Chapter 1 - The Thing That Doesn't Fit
"You don't have to know what's wrong. You just have to know that something changed."
He was talking to me. That was the problem.
A young man, thrown from his motorbike, strapped into full spinal precautions. Stable observations. Chatting. Answering questions. The kind of trauma patient who, on paper, looks like good news.
Next door, the room was on fire.
A multi-trauma had come through the doors at the same time, and the whole emergency department had tilted toward it like water running downhill. Doctors moving between bays. Imaging stretched thin. The team next door preparing to intubate. Every trained eye in the building was pointed at the patient who "looked" like he was dying.
Mine didn't.
So I stayed with him and started my assessment. Nothing unusual. Nothing that made the hair on my neck stand up.
Then he mentioned his chest.
Not dramatically. He wasn't a complainer. He was the stoic type, the kind of patient who apologises for bothering you. He said it hurt. He said he was a little short of breath.
And his oxygen saturations started to slide.
Not a crash. A drift. A number that was a little lower than it had been, and then a little lower again.
I looked at him. He looked uncomfortable. Irritated, almost. But not sick. Not "critically" sick.
And here is where I made my mistake.
The Story in My Head
In that moment, two narratives were fighting for control of my brain.
The first was built on what I was actually seeing: rising chest pain, growing breathlessness, falling saturations. A patient who was changing.
The second was built on what I "thought" I knew: he'd been stable. He was talking. He looked fine. He didn't look like a man with a catastrophic chest injury.
I was new to the role. And I remember the exact thought, clear as a sentence spoken aloud:
"There's no way this is a tension pneumothorax. He's too well."
The second story won.
So I did what seemed reasonable. More analgesia. Oxygen. Watch and wait.
His saturations kept falling.
That's the moment everything turned. Not because I suddenly knew the answer. I didn't. I turned because my discomfort finally outweighed my explanation.
I still couldn't tell you what was wrong. But I could no longer tell myself that nothing was.
The Walk
Here's the part nobody warns you about.
I had to go and find a consultant. Not the consultant looking after my patient, because there wasn't one standing at his bedside. I had to walk to another part of a department in full surge, find someone who didn't even know my patient existed, and interrupt them.
With what?
"Can you come and look at this man, because I'm worried about something I can't explain?"
Think about the weight of that sentence when you're new. When your patient is talking and smiling. When everyone around you is fighting for a life that is visibly slipping away.
That walk is one of the longest in nursing. Every step, your brain offers you an exit. "You'll look foolish. They're busy. He's probably fine. Give it five more minutes."
I made the walk anyway.
The consultant came over. It didn't take long. They saw it almost immediately.
Tension pneumothorax.
The exact thing I had ruled out because he looked too well.
I Got It Wrong First
I want to be clear about what this story is "not".
It's not a story about a brilliant diagnosis. I didn't make one. I did almost the opposite. I saw the possibility, looked it straight in the eye, and talked myself out of it.
What saved that patient wasn't certainty. It was a single piece of information that refused to sit quietly inside the story I'd built.
There were probably twenty signals telling me this was a well trauma patient.
There was one signal telling me something was moving.
And that one signal, the falling saturation, didn't tell me what was wrong. It told me something far more important:
My story might be wrong.
That's the whole game.
Your Brain Is a Pattern Machine, and That's the Problem
Psychologist Daniel Kahneman described two modes of thinking: a fast, automatic, intuitive system, and a slow, deliberate, effortful one. The fast system is what lets an experienced clinician walk into a room and read it in seconds. It is extraordinary. It is also lazy.
The fast system loves a clean story. It takes the first twenty pieces of evidence, builds a narrative, and then quietly edits out anything that doesn't match. Talking patient plus stable obs plus no distress equals "fine". Done. Next.
Patterns are useful. Experience is largely the accumulation of patterns. But the danger arrives the moment the pattern becomes more convincing than the patient in front of you.
