Tutorial 4 – Cycling The Mechanical Ventilator – Available Now

This is the last tutorial in the introductory module – “setting up a mechanical ventilator.” In this tutorial I will discuss how the ventilator cycles from inspiration to expiration. In controlled modes this is usually time cycling. However, traditionally volume cycling of volume control was used. On occasion the ventilator pressure cycles – and you must be aware of this as it may cause problems. Finally I will introduce the concept of flow cycling: it is imperative that you understand this process if you use pressure support ventilation. I guarantee you will learn something in this tutorial.

Next week we will be moving on to Volume Controlled Ventilation – specifically Volume Assist Control.

Plan For Upcoming Tutorials (Available Wednesdays – 09.00 GMT)

[These Dates are Subject to Change as the Course Progresses – I will try to keep this list updated].

March 1st 2023
Tutorial 5: Volume Assist Control Ventilation

March 8th 2023
Tutorial 6: Synchronized Intermittent Mandatory Ventilation

March 15th 2023
Tutorial 7: Understanding Ventilation & CO2 Clearance

March 22nd 2023
End Tidal CO2 – Everything You Need to Know

March 29th 2023
Tutorial 8: Pressure Support Part 1 – Triggering the Breath

April 5th 2023
Tutorial 9: Pressure Support Part 2: Controlling the Initial Flow (the rise time)

April 12th 2023
Tutorial 10: Pressure Support Part 3: Setting the Pressure Support Level

April 19th 2023
Tutorial 11: Pressure Support Part 4: Controlling Exhalation (the EXPsens)

April 26th 2023
Tutorial 12: Identifying and Quantifying Hypoxemia

May 3rd 2023
Tutorial 13: Mechanisms of Hypoxemia Part 1

May 10th 2023
Tutorial 14: Mechanisms of Hypoxemia Part 2, Introduction the Oxygen Therapy & Hyperoxia

May 17th 2023
Tutorial 15: Oxygen Therapy

May 24th 2023
Tutorial 16: Why Low Lung Volumes are Bad

May 31st 2023
Tutorial 17: CPAP and PEEP

June 7th 2023
Tutorial 18: Non Invasive Ventilation

June 14th 2023
Tutorial 19: Pressure Controlled Ventilation – Part 1 Assist Control

June 21st 2023
Tutorial 20: Pressure Controlled Ventilation – Part 2 Volume Guaranteed Pressure Control

June 28th 2023
Tutorial 21: Pressure Controlled Ventilation – Part 3 BiLevel Pressure Control and APRV

July 5th 2023
Tutorial 22: How To Read A Blood Gas – Part 1 – Carbon Dioxide

July 12th 2023
Tutorial 23: How To Read A Blood Gas – Part 2 – Metabolic Disorders

July 19th 2023
Tutorial 24: The Patient with High Airway Pressures – Part 1 – Airway Pressure Monitoring and Flow Volume Loops

July 26th 2023
Tutorial 25: The Patient with High Airway Pressures – Part 2 – Treating the Problem

August 2nd 2023
Tutorial 23: The Patient is Fighting the Ventilator – Part 1

August 9th 2023
Tutorial 24: The Patient is Fighting the Ventilator – Part 2

August 16th 2023
Tutorial 25: ARDS – Part 1 – Understanding the Disease

August 23rd 2023
Tutorial 26: ARDS – Part 2 – Treating the Patient with ARDS

August 30th 2023
Tutorial 27: Pulmonary Edema

September 6th 2023
Tutorial 28: Pulmonary Embolism

September 13th 2023
Tutorial 29: Ventilator Weaning and Liberation

September 20th 2023
Tutorial 30: Tracheostomy

Mechanical Ventilation Tutorial 3 TRIGGERING

How does the ventilator know that it needs to deliver a breath? The term to describe this is “Triggering.” In this tutorial I will cover time triggering, pressure triggering and the relentlessly confusing concept of flow triggering. I guarantee that you will learn something in this 12.5 minute tutorial.

Mechanical Ventilation – Setting Up a Ventilator – Flow Patterns

Most bedside practitioners pay little attention to ventilator waveforms – usually just the tidal volume and, occasionally, the pressure waveform. However, mechanical ventilation is all about flow – if there is no flow there is no breath. In this tutorial I will look at flow patterns in patients attached to a ventilator. Patients who breathe spontaneously, without assistance, draw flow from the ventilator, the positive flow in inspiration is hemispheric in appearance, exhalation is a v shape – reflecting elastic recoil. Volume controlled ventilation may be delivered by either constant or decelerating flow, with or without an inspiratory hold (also known as a pause). The flow pattern in pressure control is always decelerating – as airway pressure rises, flow falls. Tidal volumes are variable in pressure control, as the negative pressure deflection during inspiration increases the inspiratory ramp and and hence the tidal volume.

I guarantee you will learn something from this tutorial and will never look at a ventilator the same way again.

Mechanical Ventilation – Control

As promised – here is the first tutorial from Module 1 (“Setting Up a Mechanical Ventilator”) of the course on Mechanical Ventilation. I discuss the difference between Volume Control and Pressure Control and Dual Control – including the advantages and disadvantages associated with each mode.

Module 1 Tutorial 1 of the Mechanical Ventilation Course

New Tutorial Every Wednesday,