Public access ventilator – A functional prototype for emergency ventilation by trained layperson

Fuchs, Patricia; Obermeier, Juliane; Kamysek, Svend; Degner, Martin; Nierath, Hannes; Jürß, Henning; Schwarz, Jens; Becker, Martin; Schubert, Jochen K.; Ewald, Hartmut

doi:10.1016/j.resuscitation.2015.09.115

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“…Prospectively, sensor data (flow, pressure, FO 2 , FCO 2 , 3-axis accelerometer) could be used for an adapted feedback algorithm [ 27 ] integrated in a PAV to guide laypersons in an audio-visually controlled way comparable to well-established automatic external defibrillators (AED) with voice instructions [ 3 , 12 ].…”

Section: Discussionmentioning

confidence: 99%

Safety and applicability of a pre-stage public access ventilator for trained laypersons: a proof of principle study

et al. 2017

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BackgroundContemporary resuscitation guidelines for basic life support recommend an immediate onset of cardiac compressions in case of cardiac arrest followed by rescue breaths. Effective ventilation is often omitted due to fear of doing harm and fear of infectious diseases. In order to improve ventilation a pre-stage of an automatic respirator was developed for use by laypersons.MethodsFifty-two healthy volunteers were ventilated by means of a prototype respirator via a full-face mask in a pilot study. The pre-stage public access ventilator (PAV) consisted of a low-cost self-designed turbine, with sensors for differential pressure, flow, FO2, FCO2 and 3-axis acceleration measurement. Sensor outputs were used to control the respirator and to recognize conditions relevant for efficiency of ventilation and patients’ safety. Different respiratory manoeuvres were applied: a) pressure controlled ventilation (PCV), b) PCV with controlled leakage and c) PCV with simulated airway occlusion. Sensor signals were analysed to detect leakage and airway occlusion. Detection based upon sensor signals was compared with evaluation based on clinical observation and additional parameters such as exhaled CO2.ResultsPressure controlled ventilation could be realized in all volunteers. Leakage was recognized with 93.5% sensitivity and 93.5% specificity. Simulated airway occlusion was detected with 91.8% sensitivity and 91.7% specificity.ConclusionThe pre-stage PAV was able to detect potential complications relevant for patients’ safety such as leakage and airway occlusion in a proof of principle study. Prospectively, this device provides a respectable basis for the development of an automatic emergency respirator and may help to improve bystander resuscitation.Electronic supplementary materialThe online version of this article (10.1186/s12873-017-0150-5) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%