Short structured feedback training is equivalent to a mechanical feedback device in two-rescuer BLS: a randomised simulation study.

BACKGROUND Resuscitation guidelines encourage the use of cardiopulmonary resuscitation (CPR) feedback devices implying better outcomes after sudden cardiac arrest. Whether effective continuous feedback could also be given verbally by a second rescuer ("human feedback") has not been investigated yet. We, therefore, compared the effect of human feedback to a CPR feedback device. METHODS In an open, prospective, randomised, controlled trial, we compared CPR performance of three groups of medical students in a two-rescuer scenario. Group "sCPR" was taught standard BLS without continuous feedback, serving as control. Group "mfCPR" was taught BLS with mechanical audio-visual feedback (HeartStart MRx with Q-CPR-Technology™). Group "hfCPR" was taught standard BLS with human feedback. Afterwards, 326 medical students performed two-rescuer BLS on a manikin for 8 min. CPR quality parameters, such as "effective compression ratio" (ECR: compressions with correct hand position, depth and complete decompression multiplied by flow-time fraction), and other compression, ventilation and time-related parameters were assessed for all groups. RESULTS ECR was comparable between the hfCPR and the mfCPR group (0.33 vs. 0.35, p = 0.435). The hfCPR group needed less time until starting chest compressions (2 vs. 8 s, p < 0.001) and showed fewer incorrect decompressions (26 vs. 33 %, p = 0.044). On the other hand, absolute hands-off time was higher in the hfCPR group (67 vs. 60 s, p = 0.021). CONCLUSIONS The quality of CPR with human feedback or by using a mechanical audio-visual feedback device was similar. Further studies should investigate whether extended human feedback training could further increase CPR quality at comparable costs for training.

An assessment of sample surveys as feedback mechanisms for guiding local decision making /

Research supported by U.S. Dept. of Housing and Urban Development, Office of Policy Development and Research.

The genesis of Georges Sorel, an account of his formative period followed by a study of his influence

Photocopy.

The genesis of Georges Sorel, an account of his formative period followed by a study of his influence.

Bibliography: p. 299-312.

Telemaze : a feedback control system for the remote positioning of a distant exploratory vehicle /

"UIUCDCS-R-74-683"

Automatic control; principles of feedback and their application in machine control.

Photocopy (negative)

The analysis and compensation of nonlinear sampled-data feedback systems.

"Research was supported by the United States Air Force through the Air Force Office of Scientific Research, Air Research and Development Command."

Training analysis and feedback aids (TAAF aids) study for live training support /

"Army Project Number 2O665803D730"

Optimal pseudo-derivative-feedback control/

Thesis (M.S.)--Cornell University, Jan., 1975.

The formative era of American law.

Bibliographical footnotes.

An Illinois pavement feedback system : feasibility and system requirements /

"Project IHR-517, Illinois Cooperative Highway Research Program."

Feedback from Illinois Department of Business and Economic Development.

Issues for Mar. 1974- called no. 1-

The making of Pennyslvania; an analysis of the elements of the population and the formative influences that created one of the greatest of the American states,

Mode of access: Internet.

... The formative period in Alabama, 1815-1828,

Bibliography: p. [147]-159.