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06:04
Ultrasonographic Assessment During Cardiopulmonary Resuscitation
Published on: October 24, 2020
Time to first compression using Medical Priority Dispatch System compression-first dispatcher-assisted
Lee M Van Vleet1, Michael W Hubble
1Wake County EMS, Raleigh, North Carolina 27601, USA. lee.vanvleet@co.wake.nc.us
Prehospital Emergency Care
|December 14, 2011
Summary
Dispatcher-assisted cardiopulmonary resuscitation (D-CPR) protocols were updated, but time to first compression (TTFC) remained around 240 seconds. Continued efforts are needed to improve TTFC for better cardiac arrest survival.
Area of Science:
- Emergency medical services
- Cardiopulmonary resuscitation
- Public health
Background:
- Bystander cardiopulmonary resuscitation (CPR) is crucial for cardiac arrest survival, with survival decreasing significantly with delayed defibrillation.
- Dispatcher-assisted CPR (D-CPR) improves bystander CPR rates and survival.
- The Medical Priority Dispatch System (MPDS) updated protocols to a compression-first approach, removing mouth-to-mouth ventilation (MTMV) and pulse check instructions.
Purpose of the Study:
- To quantify the time to first compression (TTFC) for MPDS versions 11.2, 11.3, and 12.0.
- To evaluate the impact of MPDS protocol changes on TTFC in cardiac arrest calls not requiring MTMV.
Main Methods:
- Analysis of audio recordings of D-CPR events from October 2005 to May 2010.
- Calculation of TTFC for eligible cardiac arrest calls.
- Comparison of TTFC across MPDS versions using the Kruskal-Wallis test.
Main Results:
- A total of 519 cardiac arrest calls met the inclusion criteria.
- The mean TTFC across the evaluated MPDS versions was 240 seconds.
- No significant variation in TTFC was observed between MPDS versions 11.2, 11.3, and 12.0 (p = 0.08).
Conclusions:
- MPDS protocol updates, including the removal of pulse checks and MTMV, resulted in a consistent mean TTFC of 240 seconds.
- This TTFC represents an improvement over earlier MPDS versions but is less favorable than some older, non-MPDS protocols.
- Further optimization of D-CPR protocols is essential to reduce TTFC and enhance cardiac arrest survival rates.
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