Paramedic PapersTopic
Trauma research
72 recent papers on trauma in paramedic and prehospital care, newest first. Each has a plain-English summary, the study design, the main finding and caveat, and what it means for Australian practice.
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Prehospital pulse pressure flags trauma bleeding
A retrospective study of 2,177 adult trauma patients across three Canadian level 1 trauma centres found prehospital pulse pressure predicted active haemorrhage (AUC 0.73), with each 10 mmHg narrowing raising the odds by 51% and a cut-off of ≤45 mmHg most useful for ruling bleeding out.
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HEMS vs road: guideline adherence in trauma
Retrospective analysis of 129,783 severely injured patients in the German TraumaRegister DGU (physician-staffed helicopter and ground services) found HEMS patients, who were younger and more severely injured, had higher rates of guideline-recommended prehospital interventions, such as advanced airway in impaired consciousness (96.5% vs 82.9%) and prehospital chest drains (14.0% vs 5.5%).
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No unique GCS 8 threshold for intubation
A two-era Japan Trauma Data Bank analysis of roughly 138,000 adults found recorded intubation more likely at GCS 8 than 9, but no evidence of a unique risk threshold at that boundary.
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Mass casualty care: slower but no deadlier
A matched German trauma-registry cohort (423 severely injured MCI patients vs 1,692 routine controls) found mass-casualty patients waited longer on scene (85 vs 67 minutes) and received more intubation and tranexamic acid, yet in-hospital mortality was similar (13.5% vs 11.7%).
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Whole blood on ambulances: first two years
The first two years of a prehospital low-titre O-positive whole blood program in Oklahoma (71.6% penetrating trauma) showed significantly improved prehospital vital signs after paramedic transfusion, with improved systolic blood pressure tied to higher survival to hospital arrival.
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HEMS overtriage in burn injuries
Nine-year Dutch HEMS burn cohort found nearly half of physician-staffed helicopter dispatches for burns were cancelled, mostly for minor injuries, and HEMS-specific interventions were performed in only 33.6% of completed missions.
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Doppler beats pulse check after tourniquet
Randomised crossover study of 41 practising paramedics assessing distal circulation after tourniquet application found paramedic-performed Doppler ultrasonography beat pulse palpation on sensitivity (88.9% vs 66.7%) and accuracy (90.2% vs 78.0%) against an assessor-Doppler reference.
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Stable penetrating chest trauma: surgery increasingly avoided
Ten-year retrospective review of 268 haemodynamically stable penetrating chest injuries in Marseille, where non-operative management was attempted in 78% and failed in fewer than 9%, with hospital stay falling from 7.6 to 5.2 days in the recent period.
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Prehospital variables can't pick pelvic binder benefit
Blinded imaging review of 298 CT-confirmed pelvic ring injuries found binder application would be potentially mechanically unfavourable in 56% of cases, and no prehospital variable (hypotension, shock index, mechanism, GCS) discriminated favourable morphology well.
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Italian HEMS trauma mortality predictors
Six-year Italian HEMS cohort of 3,152 transported trauma patients found 3.4% in-hospital mortality, independently predicted by older age, lower Revised Trauma Score, intubation and prehospital CPR — the last two acting mainly as severity markers.
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Prehospital TXA helps fibrinolytic shutdown
Pooled analysis of two prospective prehospital TXA trials found fibrinolytic shutdown carried 14.5% 30-day mortality versus 6.5% with physiological fibrinolysis, and shutdown patients randomised to TXA had about a third the risk of death.
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Updated field triage rules catch nearly all major trauma
A Canadian health-records review of 1,427 patients transported to a level 1 trauma centre found the 2021 US field triage guidelines were highly sensitive (97.3%) but poorly specific (13.3%) for identifying need for trauma centre care.
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Field fluids before ROSC in crush arrests
A single-centre retrospective study of 37 earthquake victims in cardiac arrest after the 2023 Kahramanmaraş earthquakes found ROSC in 27% — exclusively in the 25 patients who received pre-hospital fluids (mean ~1.5 L) — with better pH, lactate, and potassium on arrival.
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NOF fracture care runs on tacit knowledge
Australian exploratory qualitative study running eight online focus groups with 21 registered paramedics on suspected neck of femur fracture care — participants described managing these patients through diagnostic uncertainty, tacit knowledge, peer learning and contextual judgement in the absence of dedicated prehospital guidance, and called for clearer evidence-informed direction covering movement, dignity, communication and analgesia.
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US racial gaps in trauma interventions
US trauma–EMS linked cohort of 18,280 injured adults found Black patients received fewer prehospital airway interventions and intubations than White patients, and patients from disadvantaged neighbourhoods received fewer prehospital interventions overall.
