This is likely the most important of the four tutorials on Pressure Support Ventilation. As you may recall, PS is an unusual mode of ventilation because it is flow cycled – that is – the ventilator cycles to expiration as specific, user set, percentage of peak flow. The default expiratory sensitivity is usually around 25%. Expiratory dys-synchrony is frequently missed by bedside clinicians who have not been schooled in waveform analysis. This tutorial covers everything you need to know. @ccmtutorialshttp://www.ccmtutorials.org
Next time I am going to commence a series of tutorials on hypoxia-hypoxemia. This will start with a discussion about how we measure hypoxemia – in particular oxyhemoglobin saturation (Tutorial 12). I will then go on to discuss atelectasis, shunt, ventilation-perfusion mismatch and introduce oxygen therapy (Tutorial 13).
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
CCM Tutorials 