Evidence map›Paper›PMID 33722968›Full record

ArticleJournal of neurointerventional surgery2022

Maximizing the catheter-to-vessel size optimizes distal flow control resulting in improved revascularization in vitro for aspiration thrombectomy.

Raul G Nogueira, David Ryan, Liam Mullins, John Thornton, Seán Fitzgerald

Open access · hybridAbstract read
In one paragraph

Article in Journal of neurointerventional surgery, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
4.7field-weighted citation impact, top 4% 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

31 citing papers in PubMed, 57 citations in OpenAlex.

  1. Trial
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  3. Review
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  5. Article
  6. An in vitro assessment of aspiration technologies: Location of conduit for 6F aspiration catheters and design of catheter tip influence clot retrieval success.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  7. Balancing flow arrest and aspiration: The relationship between balloon guide catheters, large-bore aspiration, and first pass effect in mechanical thrombectomy.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  8. MillipedeInterventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  9. Article
  10. Does endovascular thrombectomy using super-bore 0.088" large distal platform offer advantages over balloon guide catheters in acute ischemic stroke secondary to large vessel occlusion?Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  11. Impact of next-generation delivery assist catheters and crossing strategy on reperfusion success in aspiration thrombectomy.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  12. Article
  13. Overcoming the black box of aspiration thrombectomy in acute ischemic stroke: An early clinical experience of using contrast injections to understand clot-catheter interactions.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  14. Article
  15. Review
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  20. In vitro models for the experimental evaluation of mechanical thrombectomy devices in acute ischemic stroke.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2023
    Review
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

5 authors at 3 institutions in 2 countries.

Raul G NogueiraMarcus Stroke & Neuroscience Center, Grady Memorial Hospital, Emory University, Atlanta, Georgia, USA.
David RyanDepartment of Mechanical Engineering, National University of Ireland Galway, Galway, Ireland.
Liam MullinsPerfuze Ltd, Galway, Ireland.
John ThorntonDepartment of Radiology, Royal College of Surgeons Ireland, Beaumont Hospital, Dublin, Ireland.
Seán FitzgeraldDepartment of Physiology, National University of Ireland Galway, Galway, Ireland sean.fitzgerald@nuigalway.ie.ORCID http://orcid.org/0000-0001-6634-092X
Ollscoil na Gaillimhe – University of Galway · IEGrady Memorial Hospital · USRoyal College of Surgeons in Ireland · IE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundBalloon guide catheters (BGCs) achieve proximal flow control during thrombectomy but antegrade intracranial flow often persists via the Circle of Willis. Closely sizing an aspiration catheter to the target vessel might achieve greater flow control and improve technical performance. Our objective was to measure the impact of aspiration catheter size on distal flow control and flow reversal with and without the use of BGCs. Clot retrieval testing was performed to establish the impact of these parameters on revascularization.

methodsAn in vitro thrombectomy model replicated in vivo conditions. Flow was measured continuously using ultrasonic flow sensors placed 20 cm distal to the catheter tip in the middlel cerebral artery (MCA). Four aspiration catheters of increasing size were evaluated: ACE 60 and 64 (Penumbra), SOFIA Plus (MicroVention), and Millipede 088 (Perfuze). Two clot analog types (red blood cell-rich and fibrin/platelet-rich) were used for clot retrieval testing.

resultsThe larger area of the 'superbore' Millipede 088 catheter resulted in a larger reduction in antegrade flow than standard aspiration catheters, even when the latter were combined with a BGC. During aspiration, 6Fr catheters were unable to cause flow reversal in the distal MCA while the Millipede 088 achieved significant distal flow reversal (-146 mL/min) (P<0.0001*) (*denotes significance). The solo use of Millipede 088 resulted in better recanalization outcomes and significantly reduced distal emboli for internal carotid artery (P=0.015*) and MCA (P=0.014*) occlusions compared with all other devices and combinations.

conclusionsMaximizing the catheter-to-vessel size facilitates near flow-arrest on catheter insertion, potentially negating the need for a BGC. A 0.088 inch aspiration catheter enables significant flow reversal in the distal MCA during aspiration.

Indexed as

StrokeThrombosisCathetersHumansThrombectomyTreatment Outcomeballooncatheterdevicestrokethrombectomy

Identifiers

PMID33722968
PMCPMC8785049
OpenAlexW3136825767

What OpenQuestion holds

Textmetadata
LicenceCC BY
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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 OpenQuestion graph.