INTELLiVENT-ASV. Knowledge base

When conducting a manual Spontaneous Breathing Trial by setting the %MinVol to 25% in ASV mode, the alarm ASV: cannot meet target is generated.

How can I perform a spontaneous breathing trial when my patient is being ventilated with ASV®?

This article gives you step-by-step instructions on how to set the ventilator when using the ventilation mode INTELLiVENT-ASV on ARDS patients.

Why can’t the %MinVol (percentage of minute ventilation) increase automatically to more than 200% in INTELLiVENT-ASV?

INTELLiVENT®-ASV® uses partial pressure of end-tidal CO2 (PetCO2) measured by the CO2 sensor as monitoring input for the regulation of ventilation. The measured PetCO2 value is used to track partial CO2 pressure in the arteries (PaCO2).

What are the recommendations for the initial %MinVol settings in Adaptive Support Ventilation (ASV®)?

Our video shows you how to shift the PetCO2 target range in order to reach the PaCO2 targets.

Incorrect positioning of the CO2 mainstream sensor may affect the quality of the signal. When using INTELLiVENT®-ASV®, an unreliable signal may in turn affect the automated adjustments, as these are dependent on the quality index of the signal from the sensor.

It is generally expected that the lowest work of breathing will also generate the lowest force of breathing. Using the same main information, namely alveolar ventilation, airway dead space, and the respiratory time constant, Adaptive Support Ventilation (ASV) aims to find the lowest work of breathing, also taking into account the force of breathing.

How is it possible that my patient monitoring system shows a different value for the saturation of peripheral oxygen (SpO2) than the Hamilton Medical ventilator?

When using the Quick Wean and Spontaneous Breathing Trial (SBT) function, there are several To stop parameters. These can be configured so that the SBT is automatically aborted if certain criteria are not met.

Metabolic acidosis is defined as pH <7.35 and base excess < -2 mmol/l, with standard bicarbonate < 21 mval/l in blood gas analysis. It results from an increase of acids in the blood or a loss of bicarbonate buffers.

A missing signal or incorrect measurement of the SpO2 values may affect the proper functioning of the PEEP and Oxygen controllers in INTELLiVENT®-ASV®.

Oxygen saturation can be assessed by measuring SaO2 or SpO2. SaO2 is the oxygen saturation of arterial blood, while SpO2 is the oxygen saturation as detected by the pulse oximeter.

The flow charts below provide assistance for resolving some of the most common alarms that may occur when ventilating patients in INTELLiVENT-ASV.

How can we best manage a high respiratory drive and low PetCO2 that lead to low pressure support?

The correct use and placement of the sensors is very important, especially when used together with INTELLiVENT®-ASV®.

The Heart-Lung Interaction Index (HLI) is a value for the variation of the plethysmogram amplitude, which reflects how much ventilation interacts with hemodynamics. High variation means high interaction. In the following situations, HLI should not be used or used with caution.

Some patients who are restless when waking may appear to be caused further discomfort by INTELLiVENT-ASV making multiple adjustments, such as increasing %MinVol, PEEP or oxygen. Some users may immediately want to switch to spontaneous mode to avoid this.