Jun-ichi Koyama

Nagano, Japan

Last Updated: 09/26/2026

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Found 47 publications

Cervical Positional Changes Alter Supra-Aortic Branching Geometry: Implications for Transradial Neurointervention.

Cervical Positional Changes Alter Supra-Aortic Branching Geometry: Implications for Transradial Neurointervention.

Journal: World neurosurgery
Published: June 07, 2026

Catheter tensile test: An in vitro evaluation for transradial access.

Catheter tensile test: An in vitro evaluation for transradial access.

Journal: Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences
Published: September 30, 2025

A Case of an Vertebral Artery Dissecting Aneurysm Involving the Posterior Inferior Cerebellar Artery Treated With Aneurysmal Embolization and Proximal Parent Artery Occlusion Under Balloon Protection via the Contralateral Vertebral Artery.

A Case of an Vertebral Artery Dissecting Aneurysm Involving the Posterior Inferior Cerebellar Artery Treated With Aneurysmal Embolization and Proximal Parent Artery Occlusion Under Balloon Protection via the Contralateral Vertebral Artery.

Journal: Cureus
Published: June 08, 2025

Novel Small-Bore Preshaped Guiding Sheath for Transradial Anterior Circulation Interventions: A New Device and Technique.

Novel Small-Bore Preshaped Guiding Sheath for Transradial Anterior Circulation Interventions: A New Device and Technique.

Journal: Neurosurgery practice
Published: April 09, 2025

Forearm access for carotid artery stenting using the dual protection of flow reversal and distal filter: Trans-forearm dual protection technique.

Forearm access for carotid artery stenting using the dual protection of flow reversal and distal filter: Trans-forearm dual protection technique.

Journal: Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences
Published: August 21, 2024

Smaller diameter sheaths are required to safely perform transradial neurointerventions.

Smaller diameter sheaths are required to safely perform transradial neurointerventions.

Journal: Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences
Published: September 12, 2023

Left Transradial Access Using a Radial-Specific Neurointerventional Guiding Sheath for Coil Embolization of Anterior Circulation Aneurysm Associated With the Aberrant Right Subclavian Artery: Technical Note and Literature Review.

Left Transradial Access Using a Radial-Specific Neurointerventional Guiding Sheath for Coil Embolization of Anterior Circulation Aneurysm Associated With the Aberrant Right Subclavian Artery: Technical Note and Literature Review.

Journal: World neurosurgery
Published: July 09, 2023

A new very-small-bore Simmons guiding sheath for transradial neurointervention: Technical note and initial experience.

A new very-small-bore Simmons guiding sheath for transradial neurointervention: Technical note and initial experience.

Journal: Journal of neuroradiology = Journal de neuroradiologie
Published: June 08, 2023

Letter: Transradial Carotid Artery Stenting Using Walrus Balloon Guide Catheter: Technical Aspects and Clinical Outcome.

Letter: Transradial Carotid Artery Stenting Using Walrus Balloon Guide Catheter: Technical Aspects and Clinical Outcome.

Journal: Operative neurosurgery (Hagerstown, Md.)
Published: June 01, 2023

Surgical Trapping of a Cavernous Carotid Aneurysm Causing Carotid Cavernous Fistula After Flow Diverter Placement: Technical Note and Literature Review.

Surgical Trapping of a Cavernous Carotid Aneurysm Causing Carotid Cavernous Fistula After Flow Diverter Placement: Technical Note and Literature Review.

Journal: World neurosurgery
Published: May 09, 2023

Use of the Simmons guiding sheath via left transradial access as a feasible strategy for neurointerventions in patients with an aberrant right subclavian artery.

Use of the Simmons guiding sheath via left transradial access as a feasible strategy for neurointerventions in patients with an aberrant right subclavian artery.

Journal: Journal of neurointerventional surgery
Published: May 05, 2023

Retrograde Parent Artery Occlusion for Ruptured Intracranial Vertebral Artery Dissecting Aneurysms Involving the Posterior Inferior Cerebellar Artery: The "Breakwater" Technique.

Retrograde Parent Artery Occlusion for Ruptured Intracranial Vertebral Artery Dissecting Aneurysms Involving the Posterior Inferior Cerebellar Artery: The "Breakwater" Technique.

Journal: Clinical neuroradiology
Published: May 02, 2023
Showing 1-12 of 47

Last Updated: 09/26/2026