In negotiation and risk, there's a name for the thing that breaks the pattern: the "black swan", a term popularised by Nassim Nicholas Taleb. It's the rare, unexpected piece of information that, once uncovered, changes everything. Black swans are rarely loud. They hide inside the ordinary. They look like a stoic patient mentioning, almost apologetically, that his chest hurts.
Your job isn't to predict every black swan. Your job is to notice when something doesn't fit, and to refuse to explain it away.
I call this The Anomaly Rule:
"When nineteen things say "fine" and one thing says "changing," investigate the one."
Not because the one is always right. Sometimes it's nothing. Sometimes there's a perfectly reasonable explanation. But the cost of checking is a few minutes of mild embarrassment. The cost of not checking can be a life.
Snapshot vs. Trajectory
Here's the second trap, and it's closely related.
A snapshot tells you where the patient is right now.
A trajectory tells you where they're heading.
My patient never flipped from "well" to "critically unwell" in a single frame. There was no dramatic moment. There was a slope. Chest pain. Then shortness of breath. Then discomfort. Then a number drifting down, and down again.
No single piece was alarming on its own. Together, they were telling a story, and the story was "change".
Most of us are trained to read snapshots. Is this observation within normal range? Is the patient alert? Is the pain score acceptable? But a number can be technically acceptable and still be moving in exactly the wrong direction.
Ask yourself: Am I reassured by how this patient looks, or by how they're trending?
Those are two very different questions. In emergency nursing, the second one is often the one that matters.
You Don't Need a Diagnosis to Have a Voice
This is the lesson I wish someone had drilled into me on day one.
New nurses often believe, somewhere deep down, that they have to earn the right to be worried. That concern needs a diagnosis attached to it before it's allowed out of your mouth. That walking up to a consultant without an answer is walking up empty-handed.
It isn't.
You are allowed to be worried without knowing why.
You can recognise deterioration without knowing its cause.
Not knowing doesn't mean you have nothing to say. It means you have a "different" thing to say.
Compare these two approaches.
The first requires certainty you may not have:
"I think this patient has a tension pneumothorax."
The second requires only honesty:
"I'm not sure what's causing this, but his saturations are continuing to fall and he's getting more short of breath. He was stable on arrival, and this is a change from how he presented. I'm concerned something is developing."
I call the second one The Concern Statement. Notice what it does:
- It names what's changed, in observable terms.
- It anchors to a baseline, so the listener can see the trajectory.
- It owns the uncertainty upfront, which makes it credible rather than defensive.
- It ends with a clear signal: "I'm concerned."
There's no guessing in it. Nothing to argue with. No diagnosis for a busy senior clinician to dismiss. Just facts, direction and a flag planted in the ground.
That sentence is harder to ignore than a confident wrong answer. And it's infinitely more useful than silence.
You don't have to have solved the problem to recognise that there is one.
Patients Don't Read the Textbook
A patient can be talking to you while something serious builds inside them.
They can be calm. Stoic. Polite. They can tell you they're fine. Their first set of observations can be perfectly reassuring.
And their trajectory can be heading somewhere else entirely.
The stoic patient is especially dangerous, because he's doing your fast-thinking brain a favour. He's handing you reasons to relax. He doesn't want to be a bother, and you don't want to bother anyone either. It's a quiet little agreement that nothing is wrong, and it's one of the most dangerous agreements in healthcare.
What Experience Actually Gives You
When I look back at that nurse, the new one, talking himself out of what he saw, I don't think the biggest difference between him and me is that I now know more diagnoses.
Of course knowledge builds. You see more conditions, more presentations, more strange variations on familiar problems.
But something else happens with time, and it's more valuable.
You get comfortable being uncomfortable.
You start asking, automatically: "Why doesn't this fit?"
You start noticing the small tells:
- The patient who looks slightly different from ten minutes ago.
- The relative who suddenly goes quiet.
- The colleague who hesitates before telling you something.
- The observation that's still "within range" but moving the wrong way.
- The patient who says they're fine but doesn't look it.
None of these hands you an answer. Each one hands you a reason to look again.
That's what experience really gives you. Not certainty.
Permission to be uncertain out loud.
