To evaluate CPR performance, the training mannequin recorded various effectiveness parameters, such as the ratio of ventilation to chest compressions, depth of chest compressions, frequency of compressions, correct head tilt and chin lift, and correct breathing volumes.
Mild surge occurs independently or appears within a deep surge cycle with a frequency close to the Helmholtz resonant frequency of the compression system.
The frequency of chest compressions was 100/min, and the clock was used to keep it constant.
Mathematically this means that acceleration and CD are almost periodic signals, whose fundamental frequency is the mean frequency of the compressions, fcc (Hz).
These records are reviewed to determine various aspects of therapy, such as duration and frequency of chest compressions, number and timing of defibrillations, response to shocks, and the presence and duration of HOI.
The method seems to be sensitive to the frequency of the secondary compression only in presence of many clusters.
Recent clinical studies reporting the high frequency of inadequate chest compression depth (<38 mm) during CPR, have prompted the question if adult human chest characteristics render it difficult to attain the recommended compression depth in certain patients.
The high incidence in the elbow may be linked to the frequency of ulnar nerve compression, which is a strong indication for surgery.
In both reports, the mean frequency of external chest compression did not result in a pattern relative to the level of gravity exposure in either male or female subjects (Dalmarco et al., 2006; Kordi et al., 2012).
Firstly, a parameter was introduced to estimate the proportion of artifact from PSD of ECG signal with the use of compression frequency as reference.
