Ambulance and Helicopter Response Times in Danish Emergency Medical Services: Protocol for an Epidemiological Study. The AHRTEMIS Study
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 发起方
- 入组人数
- 2,500,000
- 试验地点
- 1
- 主要终点
- 30-day survival
研究概览
简要总结
The overall aim of this retrospective observational study is to investigate the association of emergency medical services response time with patient survival and treatment outcomes.
The main question it aims to answer is:
What is the association between response time and patient survival?
The investigators will collect data for all patients who were treated by ambulance and/or helicopter services in Denmark and follow the patient's path from illness or injury to discharge from hospital with a focus on the significance of ambulance and helicopter response time.
详细描述
INTRODUCTION Background and rationale Response time, defined as the time from dispatch to arrival of the vehicle at the patient´s address for emergency medical services (EMS) units, may be essential in critical situations such as e.g., cardiac arrest and serious injury. Apart from these conditions, there is currently only limited or even contradictory evidence to support that a short response time is associated with improved patient survival and other treatment parameters. There are other significant factors that affect mortality in the acute phase, such as competence on prehospital care provider level, emergency department patient load and staffing shortages, that have been shown to affect mortality. Confounders such as bidirectional causality and confounding by indication may hinder scientific interpretation of response time importance and significance for patient outcomes in observational studies.
Importance of the study The results of the research project may contribute to establishing a scientific background for when response time matters for the patient and when it does not matter. Thereby, the investigators expect that the results can enable an evidence-based differentiation of ambulance response and degree of urgency and purvey the use of alternate key performance indicators and benchmarking in EMS systems.
Aims of the study This project aims to increase the knowledge about the possible association between response time and survival and treatment outcomes.
The overall aim is to investigate the association of response time with treatment outcomes, including patient survival.
Research questions in the study
研究设计
- 研究类型
- Observational
- 观察模型
- Cohort
- 时间视角
- Retrospective
入排标准
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •Every patient in Denmark in need of ambulance and/or helicopter services treatment in Denmark from 2016-2022 with outgoing response mode A (with lights and sirens) and B (without lights and sirens) is eligible for inclusion in the study.
排除标准
- •No civil personal registration number available
- •Patient not identified
- •Patient not entered in the prehospital electronic patient journal
- •invalid data entered
- •No linkage between substitue personal register number and actual personal register number for patients identified later;
结局指标
主要结局
30-day survival
时间窗: Status at 30 days after hospital admission
Patient is alive 30 days after hospital admission
次要结局
- 24 hour survival(Status at 24 hours after hospital admission)
- 48 hour survival(Status at 48 hours after hospital admission)
- 7-day survival(Status at seven days after hospital admission)
- 90-day survival(Status at 90 days after hospital admission)
- Survival to hospital discharge(Status at hospital discharge, assessed up to 5 days)
研究者
Peter Martin Hansen
MD. PhD student
Odense University Hospital