ClinicalTrials.gg
Enrolling by invitationNCT06781385TNK-FLOWUpdated Sep 25, 2026

Intra-Arterial Tenecteplase Following Endovascular Thrombectomy for Large Vessel Occlusion Stroke

A Phase 2 interventional study of Intra-arterial Tenecteplase and Intra-arterial Saline in Acute Ischemic Stroke, sponsored by Wake Forest University Health Sciences. Enrolling by invitation at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-25.

Sponsored by Wake Forest University Health Sciences · Phase 2, Interventional, and Treatment

Phase
Phase 2
Study type
Interventional
Enrollment
40
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to determine the safety and feasibility of using intra-arterial Tenecteplase in patients undergoing blood clot extraction for treatment of acute ischemic (non-bleeding) stroke. Intravenous Tenecteplase is FDA-approved to treat patients with an ischemic stroke presenting within the 0-3-hour time window.

Read the detailed description

The primary objective of this study is to determine the safety and feasibility of intra-arterial Tenecteplase in selected patients with persistent post-thrombectomy hypoperfusion on computed tomography perfusion based on symptomatic intracranial hemorrhage (parenchymal hematoma type 2, subarachnoid hemorrhage, and/or intraventricular hemorrhage producing decline from the initial NIHSS of ≥ 4 points) at 24-36 hours.

02

Conditions studied

  • Acute Ischemic Stroke

Keywords

  • brain hemorrhage
  • stroke
  • blood clot
03

In context

Ischemic Stroke

2,612 studies on the registry are indexed under Ischemic Stroke; 971 are open to participants now.

This study's planned enrollment of 40 is below the median of 120 across 1,776 interventional studies indexed under Ischemic Stroke.

Browse Ischemic Stroke studies →

Lead sponsor

Wake Forest University Health Sciences is the lead sponsor of 1,351 studies on the registry; 201 are open to participants now.

Of its 332 completed or terminated interventional studies of FDA-regulated products, 251 (76%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Patient/legally authorized representative has signed the Form
  • Ability to comply with the study protocol, in the investigator's judgment
  • Functionally independent (modified Rankin scale 0-2) prior to presentation
  • Baseline National Institutes of Health Stroke Scale (NIHSS) ≥ 6
  • Clinical syndrome consistent with occlusion of the internal carotid artery (ICA) or proximal middle cerebral artery (MCA), presenting within 4.5- to 24-hours of TLKW
  • Evidence of ICA, MCA-M1, or MCA-M2 occlusion on baseline computed tomography angiogram (CTA) or magnetic resonance angiogram (MRA). ICA/MCA tandem occlusions may be enrolled
  • Alberta Stroke Program Early Computed Tomography Score ≥ 6 on pre-thrombectomy unenhanced CT as determined by treating neurologist or reading radiologist
  • Pre-thrombectomy CTP or MRP with core infarction (cerebral blood flow \< 30%) \< 70 ml, mismatch ratio ≥ 1.8, mismatch volume ≥ 15 ml (completed within 120 minutes of skin puncture for thrombectomy). If skin puncture occurs more than 120 minutes after the pre-thrombectomy CTP, enrollment may proceed at the PI's discretion.
  • Endovascular thrombectomy of ICA, MCA-M1 or MCA-M2 occlusion performed according to local standard of care, defined as at least completing the initial diagnostic angiogram
  • CTP performed with RAPID AI AngioFlowTM within 30 minutes of thrombectomy completion
  • Modified thrombolysis in cerebral infarction (mTICI) 2b-3 revascularization following endovascular thrombectomy (EVT) (or after initial diagnostic angiogram)
  • Presence of Tm > 6 lesion on post-EVT CTP of adequate quality for interpretation in the distribution of the symptomatic occlusion

Exclusion criteria

Exclusion Criteria:

