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Background
Patients with cardiac arrest have lower survival rates, when resuscitation performance is low. In In-hospital settings the first responders on scene are usually nursing staff without rhythm analysing skills. In such cases Automated External Defibrillators (AED) might help guiding resuscitation performance. At the Wuerzburg University Hospital (Germany) an AED-program was initiated in 2007.
Aim of the presented study was to monitor the impact of Automated External Defibrillators on the management of in-hospital cardiac arrest events.
Methods
The data acquisition was part of a continuous quality improvement process of the Wuerzburg University Hospital. For analysing the CPR performance, the chest compression rate (CCR), compression depth (CCD), the no flow fraction (NFF), time interval from AED-activation to the first compression (TtC), the time interval from AED-activation to the first shock (TtS) and the post schock pause (TtCS) were determined by AED captured data. A questionnaire was completed by the first responders.
Results
From 2010 to 2012 there were 359 emergency calls. From these 53 were cardiac arrests with an AED-application. Complete data were available in 46 cases. The TtC was 34 (32–52) seconds (median and IQR).The TtS was 30 (28–32) seconds (median and IQR) . The TtCS was 4 (3–6) seconds (median and IQR) . The CCD was 5.5 ± 1 cm while the CCR was 107 ± 11/min. The NFF was calculated as 41 %.
ROSC was achieved in 21 patients (45 %), 8 patients (17 %) died on scene and 17 patients (37 %) were transferred under ongoing CPR to an Intensive Care Unit (ICU).
Conclusion
The TtS and TtC indicate that there is an AED-user dependent time loss. These time intervals can be markedly reduced, when the user is trained to interrupt the AED’s “chain of advices” by placing the electrode-paddles immediately on the patient’s thorax. At this time the AED switches directly to the analysing mode. Intensive training and adaption of the training contents is needed to optimize the handling of the AED in order to maximize its advantages and to minimize its disadvantages.
The relevance of user experience in safety–critical domains has been questioned and lacks empirical investigation. Based on previous studies examining user experience in consumer technology, we conducted an online survey on positive experiences with interactive technology in acute care. The participants of the study consisted of anaesthesiologists, nurses, and paramedics (N = 55) from three German cities. We report qualitative and quantitative data examining (1) the relevance and notion of user experience, (2) motivational orientations and psychological need satisfaction, and (3) potential correlates of hedonic, eudaimonic, and extrinsic motivations such as affect or meaning. Our findings reveal that eudaimonia was the most salient aspect in these experiences and that the relevance of psychological needs is differently ranked than in experiences with interactive consumer technology. We conclude that user experience should be considered in safety–critical domains, but research needs to develop further tools and methods to address the domain-specific requirements.
Diese Arbeit untersucht den Einfluss der Laryngoskopietechnik (GlideScope® versus Macintosh-Spatel) und des Erfahrungsgrades der intubierenden Person (erfahren versus unerfahren) auf die während der endotrachealen Intubation spontan eingenommene Körperhaltung mittels der Methode des Rapid Entire Body Assessment. Hierzu wurden Videoaufnahmen von in der endotrachealen Intubation erfahrenen Ärzten und darin unerfahrenen Medizinstudierenden während endotrachealen Intubationen am Patientensimulator aufgenommen. Die Benutzung des GlideScope®-Videolaryngoskops war unabhängig vom Erfahrungsgrad mit einer, nach ergonomischen Gesichtspunkten, deutlich vorteilhafteren Körperhaltung und niedrigeren REBA-Aktionsschwellenwerten assoziiert. Unerfahrene Probanden nahmen im Gegensatz zu erfahrenen eine unvorteilhafte, überwiegend gebückte Körperhaltung während der endotrachealen Intubation ein, unabhängig welche der beiden Laryngoskopietechniken benutzt wurde. Aus ergonomischer Sicht sollte die Videolaryngoskopie für die endotracheale Intubation bevorzugt eingesetzt werden.