Transulnar Access in Patients With Ipsilateral Radial Artery Occlusion Undergoing Coronary Angiography or Angioplasty

Recruiting now

Conditions studied: Radial Artery Occlusion, Vascular Access, Coronary Artery Disease (CAD)

In brief

Coronary angiography and angioplasty are commonly performed through the radial artery at the wrist as this approach is associated with fewer bleeding complications and faster recovery. In some patients, the radial artery becomes occluded after prior procedures, requiring selection of an alternative access site for future coronary interventions. The ulnar artery is a potential alternative wrist access. However, limited data are available on the safety of using the ulnar artery in the same arm as an occluded radial artery and on the possible effects on hand strength, sensation, and daily hand function. The goal of this observational study is to evaluate the safety of transulnar access and its effect on hand function in adults with ipsilateral radial artery occlusion undergoing coronary angiography or angioplasty. The main questions addressed by the study are: * How often do serious access-related vascular or nerve complications occur? * Does hand strength, sensation, or functional use of the hand change during follow-up? * Does the ulnar artery remain patent after the procedure? The choice of vascular access site is made by the treating physician based on clinical judgment. Participants who undergo transulnar access will undergo follow-up assessments, including ultrasound evaluation of arm arteries, standardized hand function testing, and short questionnaires assessing upper-limb function. The findings of this study are expected to inform access-site selection, improve patient counseling, and support safer care for patients with radial artery occlusion undergoing coronary procedures.

Key facts

Study ID: NCT07380399
Run by: National and Kapodistrian University of Athens
People needed: 127
Starts: 2025-11-01
Expected to finish: 2032-01-01
Last updated by the study team: 2026-02-02

Who can join

Age: 18 and older. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

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

You may not qualify if…

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 is running

Hellenic Red Cross Hospital — Athens, Greece (enrolling)
Hippokratio General Hospital — Athens, Greece (enrolling)

Full record on ClinicalTrials.gov

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