  • Current participation in another drug or device study
  • Known or allergy to any ingredients of tenecteplase
  • Active internal bleeding
  • Known bleeding diathesis (e.g., Alzheimer's patients taking lecanemab)
  • Systolic blood pressure > 185 mm Hg or diastolic blood pressure > 110 mm Hg after EVT, to medical therapy
  • Known hereditary or acquired hemorrhagic diathesis, coagulation factor deficiency; recent oral anticoagulant therapy with > 1.7
  • Use of one of the new oral anticoagulants within the last 48 hours (dabigatran, rivaroxaban, apixaban, edoxaban)
  • Treatment with a thrombolytic within the last 3 months prior to randomization
  • Baseline count \< 100,000/mcL (results must be available prior to treatment)
  • Baseline blood glucose > 400 mg/dL (22.20 mmol/L)
  • Baseline blood glucose \< 50 mg/dL; needs to be normalized prior to randomization
  • Intracranial or intraspinal surgery or trauma within 2 months
  • Intracranial malignant neoplasm, arteriovenous malformation, or unsecured aneurysm > 1 cm
  • Other serious, advanced, or terminal illness (investigator's judgment) or is less than 6 months
  • History of acute ischemic stroke in the last 90 days
  • History of hemorrhagic stroke
  • Presumed septic embolus; suspicion of bacterial endocarditis
  • Any other condition that, in the opinion of the investigator, precludes an endovascular procedure or poses a significant hazard to the patient if an endovascular procedure was to be performed
  • Pregnant
  • Acute intracranial hemorrhage on pre-thrombectomy imaging or suspected acute intracranial hemorrhage after EVT
  • Acute bilateral strokes on initial imaging
  • Multiple acute intracranial occlusions (except ICA/MCA) on initial CTA or MRA
  • Significant hemispheric mass effect or any amount of midline shift due to acute stroke
  • Placement of cervical carotid or intracranial stent during thrombectomy procedure requiring dual antiplatelet therapy
Terms in these criteria, in plain language(7)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Relapsed and refractory

Relapsed: the illness came back after treatment had worked. Refractory: it did not respond to treatment, or stopped responding while still on it.

INR, PT and aPTT (clotting tests)

Blood tests of how long blood takes to clot. The INR is the prothrombin time (PT) put on a common scale; about 1 is usual for someone not taking a blood thinner.

Criteria often make an exception for people on a blood thinner such as warfarin, whose INR is raised on purpose.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
40 participants (estimated)

Study arms

  • Experimental
    Intra-arterial Tenecteplase

    Following endovascular thrombectomy for large vessel occlusion stroke one-time dose of intra-arterial Tenecteplase (0.125 mg/kg, maximum dose 12.5 mg) will be delivered over 5-10 seconds by the treating neuro-interventionalist through a microcatheter positioned as close as possible to the residual thrombus or as distal as possible in the originating vessel, per the discretion of the neuro-interventionalist.

    Drug: Intra-arterial Tenecteplase

  • Placebo comparator
    Intra-arterial Saline

    Following endovascular thrombectomy for large vessel occlusion stroke one-time dose of saline (0.9% NaCl solution) will be delivered over 5-10 seconds by the treating neuro-interventionalist through a microcatheter positioned as close as possible to the residual thrombus or as distal as possible in the originating vessel, per the discretion of the neuro-interventionalist.

    Drug: Intra-arterial Saline

Interventions

  • DrugIntra-arterial Tenecteplase

    One-time dose of intra-arterial tenecteplase post-thrombectomy

  • DrugIntra-arterial Saline

    One-time dose of intra-arterial saline post-thrombectomy

06

What researchers measure

Primary outcomes

  1. Participants with Change in Symptomatic Intracranial Hemorrhage

    Number of participants with symptomatic intracranial hemorrhage (parenchymal hematoma type 2, subarachnoid hemorrhage, and/or intraventricular hemorrhage) producing decline from the initial National Institutes of Health Stroke Scale (NIHSS) of ≥ 4 points.