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Violence-related EMS calls: who actually dies
A retrospective registry review of 29,335 violence-related EMS encounters in Istanbul found confirmed prehospital death in only 0.45%, most strongly associated with severe respiratory compromise (aOR 56), altered consciousness (aOR 10.7) and cyanosis (aOR 4.2).
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Prehospital vasopressors in trauma unproven
Systematic review of five retrospective studies (31,849 trauma patients) found prehospital vasopressor infusions before haemorrhage control showed inconsistent mortality associations — one military study found markedly lower adjusted survival and another linked vasopressors to more massive transfusion and coagulopathy — on very-low-certainty evidence.
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Language barriers change trauma assessment
US retrospective analysis of 1,220,982 EMS-attended blunt trauma activations examining whether patient-provider language barriers change prehospital care — the 2% with documented language barriers were more often treated and transported (80.3% vs 75.1%) yet less likely to have pain scores documented (60.6% vs 63.6%), with slightly more GCS 3–8 presentations, showing assessment and documentation patterns shift when clinician and patient can't share a language.
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Prehospital whole blood no mortality benefit
Systematic review and meta-analysis of prehospital whole blood transfusion in traumatic haemorrhagic shock; abstract not yet available (ahead-of-print), so no findings can be reported yet.
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Prehospital minithoracostomy vs chest drain
Retrospective physician-led HEMS cohort (94 trauma patients) comparing prehospital minithoracostomy with chest drainage — minithoracostomy carried no meaningful scene-time penalty and fewer recorded complications, but non-random allocation and few events make it hypothesis-generating only.
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Calcium with prehospital blood products for trauma
Meta-analysis of calcium supplementation during prehospital blood-product trauma resuscitation. Abstract not yet available (ahead-of-print).
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Traumatic arrest in older adults
French national registry study of 5,595 traumatic cardiac arrests comparing older (≥65) with younger adults — older patients achieved ROSC more often (22.5% vs 18.6%) but 30-day survival was lower (0.5% vs 1.2%), leading the authors to argue age alone shouldn't preclude resuscitation though a concurrent medical cause should be sought
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Causal model for prehospital blood trials
Methodology paper building an expert-refined causal model for prehospital blood transfusion trials in traumatic haemorrhagic shock — maps confounders (system times, training, units available) and mediators so future studies can actually isolate a treatment effect against crystalloid
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Whole blood during prolonged entrapment rescue
Case report of an entrapped trauma patient after a motor vehicle collision receiving advanced airway management, finger thoracostomies and multiple units of low-titre O-positive whole blood during a prolonged multi-agency extrication — the blood came via the regional prehospital program supporting a physician response team
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Fluids in traumatic cardiac arrest: rat model
Rat model of traumatic cardiac arrest (30% haemorrhage plus asphyxia) comparing four fluids after ROSC found 96-hour survival of 90% with whole blood, 80% with HES, 60% with lactated Ringer's and just 30% with normal saline — crystalloids prolonged survival without improving haemodynamics.
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Frostbite depth and extent predict amputation
Retrospective cohort of 128 frostbite admissions in eastern Turkey — injury depth drove amputation risk (81.5% of third-degree injuries required amputation vs 1.6% of first/second-degree), and combining degree with %TBSA predicted amputation at admission (AUC 0.948), while inflammatory markers added nothing after adjustment.
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Gelatin and HES impair clot formation ex vivo
Ex vivo human whole-blood model testing graded dilution with gelatin 4%, HES 130/0.42 and a balanced crystalloid — both colloids produced a clearly hypocoagulable ROTEM profile (prolonged clotting and clot formation times, reduced alpha-angle and maximum clot firmness, worst with HES) while the crystalloid alone stayed haemostatically neutral, and combining crystalloid with colloid dilution worsened the coagulopathy further.
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One in five severe trauma cases may need prehospital blood
Multicentre French retrospective study applying the ABC score across four Paris-region prehospital services to estimate demand for prehospital blood — 27 of 139 severe trauma patients (19.7%) met ABC ≥2 with prehospital intervention time >20 min and median total prehospital time of 79 min, only 67% of those eligible received TXA, and 5 arrested prehospital, leading the authors to argue prehospital transfusion should not remain a rarity.
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Consensus criteria for paediatric prehospital transfusion
Modified Delphi consensus guidelines for prehospital blood transfusion in children — abstract not yet available (ahead-of-print).
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LVOT VTI unreliable for mild hypovolaemia
Prospective study measuring LVOT VTI in 63 volunteers before and after donating about 6–7 mL/kg of blood — VTI fell 11.5% on average but with marked inter-individual variability, so it can't reliably flag mild hypovolaemia on its own.
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Admission hypocalcaemia predicts trauma mortality
Multicentre trauma-registry cohort of 977 severely injured patients — admission hypocalcaemia was independently associated with hospital mortality and trauma-induced coagulopathy, while apparently elevated ionised calcium mostly reflected profound acidosis.
