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Measuring Skin Electrical Potential With the Kelvin Probe: Minimizing Noise

This study has been completed.
Information provided by:
Massachusetts General Hospital Identifier:
First received: March 25, 2011
Last updated: July 20, 2011
Last verified: July 2011

The Scanning Kelvin Probe measures surface electrical potential without actually touching the skin. This is a pilot study to evaluate methods of minimizing noise during Scanning Kelvin Probe measurements. This project will focus specifically on noise arising from physical movement and environmental electrical field.

Condition Intervention
Healthy State
Other: Faraday cage, movement stabilization

Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Cross-Sectional
Official Title: Measuring Skin Electrical Potential With the Kelvin Probe: Minimizing Noise

Resource links provided by NLM:

Further study details as provided by Massachusetts General Hospital:

Primary Outcome Measures:
  • Variability in surface electrical potential measurements [ Time Frame: Within 24 hours of testing ] [ Designated as safety issue: No ]
    This study focuses on the ability of the Kelvin Probe to measure skin electrical potential. Because it does so without touching the skin, it is prone to noise - specifically physical movement and surrounding electrical noise. The variability in surface electrical potential is a way to determine how stable the measurements are. It can be determined immediately after testing - and will be used in data analyses (comparing across study volunteers) approximately 24 weeks after testing is complete.

Enrollment: 24
Study Start Date: September 2010
Study Completion Date: February 2011
Primary Completion Date: February 2011 (Final data collection date for primary outcome measure)
Groups/Cohorts Assigned Interventions
Healthy Volunteers Other: Faraday cage, movement stabilization
The Faraday cage is a copper-mesh cage that surrounds the device and test site. It helps eliminate surrounding electrical noise. Movement stabilization will be achieved by placing a velcro strap over the arm to minimize random movements.


Ages Eligible for Study:   18 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

Healthy volunteers


Inclusion Criteria:

  • Age greater than 18 years

Exclusion Criteria:

  • chronic medical condition requiring daily medications (hypertension, diabetes, hypothyroidism, etc)
  • movement disorders/tremors
  • extensive scars on the hand
  • latex-allergies
  • cardiac implantation, metallic joint/bone replacements (defibrillator or pacemaker)
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01399879

Sponsors and Collaborators
Massachusetts General Hospital
Principal Investigator: Andrew C Ahn, MD MPH Massachusetts General Hospital
  More Information

No publications provided

Responsible Party: Andrew C. Ahn, Principal Investigator, Massachusetts General Hospital Identifier: NCT01399879     History of Changes
Other Study ID Numbers: 5R21AT005249
Study First Received: March 25, 2011
Last Updated: July 20, 2011
Health Authority: United States: Institutional Review Board

Keywords provided by Massachusetts General Hospital:
Surface potential
Motion stabilization processed this record on November 20, 2014