- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01621620
The Role of Sympatho-vagal Balance on Different Limbs of Pain Perception in Healthy Subjects
objectives
- To study the sympatho-vagal balance effect on different limbs of pain perception.
- To determine whether it is the hypertension by itself or the baroreflex activation due to blood pressure rise that is responsible for the analgesic effect of acute hypertension.
study questions
The study questions are derived from the study objectives:
- Does sympatho-vagal balance influence pain perception?
- Does sympatho-vagal balance influence diffuse noxious inhibitory control systems?
- Does sympatho-vagal balance influence temporal summation?
- Does the hypoalgesic effect to acute increase in blood pressure a result of baroreflex activation?
Study Overview
Detailed Description
Hypothesis
We hypothesize that the activation of the sympathetic system, which leads to increased hypertension, rather than the cholinergic response to increased BP, is responsible for antinociceptive effect of hypertension.
2.b objectives
- To study the sympatho-vagal balance effect on different limbs of pain perception.
- To determine whether it is the hypertension by itself or the baroreflex activation due to blood pressure rise that is responsible for the analgesic effect of acute hypertension.
2.c study questions
The study questions are derived from the study objectives:
- Does sympatho-vagal balance influence pain perception?
- Does sympatho-vagal balance influence diffuse noxious inhibitory control systems?
- Does sympatho-vagal balance influence temporal summation?
- Does the hypoalgesic effect to acute increase in blood pressure a result of baroreflex activation?
3. Subjects and methods
3.a subjects
Every subject will be invited to 2 separate sessions. At least 24 hours will apart the two sessions. The test in each session is described in details in the Hebrew protocol attached to the current protocol in English.
An informed consent will be signed by each subject prior to a thorough interview. The interview, composed of several question regarding prior health problems, current or past use of medications as well as demographic details (as detailed in the Hebrew protocol) will take place in the test room prior to the beginning of the first session.
Screening tests will include detailed interview, blood pressure, heart rate and ECG strip at the beginning of the first(but not the second) session. The first measurement will be taken following 15 minutes complete rest. The second and the third after 5 and 10 minutes, respectively. Blood examinations are not required in this study.
Healthy subjects: 20 age matched subjects (20-50).
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Contact
- Name: Lior Dayan, M.D
- Phone Number: 972-50-4051014
- Email: liordayan.3105@gmail.com
Study Locations
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-
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Tel Aviv, Israel
- Tel Aviv Sourasky Medical Center, Pain Medicine Unit
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Contact:
- Lior Dayan, M.D
- Phone Number: 972-50-4051014
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Healthy males and females with no known medical conditions, neither taking any chronic medications.
- Ages between 20-50.
- Capable of reading and signing an informed consent.
Exclusion Criteria:
- Any known former medical condition by history affecting any system in the body:
- cardiovascular - any history of angina or chest pain, known valvular disease, known arrhythmia of any kind in the past.
- hypertension defined as SBP > 130 DBP > 90 and heart rate at rest > 90 BPM.
- any occlusive peripheral vascular disease (lower limbs' pulses TP, DP, popliteal and femoral pulses absence on physical examination on the first session).
- smoking.
- History of allergy to any drug.
- Inability to understand the experiment procedure and sign an informed consent.
- Any history of severe trauma trauma to the limbs.
- Any history of neurologic or psychiatric disorder.
- Pregnancy or on anticonceptive pills.
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Basic Science
- Allocation: N/A
- Interventional Model: Single Group Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: yohimbin
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
---|---|
The role of sympatho-vagal balance on different limbs of pain perception in healthy subjects
|
The outcome will be the respose to tonic heat pain on a VAS scale from 0-100 (where 0 no pain and 100 worst pain imagined) before and after administration of drugs that afect the sympathetic nervous system.
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Giris Jacob, MD, Tel-Aviv Sourasky Medical Center
Study record dates
Study Major Dates
Study Start
Primary Completion (Anticipated)
Study Completion (Anticipated)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Physiological Effects of Drugs
- Adrenergic Antagonists
- Adrenergic Agents
- Neurotransmitter Agents
- Molecular Mechanisms of Pharmacological Action
- Autonomic Agents
- Peripheral Nervous System Agents
- Urological Agents
- Adrenergic alpha-Antagonists
- Mydriatics
- Adrenergic alpha-2 Receptor Antagonists
- Yohimbine
Other Study ID Numbers
- TASMC-12-JG-0044-CTIL
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.
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