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Fentanyl in prehospital RSI for TBI linked to lower mortality
In 423 TBI patients intubated by a Finnish HEMS unit, fentanyl as an anaesthetic adjuvant was associated with lower mortality (OR 0.38), though selection bias can't be excluded.
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Predicting who needs prehospital blood
Retrospective cohort of 25,473 EMS-transported trauma patients in Los Angeles County — of those meeting prehospital blood transfusion criteria, 52% received blood within four hours, with SBP <90 mmHg and HR ≥110 bpm the best predictors of emergent transfusion.
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How GPs decide to respond to trauma alarms
Qualitative interview study of 20 Norwegian primary care doctors on how they decide whether to call out to acute trauma alarms from limited EMCC voice messages — despite the sparse information it remained a decisive factor, with experienced doctors using recognition-primed cues and weighing severity against travel distance and the risk of concurrent incidents.
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Junctional tourniquet harm after pelvic GSW
Case report of a patient with AAJT-S placed prehospital for pelvic gunshot wounds who suffered cardiac arrest upon device removal and developed metabolic acidosis, compartment syndrome, rhabdomyolysis, renal and liver infarcts, pulmonary emboli, and stroke
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Prehospital blood for non-traumatic haemorrhage
Retrospective observational study of prehospital whole blood for non-traumatic haemorrhagic shock across two US systems — GI bleeding (49%) and unspecified shock (43%) were the main indications, vitals improved (HR 102→96, SBP 83→106)
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Safety warning: SPEAR chest decompression device
Safety warning about potential risks with the SPEAR® device marketed for out-of-hospital needle decompression of the chest. Abstract not yet available (ahead-of-print).
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Blunt vs penetrating trauma physiology and outcomes
This Swedish registry of 2,193 trauma patients (353 penetrating) found penetrating trauma patients were younger (median 34 vs 49 years), more often male (78% vs 66%), more frequently in shock on arrival (5.9% vs 2.2%), and more likely to require emergency surgery (53% vs 30%) and early blood transfusion (20% vs 4.5%).
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HART paramedics delivering lyophilised plasma
UK service evaluation of hazardous area response team paramedics delivering lyophilised plasma under a major haemorrhage protocol — 17 patients received 30 units over 12 months with full protocol authorisation, low wastage (3.1%) and no safety incidents.
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Predicting prehospital blood need after MVC trauma
Machine learning models using NEMSIS data achieved strong discrimination (AUC 0.906) for predicting prehospital blood transfusion after motor vehicle trauma, identifying physiologic measures and shock designation as key predictors.
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Whole blood vs components in prehospital trauma
Review compared whole blood versus component therapy for out-of-hospital trauma resuscitation — direct clinical relevance for prehospital blood product protocols.
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Trauma undertriage still high in Tromsø
Retrospective registry study assessing trauma undertriage using ISS ≥16 and NISS ≥16 as reference — found 15% undertriage (above the recommended <5%), with 63% of undertriaged patients meeting national criteria but not receiving trauma team activation, mostly low-energy falls.
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Trauma quality improvement opportunities by cohort
Registry-based cohort study of 8,298 trauma patients found that blunt multisystem cohorts had the highest opportunities-for-improvement rates (10.6% with TBI, 16.9% without) across multiple quality domains including potentially preventable deaths and clinical judgement errors.
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Prehospital NEWS beats shock index in trauma
Systematic review of 22 studies (184 to 1.4M patients) found prehospital NEWS showed excellent discrimination for short-term mortality (AUROC 0.87-0.96) and reliably predicted transfusion needs, outperforming Shock Index.
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Prehospital whole blood improves shock physiology
Systematic review of 13 studies found prehospital whole blood consistently improved shock physiology (greater SI reduction, higher shock reversal rates) and showed potential survival benefit in high-risk and penetrating trauma patients, though overall mortality benefit was not uniform.
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AI trauma triage in LMIC prehospital care
Scoping review mapping AI applications in LMIC prehospital trauma care found ML models achieved AUC 0.91-0.94 for mortality prediction and digital platforms reduced response times from 162 to 13 minutes in Bangladesh.
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Prehospital REBOA: feasibility shown, survival mixed
Systematic review evaluating prehospital REBOA for traumatic cardiac arrest — reports on feasibility, survival outcomes, and complications.
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No mortality benefit for prehospital whole blood
Systematic review and meta-analysis evaluating outcomes of prehospital whole blood transfusion compared to blood component therapy in traumatic haemorrhagic shock.
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Ambulance crews estimate burn size accurately
Study comparing burn size estimates by ambulance crews and referring hospitals against definitive assessment at a specialised burn center — reports accuracy of prehospital burn assessment.
