Livestreaming From Smartphones as a Supplement to Emergency Calls
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 700
- 试验地点
- 1
- 主要终点
- Changed emergency response after adding live video to the emergency call
研究概览
简要总结
The aim of the study is to analyse if live video as a supplement to emergency calls can improve medical dispatchers' situation awareness and enhance the assistance they provide including provision of pre-hospital resources. Focus will also be on evaluating the unconscious patient and improve CPR quality.
The general experience from the medical dispatcher and the person calling the emergency number regarding the feasibility of adding live video will also be analysed.
详细描述
Setting; The study will be conducted in Copenhagen Emergency Medical Services (EMS), which covers a population of approximately 1.84 million people and an area of 2559 km2. In case of an emergency, there is a single emergency phone number (1-1-2) to a call center that identifies the need for police, fire or medical assistance. If the problem is medical, the caller is re-directed to the EMS where medical dispatchers answer, process and respond to the call by activating the appropriate EMS response and delivering medical advice.
In every emergency call, the medical dispatcher starts by asking the caller about the nature of the problem and whether the patient is awake and breathing normally. In case of suspected cardiac arrest, the dispatcher follows a guideline for dispatcher assisted cardiopulmonary resuscitation based on the European Resuscitation Council Guidelines for Resuscitation. The medical dispatchers are specially trained registered nurses or paramedics with experience within emergency care. They all have a basic life support course and advanced course in DA-CPR. Their decision-making process is supported by a criteria-based, nationwide Emergency Medical Dispatch System (Danish Index), which is a validated tool for managing emergency calls for the most urgent cases of emergencies. The instructions in DA-CPR is divided into two depending on whether the bystander have received a basic CPR course (BLS course). If the bystanders have a BLS course they are also instructed in ventilation. Instructions to lay people consist of short commands. E.g., "place the victim in the supine position". All medical dispatcher has a metronome available to support they guidance. The medical dispatcher guide bystander until ambulance arrival.
Methods; When the medical dispatcher receives an emergency call they decide emergency priority level, dispatch vehicle type and competence allocation and guide in CPR as before the study. Afterwards then can add livestreaming to the emergency call. Each medical dispatcher can choose in which emergency call they want to add live video, but they are recommended to do it with all unconscious patients including cardiac arrest after bystander CPR is started.
Technical solution; For livestreaming of video footage the dispatcher sends a text message, asking the caller to give their consent to share stream video from their camera on their smartphone. When the caller confirms consent, the smartphone automatically starts securely transmitting a video live stream from the scene back to the medical dispatcher. When the emergency call is finished the link will be inactivated.
Data collection and outcome; All medical dispatchers will participate. After each emergency call with stream of live video the medical dispatcher fills out a questionnaire about their evaluations of the patient before and after live video, if the live video resulted in changed treatment of the patient, or different response. Emergency priority level, emergency response, date and time for the call and symptom-based criteria from Danish Index (1-39 items) will be collected from the dispatch system Logis CAD and compared with emergency calls without use of live video.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Only
- 时间视角
- Other
入排标准
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Inclusion criteria (stream live video footage) These are assessed by the medical dispatcher before stream of live video footage.
- •Emergency call about an unconscious patient. (The patient is defined as unconscious, if the patient is unresponsive to verbal or pain stimulus according to the Danish Index. (Inclusion criterion in relation to the Danish Index is "unconscious patient with normal breathing. A.01.03", as well as all sub-criteria that meet the above criteria e.g. "A.06.01, Unresolved problem;" Does not respond to call or pain stimulus, but no breathing problems ").
- •Emergency call about suspected cardiac arrest where CPR is provided
- •Emergency call about a patient with trauma/illness where the medical dispatcher thinks it will be a benefit with live video footage
- •Video-capable smartphone present
- •Caller by the patient's side
- •Caller expected age≥ 18 years
- •More than two bystanders present
排除标准
- •If caller, patient or other bystanders do not want livestreaming to be added to the emergency call.
