Comment Period Extended to 3/23/2015 for Notice of Proposed Rulemaking (NPRM) for FDAAA 801 and NIH Draft Reporting Policy for NIH-Funded Trials

High-Tc Susceptometer to Monitor Transfusional Iron Overload

This study is currently recruiting participants. (see Contacts and Locations)
Verified February 2015 by Columbia University
Information provided by (Responsible Party):
Gary M Brittenham, MD, Columbia University Identifier:
First received: November 12, 2010
Last updated: February 11, 2015
Last verified: February 2015

The proposed research project will continue the application and development of a new method (biomagnetic susceptometry) that measures magnetic fields to determine how much iron is in the liver. The amount of iron in the liver is the best indicator of the amount of iron in the whole body. Measuring the amount of iron in the body is important because either too much (iron overload) or too little iron (iron deficiency) can be harmful. At present, the most reliable way to measure the amount of iron in the liver is to remove a sample of the liver by biopsy, either by surgery or by using a needle which pierces the skin and liver. Iron stored in the liver can be magnetized to a small degree when placed in a magnetic field. In patients with iron overload, the investigators previous studies have shown that magnetic measurements of liver iron in patients with iron overload are quantitatively equivalent to biochemical determinations on tissue obtained by biopsy. In the past the investigators have developed a device to measure the amount of magnetization, which was called a SQUID (Superconducting QUantum Interference Device) susceptometer. This device was validated and in use for over 20 years. The safety, ease, rapidity and comfort of magnetic measurements make frequent, serial studies technically feasible and practically acceptable to patients. The investigators have now developed a new susceptometer, which uses very similar technology to the SQUID, but the investigators believe is more accurate and precise. This study aims to validate this new instrument. The investigators will do prospective, serial studies of the diagnosis and management of patients with iron overload, including thalassemia major (Cooley's anemia), sickle cell disease, aplastic anemia, myelodysplasia, hereditary hemochromatosis, and other disorders. Funding Source - FDA OOPD.

Condition Intervention Phase
Transfusional Iron Overload
Thalassemia Major
Sickle Cell Disease
Myelodysplastic Syndromes
Aplastic Anemia
Device: Hepatic biomagnetic susceptibility measurement
Phase 2

Study Type: Interventional
Study Design: Endpoint Classification: Bio-equivalence Study
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
Official Title: High-Tc Susceptometer to Monitor Transfusional Iron Overload (NSR Device)

Resource links provided by NLM:

Further study details as provided by Columbia University:

Primary Outcome Measures:
  • Hepatic non-heme iron concentration determined by biomagnetic susceptometry [ Time Frame: 2 years ] [ Designated as safety issue: No ]
    The primary study analysis will be a comparison of the results of measurements of the hepatic storage iron concentration by biomagnetic susceptometry with the results of biochemical analysis of the storage iron concentration in liver tissue.

Secondary Outcome Measures:
  • Serum ferritin concentration [ Time Frame: 2 years ] [ Designated as safety issue: No ]
    A secondary study analysis will be a comparison of the results of measurements of the hepatic storage iron concentration by biomagnetic susceptometry with the results of measurements of the serum ferritin concentration.

Estimated Enrollment: 190
Study Start Date: March 2011
Estimated Study Completion Date: May 2015
Estimated Primary Completion Date: March 2015 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
No Intervention: Observation only
This study has a single arm and no intervention.
Device: Hepatic biomagnetic susceptibility measurement
Subjects will first have an ultrasound study to determine the location of the liver and measure the distance from skin surface to the liver. Subjects will then be examined with the high Tc susceptometer to determine the amount of iron in the liver. The entire procedure will usually take one-half hour or less.
Other Names:
  • Hepatic magnetic susceptibility measurement
  • Superconducting biosusceptometry

  Show Detailed Description


Ages Eligible for Study:   5 Years to 80 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes

Inclusion Criteria:

  • being an adult male, nonpregnant female or child who is scheduled for liver transplantation, has transfusional iron overload or is healthy with no known disorder affecting body iron stores,
  • being of sufficient size for the susceptometer (about 15 kg body weight),
  • being able to lie quietly during the measurement procedure (about 5 to 10 minutes),
  • being either able to give fully informed consent or, if a minor, with a parent or legal guardian who is able to give fully informed consent for participation of the minor.

Exclusion Criteria:

  • any form of magnetic contamination or electrical device which cannot be removed for the magnetic measurement procedure, including jewelry, pacemakers, artificial joints, metal staples, indwelling catheters with metallic components, dental braces or other magnetic objects;
  • obesity, ascites or other conditions in which the liver to surface distance exceeds 25 mm;
  • pregnancy, treatment for mental illness, imprisonment, institutionalization, or any condition that impairs ability to provide fully informed consent.
  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: NCT01241357

Contact: Susana Hernandez, R.N. 212 305-5808
Contact: Sujit Sheth, M.D. 212 746-3439

United States, New York
Columbia University Medical Center Recruiting
New York, New York, United States, 10032
Contact: Susana Hernandez, R.N.    212-305-5808   
Contact: Sujit Sheth, M.D.    212 746-3439   
Principal Investigator: Gary M. Brittenham, M.D.         
Sub-Investigator: Sujit Sheth, M.D.         
Sponsors and Collaborators
Columbia University
Principal Investigator: Gary M. Brittenham, M.D. Columbia University
  More Information

Farrell DE, Allen CJ, Whilden MW, Kidane TK, Baig TN, Tripp JH, Brown RW, Sheth A, Brittenham GM. A new instrument designed to measure the magnetic susceptibility of human liver tissue in vivo. IEEE Trans Magnetics 2007;43:3543-3554.

Responsible Party: Gary M Brittenham, MD, James A. Wolff Professor of Pediatrics, Columbia University Identifier: NCT01241357     History of Changes
Other Study ID Numbers: AAAE5051, R01FD003702
Study First Received: November 12, 2010
Last Updated: February 11, 2015
Health Authority: United States: Institutional Review Board

Keywords provided by Columbia University:
Iron overload
Hepatic iron concentration
High-temperature superconductivity
Magnetic susceptibility

Additional relevant MeSH terms:
Iron Overload
Myelodysplastic Syndromes
Bone Marrow Diseases
Hematologic Diseases
Iron Metabolism Disorders
Metabolic Diseases processed this record on March 03, 2015