Volume Support (Volume Guaranteed Pressure Support)

Описание: This tutorial is about Volume Guaranteed Pressure Support - known generally as Volume Support (VS). This, I believe, is an underused mode of ventilation in most ICUs - who prefer to use pressure support. Essentially you specify the desired tidal volume and the ventilator alters to pressure support from breath to breath to deliver something akin to that volume. There is little precision, but - as pressure support is biologically variable anyway - the presence of a volume averaged set of tidal breaths is reassuring, particularly if the bedside practitioner is distracted or inexperienced.
In the tutorial I explain how to set up volume support, what it looks like on three different ventilators - Puritan Bennett, Drager Evita and Servo-i and the strengths and limitations.

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Contents:
00:08 Introduction
00:40 Review of Previous Tutorial
01:12 Preview
01:25 Clinical Scenario - Loretta
01:40 Assisted Spontaneous Breathing
02:05 Limitations of Pressure Support
02:30 Volume Support - what it is
03:38 How to Set Up Volume Support - various ventilators
05:44 Why it is essential to set Pmax
05:54 The Pressure Limit
07:10 How it Works - Servo-I
08:05 Cycling to Exhalation
08:45 Volume Guaranteed Pressure Support Waveforms
11:30 Advantages to Using VG-PS (Volume Support)
13:30 Drawbacks to Using VG-PS (VS)
15:00 PS vs VS and Worsening Lung Compliance
18:15 VS vs PS vs TC
19:00 Review of Tutorial and Preview of Next Tutorial (BILEVEL)