- •No video-capable smartphone present
- •Caller not by the patient's side
- •Caller a child
- •Less than two bystanders present
结局指标
主要结局
Changed emergency response after adding live video to the emergency call
时间窗: From the beginning of the emergency call to the end of the call. Approx. 6-7 minutes
Did the medical dispatcher change emergency response more often after live video was added to the emergency call compared to emergency calls without video.
The medical dispatcher's evaluations of the patient after adding live video footage to the emergency call.
时间窗: From the beginning of the emergency call to the end of the call. Approx. 6-7 minutes
Did the medical dispatcher's evaluation of the patient change because of the live video footage? (ANSWER: Yes, patient more critical ill/ Yes, less critical ill/ or no change) Did the patient suffer another trauma/disease compared to what the medical dispatcher thought before the live video footage? (ANSWER: No/Yes (describe)).
The medical dispatcher's evaluations of the patient's level of consciousness before and after adding live video footage to the emergency call.
时间窗: From the beginning of the emergency call to the end of the call. Approx. 6-7 minutes.
The medical dispatcher evaluate the patient's level of consciousness before and after the live video footage; AVPU scale (an acronym from "alert, verbal, pain, unresponsive") /or inaccessible.
The medical dispatcher's evaluations of the surroundings and bystander response after adding live video footage to the emergency call.
时间窗: From the beginning of the emergency call to the end of the call. Approx. 6-7 minutes.
Did the medical dispatcher situation's awareness regarding the surroundings or bystander response change after video footage? (ANSWER: No/ Yes, Less bystanders present/ Yes, more bystanders present/ Yes, bystander response were more sufficient/ Yes, bystander response were less sufficient/Yes, surroundings were different(describe)/ other (describe)).
Change in the CPR quality (hand position) before the medical dispatcher assist in CPR using the video footage (video-DA-CPR) and after the medical dispatcher has assisted .
时间窗: From the medical dispatcher receive video footage until the end of video-DA-CPR.
Correct hand position before and after video-DA-CPR? (Outcome: yes / no / inaccessible evaluated before and after video-DA-CPR)
Change in emergency level after adding live video footage to the emergency call.
时间窗: Evaluated at the end of the emergency call.
Did the medical dispatcher change emergency priority level because of the live video footage?" (ANSWER: No, Yes (upgrade, downgrade))
Change in the CPR quality (compressions rate) before and after video-DA-CPR.
时间窗: From the medical dispatcher receive video footage until the end of video-DA-CPR.
Correct compressions rate (100-120 compressions/min) before and after video-DA-CPR (Outcome: yes / no / inaccessible evaluated before and after video-DA-CPR)
The medical dispatcher's evaluations of the usefulness of adding live video footage to the emergency call.
时间窗: From the beginning of the emergency call to the end of the call. Approx. 6-7 minutes.
Was the live video footage useful for the medical dispatcher"? (ANSWER: Extremely useful/ very useful/ moderately useful/ slightly useful/ not at all useful).
Change in the CPR quality (compressions depth) before and after video-DA-CPR
时间窗: From the medical dispatcher receive video footage until the end of video-DA-CPR.
Correct compressions depth before and after video-DA-CPR (approximately one third of the anterior-posterior diameter). (Outcome: yes / no / inaccessible evaluated before and after video-DA-CPR)
次要结局
- "Hands-of-time" during CPR(From the medical dispatcher receive video footage until the end of the call. Approx. 5-6 minutes.)
- Shift of persons during CPR(From the medical dispatcher receive video footage until the end of the call. Approx. 5-6 minutes.)
- Bystanders experiance with adding live video to the emergency call(From the person calling 1-1-2 accept transmission of live video until end of the call. Approx. 5-6 minutes.)
- Ventilations performed by bystanders?(From the medical dispatcher receive video footage until the end of video-DA-CPR.)
- Use of AED(From the medical dispatcher receive video footage until the end of the call. Approx. 5-6 minutes.)
- Other aspects of bystander CPR(From the medical dispatcher receive video footage until the end of the call. Approx. 5-6 minutes.)