Using the ulnar artery when the same-arm radial artery is blocked for heart angiography or angioplasty

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This is a prospective observational cohort that follows adults with a documented radial artery occlusion who undergo coronary angiography or angioplasty using transulnar access on the same side. Vascular access choice is made by the treating physician and the study records outcomes without changing clinical decisions. Participants receive standardized baseline and follow-up exams including vascular imaging and tests of hand strength, sensation, and function. The study reports rates of access-related vascular or nerve complications and changes in hand function after the procedure.

Why it matters

Who can join: the full rules

Inclusion Criteria

Participants must meet all of the following criteria to be eligible:

* Adults aged 18 years or older
* Documented radial artery occlusion in the upper limb intended for vascular access, confirmed by ultrasound or angiography
* Scheduled to undergo elective coronary angiography and/or angioplasty
* Transulnar arterial access on the same side as the occluded radial artery is selected by the treating physician
* Contralateral radial artery access is not feasible or is clinically undesirable, including for reasons such as:
* documented occlusion or severe disease of the contralateral radial artery
* unfavorable anatomy or prior failed access
* strategic preservation of the contralateral radial artery for future surgical or dialysis needs
* Adequate ulnar artery flow and anatomy for access, as assessed by pre-procedural ultrasound
* Able and willing to provide written informed consent

Exclusion Criteria

Participants meeting any of the following criteria will be excluded:

* Inadequate or absent ulnar artery flow at the intended access site on ultrasound
* Known ulnar nerve injury or neuropathy affecting the access-side upper limb
* Severe pre-existing motor or sensory dysfunction of the access-side hand that would interfere with functional assessment
* Emergency coronary procedures that preclude baseline vascular or functional assessment
* Participation in another interventional clinical study involving vascular access or intervention in the same upper limb
* Local conditions at the intended access site, such as active infection, burn, or extensive scarring
* Pregnancy or breastfeeding
* Life expectancy less than 6 months

Where it's running

• Hellenic Red Cross Hospital
  Athens, Greece Recruiting
• Hippokratio General Hospital
  Athens, Greece Recruiting

Study contacts

• Principal investigator: Konstantinos Aznaouridis, Ass. Professor of Cardiology — 1st Department of Cardiology, Hippokration Hospital, National and Kapodistrian University of Athens
• Study coordinator: Dimitrios Karelas, MD
• Email: dim.f.karelas@gmail.com
• Phone: +30 698 6428463

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.