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Manual reduction of a radial artery loop under direct fluoroscopic visualization
  1. Evan Luther1,
  2. Eric Huang1,
  3. Hunter King2,
  4. Michael Silva1,
  5. Joshua Burks1,
  6. Aria Jamshidi1 and
  7. Eric C Peterson3
  1. 1Department of Neurological Surgery, University of Miami School of Medicine, Miami, Florida, USA
  2. 2Department of Neurosurgery, Drexel University College of Medicine, Philadelphia, Pennsylvania, USA
  3. 3Neurological Surgery, University of Miami, Miami, Florida, USA
  1. Correspondence to Dr Evan Luther; evan.luther{at}


Transradial access (TRA) has become increasingly utilized in neurointerventions because it reduces access site complications. However, radial artery anomalies can be difficult to navigate, often necessitating conversion to femoral access. We describe the case of a female patient in her early 70s who underwent preoperative embolization of a carotid body tumor via right TRA. Her radial angiogram demonstrated the presence of a radial artery loop which was successfully navigated with a triaxial system but would not spontaneously reduce, even after the guide catheter was advanced into the subclavian artery. However, manual manipulation of the catheters in the antecubital fossa under direct fluoroscopic visualization reduced the loop, allowing the procedure to continue transradially. Although most radial loops can be traversed and reduced using standard techniques, this case demonstrates that manual reduction can be successful when other measures fail. We recommend attempting this method prior to converting the access site.

  • technique
  • navigation
  • intervention
  • guidewire
  • angiography

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  • Contributors All authors contributed significantly to the development of this manuscript.

  • Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial, or not-for-profit sectors.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; externally peer reviewed.