Chest compression fraction4/30/2023 ![]() This study is an observational prospective study conducted from Januto September 30, 2019. We hypothesized that there would be no linear correlation between CiT and CCF and that CiT would not differ for resuscitations with high (≥ 80%) and low (< 80%) CCF. We studied the CPR performance of rescuers on scene with a defibrillator capable of capturing compression rate, depth, and CCF along with CiT, with a real-time feedback device. The purpose of this study was to evaluate whether CCF correlates with CiT in OHCA. It is reasonable to consider CiT along with CCF as a CPR metric for EMS education, quality assurance programs, and predictor of survival. The relationship between CCF and CiT remains undetermined. Prior studies looking at the relationship between CCF and patient outcomes have not included CiT in their analyses (11, 12, 13, 14,20, 21, 22, 23). The compressions in target (CiT) is the proportion of chest compressions performed at a rate of 100–120 per minute and a depth of 2.0–2.4 inches. CCF does not account for the proportion of time chest compressions are performed at the recommended rate and depth. The current metric for minimizing interruptions in chest compressions in OHCA is CCF, which is the proportion of time chest compressions are performed during pulselessness in a cardiac arrest resuscitation. Pre-shock pause duration remains a strong predictor of survival (13,19). Studies have found that long pauses exist in CPR when first responders use automated defibrillators, caused by prolonged pre-shock pauses. found that chest compressions were delivered only half of the time during resuscitation for OHCA, and most compressions are too shallow (18). Quality CPR during OHCA has a direct impact on survival and may vary among EMS systems in monitoring, implementation, and quality improvement (17). Compression rate and depth remain associated with OHCA survival outcomes, but studies show conflicting evidence on the relationship of CCF to survival (11, 12, 13, 14, 15, 16). Each year, approximately 350,000 out-of-hospital cardiac arrests (OHCA) occur in the United States with a 60% (8, 9, 10).
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