- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05707442
Stent Implantation Versus Medical Therapy for Idiopathic IntracraniaL Hypertension (SIMPLE)
February 14, 2023 updated by: Dapeng Mo, Beijing Tiantan Hospital
The aim of this study is to assess the efficacy of stent implantation versus medical therapy on idiopathic intracranial hypertension with venous sinus stenosis.
Study Overview
Status
Recruiting
Intervention / Treatment
Detailed Description
The SIMPLE is a multicentered, prospective, randomized, open-label, blinded end-point clinical trial.
A total of 74 patients with idiopathic intracranial hypertension (IIH) and venous sinus stenosis (VSS) for more than 2 months will be enrolled.
Patients fulfilling all of the inclusion criteria and none of the exclusion criteria will be randomized 1:1 into two groups (stenting or medical therapy) after offering informed content.
Study Type
Interventional
Enrollment (Anticipated)
74
Phase
- Phase 3
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Beijing
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Beijing, Beijing, China, 100010
- Recruiting
- Beijing Tiantan Hospital
-
Contact:
- Dapeng Mo, MD
- Phone Number: +8613691419036
- Email: modapeng1971@163.com
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-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years to 60 years (Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
Subject Eligibility Criteria
- Diagnosis of IIH by modified Dandy criteria for more than 2 months
- Lumbar puncture opening pressure ≥250 mmH₂O within 6 weeks before enrollment
- Normal cerebrospinal fluid (CSF) composition
- Neuroimaging showing normal brain parenchyma without hydrocephalus, mass, or any structural lesion and no evidence of meningeal enhancement on CT or MRI
- Localized venous sinus stenosis (VSS) with stenotic degree ≥ 50% on DSA, and pressure gradient across stenosis ≥ 8 mmHg
- Patients or their relatives signed written informed consent
Ophthalmic Eligibility Criteria:
- At least one eye had the presence of papilledema
- At least one eye of visual field loss: PMD ranging from - 2dB and below; decreased visual function on automated perimetry was reproducible with a false-positive rate of no more than 15%
- Visual acuity above 20 / 200 (≥ 39 letters)
Exclusion Criteria:
Subject Exclusion Criteria
- Previous surgery for IIH, including optic nerve sheath fenestration (ONSF), CSF shunting, decompressive craniectomy or venous sinus stenting
- Visual loss due to other etiologies (eg, retinal drusen, retinal and optic neuropathy, cataracts, etc)
- Other condition requiring the use of diuretics, steroids or other drugs to reduce intracranial pressure
- DSA showed diffused venous sinus stenosis, cortical or deep vein stenosis
- A history of severe thyroid disease and iodine allergy
- Pregnant or lactating women
- Severe cardiopulmonary, liver or kidney failure
- Known hereditary or acquired haemorrhagic diathesis
- Known hereditary or acquired thrombophilia
- Platelet counts or coagulation abnormality
- Major surgery or severe trauma or any traumatic brain injury within the previous 14 days
- A history of cerebral hemorrhage, arteriovenous malformation, intracranial aneurysm or tumor
- Other life threatening illness (eg, advanced cancer) likely to lead to death within a few months; the physical, psychological and social status of patients may affect follow-up (eg, drug addiction, advanced malignant disease, no telephone, no family, etc); cannot tolerate general anesthesia
- Increased intracranial pressure due to other secondary factors
Ophthalmic Exclusion Criteria:
- Current intraocular pressure > 28mmHg or previous intraocular pressure > 30mmHg
Refractive error spherical power greater than -6.0D or +6.0D and astigmatism greater than 3.0D, except for the following cases:
- Myopia of - 6.0D to - 8.0D with the following: 1)There was no myopia related disease that can lead to decreased vision under the eyeground microscope (eg, scleral staphyloma, retinal thinning at the posterior pole, and moderate to severe disc tilt); 2) The patient wore contact lenses of appropriate degree for all visual field examinations.
- Hyperopia of +6.0D to +8.0D with the following: 1) The presence of a well characterized peri optic disc edematous halo, as opposed to crowded small optic discs or other features of decreased visual acuity associated with hyperopic changes, was at the discretion of the site investigator or reading center leader (or his designee); 2) The patient wore contact lenses of appropriate degree for all visual field examinations.
