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However, there were no significant differences in correct compression depth, mean compression depth, correct hand position, and correctly released compression.
Mean compression depth declines sooner and fewer compressions greater than the recommended minimum depth are delivered with Hands-Only CPR than with 30:2 CPR.
However, there were no significant differences for correct compression depth, mean compression depth (mm), correct hand position and correctly released compression.
In an observational study of adult cardiac resuscitation [ 22], the investigator demonstrated that successful defibrillation was associated with shorter preshock pause and higher mean compression depth.
Differences of five compressions/min and 5 mm in mean compression depth between the two methods were selected as minimum clinically significant values.
The additional decrement in mean compression depth associated with prolonged performance of Hands-Only CPR in this study was only 2.8 mm; but, the percentage of compressions with depths of at least 38 mm (the minimal recommended depth in adult victims) delivered during Hands-Only CPR was significantly less than those delivered during 30:2 CPR.
Similar(54)
In both types of CPR, average compression depth decreased significantly (F 1,16) = 27.7, p <.0001; η2 = 0.99) from early (mean ± SE, 43 ± 2 mm) to end of CPR administration (38 ± 3 mm).
We measured the mean compression rate, compression depth, "duty cycle" and the percentage of compressions completely released using the Laerdal PC Skill Reporting System (Version 2.4.1, Laerdal Medical GmbH).
We furthermore report the percent of students whose mean chest compression depth and rate was within the ERC recommended ranges.
This information was processed by the Philips Q-CPR software program, which displays a graphical and tabular summary of CPR processes to determine the minute-by-minute chest compression rate, chest compression fraction, ventilation rate, mean chest compression depth, and proportion of chest compressions with incomplete release.
4 6 Oh et al found that metronome use increased the mean compression rate (MCR) to the desired value, but compression depth decreased because of the requirement to multitask (CPR technique and audio perception of audio tones).
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average compression depth
median compression depth
mean canopy depth
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mean contig depth
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mean compression stress
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mean ocean depth
mean snow depth
mean pedigree depth
mean coverage depth
mean dive depth
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mean penetration depth
mean compression rate
mean compression modulus
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