New device aims to bypass leg blockages without open surgery
NCT ID NCT02471638
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tested a device called the PQ Bypass System in 78 people with severe peripheral artery disease (blocked leg arteries). The device is designed to create a bypass inside the artery using small tubes (stent grafts) placed through a needle puncture, avoiding the need for traditional open surgery. The main goals were to see if the bypass stayed open and to check for serious complications like death, amputation, or the need for another procedure within a month.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- PQ Bypass System (a device to place stent grafts via a needle puncture instead of open surgery)
- What this could lead to
- If it works, this could offer a less invasive way to restore blood flow in leg arteries, potentially reducing the need for traditional bypass surgery.
- What could go wrong
- This was a small, early study (78 people) with no comparison group, so results may not apply broadly. Risks include bleeding, infection, or the stent graft failing over time.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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78 people
The number who actually took part.
- Started
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Jan 2015
- Finished
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Jun 2020
- Lead sponsor
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A company
The lead sponsor is a pharmaceutical, biotech, or medical-device company.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 90 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Willing and able to provide informed consent * Age 18 or older * Rutherford Classification of 3-5 * Patent iliac and femoral arteries/veins and access vessels, of sufficient size and morphology (including tortuosity), to allow endovascular access with 8 Fr. introducer sheath * Femoro-popliteal lesions ≥10 cm in length considered to be: * Chronic total occlusion (100% stenosis) * Diffuse stenosis (\>50% stenosis) with moderate to heavy calcification * In-stent restenosis (\>50% stenosis) * Proximal and distal target vessels are 5.4-7.0 mm in diameter * Orifice and proximal 1 cm of SFA is patent * Patent popliteal artery 3 cm proximal to tibial plateau * At least 1 patent tibial artery to the foot * Patent femoral vein ≥ 10 mm in diameter or duplicate femoral vein * Subject has \> one year life expectancy Exclusion Criteria: * Bypass length required \> 30 cm * History of deep vein thrombosis * Has a known hypersensitivities, allergies or contraindications to: nitinol, PTFE; aspirin, heparin, antiplatelet, anticoagulant or thrombolytic therapy; or anticoagulation or contrast media that is not amenable to pre-treatment; * Has a known history of intracranial bleeding or aneurysm, myocardial infarction or stroke within the last 12 months * Pregnant or nursing * Untreated flow-limiting aortoiliac occlusive disease * Has renal failure (eGFR \< 30mL/min) * Major distal amputation (above the transmetatarsal) in the study or non-study limb * Patient has had a revascularization procedure on the target limb within 30 days * Patient has a planned amputation of the target limb * Previous bypass surgery on the target limb * Patient is participating in another clinical study for which follow-up is currently on going. * Patient has a condition that in the view of the investigator precludes participation in this study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Gdansk Medical University
Gdansk, Poland
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Institute of Haematology Medicine Indira Gandhi
Warsaw, Poland
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Ospedale San Raffaele
Milan, 20132, Italy
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Poznan University of Medical Sciences
Poznan, 61-848, Poland
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Stradins University Hospital
Riga, LV-1002, Latvia
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Universidad Católica de Chile
Santiago, Chile
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University of Leipzig Medical Centre
Leipzig, 04103, Germany
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Vascular Service
Auckland, 1023, New Zealand
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