- Examination visible or past medical history known to have large optic disc drusen (persistent optic disc edema can present with small optic disc drusen, as low numbers are acceptable for inclusion and to be determined by the investigator to be unrelated to vision loss)
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Single
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Stent Implantation
The endovascular procedure was performed under general anesthesia.
Intravenous heparin was administered during the stent procedure to increase the activated clotting time to > 250 s.
An 8F guiding catheter was delivered to the internal jugular vein near the skull base.
A 6F Navien intermediate guide catheter was then placed into the distal transverse sinus near the torcula through the 8F guiding catheter.
A microguidewire was navigated across the stenosis using a microcatheter, followed by the deployment of a self-expanding stent (eg, Precise or Wallstent) adjusted to the normal sinus venous diameter adjacent to the stenosis.
Venography and manometry were performed after the procedure.
|
Aspirin (100 mg) and clopidogrel (75 mg) were administered 3-5 days before endovascular treatment.
The endovascular procedure was performed under general anesthesia.
Intravenous heparin was administered during the stent procedure to increase the activated clotting time to > 250 s.
An 8F guiding catheter was delivered to the internal jugular vein near the skull base.
A 6F Navien intermediate guide catheter was then placed into the distal transverse sinus near the torcula through the 8F guiding catheter.
A microguidewire was navigated across the stenosis using a microcatheter, followed by the deployment of a self-expanding stent (eg, Precise or Wallstent) adjusted to the normal sinus venous diameter adjacent to the stenosis.
Venography and manometry were performed after the procedure.
Postoperatively, all patients received dual antiplatelet medications for 3 months and then received a single antiplatelet (either aspirin or clopidogrel).
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Active Comparator: Medical Therapy
The medical treatment consisted of acetazolamide (0.5-4 g/day) and short-term mannitol (bolus of 0.25-1 g/kg body weight) for a duration of about 1 week or repeated lumbar punctures to reduce intracranial pressure (20 mL each), as well as analgesics for headaches.
The initial dosage of acetazolamide was 0.5 g daily in two divided doses, followed by dosage increases of one tablet every week up to a maximum dosage of 4 g/day.
The dosage escalation was stopped if the participant had papilledema grade <1 in both eyes, unless the presence of other symptoms such as headache or tinnitus suggested that the dosage escalation should continue.
The dosage for the participants who were unable to tolerate the study drug was decreased gradually to a minimum of one half tablet daily.
In addition, the weight loss program included a low-calorie diet (≤425 kcal/day) with a target weight loss of approximately 5-10%.
|
The medical treatment consisted of acetazolamide (0.5-4 g/day) and short-term mannitol (bolus of 0.25-1 g/kg body weight) for a duration of about 1 week or repeated lumbar punctures to reduce intracranial pressure (20 mL each), as well as analgesics for headaches.
The initial dosage of acetazolamide was 0.5 g daily in two divided doses, followed by dosage increases of one tablet every week up to a maximum dosage of 4 g/day.
The dosage escalation was stopped if the participant had papilledema grade <1 in both eyes, unless the presence of other symptoms such as headache or tinnitus suggested that the dosage escalation should continue.
The dosage for the participants who were unable to tolerate the study drug was decreased gradually to a minimum of one half tablet daily.
The weight loss program included a low-calorie diet (≤425 kcal/day) with a target weight loss of approximately 5-10%.
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What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Perimetric Mean Deviation (PMD)
Time Frame: 6 months
|
The change in perimetric mean deviation (PMD) from baseline to 6 month in the eye with the most severe visual loss at baseline.
|
6 months
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Cerebrospinal Fluid (CSF) Opening Pressure
Time Frame: 6 months
|
The change in intracranial pressure measured by lumbar puncture opening pressure from baseline to 6 months.
