Autonomic Nervous System Function Following Bariatric Surgery

November 6, 2012 updated by: Christiana Care Health Services

Autonomic Nervous System Function and Novel Determinants of Glucose Homeostasis Following Bariatric Surgery

In the proposed study, the investigators will explore three specific aims. First, the investigators will examine cross-sectionally the association of obesity on sympathetic, parasympathetic, and sympathetic/ parasympathetic nerve fiber balance. In addition, the investigators will determine the relationship of the ANS and osteocalcin. Osteocalcin will be measured before and after a mixed meal tolerance test.

In the second specific aim, the investigators will prospectively follow-up these individuals (n=30) following bariatric surgery. The effect of weight loss on measures of the ANS and osteocalcin will be examined 6 months following surgery with participants serving as their own control, pre- and post-surgical intervention.

Thirdly, the investigators will address whether the effect of weight loss on the ANS and osteocalcin differ between those who had a history of diabetes at baseline versus those with no history of diabetes.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Actual)

37

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Delaware
      • Newark, Delaware, United States, 19713
        • Christiana Care Health Services

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 60 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

Individuals having bariatric surgery

Description

Inclusion Criteria:

  1. Individuals aged 18 - 60 years old.
  2. Individuals with a BMI > 35 kg/m2.
  3. Patients that have enrolled in a program to undergo weight loss by Roux-en-Y gastric bypass and having passed the pre-operative clearance program.
  4. Individuals with diabetes who are currently being treated with diet, exercise, and/or oral medications will be included.

Exclusion Criteria:

  1. Patients that have had previous gastric surgery, including but not limited to pancreobiliary diversion, vertical banded gastroplasty, and jejunoileostomy.
  2. Individuals with known coronary artery disease (e.g., post-MI), atrial fibrillation,frequent atrial arrhythmias, frequent ventricular arrhythmias, a pacemaker, or myocardial ischemia.
  3. Individuals taking the following medications that may affect the autonomic nervous system: anti- tuberculosis drugs, nitrofurantoin, metronidazole, chloramphenicol,perhexiline maleate, amiodarone, clofibrate, tricyclic antidepressants, phenytoin,methotrexate, barbiturates, neuroleptic drugs, antiparkinsonism drugs, fluoxetine, and nitrated drugs.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
No treatment
Observing individuals pre and post bariatric surgery
Other: Observational study - there is no intervention
Observational study - there is no intervention

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
To determine the association of obesity on sympathetic, parasympathetic, and sympathetic/parasympathetic nerve fiber balance and to determine the relationship of the ANS and osteocalcin.
Time Frame: 2 years
2 years

Secondary Outcome Measures

Outcome Measure
Time Frame
To determine the effect of weight loss on measures of the ANS and determinants of insulin sensitivity (e.g., osteocalcin) 6 months following surgery with participants serving as their own control, pre- and post-surgical intervention.
Time Frame: 2 years
2 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Christiana Care Health Services

Collaborators

American Society for Metabolic and Bariatric Surgery

Investigators

  • Principal Investigator: M James Lenhard, MD, Christiana Care Health Services

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

July 1, 2009

Primary Completion (Actual)

June 1, 2011

Study Completion (Actual)

April 1, 2012

Study Registration Dates

First Submitted

July 28, 2009

First Submitted That Met QC Criteria

July 28, 2009

First Posted (Estimate)

July 29, 2009

Study Record Updates

Last Update Posted (Estimate)

November 7, 2012

Last Update Submitted That Met QC Criteria

November 6, 2012

Last Verified

November 1, 2012

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 29092

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.

Subscribe