To walk up to someone busy and say: "I don't know what's happening yet, but I don't think we should ignore this."
The Dangerous Moment
The dangerous moment isn't always when the patient becomes obviously sick. By then, everyone can see it.
The dangerous moment comes earlier.
It's when the patient still looks well enough that you can convince yourself everything is fine.
That's the window. That's where the uncomfortable patient lives, and the drifting number, and the answer that doesn't quite make sense, and the nagging feeling that the story you're telling yourself doesn't match the human being in front of you.
You don't have to know what's wrong.
You just have to recognise that something has changed.
Sometimes that's enough to make you look again. And sometimes, looking again is everything.
KEY LESSONS
Trust the thing that doesn't fit. When most of the evidence says "fine" and one piece says "changing," that one piece deserves your attention. Apply The Anomaly Rule: investigate the outlier rather than explaining it away.
Your story is a hypothesis, not a fact. Your fast, pattern-matching brain will build a narrative quickly and then defend it. Treat that narrative as something to be tested, not protected.
Read the trajectory, not just the snapshot. An observation can be within range and still be heading the wrong way. Ask whether you're reassured by how the patient looks or by how they're trending.
Uncertainty is not the same as inaction. You don't need a diagnosis to escalate. Use The Concern Statement: describe what's changed, anchor it to the baseline, own the uncertainty and state clearly that you're concerned.
The stoic patient is not the safe patient. Calm, polite and "fine" can mask real deterioration. Don't let a patient's reluctance to complain become your reason to stop looking.
Make the walk. Escalating to someone busy, without an answer, feels awful. Do it anyway. The mild embarrassment of being wrong costs far less than the alternative.
Questions to Take With You
What's different about this patient compared with when I first saw them?
What information doesn't fit the story I'm currently telling myself?
Am I reassured by how they look, or by how they're trending?
Am I waiting for certainty before I raise a concern?
If my current assumption is wrong, what would I expect to see?
What would make me change my mind?
You don't need all the answers.
Sometimes the most important thing you can do is notice that you have another question.
Chapter 2 - Busy Doesn't Mean Urgent
"The loudest problem in the room is rarely the most important one. And the most important one never stays still."
The radio crackled at 2:40 in the afternoon.
"Two inbound. Rotary wing. Both critical. ETA twenty-two minutes."
I looked at the board. Every resus bay was full. Two patients were waiting on inpatient beds that didn't exist yet. A patient was halfway to CT with a nurse I needed back. A registrar was standing at my elbow asking, for the third time, where his next patient was going. Someone needed the airway trolley restocked. The phone was ringing. Another ambulance was backing into the bay outside.
And in twenty-two minutes, two helicopters were going to land on the roof whether I was ready or not.
There's a particular kind of busy that emergency nurses learn to recognise. It isn't just the number of patients. It's the "noise". Alarms, voices, phones, the rattle of trolleys, the constant low hum of people needing something from you right now.
On days like this, everything feels urgent.
That feeling is a liar.
You Can't Negotiate With a Helicopter
I was the in-charge nurse that shift, which means my job wasn't to look after a patient. My job was to look after the department.
Here's the thing about incoming trauma: it doesn't care about your problems. The helicopter won't circle for ten minutes because you haven't finished cleaning the bay. The patient won't arrive later because your equipment isn't checked. Trauma is the one counterpart in the room that will never, ever meet you halfway.
So your job becomes creating space for what's coming.
Who can move? Who can wait? Which patient can safely go somewhere else? Which bay needs to be turned around? Who can take over? What needs replacing? Who needs a phone call?
The whole department becomes a flow problem. Beds, bodies, staff, equipment, time.
I had a plan. It was a good plan. Move the stable patient out of Resus 2. Push the inpatient transfers. Get the CT nurse back. Clear two bays by the time the rotors were audible.
I had about eighteen minutes of that plan left when it fell apart.
The Patient Nobody Was Worried About
He was in Bay 12, out in the main area.
A man in his thirties who'd come in by ambulance with a nosebleed. One day post-rhinoplasty. Blood-stained gauze taped under his nose, a slightly embarrassed expression, the look of someone who suspects they're wasting your time.
