Distal Ischemic Stroke Treatment With Adjustable Low-profile Stentriever
United States, Belgium, Germany168 participantsStarted 2022-03-25
Plain-language summary
The objective of the DISTALS Study is to evaluate the safety and effectiveness of the Tigertriever 13 Revascularization Device in restoring blood flow in the neurovasculature by removing thrombus in patients presenting within 24 hours of onset with an ischemic stroke with disabling neurological deficits due to a primary distal vessel occlusion (DVO), as compared to medical management.
Who can participate
Age range
18 Years – 85 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion criteria
. Age 18-85 years old.
. Pre-stroke mRS ≤2.
. Disabling presenting deficits that localize to the territory of the distal vessel occlusion. Disabling deficits are deficits that, if unchanged, would prevent the subject from performing basic activities of daily living (i.e., bathing, ambulating, toileting, hygiene, and eating) or returning to work.
. NIHSS 4-24, or NIHSS 2-24 for patients with aphasia and/or hemianopia.
. Perfusion lesion (Tmax \>4.0 seconds) volume ≥10 cc on CTP or MR PWI within the territory of the anterior cerebral artery (ACA) segments, a non-dominant or co-dominant M2 middle cerebral artery (MCA) segment, an M3 MCA, or the posterior cerebral artery (PCA) segments.
. Occluded distal vessel diameter ≥1.5 mm as measured on CTA or MRA.
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Successful reperfusion (CTP or MR PWI*) without sICH**.
. Ischemic core lesion (rCBF\<30% on CTP or ADC \<620 on MR DWI) in ≤50% of the perfusion lesion volume.
. Study treatment can be initiated within 24 hours of last known well time (last known time without current stroke symptoms).
Exclusion criteria
. Evidence of acute brain hemorrhage on CT and/or MRI at admission.
. Use of any other intra-arterial (IA) recanalization device prior to the Tigertriever 13 in the target vessel, including aspiration catheter.
. The DVO is a secondary distal occlusion that occurred during a large vessel occlusion (LVO) thrombectomy procedure.
. Excessive tortuosity or stenosis that is anticipated to prevent placement of the microcatheter in the target vessel. Tortuosity or stenosis will be determined on CTA or MRA prior to randomization.
. Evidence of tandem occlusion in the cervical internal carotid artery (ICA), intracranial ICA, M1 MCA, dominant M2 MCA, vertebral artery (VA) or basilar artery (BA) on CTA or MRA.
. Evidence of dissection in the extra or intracranial cerebral arteries.
. Evidence of bilateral acute stroke or acute stroke in multiple territories (e.g., bilateral anterior circulation, anterior/posterior circulation).