Evidence map›Paper›PMID 23644542›Full record

ArticleNeuroradiology2013

The sheeping technique or how to avoid exchange maneuvers.

René Chapot, Hannes Nordmeyer, Markus Heddier, Aglaé Velasco, Petra Schooss, Michael Stauder, Paul Stracke, Pascal J Mosimann

Abstract readCase Reports
PubMed Publisher
In one paragraph

Article in Neuroradiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers.

0numbers the graph read from it
0cells of the map it votes in
19citing 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

19 citing papers in PubMed.

  1. Article
  2. Review
  3. Transradial access with Simmons guiding catheter for carotid artery stenting: Feasibility and procedural complications in a single-center experience.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2025
    Article
  4. Review
  5. Article
  6. Transvenous Embolization for Brain Arteriovenous Malformations.Journal of neuroendovascular therapy · 2025
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. S-shaped distal access catheter supported microcatheter navigation into the lenticulostriate artery feeders of brain arteriovenous malformations.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2020
    Article
  15. Article
  16. Article
  17. Vacuum for straightening the microcatheter after intra-aneurysmal looping: The "Lagman vacuum" technique.Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences · 2019
    Article
  18. Article
  19. 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

8 authors.

René ChapotDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany. rene.chapot@krupp-krankenhaus.de.
Hannes NordmeyerDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany.
Markus HeddierDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany.
Aglaé VelascoDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany.
Petra SchoossDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany.
Michael StauderDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany.
Paul StrackeDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany.
Pascal J MosimannDepartment of Intracranial Endovascular Therapy, Alfried-Krupp Krankenhaus Hospital, Alfried-Krupp Strasse 21, Essen, 45131, Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

introductionThe arteries of bifurcation aneurysms are sometimes so angulated or tortuous that an exchange maneuver is necessary to catheterize them with a balloon or stent delivery catheter. Because of the risk of distal wire perforation associated with exchange maneuvers, we sought to find an alternative technique.

methodsOur experience shows that a microcatheter tends to preferentially follow a previously placed microcatheter, even if the initial catheterization might be challenging. Accessing an artery with two microcatheters simultaneously may thus be an alternative to an exchange maneuver. Because of this tendency for catheters to behave like sheep following one another, we named this method the sheeping technique (ST). The ST consists of (a) first placing a 1.7 French microcatheter into the division branch requiring balloon or stent protection to straighten the course of the arteries in order to facilitate and (b) positioning in the same artery of a larger and stiffer balloon or stent microcatheter. Once the second balloon or stent microcatheter is in place, the first microcatheter can be pulled back and used to coil the aneurysm.

resultsBetween January 2009 and December 2012, The ST was successfully used in 208/246 procedures (85%). Conversion to an exchange maneuver was necessary in 38/246 (15%). There were no arterial perforations or ischemic events related to the handling of both microcatheters.

conclusionThe sheeping technique may improve safety by replacing the need for an exchange maneuver during difficult balloon- or stent-assisted coiling.

Indexed as

Angioplasty, BalloonCatheterizationFemaleGermanyHumansIntracranial AneurysmMechanical ThrombolysisMiddle AgedPrevalenceRadiographyRetrospective StudiesRisk FactorsTreatment Outcome

Identifiers

What OpenQuestion holds

Textmetadata
Read underepoch 390

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.