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Dexmedetomidine vs Propofol on the Recordings of Deep Brain Activity Measured Through Implanted Stimulators

NCT02256319 · Status: COMPLETED · Phase: PHASE4 · Type: INTERVENTIONAL · Enrollment: 12

Last updated 2015-12-18

No results posted yet for this study

Summary

This clinical trial has been designed to study and compare changes in deep brain activity (field potentials) in Parkinson's disease (PD) patients while awake, and during sedation with dexmedetomidine or propofol. The recording is made through a deep brain stimulation (DBS) electrode implanted for PD management.

The investigators hypothesize that dexmedetomidine produces fewer changes as compared to propofol, and that those changes are consistent and recognizable when compared to activity in patients not exposed to any sedation. Typification of those changes would in the future allow for patients to undergo this surgery comfortably while not compromising the quality of the recording and of the final clinical outcome. The principal variable analyzed is the signal's power in each of the frequency bands, absolute and relative. The analysis will include usual clinical methods such as rapid Fourier transform (FFT) and window fast Fourier transform (WFFT), wavelet analysis, Gabor, and coherence.

Conditions

Interventions

DRUG

Dexmedetomidine

Patients will receive a loading dose of 1 µg/kg in 10 min before starting the surgery. The maintenance dose will be 0.2-1 µg/kg/h for a Ramsey Sedation Score of 3-4 during the surgery´s preparation. It will be reduced to 0.2 µg/kg/h 15 min before starting the microelectrode recording for a Ramsey Sedation Score of 2. After the placement of the deep brain stimulator we will record the local field potentials activity. In addition, the subscales of rigidity, tremor and bradykinesia of the Unified Parkinson's Disease Rating Scale (UPDRS-III) score will be evaluated. Once the deep brain stimulator recording and neurologic exploration will be over patients will receive a maintenance dose 0.2-1 µg/kg/h until the end of the surgery. It will be stopped to transfer the patient to the ICU.

DRUG

Propofol

The target doses are 0.5, 1, 1.5, 2 and 2.5 µg/kg. For its administration we will use the TCI (target controlled infusion) system. After programming each dose we will wait until the plasma and brain concentration of propofol are stabilized in this target and then we will record the local field potentials activity through the DBS. In addition, the subscales of rigidity, tremor and bradykinesia of the UPDRS-III score will be evaluated.

Sponsors & Collaborators

  • Clinica Universidad de Navarra, Universidad de Navarra

    lead OTHER

Principal Investigators

  • Martínez S Antonio, Doctor · Staff of the deparment of Anestesiology

Study Design

Allocation
NON_RANDOMIZED
Purpose
SUPPORTIVE_CARE
Masking
NONE
Model
CROSSOVER

Eligibility

Min Age
18 Years
Sex
ALL
Healthy Volunteers
No

Timeline & Regulatory

Start
2014-09-30
Primary Completion
2015-12-31
Completion
2015-12-31

Countries

  • Spain

Study Locations

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Entities

Diseases

Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT02256319 on ClinicalTrials.gov