A piece in the British Medical Journal uses the Lucy Letby case to examine how clinical certainty can harden into error — and what that means for patient safety.
The British Medical Journal has published a commentary exploring one of medicine’s most uncomfortable truths: that a doctor’s confidence in a diagnosis can sometimes be the very thing that leads them astray. The piece, written by John Launer, uses the high-profile case of convicted nurse Lucy Letby as a starting point for a broader discussion about the nature of certainty in clinical decision-making.
Launer’s central argument is direct. “One’s certainties on any matter can become sticky,” he writes. “Many of us will have had experiences with clinical cases, where a particular diagnosis seems obvious until it turns out to be obviously wrong.” It’s a candid observation — and one that will resonate with anyone who has ever been told, with complete confidence, something that later proved to be incorrect.
Launer’s commentary uses the case as a lens through which to examine how certainty — in any direction — can calcify in ways that distort clinical judgement, while also directly engaging with questions about the medical evidence and the safety of the conviction.
This matters for patients. When a diagnosis feels settled too quickly, alternative explanations can go unexplored. The BMJ has long published work on diagnostic error, and this piece sits within that tradition of encouraging clinicians to hold their conclusions a little more lightly.
For the public, the practical takeaway is straightforward: if you feel a health concern has been dismissed or a diagnosis doesn’t feel right, you are entitled to ask questions, seek a second opinion, or speak to a different clinician. NHS guidance supports patients in doing exactly that.
If you have concerns about your care or a diagnosis, contact your GP surgery in the first instance. NHS 111 is available by phone or online for non-emergency health queries. In an emergency, call 999.
Source: @bmj_latest