The most established decision support system in emergency care. RETTS is validated through research and continuously developed to meet changes in modern healthcare.


RETTS Online is currently used both in hospital and pre-hospital emergency care and in 80% of the Swedish county councils and 60% of the Norwegian health authorities. We have also expanded the use of our decision support system to more European countries as well as primary care.


The system offers benefits for patients, relatives and healthcare staff – and of course, the healthcare organization.


  • Assists in reducing lead time to first medical assessment

  • Enables faster handling of the most acutely ill

  • The medical information in RETTS Online enables safer handling

  • Makes it easier to give more consistent information about condition and upcoming treatment

  • Can shorten waiting time for treatment

Healthcare Professionals

  • Contributes to increased accuracy and safety in assessment of the patient’s condition

  • Digitally accessible support when deciding what further actions are needed

  • Enables simplified documentation of observations and actions

  • Contributes to reduced stress in assessments through relevant and clear medical information


  • More simple and more accurate prioritisation of the acuity of patients

  • Contributes to shorter lead time to correct diagnostics and remediation

  • Might enable cost reductions through fewer unnecessary enrollments to the hospital

  • Might enable cost reductions through fewer unnecessary samples


  • Since many different organisations within the emergency care chain use RETTS Online it is likely that sharing the same terminology might lead to improved communication between different healthcare providers.

What is RETTS?

RETTS Online (Rapid Emergency Triage and Treatment System) has two main features. The first is to supply information regarding a number of Vital Signs (VS) to assist the caregiver in the initial triage. The second feature is to contribute through the information supplied in the ESS (Emergency Symptoms and Signs) in the caregivers evaluation of acuity. The combination of VS and ESS recommend a priority level for the patient and in what way the patient needs sampling and/or monitoring.

RETTS does not replace qualified employees.

RETTS Online is designed to assist qualified healthcare professionals in delivering fast and accurate emergency care to their patients. As a tool however, RETTS Online will never be better than the organisation it is used by.

RETTS Development

The first user of RETTS was the Emergency and Accident Reception at the Sahlgrenska University Hospital in Gothenburg, which started on January 1, 2005. RETTS was initially developed as a research protocol that was piloted together with other triage systems. RETTS proved to provide sensitivity in finding the most acutely ill but also the least ill patients. A full-scale model was implemented under the working name METTS so that in databases it is not confused with the known Rett syndrome. Since all different parts of the system were merged in 2010, the name RETTS was used in Sweden and Norway. The development of RETTS has been and is taking place in the Nordic network, which annually works with RETTS’s upcoming version.