![]() 131 cases were excluded, because no clear assignment of clinical data to the defibrillators data was possible. The physician-based emergency medical service (EMS) in the district of Osnabrück provides services to a population of 508,333.Ī total of 604 resuscitations were performed during the study period, and 292 patients were included in the study (group 1: 95 group 2: 94 group 3: 103), so all case numbers calculated in the power analysis could be achieved. The study included all out-of-hospital cardiac arrests occurring in persons who were 18 years of age or older that occurred in the district of Osnabrück (Germany) from January 2016 until March 2018. The patients were observed for follow up and short time survival until hospital admission. After reaching the case number for each individual group previous calculated in the sample size calculation, the next study phase (group) and thus the next intervention were started. In the second group, the feedback sensor was used to measure the compression depth, without offering any real-time feedback (group 2, sensor-only CPR) and in the third study group, the emergency medical staff received audiovisual real-time feedback about the quality of compression (group 3, sensor-feedback CPR). ![]() Pauses in compression and compression frequency were analysed on the basis of electrocardiography (ECG) artefacts. The first study group performed conventional resuscitation (group 1, no-sensor CPR) without use of a feedback sensor. This prospective cohort study consisted of three consecutive study groups. All ongoing and related trials for this intervention are registered. In this control group the patients received standard of care, so no specific intervention or treatment were performed. Patient’s recruitment of the control group started on 20 January 2016. High quality cpr pauses in compression registration#The study was also registered with the International Clinical Trials Registry Platform of the World Health Organisation (WHO) and with the German Registry of Clinical Trials (DRKS00009903) (date of application for registration 15 January 2016 date of final registration: 09 February 2016). The study was approved by the ethics committees of the regional medical councils ( Ärztekammer Westfalen-Lippe (positive vote on 07 December 2015) and Ärztekammer Niedersachsen (positive vote on 12 January 2016)), file no. This present prospective cohort study aimed to analyse whether chest compression quality changes when a real-time feedback system is used in out-of-hospital cardiac arrest. In the current guidelines (2015), real-time feedback systems are mentioned as part of ‘comprehensive CPR quality improvement initiatives’, but due to a lack of data no explicit recommendations are given on the routine use of real-time feedback devices in clinical practice. To improve the quality of chest compression, real-time feedback systems were introduced in order to support emergency medical staff in providing chest compression in conformity with the guidelines. ![]() However, many studies show that chest compression is often carried out poorly in clinical practice, and long interruptions in compression are observed. The current guidelines underline the importance of the quality of chest compression in particular, minimal interruptions, an appropriate depth and frequency of compressions are highlighted. ![]() High-quality chest compression during cardiopulmonary resuscitation (CPR) is one of the most important parameters for a good outcome after cardiac arrest. ![]()
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