Hamilton - Common Ventilation Cockpit User Interface
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The Ventilation Cockpit user interface on all Hamilton Medical ventilators is operated in the same way – independent of the device and its use in the ICU, in the MR suite, or during transport. Complex data is integrated into intuitive visualizations.
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Designing a Better User Interface
In recent years, the capabilities of modern ICU ventilators have increased, leading to improved performance. These changes also increased complexity and the amount of data that clinicians need to process. As a result, more and more clinicians ask for more intuitive user interfaces (Richard 2009).
When Hamilton Medical designed the Ventilation Cockpit user interface, our engineers worked in close cooperation with users, ventilation experts, and usability specialists. We identified three important issues that required improvement:
- Because of different operating concepts, switching between different devices is difficult – for example, between a transport ventilator and ICU ventilator.
- Monitored data displayed as numbers and curves is difficult to interpret.
- Assessment of weaning criteria is difficult with conventional monitoring.
The Ventilation Cockpit — Commonality in Interface Design
When designing the Ventilation Cockpit, we looked at parallels in other fields of work: manufacturers of aircrafts aim at providing commonality by using identical cockpits across several airplanes. This allows a qualified pilot to fly any aircraft with the same cockpit at any time – independent of the size of the airplane (Airbus 2014). The results are reduced effort and costs required for training and increased flexibility. Similarly, the Ventilation Cockpit on Hamilton Medical ventilators is operated in the same way – independent of the device and its use in the ICU, in the MR suite, or during transport.
Visualizations
Studies have shown that numerical and waveform displays do not optimally support clinicians. A more helpful alternative provides graphical displays that integrate data into visualizations (Drews 2006). In aircraft cockpits, complex data is integrated and visualized on large screens. The Ventilation Cockpit common to all Hamilton Medical ventilators features similar visualizations.
Dynamic Lung Panel
The Dynamic Lung panel is part of the Ventilation Cockpit. It displays the following important monitoring data in real time:
- Tidal Volume: The Dynamic Lung expands and contracts to show tidal volume in real time. It moves in synchrony with actual breaths, based on the proximal flow sensor signal. The lung size shown is relative to the 'normal' size for the patient’s ideal body weight (IBW).
- Compliance: The Dynamic Lung shows compliance (Cstat) breath by breath relative to “normal” values for the patient’s height. The shape of the lungs changes with compliance. The numeric value is also displayed.
- Patient triggering: The muscle in the Dynamic Lung shows patient triggering.
- Resistance: The bronchial tree in the Dynamic Lung shows resistance breath by breath relative to “normal” values for the patient’s IBW. The numeric value is also displayed. The gray portion of the image shows the relative degree of resistance.
Vent Status Panel
The Vent Status panel displays six parameters related to the patient’s ventilator dependence, including oxygenation, CO2 elimination, and patient activity. A floating indicator moving up and down within the column shows the value for a given parameter. When the indicator is in the light blue weaning zone, a timer starts, showing how long that value has been in the weaning zone. When all values are in the weaning zone, the Vent Status panel is framed in green, indicating that spontaneous breathing trials should be considered. The panel is updated breath by breath.
You can define the weaning zone ranges during configuration of the device to adapt it to the weaning protocol of your institution.
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