Five new papers today — here are the top four. Paper one — resuscitative thoracotomy had no survivors beyond ten minutes of traumatic cardiac arrest. Paper two — the evidence for ultrasound confirmation of tube placement on the road is remarkably thin. Paper three — a machine-learning model predicts good neurological recovery after cardiac arrest using variables crews generate. Paper four — teenage drinking is falling, but ambulance call-outs for teen intoxication mostly aren't.

Paper one. Resuscitation, a prospective national service evaluation from the UK — twenty air ambulance services and twenty-six major trauma centres, one hundred and sixteen resuscitative thoracotomies over twelve months, eighty-two of them prehospital. Forty-three per cent achieved return of spontaneous circulation, but only about seven per cent survived to discharge. Survival tracked the underlying cause — patients with cardiac tamponade did far better than those bleeding out. And the headline: no survivors beyond ten minutes of traumatic cardiac arrest. It's a service evaluation without a comparator group, so patient selection drives a lot of the numbers. Thoracotomy isn't an Australian paramedic skill — in the UK model it's largely doctor-delivered — but the ten-minute ceiling and the tamponade-versus-exsanguination split are exactly the kind of thing that shapes how trauma arrests get triaged to major trauma centres here.

Paper two. Internal and Emergency Medicine — a scoping review of point-of-care ultrasound for confirming endotracheal tube placement in prehospital and critical care transport. Fifty-one studies survived screening, from nearly two and a half thousand records. The number that jumps out: only one of those fifty-one actually measured diagnostic performance in adult patients out of hospital. None measured patient-oriented outcomes at all — most were simulation, cadaver, training or feasibility work. The pooled accuracy figures everyone quotes come from emergency departments and intensive care. Ultrasound is in the kit for a number of Australian services but not all, and tube placement is an advanced-scope skill — so if crews are leaning on in-hospital accuracy figures, this review says the on-road evidence just isn't there yet.

Paper three. Resuscitation Plus — a South Korean registry study, one thousand three hundred and fifty-eight comatose survivors of out-of-hospital cardiac arrest. A machine-learning model predicted six-month neurologically intact survival before targeted temperature management even started, with an area under the curve of zero point nine three — comfortably ahead of conventional prognostic scores. About twenty-nine per cent of patients made a good recovery. The interesting part for crews: the strongest predictors were the prehospital initial rhythm, the rhythm on hospital arrival, and total collapse duration — data that starts with good on-road documentation. Caveats — it's a single-country registry from twenty fifteen to twenty eighteen, and it hasn't been externally validated.

Paper four. Journal of Public Health — Australian data this time. Nearly twenty-six thousand ambulance attendances for alcohol intoxication in ten to nineteen year olds in Victoria, tracked from twenty twelve to twenty twenty-three. Teen drinking per the surveys has fallen for years — but attendances stayed largely flat. The only significant decline was a small one, among males in major cities. Regional males, and females of any remoteness — no significant trend. That gap matters: surveys capture drinking behaviour, ambulance data captures the acute harm that actually lands on crews, and they're telling different stories. It's Victorian data only, and it measures presentations rather than drinking — but the Friday-night pattern will be familiar to crews everywhere.

Quick recap. One — no thoracotomy survivors past ten minutes of traumatic arrest, and tamponade does better than exsanguination. Two — just one on-road accuracy study in fifty-one on ultrasound tube confirmation. Three — machine learning predicts good recovery after cardiac arrest, driven by prehospital rhythm and collapse time. Four — teen drinking is down, but alcohol ambulance call-outs for teens are flat.

Also on the dashboard today — AED coverage depends on how responders travel. That's the roundup for Friday the thirtieth of October. Papers on the dashboard. Back tomorrow.