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6 months
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Papilledema Grade: Frisén grade(0-5 scores,and higher scores mean worse outcome)
Time Frame: 6 months
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The change in papilledema measured by Frisén grade from baseline to 6 months
|
6 months
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Retinal Nerve Fiber Layer Thickness
Time Frame: 6 months
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The change in thickness of retinal nerve fiber layer measured by optical coherence tomography (OCT) from baseline to 6 months.
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6 months
|
Total Retinal Thickness
Time Frame: 6 months
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The change in thickness of total retina measured by optical coherence tomography (OCT) from baseline to 6 months.
|
6 months
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Visual Acuity: National Eye Institute-Visual Function Questionnaire-25 (NEI-VFQ-25, minimum and maximum values: 0-100 points, higher scores mean a better visual function)
Time Frame: 6 months
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The change in vision measured by National Eye Institute-Visual Function Questionnaire-25 (NEI-VFQ-25) from baseline to 6 months.
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6 months
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Visual Acuity: 10-item neuro-ophthalmic supplement to the National Eye Institute-Visual Function Questionnaire-25 (NEI-VFQ-25) (minimum and maximum values: 0-100 points, higher scores mean a better visual function)
Time Frame: 6 months
|
The change in vision measured by 10-item neuro-ophthalmic supplement to the National Eye Institute-Visual Function Questionnaire-25 (NEI-VFQ-25)from baseline to 6 months.
|
6 months
|
Headache: Headache Impact Test-6 (HIT-6, minimum and maximum values: 36-78 points, higher scores mean greater headache severity)
Time Frame: 6 months
|
The change in headache measured by Headache Impact Test-6 (HIT-6) questionnaire from baseline to 6 months.
|
6 months
|
Pulsatile tinnitus: Tinnitus Handicap Inventory (THI, minimum and maximum values: 0-100 points, higher scores mean more serious tinnitus disability)
Time Frame: 6 months
|
The change in pulsatile tinnitus from baseline to 6 months;pulsatile tinnitus was assessed using the Tinnitus Handicap Inventory (THI), which is a self-report measure that can be used in a busy clinical practice to quantify the impact of tinnitus on daily living.
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6 months
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Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Functional health status and quality of life:EuroQol five dimensions questionnaire (EQ-5D,0-100,higher scores mean a better outcome)
Time Frame: 6 months
|
The change in functional health status and quality of life measured by EuroQol five dimensions questionnaire (EQ-5D) from baseline to 6 months
|
6 months
|
Cost-effectiveness analysis (mean costs per patient)
Time Frame: 6 months
|
The indicator of cost-effectiveness analysis refers to the mean costs per patient.
|
6 months
|
Cost-effectiveness analysis (quality-adjusted life years)
Time Frame: 6 months
|
The indicator of cost-effectiveness analysis refers to the quality-adjusted life years.
|
6 months
|
Cost-effectiveness analysis (the cost saving per extra patient with a good outcome)
Time Frame: 6 months
|
The indicator of cost-effectiveness analysis refers to the cost saving per extra patient with a good outcome.
|
6 months
|
Cost-effectiveness analysis (the cost saving per additional quality-adjusted life year)
Time Frame: 6 months
|
The indicator of cost-effectiveness analysis refers to the cost saving per additional quality-adjusted life year.
|
6 months
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Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
October 31, 2022
Primary Completion (Anticipated)
June 1, 2024
Study Completion (Anticipated)
December 1, 2024
Study Registration Dates
First Submitted
December 25, 2022
First Submitted That Met QC Criteria
January 28, 2023
First Posted (Actual)
February 1, 2023
Study Record Updates
Last Update Posted (Estimate)
February 16, 2023
Last Update Submitted That Met QC Criteria
February 14, 2023
Last Verified
February 1, 2023
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
- Cardiovascular Diseases
- Vascular Diseases
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Hypertension
- Hypotension
- Intracranial Hypertension
- Pseudotumor Cerebri
- Intracranial Hypotension
- Physiological Effects of Drugs
- Molecular Mechanisms of Pharmacological Action
- Enzyme Inhibitors
- Carbonic Anhydrase Inhibitors
- Natriuretic Agents
- Diuretics
- Anticonvulsants
- Acetazolamide
Other Study ID Numbers
- HX-A-2022042
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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