TempoLife › Features › Hospitals, emergency care and waiting lists › triage
How the emergency department decides who goes first
The five-level ladder, the target times that go with each colour, why arrival order is irrelevant, and what to do when you get worse in the waiting room.
This page explains how the system works. It is not a diagnosis, it cannot tell you how urgent your own situation is, and it is not a directory: it carries no clinic addresses, opening hours or visiting times, because those change and a wrong one sends you to a closed door. If someone may be seriously ill or injured, call the emergency number — 112 across the region, 113 for medical emergencies in Norway — and if you are unsure, call your country’s advice line rather than deciding from a web page.
What triage is
Triage is a sorting decision made in the first few minutes by a nurse who has not yet diagnosed you and is not trying to. The question is narrow: how long can this person safely wait? Answering it takes a short history, a look, and a set of observations — pulse, blood pressure, breathing rate, oxygen saturation, temperature, level of consciousness, pain score, and a blood glucose if there is any reason to. Out of that comes a level, and the level decides your place in the queue. It is deliberately fast and deliberately cautious: triage over-calls rather than under-calls, because the cost of the two errors is not symmetrical.
The ladder and its target times
The most widely used scheme in Europe is the Manchester Triage System, which sorts into five levels with a colour and a target time each: red immediate, orange within ten minutes, yellow within sixty, green within a hundred and twenty and blue within two hundred and forty. Some departments use the Emergency Severity Index instead, which sorts into five levels too but by predicted resource use as well as acuity. Either way the shape is the same, and the numbers in the table below are targets set by the scheme rather than promises made by the hospital. A department under pressure misses them; the ladder still determines the order.
| Level | Colour | Name | Target time |
|---|---|---|---|
| 1 | Red | Immediate | 0 minutes |
| 2 | Orange | Very urgent | 10 minutes |
| 3 | Yellow | Urgent | 60 minutes |
| 4 | Green | Standard | 120 minutes |
| 5 | Blue | Non-urgent | 240 minutes |
Why the waiting room looks unfair and is not
Two things make an emergency waiting room look badly run when it is not. The first is that the sickest patients are not in it — they went straight through, which is exactly what is supposed to happen and is invisible from a plastic chair. The second is that the queue refills. A patient at the green level is not waiting for the twelve people ahead of them; they are waiting until no orange or yellow patient arrives for long enough, and on a bad evening that gap does not appear for hours. Arrival order has no standing at all. Neither does the severity of the pain you are in, except insofar as it changes the level.
Being re-triaged, and how to ask
Triage is not a single event. Departments re-assess waiting patients at intervals, and any patient whose condition changes should be re-triaged rather than left at their original level. This is the one lever you actually have: if you become worse — new or worsening chest pain, worsening breathlessness, a change in consciousness, a spreading rash, uncontrolled bleeding, or pain that is no longer controlled — go back to the triage desk and say what has changed, specifically and in a sentence. That is not queue-jumping; it is the mechanism working. Saying only that you have been waiting a long time does not change a level, because the length of the wait is not part of the assessment.
What triage does not tell you
A triage level is not a diagnosis, not a prognosis and not a judgement on whether you were right to come. Plenty of level-four patients turn out to have something that needs treating and plenty of level-two patients go home well. The level is a statement about how long it is safe to wait, made on incomplete information within a few minutes of you walking in — which is why it can be revised upward the moment a blood test comes back. The which-door page is about avoiding the queue in the first place; this one is about understanding it once you are in it.
Sources: Manchester Triage Group — the five-level scheme and its target times · Emergency Severity Index — the alternative five-level scheme · checked 2026-09-08
Frequently asked questions
Why did someone who arrived after me get seen first?
Because they were triaged at a higher level. Emergency departments order patients by clinical urgency, not by arrival time, and a patient who arrives with chest pain or a low oxygen saturation goes ahead of everyone below them regardless of who was there first.
What are the five triage levels?
In the Manchester system: red immediate, orange very urgent with a ten-minute target, yellow urgent at sixty minutes, green standard at a hundred and twenty, and blue non-urgent at two hundred and forty. The Emergency Severity Index used in some departments has five levels as well, sorted by acuity and expected resource use.
Can I ask to be re-triaged?
Yes, and you should if something has changed. Go back to the triage desk and describe what is different — new chest pain, worsening breathlessness, a change in alertness, a spreading rash, bleeding that will not stop, pain that is no longer controlled. A changed condition earns a fresh assessment; a long wait on its own does not.
Do the target times mean I will be seen by then?
No. They are the standards the scheme sets, not an entitlement, and a busy department misses them. They tell you how the queue is ordered, which is the useful part.
Related pages
Emergency department, out-of-hours or your own doctor?
Five doors into the same health service, what each is actually for, and the two questions that pick the right one in about ten seconds.
Calling an ambulance: what the dispatcher asks, and why
The questions in the order they come, why you must not hang up, what to do in the minutes before the crew arrives, and when they will send something other than an ambulance.
Stroke, heart attack and sepsis: the conditions with a clock
The three emergencies where the treatment that works expires, the signs that should end the discussion, and why the ambulance beats the car even when the car is faster.
Which emergency department for a child
Where the paediatric emergency care actually is in this region, the age rules that override everything, and the signs that make a child’s illness a same-hour problem.
How published waiting-list figures actually work
Two completely different numbers get called "the waiting time", the published figure is almost never yours, and there are four things that genuinely shorten a wait.
Every country, every number
The hub: emergency and advice numbers for the whole region, the access rules and all the country pages.
The four questions a hospital always asks
Age, weight, what you take and when it started. TempoLife keeps the medicine log, the symptom timeline and the measurements in one place, so the answers exist before anyone asks for them.