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New device aims to bypass leg blockages without open surgery

NCT ID NCT02471638

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed This study
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

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

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

78 people

The number who actually took part.

Started

Jan 2015

Finished

Jun 2020

Lead sponsor

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

18 to 90 years

Sex

Anyone

Healthy volunteers

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

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

  • Gdansk Medical University

    Gdansk, Poland

  • Institute of Haematology Medicine Indira Gandhi

    Warsaw, Poland

  • Ospedale San Raffaele

    Milan, 20132, Italy

  • Poznan University of Medical Sciences

    Poznan, 61-848, Poland

  • Stradins University Hospital

    Riga, LV-1002, Latvia

  • Universidad Católica de Chile

    Santiago, Chile

  • University of Leipzig Medical Centre

    Leipzig, 04103, Germany

  • Vascular Service

    Auckland, 1023, New Zealand

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