Clinical trial NCT06833424: Dural Venous Sinus Stent in Idiopathic Intracranial Hypertension
Official title: Predictors of Dural Venous Sinus Stenting in Idiopathic Intracranial Hypertension Patients and Outcomes
Study type: INTERVENTIONAL
Overall status: NOT_YET_RECRUITING
Phase: NA
Conditions: Idiopathic Intracranial Hypertension (IIH)
Keywords: predictors and outcomes
Lead sponsor: Assiut University
Sponsor class: OTHER
First posted: 2025-02-18
Enrollment: 40
Sex: ALL
Minimum age (years): 18
Maximum age (years): 60
Standard ages: ADULT
Accepts healthy volunteers: yes
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: This study aims to identify clinical determinants and factors that predict outcome including primary outcome and secondary outcome depending on factors in individual patients with Idiopathic intracranial hypertension treated by Dural venous sinus stenting.

Detailed description: Idiopathic intracranial hypertension (IIH) has long been associated with the hallmark clinical triad of headaches, papilledema, and visual loss in the absence of neurologic signs (except possible CN VI palsy), Hydrocephalus or intracranial masses on CT or MRI. findings without evidence of thrombosis; lumbar puncture opening pressure of \>25 cmH2O; normal biochemical and cytological composition of the CSF. The overall age-adjusted and gender-adjusted annual incidence is increasing and was reported to be 2.4 per 100 000 within the last decade (2002-2014).A variety of aetiologies have been suggested to explain the pathophysiology behind IIH, including meningeal inflammation, metabolic disturbances (e.g., hyper- or hypoadrenalism and hypoparathyroidism), medication effects (e.g., excess vitamin A, corticosteroids, and tetracycline), and cerebral venous hypertension.Imaging of patients with IIH is traditionally performed to exclude lesions that produce intracranial hypertension. MR imaging features of IIH include posterior globe flattening, a protrusion of the subarachnoid space in the cavum sellae (Empty Sella), distension of the preoptic subarachnoid space, enhancement of the prelaminar optic nerve, vertical tortuosity of the orbital optic nerve, and intraocular protrusion of the prelaminar optic nerve. Although these findings support the presence of elevated ICP and, thus, the diagnosis of IIH, they are not predictive of the severity of visual loss, and their absence does not exclude the diagnosis. It should not guide a specific management of patients with IIH .

The first line of treatment for IIH consists of weight loss and/or medical therapy including diuretics such as acetazolamide. When medical treatment fails, surgical options include cerebrospinal fluid (CSF) diversion via ventriculoperitoneal (VP) or lumboperitoneal (LP) shunting or optic nerve sheath fenestration. Recently, another etiology of cerebral venous hypertension has garnered increasing attention as a putative cause of IIH, cerebral venous Dural sinus stenosis. In medically refractory IIH patients with a physiologic pressure gradient across venous stenosis, cerebral venous stenting has emerged as an alternative treatment to traditional surgical approaches.

Transverse sinus stenosis can be seen in 2 morphologic forms: an extrinsic smooth gradually narrowing tapered stenosis and intrinsic discrete obstructions, presumably due to arachnoid granulations or fibrous septae. While intrinsic transverse sinus stenosis might cause IIH by completely occluding the transverse sinus, the extrinsic compression resolves with CSF drainage. might be secondary to intracranial hypertension. Venous sinus stenting (VSS) reduces intracranial venous pressures and improves idiopathic intracranial hypertension (IIH) symptoms.

Eligibility criteria: Inclusion Criteria:

* 40 Patients of idiopathic intracranial hypertension subjected to Dural venous sinus stenting met the modified Dandy criteria for (IIH).

  1. Signs and symptoms of increased intracranial pressure: Headaches, nausea, vomiting, visual changes, and papilledema.
  2. No localizing or focal neurologic signs: Except for possible unilateral or bilateral VI nerve paresis.
  3. Elevated cerebrospinal fluid (CSF) pressure: Without cytologic or chemical abnormalities.
  4. No etiology for increased intracranial pressure: On neuroimaging findings.

     * Age: 18-60 years
     * Gender: Male or Female Inclusion Criteria.

Exclusion Criteria

1. Age less than or equal to 18 years.
2. severe allergic reaction to iodine contrast or chronic Kidney disease.
3. contraindication to general anesthesia or antiplatelet anticoagulants, Hemorrhagic Diathesis
4. patients with secondary causes of intracranial hypertension: Dural arteriovenous fistula or other arteriovenous lesion affecting cortical venous flow.
5. pregnancy.

