- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT05376761
EC50 of Dexmedetomidine in Deep Brain Stimulation Implantation of Patients With Parkinson's Disease
Median Effective Concentration (EC50) of Dexmedetomidine in Deep Brain Stimulation Implantation of Patients With Parkinson's Disease
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Deep brain stimulation (DBS) is an effective treatment to improve the motor symptoms of Parkinson's disease (PD). Subthalamic nucleus (STN) is one of the most commonly used targets in the treatment of PD-DBS. The accuracy of the final implantation position of deep brain electrodes is the key to the success of surgery.
Sedation-Awake-Sedation anesthesia is widely used in DBS. Dexmedetomidine (DEX) mainly acts on the central locus coeruleus nucleus and spinal cord α receptor, which has sedative and analgesic effect and little respiratory inhibition. DEX can produce natural non eye movement sleep that is conducive to the recovery of the body. Within a certain dose range, patients are easy to wake up and have the characteristics of conscious sedation. Patients can make corresponding actions according to the instructions of neurosurgeons and cooperate with doctors to complete the operation. Its sedative safety has been confirmed.
However, intraoperative application of DEX may delay the recovery of cognitive function, affect the discharge activity of deep brain nuclei and reduce the discharge frequency of STN neurons, even after stopping the use of sedatives. The result may be related to the residual effect of sedatives. DEX can reduce the activity of STN neurons in a dose-dependent manner. A smaller dose of DEX may not meet the effects of surgical sedation and analgesia, and the effect of high concentration is better than that of low concentration. Some existing studies have recommended a reasonable dose range of DEX for DBS, but these studies have a small number of research populations, and of great heterogeneity in target selection, anesthetic dose and strategy. At present, there is still a lack of prospective intervention research to explore the optimal dose that the application of DEX sedation does not affect MER mapping in patients with Parkinson's disease. The present study uses the up and down method to analyze the EC50 and EC95 of DEX in patients with PD undergoing STN-DBS sedation, to clarify the balance meets the sufficient comfort of patients without affecting the accurate target of MER and the optimal dosage of DEX for boundary recognition.
Study Type
Enrollment (Anticipated)
Phase
- Phase 4
Contacts and Locations
Study Locations
-
-
Beijing
-
Beijing, Beijing, China
- Recruiting
- Beijing Tiantan Hospital
-
Contact:
- Si-Ning Xie
- Email: xiesining101@sina.com
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- 50-80 years old, ASA grade II-III;
- Bilateral STN-DBS of patients with Parkinson's disease;
- Signed informed consent.
Exclusion Criteria:
- Obstructive sleep apnea;
- BMI > 30kg/m2;
- Estimated difficult airway;
- Severe preoperative anxiety;
- Serious dysfunction of important organs such as heart, liver and kidney;
- previous allergy to dexmedetomidine;
- Pregnant or lactating women.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Other
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: DEX for STN-DBS
|
The loading dose of DEX (0.5 µg/kg) is transfused intravenously within 15min.The maintaining concentration of DEX, which is started at 0.3 µg/kg/h in the first patient, is determined by the NRMS in the MER signal of the previous patient according to the up and down sequence.
If the NRMS is higher than 2.0, a positive response is defined and the concentration of DEX will be added by 0.05µg/kg/h in the next patient.
A negative response is defined as NRMS lower than 2.0, and in such cases the concentration of DEX is reduced by 0.3 µg/kg/h.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
EC50 and the corresponding 95%CI of DEX applied to PD patients undergoing STN-DBS are determined by the up and down method according to the normalized root mean square(NRMS) value of the MER sampled signal.
Time Frame: during MER recording
|
We use the root mean square (RMS) value of the MER sampled signal recorded by the electrode, measured in volts, as the main parameter for evaluating electrode position. RMS values change with the electrode properties and other external drives related to the operating room; therefore, it is crucial to normalize the RMS to comparable values. Thus, each session's RMS in a trajectory is divided by the mean RMS of the first five stable sessions in the same trajectory. This normalized RMS (NRMS) is found to be a good measure as it reflects the relative change in the total power of the signal, which elevates dramatically entering the STN. If the NRMS is higher than 2.0, a positive response is defined and the concentration of DEX will be added by 0.05µg/kg/h in the next patient. A negative response is defined as NRMS lower than 2.0, and in such cases the concentration of DEX is reduced by 0.3 µg/kg/h. |
during MER recording
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
STN pass length (mm)
Time Frame: during MER recording
|
For STN identification and length, recordings within the thalamus, zona incerta, STN, and SNr are identified by an experienced neurophysiologist intraoperatively and reclassified independently offline.
The STN pass length is determined as the distance from entry to exit of the STN based on the significant, clear increase in baseline unit activity and FR changes unique to STN.
|
during MER recording
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Brain Diseases
- Central Nervous System Diseases
- Nervous System Diseases
- Parkinsonian Disorders
- Basal Ganglia Diseases
- Movement Disorders
- Synucleinopathies
- Neurodegenerative Diseases
- Parkinson Disease
- Physiological Effects of Drugs
- Adrenergic Agents
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Central Nervous System Depressants
- Peripheral Nervous System Agents
- Analgesics
- Sensory System Agents
- Analgesics, Non-Narcotic
- Adrenergic alpha-2 Receptor Agonists
- Adrenergic alpha-Agonists
- Adrenergic Agonists
- Hypnotics and Sedatives
- Dexmedetomidine
Other Study ID Numbers
- xsn20220314
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
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.
Clinical Trials on PD - Parkinson's Disease
-
University of FloridaCompletedParkinson Disease (PD)United States
-
Chang Gung UniversityCompleted
-
AbbVieActive, not recruitingParkinson's Disease (PD)United States, Australia
-
AbbVieCompletedParkinson's Disease (PD)United States, Australia
-
Baylor College of MedicineCompletedIdiopathic Parkinson's Disease (PD)United States
-
AbbVieRecruitingParkinson's Disease (PD)Germany, Denmark, Spain
-
Beijing Tiantan HospitalRecruitingPD - Parkinson's DiseaseChina
-
AbbVieActive, not recruitingParkinson's Disease (PD)United States, Australia, Belgium, Canada, Denmark, Germany, Italy, Japan, Netherlands, Russian Federation, Spain, Sweden, United Kingdom
-
AbbVieRecruiting
-
AbbVieCompletedParkinson's Disease (PD)United States, Australia, Belgium, Canada, Denmark, Germany, Italy, Japan, Netherlands, Russian Federation, Spain, Sweden, United Kingdom
Clinical Trials on Dexmedetomidine
-
Cairo UniversityUnknownSpinal Anesthesia DurationEgypt
-
Guangzhou Women and Children's Medical CenterCompletedAmbulatory Surgical ProceduresChina
-
The First Affiliated Hospital with Nanjing Medical...CompletedPostoperative Pain | Breast Feeding | Analgesia ObstetricalChina
-
Seoul National University Bundang HospitalCompleted
-
Guangzhou General Hospital of Guangzhou Military...CompletedPharmacodynamic InteractionChina
-
University Hospital DubravaRecruitingAortic Valve Stenosis | Systemic Inflammatory ResponseCroatia
-
Guangzhou General Hospital of Guangzhou Military...Completed
-
First Affiliated Hospital, Sun Yat-Sen UniversityUnknownArteriovenous MalformationChina
-
Guangzhou General Hospital of Guangzhou Military...UnknownCombined Spinal-epidural AnesthesiaChina
-
National Cancer Institute, EgyptCompleted