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Stenting of Venous Sinus Stenosis for Medically Refractory Idiopathic Intracranial Hypertension

Primary Purpose

Idiopathic Intracranial Hypertension

Status
Unknown status
Phase
Not Applicable
Locations
Canada
Study Type
Interventional
Intervention
Stenting of the venous sinus
Sponsored by
Ottawa Hospital Research Institute
About
Eligibility
Locations
Arms
Outcomes
Full info

About this trial

This is an interventional treatment trial for Idiopathic Intracranial Hypertension focused on measuring stenting venous sinus, intracranial hypertension, quality of life, headache, visual impairment

Eligibility Criteria

18 Years - 80 Years (Adult, Older Adult)All SexesDoes not accept healthy volunteers

Inclusion Criteria:

  • Age > 18 year-old, living in Ontario, Canada
  • Patient with diagnostic of Idiopathic Intracranial Hypertension, who failed medical treatment.
  • Venous imaging showing bilateral transverse sinus stenosis or unilateral transverse sinus stenosis with contralateral transverse sinus atresia.
  • Pressure gradient across the stenosis > 8 mmHg
  • Signed informed consent obtained from the patient

Exclusion Criteria:

  • Allergic reaction to iodine contrast despite premedication
  • Contraindication to general anesthesia,
  • Contraindication to Aspirin, Clopidogrel (Plavix®) or anticoagulants
  • Patient with medical history of intracranial venous thrombosis
  • Pregnant women

Sites / Locations

  • The Ottawa Hospital Civic CampusRecruiting

Arms of the Study

Arm 1

Arm Type

Experimental

Arm Label

Neurointerventional

Arm Description

Stenting of the venous sinus is the neuro-interventional treatment that is being offered to patients with idiopathic intracranial hypertension that are refractory to medical management.

Outcomes

Primary Outcome Measures

Normalized CSF pressure post venous stenting
The primary outcome will be normalization of CSF pressure after venous stenting at 6 months in more than 70% of the patients in a cohort of medically refractory IHH (idiopathic intracranial hypertension) patients.

Secondary Outcome Measures

Assess the long-term success of this treatment in terms of clinical recurrence rate and long-term patency of the sinus.
The secondary outcomes will consist of safety data (number of adverse events and severity of adverse events. Morbidity and mortality will be considered as secondary endpoints. A morbid event will be defined as an adverse event of any severity being possibly and probably related to the disease or the treatments and happening during the twelve-month follow-up period.

Full Information

First Posted
March 4, 2014
Last Updated
May 11, 2017
Sponsor
Ottawa Hospital Research Institute
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1. Study Identification

Unique Protocol Identification Number
NCT02143258
Brief Title
Stenting of Venous Sinus Stenosis for Medically Refractory Idiopathic Intracranial Hypertension
Official Title
Stenting of Venous Sinus Stenosis for Medically Refractory Idiopathic Intracranial Hypertension
Study Type
Interventional

2. Study Status

Record Verification Date
May 2017
Overall Recruitment Status
Unknown status
Study Start Date
March 2014 (undefined)
Primary Completion Date
July 2017 (Anticipated)
Study Completion Date
July 2017 (Anticipated)

3. Sponsor/Collaborators

Responsible Party, by Official Title
Sponsor
Name of the Sponsor
Ottawa Hospital Research Institute

