Evidence map›Paper›PMID 26319999›Full record

Trial reportNeuroradiology2015

Protected stent retriever thrombectomy prevents iatrogenic emboli in new vascular territories.

Pascal P Klinger-Gratz, Gerhard Schroth, Jan Gralla, Simon Jung, Christian Weisstanner, Rajeev K Verma, Pasquale Mordasini, Frauke Kellner-Weldon, Kety Hsieh, Mirjam R Heldner and 4 more

Open access · hybridAbstract readClinical Trial
In one paragraph

Trial report in Neuroradiology, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 23 papers.

0numbers the graph read from it
0cells of the map it votes in
23citing papers in PubMed
2.6field-weighted citation impact, top 10% 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

23 citing papers in PubMed, 41 citations in OpenAlex.

  1. Trial
  2. Article
  3. Analysis of gradual diameter thrombectomy stentTranslational neuroscience · 2025
    Article
  4. Article
  5. Article
  6. Article
  7. Stroke thrombectomy complication management.Journal of neurointerventional surgery · 2021
    Review
  8. Review
  9. Review
  10. Exophthalmos following mechanical thrombectomy for anterior circulation stroke: A retrospective study and review of literature.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2020
    Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
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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

14 authors at 2 institutions in 1 country.

Pascal P Klinger-GratzDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Gerhard SchrothDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland. gerhard.schroth@insel.ch.
Jan GrallaDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Simon JungDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Christian WeisstannerDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Rajeev K VermaDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Pasquale MordasiniDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Frauke Kellner-WeldonDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Kety HsiehDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
Mirjam R HeldnerDepartment of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland.
Urs FischerDepartment of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland.
Marcel ArnoldDepartment of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland.
Heinrich P MattleDepartment of Neurology, Inselspital, Bern University Hospital and University of Bern, Bern, Switzerland.
Marwan El-KoussyDepartment of Diagnostic and Interventional Neuroradiology, Inselspital, Freiburgstrasse 10, Bern University Hospital and University of Bern, 3010, Bern, Switzerland.
University Hospital of Bern · CHUniversity of Bern · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionDiagnostic tools to show emboli reliably and protection techniques against embolization when employing stent retrievers are necessary to improve endovascular stroke therapy. The aim of the present study was to investigate iatrogenic emboli using susceptibility-weighted imaging (SWI) in an open series of patients who had been treated with stent retriever thrombectomy using emboli protection techniques.

methodsPatients with anterior circulation stroke examined with MRI before and after stent retriever thrombectomy were assessed for iatrogenic embolic events. Thrombectomy was performed in flow arrest and under aspiration using a balloon-mounted guiding catheter, a distal access catheter, or both.

resultsIn 13 of 57 patients (22.8%) post-interventional SWI sequences detected 16 microemboli. Three of them were associated with small ischemic lesions on diffusion-weighted imaging (DWI). None of the microemboli were located in a new vascular territory, none showed clinical signs, and all 13 patients have been rated as Thrombolysis in Cerebral Infarction (TICI) 2b (n = 3) or 3 (n = 10). Retrospective reevaluation of the digital subtraction angiography (DSA) detected discrete flow stagnation nearby the iatrogenic microemboli in four patients with a positive persistent collateral sign in one.

conclusionOur study demonstrates two things: First, SWI seems to be more sensitive to detect emboli than DWI and DSA and, second, proximal or distal protected stent retriever thrombectomy seems to prevent iatrogenic embolization into new vascular territories during retraction of the thrombus, but not downstream during mobilization of the thrombus. Both techniques should be investigated and refined further.

Indexed as

StentsAgedAngiography, Digital SubtractionDevice RemovalEquipment Failure AnalysisFemaleHumansIatrogenic DiseaseIntracranial EmbolismIntracranial ThrombosisMagnetic Resonance ImagingMaleMechanical ThrombolysisMiddle AgedPrognosisProsthesis DesignCollateralsStent retrieverStrokeSWITICI

Identifiers

PMID26319999
PMCPMC4602059
OpenAlexW1959724334

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Registered trials

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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.