Recognising Patient Deterioration: SpO₂ 82% Scenario for Student Nurses

🚨 WHAT WOULD YOU DO?

 

“One Last Set of Obs Before Handover…”

You’ve got about 45 minutes left of your night shift. The ward has that quiet, end-of-night feel. You’re just doing your final obs before handover, tying everything up nicely.

You walk into the room. The patient is lying flat and looks settled enough. Nothing immediately jumps out at you. You put the probe on.

SpO₂ 82%.

You pause. Not panic. Just that internal “that’s not right…”

The BP comes up next — 99/64 — but you already know that’s normal for them, so your focus stays on the sats. NEWS2 is sitting at 5, that’s an urgent ward-based response trigger.

 

1. Assess: Look at the patient, not just the screen.

You look back at the patient. This is the bit that matters. Do they actually look like 82%? Are they chatting? A bit breathless? Quiet in a way that feels off? You’re matching the number to the person in front of you.

Then you clock it, they’re lying completely flat.

 

2. Intervene: Sit them up immediately.

You don’t overthink it. You just act. You bring the bed up, sit them upright, give them a second.

The sats climb slightly… 85%. Better, but still not good. And now your thinking sharpens: “Okay… positioning helped, so this is probably real. Something isn’t right here.”

3. Verify: Check the patient, the probe, and the history.

You keep it casual, but you start gathering information while you’re there:

• “Feeling a bit short of breath at all?”
• “Any lung problems like COPD?” There was no COPD history mentioned in the handover.
• “Do you normally use oxygen?”

You’re figuring out what “normal” is for them. At the same time, your hands are doing the quiet checks: Is the probe sitting properly? Good pleth (waveform/trace)? Are their hands freezing cold? Is there oxygen tubing tucked behind the pillow?

You’re also thinking about the small things that can give false readings — poor perfusion, movement or even bright light hitting the probe. Nothing obvious. The reading holds.

The Clinical Why: Oxygen targets aren’t one-size-fits-all. British Thoracic Society (BTS) guidance is clear: most patients aim for 94–98%, but those at risk of hypercapnic respiratory failure (like COPD) usually have a target of 88–92%. “At 85%, this patient is below both target ranges.”

4. Escalate: Clear, direct communication.

This is the point where you stop hesitating. They’re not on oxygen. No history of COPD. The number is holding at 85%. That’s enough.

You step out and escalate it properly. Not rushed, not brushed off: “Bed X — sats were 82%, now 85% after sitting them up. Not on oxygen, no COPD. NEWS2 is 5.”

Clear. Direct. Hard to ignore.

 

5. Respond & Document

There’s no debate about “watching it.” You follow local trust policy for emergency oxygen, starting it now to bridge the gap until the medical review. You stay with them to see the response. The sats begin to climb.

In your head, it’s still ticking over: “Why did they drop?” But that comes after. You document it while it’s fresh:

• The drop to 82%
• The repositioning
• The escalation & oxygen start
• The plan for review

 

The Handover

You don’t soften it or bury it in the middle of a long report:

“Bed X dropped to sats of 82% on final obs. Improved slightly with positioning, but still low at 85%. Not on oxygen, no COPD. Escalated, oxygen started, needs review this morning.”

Short. Clear. Carries weight. This wasn’t just a number on a screen. It was a change you noticed right at the point where it could’ve been missed.

 

 

🏥 Real-World Reflection

This scenario was inspired by a real placement experience involving unexpectedly low oxygen saturations during routine observations.

Initially, the patient appeared to have no documented respiratory history and was not prescribed oxygen therapy. Their oxygen saturations remained persistently low despite repositioning, which led to escalation, oxygen administration and medical review. However, later during visiting hours, a very different picture emerged after speaking with the patient’s relatives.

The patient was actually a very heavy smoker — reportedly smoking at least one pack of cigarettes per day.

Following medical review, the oxygen therapy was stopped and the patient was switched to NEWS2 Scale 2, recognising the likelihood of chronic respiratory adaptation and the need for different oxygen saturation targets.

It was a huge learning moment.

Not because the escalation was wrong, it absolutely wasn’t. Low saturations still required recognition, assessment and escalation. But because it highlighted something incredibly important: Knowing your patient’s history changes how you interpret what you see.

Sometimes important information is:

• undocumented
• forgotten during admission
• minimised by patients
• or only discovered later through relatives or deeper questioning
• And yes, occasionally patients omit information, downplay symptoms or simply don’t realise something is clinically relevant.

That’s why future nurse thinking is not just: “What are the obs?”

It’s also: "What’s the full story behind this patient?”

Understanding smoking history, baseline respiratory function and long-term habits can completely change how observations are interpreted and managed safely.

 

🧠 Bleepbook Takeaway

Don’t ignore the clock: 45 minutes to handover is still enough time for a patient to deteriorate.

Challenge the equipment: If the number looks wrong, check the probe, trace, perfusion and patient position.

Know your triggers: A NEWS2 of 5 is a clear escalation trigger, not something to quietly leave for the next shift.

Be the advocate: You’re not “bothering” anyone. You’re passing on the clinical information needed to keep the patient safe.

 

"Have you ever had a 'near-miss' just before handover? How did you handle the escalation?"

 

Bleepbook Disclaimer:

These scenarios are written to help UK student nurses connect theory to real-world clinical thinking. While based on realistic practice situations, they are educational resources only and should never replace local policy, supervision or professional clinical judgement. Patient conditions can deteriorate quickly and every clinical situation is different. Always follow your Trust guidelines, NICE recommendations and the NMC Code and escalate concerns to your mentor or senior clinician if you are worried about a patient.