I worked in a large Boston ER for several years. Others have touched on it - more serious cases take priority, and time.
The Triage system uses Emergent (needs to be seen right away, like an accident or other life-threatening problem); Urgent (should be seen within 30 minutes); and Non-Urgent (could be a long wait).
Coming in an ambulance doesn’t necessarily get you care faster. It depends on what the problem is. Some people take ambulances regularly and still have to wait.
A lot goes on behind the scenes. Younger doctors have to review their plan of care with attending doctors, who are busy overseeing all cases in the ER at any given time. Tests are ordered, but there may be a wait. Even blood work has a turnaround time. Once they get results back, they then have to work on the plan of care again, which, again, has to be in conjunction with the Attending, etc. Sometimes other specialists are called in, and it takes time for everyone to come together with a plan. (Since these specialists are coming in from elsewhere and doing other things in the hospital.) Documentation is endless, but so important, and takes a lot of time, as well. As all this is happening, new cases are coming in the door every few minutes, and some are going out by either discharge, or admission (and the latter can only happen when hospital beds become available after patients in those are discharged and cleaned, as well as staffed). You never know what’s coming in, either, yet have to deal with everything in seconds, sometimes. Very, very stressful for those in charge and doing the leg work. Especially knowing most people are irritated waiting, lol.
DD has an RN friend who just quit her small hospital ER job because she was given seven or more patients to deal with at a time. She said it was insanity every day.
As a family member and patient myself I have had more than my share of ER waits, too. Many in the same ER I worked at. I always tried to be as understanding as I can. It helps when you have a nurse and/or doctor who keeps you in the loop, but I realize they are dealing with lots of different things at once, so I try not to sweat it. Most of the people we’ve dealt with have been reasonable. I know I was grateful to the Attending in my own hospital who came into my mother’s room within a reasonable time of our arrival to tell my mother they were “going to take care of her” when she broke her hip one day. I was worried they might say she was too old for surgery, and got that sense from some of the nurses, so hearing his words was a big relief. Another night in the ER, with my son when he was 12, a team of surgeons came walking in his room, and it dawned on me that the problem he had may require major surgery, and my stomach dropped. Thankfully they worked out another plan with their infection control team, but surgeons gave their opinions and everyone worked together really well to help DS have a good outcome. I try to keep those moments in mind when waiting and worrying.
If you walk out the door, count your blessings, because some of the people who come in, don’t!