Evidence map›Paper›PMID 34746421›Full record

ArticleEuropean stroke journal2021

Correlation between acute ischaemic stroke clot length before mechanical thrombectomy and extracted clot area: Impact of thrombus size on number of passes for clot removal and final recanalization.

Rosanna Rossi, Seán Fitzgerald, Sara M Gil, Oana M Mereuta, Andrew Douglas, Abhay Pandit, Paul Brennan, Sarah Power, Jack Alderson, Alan O'Hare and 14 more

Abstract read
In one paragraph

Article in European stroke journal, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
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

15 citing papers in PubMed.

  1. Article
  2. Article
  3. Article
  4. Article
  5. NIMBUS geometric clot extractor for challenging clots: Real-world clinical experience and clot composition.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  6. Article
  7. Combined technique versus stent-retriever alone: Interaction analysis of angioarchitectural and technical features.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
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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

24 authors.

Rosanna RossiDepartment of Physiology and Galway Neuroscience Centre, School of Medicine, National University of Ireland, Galway, Ireland.ORCID https://orcid.org/0000-0002-3656-2908
Seán FitzgeraldDepartment of Physiology and Galway Neuroscience Centre, School of Medicine, National University of Ireland, Galway, Ireland.ORCID https://orcid.org/0000-0001-6634-092X
Sara M GilDepartment of Radiology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.
Oana M MereutaDepartment of Physiology and Galway Neuroscience Centre, School of Medicine, National University of Ireland, Galway, Ireland.ORCID https://orcid.org/0000-0003-3741-3784
Andrew DouglasDepartment of Physiology and Galway Neuroscience Centre, School of Medicine, National University of Ireland, Galway, Ireland.
Abhay PanditCÚRAM-SFI Research Centre in Medical Devices, National University of Ireland Galway, Galway, Ireland.
Paul BrennanDepartment of Radiology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.
Sarah PowerDepartment of Radiology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.
Jack AldersonDepartment of Radiology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.
Alan O'HareDepartment of Radiology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.
Michael GilvarryCerenovus, Galway, Ireland.
Ray McCarthyCerenovus, Galway, Ireland.
Klearchos PsychogiosMetropolitan Hospital, Department of Neuroradiology, Piraeus, Greece.
Georgios MagoufisMetropolitan Hospital, Department of Neuroradiology, Piraeus, Greece.
Georgios TsivgoulisMetropolitan Hospital, Department of Neuroradiology, Piraeus, Greece.
István SzikoraSecond Department of Neurology, National & Kapodistrian University of Athens, "Attikon" University Hospital, Athens, Greece.
Katarina JoodNational Institute of Clinical Neurosciences, Department of Neurointerventions, Budapest, Hungary.
Petra RedforsNational Institute of Clinical Neurosciences, Department of Neurointerventions, Budapest, Hungary.
Annika NordanstigNational Institute of Clinical Neurosciences, Department of Neurointerventions, Budapest, Hungary.
Erik CederDepartment of Neurology, Sahlgrenska University Hospital, Gothenburg, Sweden, and Department of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.
Turgut TatlisumakNational Institute of Clinical Neurosciences, Department of Neurointerventions, Budapest, Hungary.
Alexandros RentzosDepartment of Neurology, Sahlgrenska University Hospital, Gothenburg, Sweden, and Department of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden.
John ThorntonDepartment of Radiology, Royal College of Surgeons in Ireland, Beaumont Hospital, Dublin, Ireland.
Karen M DoyleDepartment of Physiology and Galway Neuroscience Centre, School of Medicine, National University of Ireland, Galway, Ireland.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionWe assessed the correlation between thrombus size before and after mechanical thrombectomy, measured as length by Computed Tomography Angiography/Non-Contrast Computed Tomography (CTA/NCCT) and Extracted Clot Area, ECA, respectively. We also assessed the influence of thrombus size on the number of passes required for clot removal and final recanalization outcome. MATERIALS AND

methodsAcute ischaemic stroke (AIS) thrombi retrieved by mechanical thrombectomy from 500 patients and data of clot length by CTA/NCCT were collected from three hospitals in Europe. ECA was obtained by measuring the area of the extracted clot. Non-parametric tests were used for data analysis.

resultsA strong positive correlation was found between clot length on CTA/NCCT and ECA (rho = 0.619,N = 500,P < 0.0001*). Vessel size influences clot length on CTA/NCCT (H2 = 98.6, P < 0.0001*) and ECA (H2 = 105.6,P < 0.0001*), but the significant correlation between CTA/NCCT length and ECA was evident in all vessels. Poorer revascularisation outcome was associated with more passes (H5 = 73.1, P < 0.0001*). More passes were required to remove longer clots (CTA/NCCT; H4 = 31.4, P < 0.0001*; ECA; H4 = 50.2, P < 0.0001*). There was no significant main association between recanalization outcome and length on CTA/NCCT or ECA, but medium sized clots (ECA 20-40 mm

conclusionClot length on CTA/NCCT strongly correlates with ECA. Occlusion location influences clot size. More passes are associated with poorer revascularisation outcome and bigger clots. The relationship between size and revascularisation outcome is more complex. Clots of medium ECA take less passes to remove and are associated with better recanalization outcome than both smaller and larger clots.

Indexed as

Acute ischemic strokecomputed tomographythrombectomy

Identifiers

PMID34746421
PMCPMC8564157

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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.