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IVUS Guidance in BTK Interventions
Sponsor: Shin Kong Wu Ho-Su Memorial Hospital
Summary
Chronic limb-threatening ischemia (CLTI) is a severe form of peripheral artery disease in which very poor blood flow in the arteries below the knee can cause rest pain, non-healing wounds, and even loss of the limb. It is often treated with endovascular therapy (EVT), a minimally invasive procedure that opens the blocked artery, but the artery frequently narrows or closes again afterward. These procedures are usually guided by X-ray pictures taken with dye (angiography). Intravascular ultrasound (IVUS) is an imaging tool that uses a small catheter inside the artery to give a more detailed view of the vessel, which may help doctors open it more completely. It is not yet clear whether adding IVUS improves results below the knee. This study is testing whether guiding treatment with IVUS plus angiography keeps the artery open better than angiography alone. Adults aged 18 or older with CLTI who are having endovascular therapy for a blocked artery below the knee may take part. Participants are assigned by chance to be treated with either both imaging methods or angiography alone, and are followed for 12 months. The main question is how well the treated artery stays open at 6 months; researchers will also compare repeat procedures, amputation, complications, wound healing, survival, and quality of life.
Official title: Intravascular Ultrasound IMaging vs Angiography-Guided EVT in Below-the-Knee Arteries
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
INTERVENTIONAL
Enrollment
212
Start Date
2026-08
Completion Date
2030-07
Last Updated
2026-07-28
Healthy Volunteers
No
Conditions
Interventions
Intravascular ultrasound-guided EVT
Endovascular therapy of the below-the-knee artery is guided by intravascular ultrasound (IVUS) imaging in addition to X-ray angiography, with IVUS used to assess the lesion, size and select devices, optimize treatment, and confirm the final result.
Angiography-guided EVT
Endovascular therapy of the below-the-knee artery is guided by X-ray angiography with contrast dye alone, without the use of intravascular ultrasound, to assess the lesion, size and select devices, and judge the final result.
Locations (4)
Chi Mei Medical Center
Tainan, Taiwan
National Taiwan University Hospital
Taipei, Taiwan
Shin Kong Wu Ho-Su Memorial Hospital
Taipei, Taiwan
Linkou Chang Gung Memorial Hospital
Taoyuan, Taiwan