[Chest compression quality : Can feedback technology help?].
BACKGROUND
The outcome of cardiopulmonary resuscitation (CPR) depends on the quality of chest compressions. Current European Resuscitation Council (ERC) guidelines promote the development of feedback systems. However, no studies presenting satisfactory results of feedback use have been published.


METHODS
A total of 60 patients with cardiac arrest (> or =18 years of age) received resuscitation attempts using an automated external defibrillator (AED) with real-time feedback by the ambulance service of the City of Münster. The frequency of chest compressions, no-flow time (NFT) and depth of chest compressions were analyzed for the first three cycles of CPR and compared to the ERC guidelines 2005.


RESULTS
Chest compression frequency did not differ significantly from the ideal as set out in the guidelines. Analysis of NFTs showed significantly longer NFT for the first cycle but NFT for the second and third cycles did not differ significantly from the ideal. The target depth of 4-5 cm was achieved in 80% of all chest compressions in the first 3 cycles.


CONCLUSIONS
With the AED real-time feedback technology used in this study standardized performance of chest compressions could be maintained in a professional ambulance service. Implementation of a feedback system requires training of ambulance staff.
Klinik und Poliklinik für Anästhesiologie und operative Intensivmedizin, Universitätsklinikum Münster, Deutschland. lukasr@uni-muenster.de
R P
RP
Lukas
C
C
Sengelhoff
S
S
Döpker
U
U
Harding
P
P
Mertens
N
N
Osada
H
H
Van Aken
T P
TP
Weber
A
A
Bohn
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D016887:Cardiopulmonary Resuscitation / Q000295:instrumentation* / Q000592:standards* / Q000706:statistics & numerical data; D004554:Electric Countershock; D004562:Electrocardiography; D005060:Europe; D005246:Feedback; D005260:Female; D017408:Guidelines as Topic; D006323:Heart Arrest / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged; D015656:Respiratory Mechanics; D012984:Software; D013909:Thorax