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AI trauma triage model validated in Norway
External validation of AI-based trauma triage model on 29,709 Norwegian trauma patients showed OSISP combined with clinical judgement reduced undertriage from 56% to 2.7% and mortality from 4.1% to 3.4–3.5%.
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Prehospital pelvic binders don't cut transfusion
In this nationwide propensity-matched cohort of patients with blunt pelvic fractures, prehospital pelvic binder use was not associated with reduced 24-hour transfusion requirements or in-hospital mortality, but was associated with a higher rate of pelvic angioembolization.
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Late TXA after trauma: uncertainty
Commentary on the evidence gap around TXA administration beyond 3 hours post-injury.
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Rural head injury care without on-site CT
Patients with closed head injury in this rural emergency department had substantial neuroimaging needs despite the absence of hospital‐based CT.
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ACS response on prehospital spinal motion restriction
Study on: Prehospital Management of Suspected Spinal Cord Injuries: Perspectives from the American College of Surgeons Committee on Trauma. No abstract available for detailed assessment.
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Referral delays, not distance, drive trauma deaths
Prehospital delay and injury severity exhibit a lethal synergistic interaction.
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Tools for assessing trauma team leadership
Leadership is a key non‑technical determinant of trauma team performance and is associated with adherence to protocols and patient outcomes.
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Adrenaline in traumatic cardiac arrest survival
Prehospital epinephrine administration in patients with traumatic cardiac arrest was associated with increased survival to hospital discharge and prehospital ROSC.
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Nordic ICU outcomes in traumatic brain injury
Traumatic brain injury (TBI) is a major cause of death and disability, with large variations in management strategies and outcomes across countries.
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Sex and gender disparities in trauma care
Study on: Need-standardised comparisons must not become a barrier to recognising and addressing sex and gender disparities in major trauma care. No abstract available for detailed assessment.
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Canadian consensus on prehospital transfusion
Consensus summit with 50+ experts developed 12 statements on prehospital transfusion, identifying RBCs and TXA as foundational, recommending freeze-dried plasma and whole blood for rural settings, and emphasising calcium and hypothermia prevention.
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Road injury data systems highly fragmented
They audited global road injury data systems to assess coverage across the Road Injury Chain of Survival, and found extensive fragmentation with few systems linking crash, rescue, prehospital, and hospital data, severely limiting quality improvement opportunities.
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Norwegian trauma criteria: high overtriage
They tested whether Norway's new national trauma criteria accurately predicted ISS>15 injuries and met triage goals, and found overtriage of 81.1% and undertriage of 11.5%, with mechanism of injury criteria showing very poor positive predictive value.
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Prehospital whole blood no better than components
Multicenter randomized trial comparing prehospital type O whole blood resuscitation to standard care in trauma patients with hemorrhage.
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Freeze-dried plasma complements whole blood
This commentary argues freeze-dried plasma complements whole blood in prehospital resuscitation, offering a scalable, shelf-stable solution for rural and remote regions with long transport times.
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Each advanced prehospital intervention adds scene time
Retrospective physician-led HEMS trauma study examining whether more advanced interventions are stretching scene times — each additional intervention increased scene time by 41%, although overall scene times stayed similar over two decades because of changing case mix.
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Call to abandon routine spinal immobilisation
Commentary challenging continued routine spinal immobilisation in suspected spinal injury — the authors argue decades of evidence now consistently show harm without benefit, and that paramedic scope should evolve to reflect current evidence.
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Normal CT safely rules out delayed bleed on anticoagulants
Retrospective review tested whether immediate discharge after normal CT was safe for anticoagulated head-injury patients with GCS 14-15 — no delayed intracranial haemorrhage, neurosurgical intervention, or clinically significant deterioration occurred.
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Finger thoracostomy beats needle decompression in cadavers
Cadaveric crossover study testing needle decompression versus simple thoracostomy for theoretical tension pneumothorax — simple thoracostomy was more successful and faster, but the model limits clinical certainty.
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US statewide protocols for prehospital blood vary
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Quantra sonorheometry rules out trauma coagulopathy
Tested whether Quantra can rapidly detect trauma-induced coagulopathy against standard lab tests, and found early Quantra analysis may reliably exclude TIC, but prospective validation is still needed.
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Bystander care in first minutes of trauma
Concept editorial arguing that the first minutes after injury, before EMS arrival, are a distinct high-risk window where bystander action and dispatcher guidance can prevent deaths, especially through haemorrhage control and airway management.
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Paramedic patella reduction guideline works in Victoria
Retrospective study (n=1,210) evaluating whether Ambulance Victoria's Nov 2022 CPG for paramedic patella reduction changed practice — 91.8% reduction success rate, transport rate dropped 38.4%, case duration cut by ~33 minutes, and IV cannula use down 17.3%, with no change in effective analgesia rates.