical Ventilation- Terminology
Mechanical Ventilation- Modes of Ventilation I
Mechanical Ventilation- Modes of Ventilation II
Mechanical Ventilation- Pressure/Volume/Flow Loops
Mechanical Ventilation- Peak Pressure and Plateau Pressure
PEEP (Positive End Expiratory Pressure)
Increase the rate or the tidal volume
Ventilation Screen- What do some of those numbers mean?
Phase Variables
I:E ratios and total cycle time.
Why do we ventilate?.
Volume controlled ventilation and compliance.
Lung compliance.
How do I describe how my patient is being ventilated?
Pressure/Volume loop
AC versus SIMV
A-a gradient
Pressure Support
Pressure Support Ventilation Curves
Pressure/Volume/Flow Curves
Ventilator Induced Lung Injury
Trigger, Limit and Cycle
Ventilator Associated Pnuemonia


Originally posted 2015-04-03 07:00:24. Republished by Blog Post Promoter

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One Response to Mechanical Ventilation: Why do we do it? Goals and Indications.

  1. joel simbeye says:

    This article is very good because it is well summarised and understood.

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