NCT07380399Recruiting
Transulnar Access in Patients With Ipsilateral Radial Artery Occlusion Undergoing Coronary Angiography or Angioplasty
Transulnar Access in Patients With Ipsilateral Radial Artery Occlusion Undergoing Coronary Angiography or Angioplasty: Safety and Effect on Hand Function (ULNART)
Source: ClinicalTrials.gov · Last updated 2 Feb 2026
Brief summary (registry, in English)
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.
- Status (registry)
- Recruiting
- Study type
- Observational
- Enrollment
- 127 (estimated)
- First submitted
- 21 Jan 2026
- Start date
- 1 Nov 2025
- Primary completion date
- Jan 2030
- Lead sponsor
- National and Kapodistrian University of Athens
- Diseases
- Coronary artery disease
- NCT number
- NCT07380399
What you commit to
- Study type: Observational
- Planned participants: 127
- From 1 Nov 2025 to the primary completion date, Jan 2030
- 2 sites in 1 country
- Visits and tests: ask the trial team, the registry does not list them
Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.
Who cannot take part
Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.
Other illness
- Local conditions at the intended access site, such as active infection, burn, or extensive scarring
Other
- 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
- Pregnancy or breastfeeding
- Life expectancy less than 6 months
Who the study is looking for
- 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
Age in the registry: 18 years to - · Sex: All · Does not accept healthy volunteers
Sites (2)
Sites in registry order. Pick your city on the disease page to sort them by distance.
| Site | City | Country | Site status |
|---|---|---|---|
| Hippokratio General Hospital Coordinator of this site? Confirm its status | Athens | Greece | Recruiting |
| Hellenic Red Cross Hospital Coordinator of this site? Confirm its status | Athens | Greece | Recruiting |
This page is information, not medical advice. Discuss any trial with your doctor.