4. Oversight

Data Monitoring Committee
Yes

5. Study Description

Brief Summary
Increased Intracranial Hypertension (IIH), also known as Pseudotumor Cerebri, is defined by increased cerebral spinal fluid (CSF) pressure in the absence of intracranial, metabolic, toxic or hormonal causes of intracranial hypertension. It is characterized by headaches, tinnitus and visual loss, due to optic atrophy, in 50% of cases. Surgical treatments, such as CSF shunt placement and optic nerve sheath fenestration (ONSF), are indicated in case of failure or non-compliance (owing to side effects) of medical treatments (that mainly includes weight loss and drugs, such as Carbonic Anhydrase Inhibitors). However, these surgical treatments are limited by relative high complications and recurrence rate. Indeed, improvement in visual function after ONSF is often transient and the risk of complications, including visual loss, pupillary dysfunction, and vascular complications is up to 40%. With no better treatment option, intraventricular or lumbar shunt placement has become the traditional treatment for medically refractory IIH, despite poor results. Indeed, series of patients with IIH treated with shunt replacement report a complications rate (shunt occlusion, disconnection, infection or intracranial hematoma formation) around 50% and a failure rate up to 64% within 6 months. As a consequence, shunt revision is often required and efficacy of the technique to control the disease is questionable. The role of intracranial transverse sinus stenosis in IIH has recently gained a particular interest. Despite the fact that transverse sinus stenosis in IIH may be due to increased intracranial pressure, some authors believe that the rise in intracranial pressure and its effect are worsened by the secondary appearance of the venous sinus stenosis. To date, very few complications have been reported in IIH patients with venous sinus stent placement.
Detailed Description
Despite the fact that the results of venous stenting in IIH are still preliminary, it suggests that this technique could become a viable alternative for medically refractory IIH patients with transverse sinus stenosis. However, prospective studies with long-term, standardized and independent follow-up are required to evaluate this new alternative with a higher level of evidence. Normalization of CSF pressure will be present after venous sinus stenting at 6 months in more than 70% of patients in a cohort of medically refractory IIH patients. (Refractory IIH is defined as absence of improvement in papilledema, visual function or headache after three months of medical treatment or intolerance to the medical regimen). A complementary hypothesis is that the mean decrease in CSF pressure post stenting will be equal or more than 15 mmHg. The proposed research is a prospective cohort study that will be aimed to assess the efficacy of venous stenting by normalizing CSF pressure and improving symptoms of quality of life in patients with medically refractory IIH. Concomitantly; it will also estimate its recurrence and complications rate. The study will be conducted locally at The Ottawa Hospital with an aim of enrolling 33 patients into the trial. Interventions The goal of this study is to assess the overall efficacy of venous stenting to normalize patients CSF pressure with little or no risk. The premise of the study is that opening the venous sinus will reduce the patient's intracranial pressure and improve their visual capabilities. Therefore; the aim of treatment is to improve the patient's overall symptomology related to IIH. The interventionalist and the interventional team can not be blinded to any of the study procedures or study materials used in this trial. Patients who undergo stenting of their venous system will have venous pressure measurements taken. If the degree of stenosis is more than 50% with a difference in pressure in the CSF of more than 8 mmHg, the patient will be stented. Venous pressure measurements and transverse sinus stenting First step: Venous pressure measurements Once the patient is under local anesthesia, femoral venous puncture for cerebral venogram will be performed. Once femoral venous access has been obtained, catheterization of the right or left jugular vein is performed. Microcatheterization of the sinus and venous pressure measurements distal and proximal to the stenosis are done. Second step: Procedure In preparation for stent, patients will receive Aspirin 81mg daily and Clopidogrel (Plavix ®) 75 mg daily for 4 days prior to the intervention. On the day of the procedure, the patient will receive a general anesthesia plus a bolus of heparin (70UI/Kg). Endovascular Intervention: A venous femoral puncture will be completed to allow for a 6-8 French long sheath placement followed by retrograde catheterization of the right or left jugular vein. Deployment of the stent across the stenosis with or without venous angioplasty will be done. Hemostasis with manual compression is completed at the end of the procedure. After the procedure the patients are admitted overnight for monitoring (on neurosurgery unit). Patients will be discharged home 24 hours after the procedure and will continue Aspirin and Clopidogrel (Plavix®) 75mg every day x 3 month then aspirin only.

6. Conditions and Keywords

Primary Disease or Condition Being Studied in the Trial, or the Focus of the Study
Idiopathic Intracranial Hypertension
Keywords
stenting venous sinus, intracranial hypertension, quality of life, headache, visual impairment

7. Study Design

Primary Purpose
Treatment
Study Phase
Not Applicable
Interventional Study Model
Single Group Assignment
Masking
None (Open Label)
Allocation
N/A
Enrollment
33 (Anticipated)