In a trauma department about to receive two critical patients by air, he was, frankly, nobody's priority.
On the board he was a line of text. "Epistaxis, post-op." The kind of presentation you mentally file under "annoying, not dangerous."
He'd been with us about fifteen minutes.
Then one of the nurses said my name. Not loudly. But in a tone I've learned never to ignore.
I looked over.
The gauze was gone. The blood wasn't dripping any more. It was "pouring". Bright red, running over his hands, down his gown, onto the floor. Faster than anyone could hold a bowl under it.
I've worked trauma for a long time. I've seen a lot of blood leave a lot of people. And I remember standing there thinking that this was close to the fastest blood loss I had ever seen.
From a nosebleed.
His heart rate was climbing. Part of that was fear. He was frightened, and fear drives the numbers. But fear wasn't the main event.
He was bleeding out in front of us.
We moved him into resus. The last bay. The one I'd been saving.
"I'm Going to Die"
As we got him onto the bed, he grabbed the rail, looked straight at me and said it.
"I'm going to die."
I've heard those words only a handful of times in my career, and they're never easy to hear. Most of the time, when patients say something like that, it's fear talking. It's the noise, the lights, the strangers in gloves. It's the brain catastrophising in an unfamiliar room.
But every so often, you look at the patient and you realise their fear matches exactly what you're seeing.
This was one of those times.
We were genuinely worried that he might die.
And in that moment, the entire department reorganised itself around one man and his nose.
When the Problem Changes, Everything Changes
We needed to stop the bleeding. That turned out to be far harder than it sounds.
People underestimate epistaxis. Most nosebleeds stop with pressure and patience. This one laughed at pressure. We packed it. It bled through the packing. We tried the next thing, and the thing after that.
Then we got creative. At one point we inflated the balloon of a urinary catheter inside his nasal cavity to try to tamponade the bleed. It's the kind of improvisation you won't find in the glossy brochure for emergency medicine, but you'll find it in plenty of emergency departments at 3pm on a bad day.
It helped. It wasn't enough.
We activated the massive transfusion protocol. Blood started arriving. Blood kept leaving.
He needed theatre. Not soon. Now.
And here's the moment I want you to notice.
Ten minutes earlier, my question had been: "How do I get two critical trauma patients into this department?"
Now my question was: "How do I get this patient to theatre as fast as humanly possible, while keeping the rest of the department alive?"
The trauma patients hadn't disappeared. The helicopters were still coming. I could practically hear the clock. Beds were still blocked. Staff were still stretched.
Nothing had gone away.
The "order" had changed.
The Urgency Trap
There's a strange piece of research on this, and it explains a lot about emergency departments.
In 2018, researchers Meng Zhu, Yang Yang and Christopher Hsee published a study on what they called the "mere urgency effect". In a series of experiments, people consistently chose to do tasks that felt urgent, even when a less urgent task offered an objectively bigger payoff. The time pressure alone was enough to pull their attention. Importance barely got a vote.
Now take that tendency and drop it into a department where alarms are sounding, phones are ringing and a registrar is standing at your elbow.
The doctor asking about a bed feels urgent.
The patient shouting feels urgent.
The ringing phone feels urgent.
The helicopter feels urgent.
Sometimes they are. But your brain doesn't judge urgency by importance. It judges urgency by "volume".
And here's the uncomfortable truth: the man in Bay 12 wasn't loud. He was apologetic. He was a line on a whiteboard. If my attention had stayed locked on the noisiest problems, the helicopters, the transfers, the registrar, I could easily have missed the moment his problem became the only one that mattered.
Busy doesn't mean urgent.
And urgent now doesn't mean urgent in five minutes.
The Mental Map
When I'm in charge, I carry a map of the department in my head.
It isn't written down anywhere. It isn't a formal triage tool. It builds itself as the shift moves.
I know which patients can move and which can't. I know who can wait. I know which nurses have capacity and which are drowning. I know who has the experience for a particular kind of patient. I know which stable patient could slide into a general bay if I suddenly need a resus space.
