Does Bystanders Emotional State Influence Dispatcher-assisted Cardiopulmonary?Resuscitation

Out-Of-Hospital Cardiac Arrest Clinical Trial

Official title:

Does Bystanders Emotional State Influence Dispatcher-assisted Cardiopulmonary Resuscitation?

Clinical Trial Details — Status: Enrolling by invitation

Administrative data

• NCT number: NCT05113706
• Other study ID #: F35150-04
• Status: Enrolling by invitation
• Start date: September 1, 2018
• Est. completion date: March 10, 2022

Study information

• Verified date: February 2022
• Source: Emergency Medical Services, Capital Region, Denmark
• Contact: n/a
• Is FDA regulated: No
• Study type: Observational

Clinical Trial Summary

The study aims to investigate bystanders' emotional stress state in out-of-hospital cardiac arrest (OHCA) emergency calls and the association with the quality of dispatcher-assisted cardiopulmonary resuscitation (DA-CPR).

Description:

Delayed CPR is believed to be an important factor in the outcome of out-of-hospital cardiac arrest (OHCA). Bystanders' emotional stress state might affect recognition of cardiac arrest and the resuscitation attempt. The study aims to investigate the association between a bystander's emotional stress state at the beginning of the emergency call in out-of-hospital cardiac arrest (OHCA) and dispatcher-assisted cardiopulmonary resuscitation (DA-CPR).

Method

The study is a retrospective and observational study of OHCA emergency calls from the capital region of Denmark from 01.09.2018 - 01.11.2019. The audio recordings of the emergency calls will be obtained from the emergency medical service database. A code catalogue with standardised default descriptions to each variable will be used. The study will only include the first person whom the medical dispatcher talk to. The rating of the calls will be performed by five observers outside of the research group, who have no conflict of interest.

The primary outcome of the present study will be to investigate an association between a bystander's emotional stress state in the beginning of the emergency call of OHCA and the time until first chest compression. Secondarily, the study investigated the association between the bystander's emotional stress and:

Outcome variables:

1. Time to recognition of OHCA, time to initiate CPR, and time to first compression.

2. Assessment of OHCA by the medical dispatcher (Does the dispatcher address patient breathing status and consciousness) (Yes/No)

3. The quality of DA-CPR instructions:

1. Was the medical dispatcher motivating and encouraging when giving instructions (Yes/No)

2. Was the medical dispatcher assertive or passive when giving instructions (Yes/No)

3. Did the medical dispatcher instruct on depth and speed of compressions (Yes/No) Information about caller such as gender and relationship to the patient will also be included in the analyse.

Descriptive analysis of baseline characteristics of emergency calls and dispatchers will be performed by frequency distributions (N %) stratified by emotional stress.

Investigators will use logistic regression on categorical variables to analyse differences in the quality of DA-CPR based on the emotional stress state.

Wilcoxon rank-sum test will be used on non-normally distributed continuous variables to analyse differences in time until first chest compression. Two-way ANOVA will be used to analyse the mean of quantitative variables according to the levels of categorical variables. Furthermore, failure analysis was used to analyse and visualise differences in time until chest compressions based on the emotional stress state.

Kappa statistics were used to assess inter-rater variability and agreement between the reviewers. A Kappa score of overall agreement of 0.72% was found, which provides a substantial agreement between the raters.

Recruitment information / eligibility

• Status: Enrolling by invitation
• Enrollment: 1100
• Est. completion date: March 10, 2022
• Est. primary completion date: March 10, 2022
• Gender: All
• Age group: N/A and older

Eligibility

Inclusion Criteria:

• All emergency call recordings involving OHCA in the capital region of Denmark in the time period 01.09.2018 - 01.11.2019

Exclusion Criteria:

• Emergency medical services (EMS)-witnessed OHCA

• Missing emergency call recording

• Caller not physically by patient's site

Related Conditions & MeSH terms

• Emotional Distress
• Heart Arrest
• Out-of-Hospital Cardiac Arrest

Locations

Country	Name	City	State
Denmark	Copenhagen Emergency Medical Services	Copenhagen	Ballerup

Sponsors (1)

Lead Sponsor	Collaborator
Emergency Medical Services, Capital Region, Denmark

Country where clinical trial is conducted

Denmark, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Time to first compression	Time from the emergency call starts to first chest compression	0-15 minutes
Secondary	Time to to recognition of cardiac arrest	Time from the emergency call starts to recognition of cardiac arrest	0-15 minuts
Secondary	Dispatcher encouraging when giving instructions	Was the medical dispatcher motivating and encouraging when giving instructions (Yes/No)	0-15 minuts
Secondary	Dispatcher assertive or passive when giving instructions	Was the medical dispatcher assertive or passive when giving instructions (Yes/No)	0-15 minuts
Secondary	Dispatcher instruct on depth and speed of compressions	Did the medical dispatcher instruct on depth and speed of compressions (Yes/No)	0-15 minuts