Ultrasound-based Intima-Media Thickness Measurements

This study has been completed.
Sponsor:
Information provided by:
Mayo Clinic
ClinicalTrials.gov Identifier:
NCT00588484
First received: December 25, 2007
Last updated: November 7, 2012
Last verified: November 2012
  Purpose

Develop a standard technique and demonstrate adequate precision for measurement of intima-media thickness (IMT) for routine clinical use.


Condition
Carotid Artery Intima Media Thickness

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Determination of the Precision and Clinical Utility of Ultrasound-based Intima-Media Thickness Measurements

Resource links provided by NLM:


Further study details as provided by Mayo Clinic:

Primary Outcome Measures:
  • The primary statistical endpoint for this study is to determine the standard deviation and 95% confidence interval of IMT measurements obtained using our standard method. [ Time Frame: Four years ] [ Designated as safety issue: No ]

Secondary Outcome Measures:
  • Standard deviation and 95% confidence interval of our IMT measurement method considering data subsets with variable US image quality levels, and different levels of image plane correlation. [ Time Frame: Two years ] [ Designated as safety issue: No ]

Enrollment: 128
Study Start Date: December 2002
Study Completion Date: September 2009
Primary Completion Date: September 2009 (Final data collection date for primary outcome measure)
Groups/Cohorts
1
Men, age 35 to 65, being seen at the Mayo Clinic Department of Cardiovascular Health clinic, or has an appointment for a carotid duplex ultrasound exam.
2
Women, age 35 to 65, being seen at the Mayo Clinic Department of Cardiovascular Health clinic, or has an appointment for a carotid duplex ultrasound exam.

Detailed Description:

IMT is measured using software to analyze ECG-gated US image sequences acquired using a standard protocol. Two sonographers acquire images and measure IMT for 100 vessels. IMT technique standard deviation (SD) is determined by assuming normally distributed measurements, and dividing the SD of the 100 (paired) IMT differences by sqrt(2). This SD will be taken as measures of precision of the IMT technique.

  Eligibility

Ages Eligible for Study:   35 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Sampling Method:   Non-Probability Sample
Study Population

75 Men and 75 women, ages 35-65, being seen either at the Mayo Clinic Cardiovascular Clinic, or having an appointment for a carotid duplex ultrasound.

Criteria

Inclusion Criteria:

  • Must have an appointment at either the Cardiovascular Health Clinic or scheduled for a carotid ultrasound.

Exclusion Criteria:

  • Carotid endarterectomy,carotid stenting, carotid repair, less than 45 degree range of motion in the neck, and/or cannot lie flat on back.
  • Participants Enrolled who are found after imaging not to exhibit a ~1cm long common carotid far wall region free of focal plaque in which to measure IMT will not have their data analyzed further.
  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 ClinicalTrials.gov identifier: NCT00588484

Locations
United States, Minnesota
Mayo Clinic
Rochester, Minnesota, United States, 55905
Sponsors and Collaborators
Mayo Clinic
Investigators
Principal Investigator: Nicholas J. Hangiandreou, Ph.D. Mayo Clinic
  More Information

Additional Information:
No publications provided

Responsible Party: Nicholas J. Hangiandreou, Ph.D., Mayo Clinic
ClinicalTrials.gov Identifier: NCT00588484     History of Changes
Other Study ID Numbers: 2466-02
Study First Received: December 25, 2007
Last Updated: November 7, 2012
Health Authority: United States: Food and Drug Administration

Keywords provided by Mayo Clinic:
Carotid artery
Common carotid artery
Measurement
Ultrasound

ClinicalTrials.gov processed this record on September 30, 2014