And I'm updating that map constantly.
I call this The Mental Map, and the best way I can describe it is a jigsaw puzzle. Except you don't know what all the pieces look like. You don't know which piece is arriving next. And every so often, someone picks up the table and shakes it.
That afternoon, someone shook the table hard.
But because I'd been building the map all shift, I didn't have to start from zero. I already knew one of the trauma patients in resus was critical but stable. I already knew that patient could safely move to a general bay. The move I needed was already sitting there, waiting for me to reach for it.
That's the value of the map. It turns a crisis into a set of options you've already half thought through.
Your Risk Appetite Moves With the Room
Here's something textbooks struggle to capture.
The same decision can be safe at 2:30 and unsafe at 2:45.
If the department holds two stable patients and one sick one, I might be comfortable moving a patient out of resus. If I've got three unstable traumas, the exact same decision might be reckless.
Nothing about the individual decision has changed. The context around it has.
That's clinical judgement. And it's why the honest answer in emergency nursing is so often not "Do this," but:
"Given everything happening right now, this is the safest option I can see."
And then you reassess.
Stop Carrying the Whole Department
This is the trap I see catch newer nurses again and again.
You see a problem. You fix it. Another one appears. You take that too. Someone asks for something, you do it. Someone needs a bed, you find it. Someone needs a transfer, you organise it. Someone deteriorates, you stay.
Before long, you're carrying the entire department in your head.
It feels like being good at your job. It's actually the fastest way to get worse at it. Every problem you personally own takes up mental space. More problems, more information, more things you feel responsible for, and less room left to decide what actually matters.
The in-charge role taught me something different. My job isn't to solve every problem. My job is to decide which problems need solving, which can wait, and who is best placed to handle each one.
So that afternoon, I stopped trying to be everywhere.
I pulled a nurse from outside resus to help with the bleeding patient.
I made sure the medical staff knew exactly where he was and how fast things were moving.
I called ICU. And that conversation wasn't "Can you take this patient?" It was a negotiation about speed. We already knew he'd be one-to-one. So instead of waiting for someone to eventually become available, we could work backwards: what has to happen, in what order, for him to move the moment theatre is ready?
Then I found the other in-charge nurse and handed over the incoming trauma. Both helicopters. The whole plan.
I didn't stop caring about those patients. I just stopped holding them in my own two hands. Someone else could carry them better than I could at that moment, because my hands were full.
The Second Set of Eyes
When I hand over a problem like that, I usually lay out what I've already worked out, and then I ask one question:
"Does that sound reasonable?"
It's a small question. It's also one of the most useful tools I have. I call it The Second Set of Eyes.
I'm not asking because I don't know what I'm doing. I'm asking because another person looking at the same puzzle will see pieces I can't. They'll spot the resource I forgot. They'll remember the time something similar went sideways. They'll ask the question that changes the plan.
Notice the framing, too. I'm not asking "What should I do?", which hands them the whole problem. I'm not asking "Is this right?", which invites a yes-or-no rubber stamp. I'm inviting them to test my thinking. It's an open door, and good colleagues walk straight through it.
That day, the other in-charge looked at my plan, nodded, and flagged one thing I'd missed about staffing for the second helicopter. Ten seconds. It mattered.
Emergency departments are rarely saved by one person standing in the middle of the room with all the answers. They're saved by people looking at different pieces of the same puzzle.
Because the uncertainty never goes away. You don't know what the next helicopter will bring. You don't know if the bleeding will stop. You don't know which patient will deteriorate next, or whether another ambulance is about to back into the bay.
You can't eliminate that uncertainty. You can build a team that bends with it instead of breaking.
Urgency Is a Relationship, Not a Label
Here's the idea that changed how I work.
Urgency isn't something a task "has". It isn't a permanent sticker you slap on a patient at triage.
Urgency is a relationship between four things: the problem, the patient, the resources you have, and what happens if you don't act right now.
Change any one of those, and the urgency changes.