    Time frame: Hour 36

  2. Participants with Parenchymal Hematoma Type 1

    Number of participants with parenchymal hematoma type 1

    Time frame: 24 Hours

  3. Participants with Parenchymal Hematoma Type 2

    Number of participants with parenchymal hematoma type 2

    Time frame: 24 Hours

  4. 30-Day Mortality Count

    Number of patients expired

    Time frame: Day 30

  5. 90-Day Mortality Count

    Number of patients expired

    Time frame: Day 90

  6. Number of Grade 3 Adverse Events

    Total number of grade 3 adverse events

    Time frame: Hour 24

  7. Number of Grade 3 Adverse Events

    Total number of grade 3 adverse events

    Time frame: Day 5

  8. Number of Grade 3 Adverse Events

    Total number of grade 3 adverse events

    Time frame: Day 30

  9. Number of Grade 3 Adverse Events

    Total number of grade 3 adverse events

    Time frame: Day 90

Other outcomes

  1. Proportion of subjects achieving early neurological improvement

    Proportion of subjects achieving early neurological improvement, defined as National Institutes of Health Stroke Scale (NIHSS) reduction by ≥ 4 points or total NIHSS 0-2

    Time frame: Hour 24

  2. Proportion of subjects achieving delayed neurological improvement

    Proportion of subjects achieving delayed neurological improvement, defined as National Institutes of Health Stroke Scale (NIHSS) reduction by ≥ 4 points or total NIHSS 0-2

    Time frame: Day 30, Day 90

  3. Ordinal Modified Rankin Scale score

    Modified Rankin scale scores range from 0-6. Higher score indicates greater disability.

    Time frame: Day 90

  4. Participants with Change in Modified Rankin Scale Score 0-2 Points

    Number of participants with change in Modified Rankin Scale score of 0-2 points or return to baseline modified Rankin scale score.

    Time frame: Day 90

  5. Participants with Change in Modified Rankin Scale Score 0-1 Points

    Number of participants with change in Modified Rankin Scale score of 0-1 points or return to baseline modified Rankin scale score.

    Time frame: Day 90

  6. Participants with Change in Modified Rankin Scale Score 0-3 Points

    Number of participants with change in Modified Rankin Scale score of 0-3 points or return to baseline modified Rankin scale score.

    Time frame: Day 90

  7. Change in Infarct Volume

    Change in infarct volume on follow up CT or MRI

    Time frame: Hour 24

  8. Barthel Index Score

    Number of participants with Barthel Index score ≥ 95.

    Time frame: Day 90

  9. Median EuroQol-5-Dimension (EQ-5D) Index

    Median EuroQol-5-Dimension (EQ-5D) index has a score range of -0.573 to 1. Higher score indicates better quality score.

    Time frame: Day 90

07

Study locations

1 site
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Timeline

1 registry update since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Sep 2025 (actual). Primary completion is estimated for Jun 2028, 33 months after the start.

Of 83 non-industry phase 2 interventional studies under Ischemic Stroke, half reached primary completion within 28 months of starting (the median), counting those still running; a quarter within 15 and three quarters within 40. This study's planned 33 months is above that.

Counting every sponsor, half of 124 studies reached it within 28 months; a quarter within 15 and three quarters within 39.

How these figures are worked out, and which studies are left out of them.

Registered
Jan 13, 2025
First posted
Jan 17, 2025
StartActual
Sep 22, 2025
Primary completionEst.
Jun 2028
CompletionEst.
Jun 2028
Last update
Sep 25, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Minor edits
Nothing that changes what the study is or who can join. Edited: verification date
1 update, last Sep 25, 2026
Show all 1 update
  1. Sep 25, 2026
    Minor edits only
    + 1 other change: verification date

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT06781385
Collaborators
Genentech, Inc.
Responsible party
Sponsor
First posted
Jan 17, 2025
Start date
Sep 22, 2025
Primary completion
Jun 2028 (estimated)
Completion
Jun 2028 (estimated)
Last update
Sep 25, 2026

Study contacts

Rahul Karamchandani, MD
principal investigator · Atrium Health Neurosciences Institute

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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