Primary outcomes:
measure: change in headache impact scale(HIT-6)
timeFrame: 3, 6 months
measure: Papilledema Friesen grading scale
timeFrame: 3 months and 6 months
measure: Visual filed Assessment Perimetry
timeFrame: 3,6 months
measure: Changes in other symptoms tinnitus, abducent nerve palsy and Transient visual Obsecuration
timeFrame: 3,6 months
Secondary outcomes:
measure: Stent Patency and pressure change
timeFrame: 6 months
measure: stent Patency
timeFrame: 6 months
measure: Safety outcome measures
timeFrame: 10 days
measure: Quality of life improvement
timeFrame: 3,6 months
Other outcomes:
Locations:
city: Assiut
country: Egypt
facility: Faculty of Medicine
Study officials:
References:
citation: Hilvert AM, Gauhar F, Longo M, Grimaudo H, Dugan J, Mummareddy N, Chitale R, Froehler MT, Fusco MR. Venous sinus stenting versus ventriculoperitoneal shunting: comparing clinical outcomes for idiopathic intracranial hypertension. J Neurointerv Surg. 2024 Nov 22;16(12):1264-1267. doi: 10.1136/jnis-2024-022174.
citation: McGonigal A, Bone I, Teasdale E. Resolution of transverse sinus stenosis in idiopathic intracranial hypertension after L-P shunt. Neurology. 2004 Feb 10;62(3):514-5. doi: 10.1212/wnl.62.3.514. No abstract available.
citation: Subramaniam RM, Tress BM, King JO, Eizenberg N, Mitchell PJ. Transverse sinus septum: a new aetiology of idiopathic intracranial hypertension? Australas Radiol. 2004 Jun;48(2):114-6. doi: 10.1111/j.1440-1673.2004.01269.x.
citation: Aguilar-Perez M, Martinez-Moreno R, Kurre W, Wendl C, Bazner H, Ganslandt O, Unsold R, Henkes H. Endovascular treatment of idiopathic intracranial hypertension: retrospective analysis of immediate and long-term results in 51 patients. Neuroradiology. 2017 Mar;59(3):277-287. doi: 10.1007/s00234-017-1783-5. Epub 2017 Mar 2.
citation: Saindane AM, Bruce BB, Riggeal BD, Newman NJ, Biousse V. Association of MRI findings and visual outcome in idiopathic intracranial hypertension. AJR Am J Roentgenol. 2013 Aug;201(2):412-8. doi: 10.2214/AJR.12.9638.
citation: Degnan AJ, Levy LM. Pseudotumor cerebri: brief review of clinical syndrome and imaging findings. AJNR Am J Neuroradiol. 2011 Dec;32(11):1986-93. doi: 10.3174/ajnr.A2404. Epub 2011 Jun 16.
citation: Brodsky MC, Vaphiades M. Magnetic resonance imaging in pseudotumor cerebri. Ophthalmology. 1998 Sep;105(9):1686-93. doi: 10.1016/S0161-6420(98)99039-X.
citation: Kilgore KP, Lee MS, Leavitt JA, Mokri B, Hodge DO, Frank RD, Chen JJ. Re-evaluating the Incidence of Idiopathic Intracranial Hypertension in an Era of Increasing Obesity. Ophthalmology. 2017 May;124(5):697-700. doi: 10.1016/j.ophtha.2017.01.006. Epub 2017 Feb 7.
citation: Starke RM, Wang T, Ding D, Durst CR, Crowley RW, Chalouhi N, Hasan DM, Dumont AS, Jabbour P, Liu KC. Endovascular Treatment of Venous Sinus Stenosis in Idiopathic Intracranial Hypertension: Complications, Neurological Outcomes, and Radiographic Results. ScientificWorldJournal. 2015;2015:140408. doi: 10.1155/2015/140408. Epub 2015 Jun 4.
citation: Friedman DI, Jacobson DM. Diagnostic criteria for idiopathic intracranial hypertension. Neurology. 2002 Nov 26;59(10):1492-5. doi: 10.1212/01.wnl.0000029570.69134.1b.
citation: Radhakrishnan K, Ahlskog JE, Garrity JA, Kurland LT. Idiopathic intracranial hypertension. Mayo Clin Proc. 1994 Feb;69(2):169-80. doi: 10.1016/s0025-6196(12)61045-3.