The purpose of the study is to examine the effect of telephone assistance and standardized basic life support courses on the quality of cardiopulmonary resuscitation (CPR) and the use of automated external defibrillator (AED). The investigators hypothesize that bystanders can provide compressions in correct frequency and use an AED correctly as well as safely from telephone instructions but that correct and successful ventilations including correct open airway require training on a course.
The study aims at answering the following research questions: 1. How is the quality of CPR and use of AED when performed by an inexperienced bystander who receives telephone assistance compared to the quality when performed by a trained bystander, who has passed a standardized European Resuscitation Council (ERC) course in basic life support (BLS) but does not receive telephone assistance? 2. How is the quality of CPR and use of AED when performed by a trained bystander who has passed a standardized ERC course in BLS and who receives telephone assistance compared to the quality when performed by a trained bystander who does not receive telephone assistance? The questions are sought answered through simulated cardiac arrest scenarios in non-classroom settings. Participants are recruited from ERC courses in BLS. Participants are randomised to one of three groups (stratified for course type using computer-generated randomisation lists with blocks of variable sizes): 1. Cardiac arrest scenario test before BLS course with telephone-assistance. 2. Cardiac arrest scenario test after BLS course, no telephone-assistance. 3. Cardiac arrest scenario test after BLS course with telephone-assistance.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
OTHER
Masking
NONE
Enrollment
153
Participants receive telephone instructions in cardiopulmonary resuscitation (T-CPR) from the Emergency Medical Services in Copenhagen during the cardiac arrest scenario test.
Participants will receive and complete the standardized course in basic life support (BLS) from European Resuscitation Council (ERC).
Student2Student
Copenhagen, Denmark
Compression depth
Keeps a compression depth as recommended by International Liaison Committee on Resuscitation (ILCOR) (5-6 cm) on at least 50 % of compressions (yes/no). Measured by advanced manikin.
Time frame: 8 minutes
Compression rate
Rescuer keeps a compression rate of approximately 100-120 compressions per min. throughout the CPR (yes/no). Measured by advanced manikin.
Time frame: 8 minutes
Shock delivered
Shock delivered with AED (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Hands-of time
Relevant actions of resuscitation within more than 75 % of the test time (yes/no). Measured as no flow time by advanced manikin.
Time frame: 8 minutes
Responsiveness
Shakes AND shouts (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Open airway
Opens or correctly tries to open mouth (chin lift OR jaw thrust) (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Assess breathing
Looks, listens AND feels for normal breathing (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Recoil/lean
Full rise on at least 50 % of all compressions (yes/no). Measured by advanced manikin.
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Time frame: 8 minutes
Rescue breaths
More than 400 mL for at least 50 % of all ventilations (yes/no). Measured by advanced manikin.
Time frame: 8 minutes
Ratio
Acceptable range 28-32:2 (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Activate AED
Activates AED immediately upon arrival (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Attachment of AED pads
Correct attachment of AED pads according to the picture in protocol (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Stand clear
Ensures safety by looking around and verbally announcing delivery of shock (yes/no). Assessed by ERC instructor.
Time frame: 8 minutes
Compression depth 2
Percentage of compressions with a depth within the recommendations from ILCOR (5-6 cm) (%). Measured by advanced manikin.
Time frame: 8 minutes
Compression rate 2
Average rate of compressions (compressions/minute). Measured by advanced manikin.
Time frame: 8 minutes
Rescue breaths 2
Percentage of ventilations with more than 400 mL (%). Measured by advanced manikin.
Time frame: 8 minutes
Time to first compression
Time from scenario start to first compression. Assessed by ERC instructor.
Time frame: 8 minutes
Hand placement
Correct hand placement in at least 50 % of compressions (yes/no). Measured by advanced manikin.
Time frame: 8 minutes