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Observational Study
. 2021 Nov 27;25(1):408.
doi: 10.1186/s13054-021-03825-w.

Dispatcher instructions for bystander cardiopulmonary resuscitation and neurologically intact survival after bystander-witnessed out-of-hospital cardiac arrests: a nationwide, population-based observational study

Yoshikazu Goto  1 , Akira Funada  2 , Tetsuo Maeda  3 , Yumiko Goto  4
Affiliations
Observational Study

Dispatcher instructions for bystander cardiopulmonary resuscitation and neurologically intact survival after bystander-witnessed out-of-hospital cardiac arrests: a nationwide, population-based observational study

Yoshikazu Goto et al. Crit Care. .

Abstract

Background: The International Liaison Committee on Resuscitation recommends that dispatchers provide instructions to perform compression-only cardiopulmonary resuscitation (CPR) to callers responding to adults with out-of-hospital cardiac arrest (OHCA). This study aimed to determine the optimal dispatcher-assisted CPR (DA-CPR) instructions for OHCA.

Methods: We analysed the records of 24,947 adult patients (aged ≥ 18 years) who received bystander DA-CPR after bystander-witnessed OHCA. Data were obtained from a prospectively recorded Japanese nationwide Utstein-style database for a 2-year period (2016-2017). Patients were divided into compression-only DA-CPR (n = 22,778) and conventional DA-CPR (with a compression-to-ventilation ratio of 30:2, n = 2169) groups. The primary outcome measure was 1-month neurological intact survival, defined as a cerebral performance category score of 1-2 (CPC 1-2).

Results: The 1-month CPC 1-2 rate was significantly higher in the conventional DA-CPR group than in the compression-only DA-CPR group (before propensity score (PS) matching, 7.5% [162/2169] versus 5.8% [1309/22778], p < 0.01; after PS matching, 7.5% (162/2169) versus 5.7% (123/2169), p < 0.05). Compared with compression-only DA-CPR, conventional DA-CPR was associated with increased odds of 1-month CPC 1-2 (before PS matching, adjusted odds ratio 1.39, 95% confidence interval [CI] 1.14-1.70, p < 0.01; after PS matching, adjusted odds ratio 1.34, 95% CI 1.00-1.79, p < 0.05).

Conclusion: Within the limitations of this retrospective observational study, conventional DA-CPR with a compression-to-ventilation ratio of 30:2 was preferable to compression-only DA-CPR as an optimal DA-CPR instruction for coaching callers to perform bystander CPR for adult patients with bystander-witnessed OHCAs.

Keywords: Dispatcher-assisted cardiopulmonary resuscitation; Epidemiology; Instruction; Out-of-hospital cardiac arrest; Outcome.

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Conflict of interest statement

The authors declare that they have no competing interests.

Figures

Fig. 1
Fig. 1
Flowchart of the patient inclusion criteria. CPR cardiopulmonary resuscitation; DA dispatcher-assisted; EMS emergency medical services
Fig. 2
Fig. 2
Unadjusted 1-month outcomes pre- and post-propensity score matching. CPC cerebral performance category; DA-CPR dispatcher-assisted cardiopulmonary resuscitation; PS propensity score
Fig. 3
Fig. 3
Adjusted odds ratios of conventional DA-CPR for 1-month outcomes. CI confidence interval; CPC cerebral performance category; DA-CPR dispatcher-assisted cardiopulmonary resuscitation; OR odds ratio
See this image and copyright information in PMC

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