Decision making sounds like a slightly academic, niche topic… but in reality, it sits underneath every single thing we do in emergency and pre-hospital care. Every patient contact, every test we order, every treatment we start and every one we choose not to – is a decision made in an environment that is time critical, information-light and full of uncertainty.

In this episode we take a step back and look at how we actually make decisions at the front door and on the roadside. We talk about why the importance of the decision really matters, not just whether a diagnosis is possible, but how severe it is, how common it is, and whether finding it will genuinely change what we do for the patient. We explore pre-test probability and prevalence, and why knowing how often a condition really occurs in the group of patients in front of you is one of the most powerful tools in emergency medicine.

We then move into testing. What actually counts as a test? It's not just bloods, scans and ECGs. It's how someone looks, how they move, what hurts when you examine them and how the story fits together. From there, we build into likelihood ratios and Bayesian thinking; how a piece of information should genuinely shift your estimate of risk, rather than just making you feel more or less comfortable.

We also tackle test and treatment thresholds; the idea that there are times when we should stop chasing a diagnosis, and times when the probability is high enough that we should treat without waiting for more tests. Finally, we bring all of this back to real life, with human factors, competing priorities and the reality that sometimes the technically "correct" decision isn't the best decision in that moment.

This one is all about becoming more comfortable with uncertainty and making better decisions because of it.

Once again we'd love to hear any thoughts or feedback either on the website or via X @TheResusRoom!

Simon, Rob & James