Anatomy Study in Control Nerve From Normal Human

October 20, 2011 updated by: National Taiwan University Hospital
  1. To explore the pathology of nerve, vasculature in the normal control nerve
  2. Compare the pathology of control nerve and nerve from amputated limb of diabetes

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Diabetic foot occurs in 15% of diabetic population (3) and 15% of the diabetic foot patients end up with lower limb amputation. Peripheral neuropathy (sensory, motor and autonomic), peripheral vascular disease, trauma, infection and poor wound healing all contribute to diabetic foot problem.

Peripheral neuropathy could be evaluated in a variety of ways, including vibratory thresholds, thermal thresholds, pressure perception thresholds, muscle strength. All these predict foot ulceration to some degree(1). Motor nerve conduction velocity is an independent predictor for the development of new foot ulcer in diabetic population.

For more detailed structural study of neuropathy in diabetic patient, we could use skin biopsy method. Skin biopsy with PGP9.5 immunohistochemistry has been demonstrated by ultrastructural studies to label the terminal portions of both small myelinated and unmyelinated nerve in the epidermis (5). Intra-epidermal nerve fiber (IENF) density is reduced in patient with impaired glucose tolerance and clinically overt diabetes (5). Previous IENF density study was performed in diabetic patients with sensory symptom but no foot ulcer. Now we tried to evaluate IENF density in severe diabetic foot patient who received below knee amputation. Skin biopsy will be performed at amputated leg. The skin biopsy area will be located at lateral side of distal leg, 10 cm above the lateral malleolus as previous protocol of our group (6). Underlying sural nerve and posterior tibial nerve will be also harvested for further ultra-structural study.

We had previous IRB for "Pathology of skin, nerve and vasculature in the amputated limb of diabetes". However, pathology of normal control nerve is important to compare the pathology of nerve from amputated limb of diabetes. For parotid cancer patients receiving radical parotidectomy, facial nerve is frequently sacrificed. Sural nerve is frequently harvested for reconstruction. Sural nerve is also frequently used in ther nerve construction surgery. During these operations, we could harvested 2 cm more sural nerve for normal nerve pathology study. For cadaveric donor patient, we also could harvest normal nerve for control study.

Study Type

Observational

Enrollment (Anticipated)

20

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

  • Taiwan
      • Taipei, Taiwan, 100
        • Recruiting
        • National Taiwan University Hospital
        • Contact:

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

10 years to 90 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Non-Probability Sample

Study Population

cadaveric donor patients receiving nerve graft operation

Description

Inclusion Criteria:

  • Cadaveric donor
  • Patients receiving nerve graft operation

Exclusion Criteria:

  • Patient with neurologic disease

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

  • Observational Models: Case-Only
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
harvest nerve
harvest nerve from cadaveric donor and patients receiving nerve graft operation
Procedure: harvest nerve
harvest nerve from cadaveric donor and patients receiving nerve graft operation

Collaborators and Investigators

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

Sponsor

National Taiwan University Hospital

Investigators

  • Study Director: Jung-Hsien Hsieh, MD, National Taiwan University Hospital

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

August 1, 2011

Primary Completion (Anticipated)

December 1, 2013

Study Completion (Anticipated)

December 1, 2013

Study Registration Dates

First Submitted

January 18, 2010

First Submitted That Met QC Criteria

January 19, 2010

First Posted (Estimate)

January 20, 2010

Study Record Updates

Last Update Posted (Estimate)

October 21, 2011

Last Update Submitted That Met QC Criteria

October 20, 2011

Last Verified

October 1, 2011

More Information

Terms related to this study

Keywords

Other Study ID Numbers

  • 200912006R

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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