SiREX-Stent for the Treatment of SymptOmatic Lateral VEnous Sinus Stenosis (RESOLVE)

The purpose of the study is to assess the efficacy, safety and the clinical benefit of the SiREX stent for the treatment of disabling pulsatile tinnitus due to stenosis of lateral sinus.

The study will enrol patients suffering from pulsatile tinnitus related to a lateral sinus stenosis lasting more than three months, and who want to be treated with lateral sinus stenting

Study Overview

• Status: Recruiting
• Conditions: Treatment of Symptomatic Lateral Sinus Stenosis; Treatment of Pulsatile Tinnitus Due tu Sinus Stenosis
• Intervention / Treatment: Device: Sinus Stenting

Detailed Description

As there is currently no specifically developed and approved stent on the market for the treatment of symptomatic sinus stenosis, stenting has so far been performed with stents intended for carotid stenosis or peripheral treatment, which leads to considerable limitations. Because of stiff delivery systems (6F or bigger) progression inside the venous sinus is sometimes difficult. Furthermore, the length of such devices is often insufficient to cover the entire pathological segment and more than one device needs to be implanted in an overlaying manor (telescoping), which is accompanied with higher complication risks.

The objective of the study is to prove the efficacy and clinical safety of the new dedicated SiREX Stent with optimized technical features (smaller delivery system, longer lengths, reduced radial force), specially developed for the treatment of venous sinus stenosis. Pulsatile tinnitus is expected to disappear immediately after treatment with a stable effect during time.

• Study Type: Interventional
• Enrollment (Estimated): 78
• Phase: Not Applicable

Contacts and Locations

• Study Contact: Name: Anna Gold; Phone Number: +49 7231 155000; Email: info@acandis.com

Study Locations

• France
  • Paris, France, 75010
    • Recruiting
    • Hôpital Lariboisière
    • Contact: Emmanuel Houdart, Prof; Phone Number: + 33 (0)1 49 95 61 35; Email: emmanuel.houdart@lrb.aphp.fr

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• • Patient ≥ 18 years old

  • Disabling pulsatile tinnitus lasting for more than three months
  • Venous type: pulsatile tinnitus is interrupted by ipsilateral jugular vein compression
  • Lateral sinus stenosis visible on venous MRA or venous angio CT
  • Exclusion of other cause (excepted dehiscence of the lateral sinus related to the stenosis) of PT on MRI and on the temporal bone CT
  • Stenosis located on a dominant or codominant lateral sinus
  • Stenosis associated with a venous gradient of at least 3 mm Hg under general anesthesia (GA) in the absence of sinus dehiscence, or 2 mm Hg under GA if there is sinus dehiscence in a mastoid cell
  • Patients asking for the treatment of her/his pulsatile tinnitus
  • Patients accepting to receive the SiREX® Stent (instead of a carotid stent)
  • Written informed consent

Exclusion Criteria:

• Non-pulsatile tinnitus or pulsatile tinnitus unrelated to lateral sinus stenosis
• Stenosis with gradient < 2 mm Hg in the absence of associated lateral sinus dehiscence

• Any contraindication for treatment according to Instructions for Use:

  • Patients in whom the size of the venous vessel section to be treated does not lie within the range indicated for the stent.
  • Patients for whom angiography shows that the anatomic morphology is not suitable for endovascular treatment due to severe vessel tortuosity or stenosis.Patients who were not pre-treated with antiplatelet agents prior to the procedure.
  • Patients in whom treatment with antiplatelet agents and/or anticoagulants is contraindicated.
  • Patients with an acute subarachnoid haemorrhage.
  • Patients with an active bacterial infection.
  • Patients who are hypersensitive to nickel-titanium.
• Pregnant or breastfeeding woman
• Subject is participating in another clinical study
• Patients with a life-threatening event in the last 6 months
• Patients with a life expectancy under 12 months
• Known, severe comorbidities, which will likely influence carrying out of the follow-up visits (cancer, alcohol/drug abuse or dementia)

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Other: Intervention; Novel medical device	Device: Sinus Stenting; Stenting of symptomatic sinus stenosis

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Disappearance of pulsatile tinnitus at 90 (± 20) days	Disappearance of pulsatile tinnitus at 90 (± 20) days after resolving of the lateral sinus stenosis with SiREX Stent	90 days

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Secondary Efficacy and Clinical Endpoints	• Improvement of THI scores at 90 (± 20) days	24 months

Collaborators and Investigators

• Sponsor: Acandis GmbH

Study record dates

Study Major Dates

• Study Start (Estimated): September 1, 2025
• Primary Completion (Estimated): January 1, 2027
• Study Completion (Estimated): January 1, 2029

Study Registration Dates

• First Submitted: December 5, 2024
• First Submitted That Met QC Criteria: December 5, 2024
• First Posted (Actual): December 10, 2024

Study Record Updates

• Last Update Posted (Estimated): September 4, 2025
• Last Update Submitted That Met QC Criteria: August 27, 2025
• Last Verified: August 1, 2025

More Information

Terms related to this study

• Keywords: Pulsatile Tinnitus; Sinus vein stenosis
• Additional Relevant MeSH Terms: Neurologic Manifestations; Nervous System Diseases; Otorhinolaryngologic Diseases; Sensation Disorders; Ear Diseases; Hearing Disorders; Pathological Conditions, Signs and Symptoms; Signs and Symptoms; Tinnitus
• Other Study ID Numbers: RESOLVE

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No