COGNIShunt® System for Alzheimer's Disease

Alzheimer Disease Clinical Trial

Official title: Study to Evaluate the Effect of Flow-Regulated Ventriculoperitoneal Shunting on Progression of Alzheimer's Disease: An Investigation of the Safety and Effectiveness of the COGNIShunt® CNS Shunt System

Status Completed

Clinical Trial Summary

This is a study of the effect on the progression of Alzheimer's Disease of a surgically implanted shunt (tube) to increase the flow of cerebrospinal fluid and improve the clearance of potential neurotoxins from the fluid bathing the brain.

Clinical Trial Description

Cerebrospinal fluid (CSF) is the protective fluid that fills the empty spaces around the brain and spinal cord. CSF is naturally produced and absorbed, but with age abnormal metabolism and clearance of amyloid beta proteins can lead to accumulation of these proteins, resulting in plaque formation, a leading contributor to the progression of Alzheimer's disease (AD). The shunt treatment is designed to drain CSF with these toxic elements from the skull and allow replenishment of normal CSF. This clinical study is designed to determine if this device will stop or slow the progression of Alzheimer's disease.

The COGNIShunt® System is a proprietary device designed to increase the flow of cerebrospinal fluid (CSF) and improve clearance of putative neurotoxins from the CSF that are believed to contribute to the progression of Alzheimer's disease symptoms. This clinical study is designed to determine if this device will stop or slow the progression of Alzheimer's disease. The pivotal study is a prospective, randomized double-blinded, placebo-controlled trial to evaluate the effect of flow-regulated ventriculoperitoneal CSF drainage with the COGNIShunt® system on cognitive and clinical function in approximately 250 participants with Alzheimer's Disease (NINDS/ADRDA criteria). Study participants will be permitted to continue anti-dementia drug therapy if their drug regime has been stable for 3 months prior to entry. This is a two-part study. In Part I, participants will be randomized to receive either a functioning COGNIShunt® System (test/intervention group) or an occluded shunt (control/placebo group). The duration of Part I is nine months, to be followed by an extension phase of an additional 9 months, constituting Part II. During Part II, subjects with occluded shunts have the opportunity to receive a functioning COGNIShunt®, so that all study participants may have open devices during Part II. The total duration of the study is 18 months. Visits to the site include: for screening and baseline (may be done in one or two visits); surgery; and a visit the 1st, 3rd, 6th, 9th, 12th, 15th, and 18th month after surgery. ;

Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Double-Blind, Primary Purpose: Treatment

Related Conditions & MeSH terms

• Alzheimer Disease

• NCT number: NCT00056628
• Study type: Interventional
• Source: National Institute on Aging (NIA)
• Status: Completed
• Phase: Phase 3
• Start date: January 2001
• Completion date: October 2004