Evidence map›Paper›PMID 36167951›Full record

Observational studyNeurocritical care2023

Time Course and Clinical Significance of Hematoma Expansion in Moderate-to-Severe Traumatic Brain Injury: An Observational Cohort Study.

Alexander Fletcher-Sandersjöö, Charles Tatter, Jonathan Tjerkaski, Jiri Bartek, Marc Maegele, David W Nelson, Mikael Svensson, Eric Peter Thelin, Bo-Michael Bellander

Registry-linked trialOpen access · hybridAbstract readObservational Study
In one paragraph

Observational study in Neurocritical care, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07338383 (An Efficacy and Feasibility Trial of a Portable Near Infra-Red Hematoma Imager for Detection of Intracranial Hemorrhage in the Acute Care Setting), which is not on this map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
2.7field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT07338383 not yet recruitingnot on this mapstarted 2026, after this paper: background citation

An Efficacy and Feasibility Trial of a Portable Near Infra-Red Hematoma Imager for Detection of Intracranial Hemorrhage in the Acute Care Setting

TypeobservationalSponsorThe Geneva FoundationRan2026 to 2027Enrolled80ConditionsTraumatic Brain Injury, Intracranial Hemorrhages, Combat Casualty Care, Point of CareArmsNIRD-HI scan at the time of enrollment, Secondary NIRD-HI scan when a planned repeat CT is performed
3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 26 citations in OpenAlex.

  1. Observational
  2. Decompressive craniectomy in traumatic brain injury: insights from a 15-year multicentre cohort in Sweden.Scandinavian journal of trauma, resuscitation and emergency medicine · 2026
    Article
  3. Observational
  4. Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. Efficacy of minimally invasive hematoma evacuation in treating traumatic intracranial hematoma: a retrospective cohort study.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2025
    Article
  10. Article
  11. Article
  12. Observational
  13. Observational
  14. Article
  15. Article
  16. Glibenclamide for Brain Contusions: Contextualizing a Promising Clinical Trial Design that Leverages an Imaging-Based TBI Endotype.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2023
    Review
  17. Observational
  18. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 3 institutions in 4 countries.

Alexander Fletcher-SandersjööDepartment of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden. alexander.fletcher-sandersjoo@ki.se.ORCID 0000-0002-3558-3045
Charles TatterDepartment of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden.
Jonathan TjerkaskiDepartment of Clinical Neuroscience, Karolinska Institutet, Bioclinicum J5:20, 171 64 , Solna, Stockholm, Sweden.
Jiri BartekDepartment of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden.
Marc MaegeleDepartment for Trauma and Orthopedic Surgery, Cologne-Merheim Medical Center, Witten/Herdecke University, Cologne, Germany.
David W NelsonDepartment of Physiology and Pharmacology, Section of Perioperative Medicine and Intensive Care, Karolinska Institutet, Stockholm, Sweden.
Mikael SvenssonDepartment of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden.
Eric Peter Thelin *Department of Clinical Neuroscience, Karolinska Institutet, Bioclinicum J5:20, 171 64 , Solna, Stockholm, Sweden.
Bo-Michael Bellander *Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden.
Karolinska University Hospital · SEKarolinska Institutet · SEWitten/Herdecke University · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPreventing intracranial hematoma expansion has been advertised as a possible treatment opportunity in traumatic brain injury (TBI). However, the time course of hematoma expansion, and whether the expansion affects outcome, remains poorly understood. In light of this, the aim of this study was to use 3D volume rendering to determine how traumatic intracranial hematomas expand over time and evaluate its impact on outcome.

methodsSingle-center, population-based, observational cohort study of adults with moderate-to-severe TBI. Hematoma expansion was defined as the change in hematoma volume from the baseline computed tomography scan until the lesion had stopped progressing. Volumes were calculated by using semiautomated volumetric segmentation. Functional outcome was measured by using the 12 month Glasgow outcome scale (GOS).

resultsIn total, 643 patients were included. The mean baseline hematoma volume was 4.2 ml, and the subsequent mean hematoma expansion was 3.8 ml. Overall, 33% of hematomas had stopped progressing within 3 h, and 94% of hematomas had stopped progressing within 24 h of injury. Contusions expanded significantly more, and for a longer period of time, than extra-axial hematomas. There was a significant dose-response relationship between hematoma expansion and 12 month GOS, even after adjusting for known outcome predictors, with every 1-ml increase in hematoma volume associated with a 6% increased risk of 1-point GOS deduction.

conclusionsHematoma expansion is a driver of unfavorable outcome in TBI, with small changes in hematoma volume also impacting functional outcome. This study also proposes a wider window of opportunity to prevent lesion progression than what has previously been suggested.

Indexed as

Brain Injuries, TraumaticClinical RelevanceAdultCerebral HemorrhageCohort StudiesHematomaHumansHematoma expansionHemorrhage progressionIntracranial hemorrhageLesion progressionProgressive hemorrhagic injuryTraumatic brain injury

Identifiers

PMID36167951
PMCPMC9935722
OpenAlexW4297341039

What OpenQuestion holds

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LicenceCC BY
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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.