8. Arms, Groups, and Interventions

Arm Title
Neurointerventional
Arm Type
Experimental
Arm Description
Stenting of the venous sinus is the neuro-interventional treatment that is being offered to patients with idiopathic intracranial hypertension that are refractory to medical management.
Intervention Type
Procedure
Intervention Name(s)
Stenting of the venous sinus
Other Intervention Name(s)
Carotid Wall Stent
Intervention Description
Patients with medically refractory idiopathic intracranial hypertension who meet the eligibility criteria will be offered stenting of their venous sinus in effort to reduce their intracranial pressure and improve their visual capabilities.
Primary Outcome Measure Information:
Title
Normalized CSF pressure post venous stenting
Description
The primary outcome will be normalization of CSF pressure after venous stenting at 6 months in more than 70% of the patients in a cohort of medically refractory IHH (idiopathic intracranial hypertension) patients.
Time Frame
1,3,6,12 months
Secondary Outcome Measure Information:
Title
Assess the long-term success of this treatment in terms of clinical recurrence rate and long-term patency of the sinus.
Description
The secondary outcomes will consist of safety data (number of adverse events and severity of adverse events. Morbidity and mortality will be considered as secondary endpoints. A morbid event will be defined as an adverse event of any severity being possibly and probably related to the disease or the treatments and happening during the twelve-month follow-up period.
Time Frame
1,3,6,12 months
Other Pre-specified Outcome Measures:
Title
Assess the effect of stenting in improving visual function in patients with refractory IIH.
Time Frame
1,3,6,12 months
Title
Assess the effect of stenting in decreasing headache and its effect on quality of life.
Time Frame
1,3,6,12 months
Title
Assess the safety of this treatment in terms of clinical and angiographic complications.
Time Frame
every 6 months
Title
Assess the long-term success of this treatment in terms of clinical recurrence rate and long-term patency of the sinus.
Time Frame
1,3,6,12 months
Title
Assess any improvement or absence of papilledema.
Time Frame
1,3,6,12 months

10. Eligibility

Sex
All
Minimum Age & Unit of Time
18 Years
Maximum Age & Unit of Time
80 Years
Accepts Healthy Volunteers
No
Eligibility Criteria
Inclusion Criteria: Age > 18 year-old, living in Ontario, Canada Patient with diagnostic of Idiopathic Intracranial Hypertension, who failed medical treatment. Venous imaging showing bilateral transverse sinus stenosis or unilateral transverse sinus stenosis with contralateral transverse sinus atresia. Pressure gradient across the stenosis > 8 mmHg Signed informed consent obtained from the patient Exclusion Criteria: Allergic reaction to iodine contrast despite premedication Contraindication to general anesthesia, Contraindication to Aspirin, Clopidogrel (Plavix®) or anticoagulants Patient with medical history of intracranial venous thrombosis Pregnant women
Central Contact Person:
First Name & Middle Initial & Last Name or Official Title & Degree
Daniela Iancu, MD
Phone
613-798-5555
Ext
17314
Email
diancu@toh.ca
First Name & Middle Initial & Last Name or Official Title & Degree
Betty Anne Schwarz, DProf
Phone
613-798-5555
Ext
17522
Email
baschwarz@toh.ca
Facility Information:
Facility Name
The Ottawa Hospital Civic Campus
City
Ottawa
State/Province
Ontario
ZIP/Postal Code
K1Y 4E9
Country
Canada
Individual Site Status
Recruiting
Facility Contact:
First Name & Middle Initial & Last Name & Degree
Daniela Iancu, MD
Phone
613-798-5555
Ext
78571
Email
diancu@toh.ca
First Name & Middle Initial & Last Name & Degree
Betty Anne Schwarz, DProf
Phone
613-798-5555
Ext
17522
Email
baschwarz@toh.ca
First Name & Middle Initial & Last Name & Degree
Daniela Iancu, MD
First Name & Middle Initial & Last Name & Degree
Lucian Sitwell, MD
First Name & Middle Initial & Last Name & Degree
Zackon David, MD
First Name & Middle Initial & Last Name & Degree
Danah AlBreiki, MD
First Name & Middle Initial & Last Name & Degree
Betty Anne Schwarz, DProf
First Name & Middle Initial & Last Name & Degree
Carlos Torres, MD

12. IPD Sharing Statement

Learn more about this trial

Stenting of Venous Sinus Stenosis for Medically Refractory Idiopathic Intracranial Hypertension

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