Evidence map›Paper›PMID 34692855›Full record

ArticleBurns & trauma2021

Heparin resistance in severe thermal injury: A prospective cohort study.

Liam D Cato, Benjamin Bailiff, Joshua Price, Christos Ermogeneous, Jon Hazeldine, William Lester, Gillian Lowe, Christopher Wearn, Jonathan R B Bishop, Janet M Lord and 2 more

Open access · diamondAbstract read
In one paragraph

Article in Burns & trauma, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 17% 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.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

3 citing papers in PubMed, 1 synthesis or guideline pooled it, 12 citations in OpenAlex.

  1. Guideline
  2. Review
  3. 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

12 authors at 4 institutions in 1 country.

Liam D CatoScar Free Foundation Birmingham Centre for Burns Research, University Hospitals Birmingham Foundation Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Birmingham, B15 2WB, UK.
Benjamin BailiffDepartment of Haematology, University Hospitals Birmingham Foundation Trust, Mindelsohn Way, Birmingham, B15 2WB, UK.
Joshua PriceInstitute of Inflammation and Ageing, University of Birmingham, Birmingham, B15 2TT, UK.
Christos ErmogeneousInstitute of Inflammation and Ageing, University of Birmingham, Birmingham, B15 2TT, UK.
Jon HazeldineInstitute of Inflammation and Ageing, University of Birmingham, Birmingham, B15 2TT, UK.
William LesterDepartment of Haematology, University Hospitals Birmingham Foundation Trust, Mindelsohn Way, Birmingham, B15 2WB, UK.
Gillian LoweDepartment of Haematology, University Hospitals Birmingham Foundation Trust, Mindelsohn Way, Birmingham, B15 2WB, UK.
Christopher WearnScar Free Foundation Birmingham Centre for Burns Research, University Hospitals Birmingham Foundation Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Birmingham, B15 2WB, UK.
Jonathan R B BishopNIHR Surgical Reconstruction and Microbiology Research Centre, University Hospitals Birmingham Foundation Trust, Mindelsohn Way, Birmingham, B15 2WB, UK.
Janet M LordScar Free Foundation Birmingham Centre for Burns Research, University Hospitals Birmingham Foundation Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Birmingham, B15 2WB, UK.
Naiem MoiemenScar Free Foundation Birmingham Centre for Burns Research, University Hospitals Birmingham Foundation Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Birmingham, B15 2WB, UK.
Paul HarrisonScar Free Foundation Birmingham Centre for Burns Research, University Hospitals Birmingham Foundation Trust, Queen Elizabeth Hospital Birmingham, Mindelsohn Way, Birmingham, B15 2WB, UK.
University Hospitals Birmingham NHS Foundation Trust · GBUniversity of Birmingham · GBNIHR Surgical Reconstruction and Microbiology Research Centre · GBQueen Elizabeth Hospital Birmingham · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLow molecular-weight heparin (LMWH) is routinely administered to burn patients for thromboprophylaxis. Some studies have reported heparin resistance, yet the mechanism(s) and prevalence have not been systematically studied. We hypothesized that nucleosomes, composed of histone structures with associated DNA released from injured tissue and activated immune cells in the form of neutrophil extracellular traps (NETs or NETosis), neutralize LMWH resulting in suboptimal anticoagulation, assessed by reduction in anti-factor Xa activity.

methodsBlood was sampled from >15% total body surface area (TBSA) burn patients receiving LMWH on days 5, 10 and 14. Peak anti-factor Xa (AFXa) activity, anti-thrombin (ATIII) activity, cell-free DNA (cfDNA) levels and nucleosome levels were measured. Mixed effects regression was adjusted for multiple confounders, including injury severity and ATIII activity, and was used to test the association between nucleosomes and AFXa.

resultsA total of 30 patients with severe burns were included. Mean TBSA 43% (SD 17). Twenty-three (77%) patients were affected by heparin resistance (defined by AFXa activity <0.2 IU/mL). Mean peak AFXa activity across samples was 0.18 IU/mL (SD 0.11). Mean ATIII was 81.9% activity (SD 20.4). Samples taken at higher LWMH doses were found to have significantly increased AFXa activity, though the effect was not observed at all doses, at 8000 IU no samples were heparin resistant. Nucleosome levels were negatively correlated with AFXa (

conclusionsHeparin resistance is a prevalent issue in severe burns. Nucleosome levels were increased post-burn, and showed an inverse association with AFXa consistent with the hypothesis that they may interfere with the anticoagulant effect of heparin

Indexed as

BurnEnoxaparinFactor-XaHeparin resistanceLow molecular-weight heparinNETosisNeutrophil extracellular trapsNucleosomesThrombosis

Identifiers

PMID34692855
PMCPMC8528639
OpenAlexW3191656624

What Socratic holds

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Registered trials

None linked

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 Socratic graph.