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Clinical trialNCT03347955CompletedInterventional

Double-blind Placebo Surgery Trial for Treatment of Parkinson's Disease

SponsorUniversity of DenverEnrollment40Parkinson DiseaseSurgery
View the registry record on ClinicalTrials.gov

Summary

The lay summary the sponsor registered on ClinicalTrials.gov.

A double-blind sham surgery-controlled trial was developed to determine the effectiveness of implantation of human embryonic dopamine neurons into the putamen of patients with advanced Parkinson's disease (PD), with half the patients receiving the implant (n = 20) and half receiving sham surgery (n = 20). The blind was maintained for 12 months before participants were told which surgery they received, at which time those receiving sham surgery could request the implant surgery.
clinicaltrials.gov ↗

Investigators

The overall officials registered on this study. Names that resolve to a findmyKOL profile link to it; the rest are shown as registered.

A profile link is shown only when the registered name resolves to a person record with a confident, namesake-checked match; ambiguous names stay unlinked.

Sites

1 registered facility, with the per-site recruitment status where the registry publishes one. ClinicalTrials.gov does not publish per-site enrollment counts.

United States
  • Morgridge College of Education, University of Denver

    Denver, Colorado, United States

Site investigator names are published by ClinicalTrials.gov only while a study recruits, so completed studies list sites without them.

Drugs studied

No drug or biological interventions are in our data for this study. It may test a procedure, device or behavioral intervention, or the intervention list isn't in our current snapshot. See the registry record ↗. Why? →

Registration & key dates

Registry attributes as recorded on the ClinicalTrials.gov study record.

Start
30 Nov 1994
Primary completion
28 Feb 1999
Completion
28 Feb 1999
Last update posted
20 Nov 2017
Registered enrollment
40
Registry id
NCT03347955
clinicaltrials.gov ↗

Source: ClinicalTrials.gov, via the CTTI AACT database, data as of 24 Aug 2026. Registry facts are shown as registered by the study sponsor; findmyKOL does not interpret them.