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Work of CPR during two different compression to ventilation ratios with real-time feedback
Amy E Betz1, Clifton W Callaway, David Hostler
1Department of Emergency Medicine, University of Pittsburgh, Pittsburgh, PA 15213, United States.
Resuscitation
|August 8, 2008
Summary
The 30:2 compression to ventilation ratio did not increase physical or perceived exertion during cardiopulmonary resuscitation (CPR) with real-time feedback. Healthcare providers performed more chest compressions per minute with the 30:2 ratio without sacrificing CPR quality.
Area of Science:
- Emergency Medicine
- Cardiology
- Resuscitation Science
Background:
- Current guidelines recommend a 30:2 compression to ventilation ratio for basic life support (BLS).
- Increased physical exertion during CPR may burden providers.
- The impact of different compression-ventilation ratios on provider exertion and CPR quality needs further investigation.
Purpose of the Study:
- To compare cardiopulmonary resuscitation (CPR) performance and perceived exertion between 15:2 and 30:2 compression to ventilation ratios.
- To evaluate the effect of real-time feedback on CPR delivery during two-rescuer CPR.
Main Methods:
- Eighteen BLS-certified healthcare providers performed 5-minute CPR manikin sessions at 15:2 and 30:2 ratios.
- Physiological measures (heart rate, capillary lactate) and perceived exertion (OMNI RPE) were recorded.
- Continuous, automated feedback on compression rate, depth, duration, and release was provided via an accelerometer.
Main Results:
- No significant differences in peak heart rate, capillary lactate, or OMNI RPE were observed between the 15:2 and 30:2 ratios.
- Compression rate and depth remained consistent across both ratios.
- The 30:2 ratio resulted in significantly more total chest compressions and lower no-flow time compared to the 15:2 ratio.
Conclusions:
- A 30:2 compression to ventilation ratio does not increase physical or perceived exertion in healthcare providers during a 5-minute CPR simulation when real-time feedback is used.
- The 30:2 ratio allows for more chest compressions per minute without compromising CPR quality.
- Real-time feedback may mitigate the physical burden associated with higher compression rates.
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