The man in Bay 12 didn't become urgent because his diagnosis changed. His diagnosis was the same when he walked in. He became urgent because the rate of bleeding changed, and with it, the consequence of waiting.
Which means prioritisation isn't something you do once, at the start of a shift, and then execute.
It's something you keep doing, over and over.
The patient who was low priority ten minutes ago may be the one you need now. The task that felt critical five minutes ago may be able to wait. The patient you were about to move first might become the one who absolutely cannot move.
And sometimes, the thing that's been eating all your attention isn't the thing that matters most at all.
The Thirty-Second Reset
This is going to sound backwards.
When the department is exploding, the answer is often to slow down.
Not for ten minutes. Not to sit in the tearoom and reflect on your choices. Thirty seconds is enough.
I call it The Thirty-Second Reset. Stand still. Look around. Ask yourself:
- What's changed?
- Who's sickest right now?
- Who can safely move?
- What am I still doing only because it was important five minutes ago?
- What's become more important?
- Who else can help, and what can I hand them?
- What can wait?
That pause feels deeply uncomfortable when every alarm and voice in the room is demanding action. Your whole body wants to "do something".
But those thirty seconds are often the difference between reacting to the department and actually running it. Military strategists talk about getting inside the decision loop: observing, orienting, deciding and acting faster than the situation around you can change. You can't orient while you're sprinting. The reset is where the orienting happens.
The Next Five Minutes
The helicopters landed.
I heard the rotors while we were still packaging our patient for theatre. Blood running through the rapid infuser. The catheter balloon holding just enough. A nurse at his head, talking to him, keeping him with us.
He went up to theatre. The first trauma patient came in through the doors behind him. The second followed a few minutes later, into a bay that had been occupied less than half an hour before.
Nothing about that afternoon went according to my original plan.
That's not a failure. That's emergency nursing.
I've learned not to think too far ahead on days like that. Not because anticipation doesn't matter. It matters enormously. But the plan has to stay loose enough to bend. I'll have a plan for the next ten minutes. Then something changes, and I'll have a new plan for the next five.
The man with the nosebleed didn't arrive as the most complicated patient in the department. He was the least interesting line on the board. The problem evolved, and our priorities evolved with it.
The trauma flow still mattered. The helicopters still mattered. The inpatient transfers still mattered.
They just didn't matter in the same order anymore.
That's the whole point.
Prioritisation isn't deciding what matters. It's deciding what matters most, right now, and being ready to change your mind.
KEY LESSONS
Busy doesn't mean urgent. Noise, volume and pressure pull your attention, but they aren't the same as importance. The quietest patient on the board can become the most critical in minutes.
Urgency is a relationship, not a label. It depends on the problem, the patient, your resources and the consequence of waiting. When any of those shift, re-rank everything.
Build The Mental Map before you need it. Know throughout your shift who can move, who can wait and who has capacity. When the table gets shaken, you'll already have options half-formed.
Let your risk appetite move with the room. A decision that's safe in a quiet department can be unsafe in a chaotic one. Judge decisions in their context, then reassess.
Stop carrying the whole department. Your job isn't to personally solve everything. It's to decide what needs solving, what can wait and who is best placed to handle each piece.
Use The Second Set of Eyes. Lay out your plan and ask, "Does that sound reasonable?" It invites colleagues to test your thinking and catch what you've missed.
Take The Thirty-Second Reset. When everything is demanding action, stop, look and re-prioritise. It's the difference between reacting to the department and managing it.
A Question to Carry With You
When everything feels urgent, don't ask:
"What needs doing?"
Ask:
"What needs doing first?"
Then, a few minutes later, ask it again. The answer may have changed.
You don't become experienced because you can juggle more tasks at once. You become experienced because you get better at recognising which tasks don't need you, which problems can wait, which belong to someone else, and when the whole picture has shifted beneath your feet.
When everything feels urgent:
Slow down.
Look again.
Re-prioritise.
Because what was urgent five minutes ago might not be urgent in five minutes.
And the next piece of the puzzle is probably already on its way.