Functionality of implanted microchips following magnetic resonance imaging

Katherine A. HaifleyFrom the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996.

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Silke HechtFrom the Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996.

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DOI:
https://doi.org/10.2460/javma.240.5.577
Volume/Issue:
Volume 240: Issue 5
Online Publication Date:
01 Mar 2012
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Abstract

Objective—To determine the functionality of implanted microchips following magnetic resonance imaging (MRI).

Design—Prospective clinical trial.

Animals—53 client-owned patients implanted with a microchip undergoing MRI of various areas of the body for a variety of medical conditions.

Procedures—General anesthesia was induced, and each patient's microchip was scanned with a universal microchip scanner; the chip number was recorded. Patients were transported to the MRI suite, and MRI was completed. Patients were moved out of the magnetic environment, and microchips were scanned again. Patient information and chip number were recorded. Chip numbers before and after MRI were compared.

Results—For all 53 microchips scanned from 53 patients, the same number was read accurately following MRI of a variety of sites.

Conclusions and Clinical Relevance—These data indicated that MRI did not interfere with the functionality of these microchips. This information is valuable for practitioners recommending MRI for their patients and for clients who have invested in implanting a microchip in their pets.

Abstract

Objective—To determine the functionality of implanted microchips following magnetic resonance imaging (MRI).

Design—Prospective clinical trial.

Animals—53 client-owned patients implanted with a microchip undergoing MRI of various areas of the body for a variety of medical conditions.

Procedures—General anesthesia was induced, and each patient's microchip was scanned with a universal microchip scanner; the chip number was recorded. Patients were transported to the MRI suite, and MRI was completed. Patients were moved out of the magnetic environment, and microchips were scanned again. Patient information and chip number were recorded. Chip numbers before and after MRI were compared.

Results—For all 53 microchips scanned from 53 patients, the same number was read accurately following MRI of a variety of sites.

Conclusions and Clinical Relevance—These data indicated that MRI did not interfere with the functionality of these microchips. This information is valuable for practitioners recommending MRI for their patients and for clients who have invested in implanting a microchip in their pets.

Contributor Notes

Universal WorldScan Reader microchip scanner was provided by Digital Angel Incorporated, Saint Paul, Minn.

Address correspondence to Dr. Haifley (khaifley@utk.edu).
Cover Journal of the American Veterinary Medical Association
Journal of the American Veterinary Medical Association
ISSN:
0003-1488
Publication Date:
01 Mar 2012
  • 1.

    Young-Williams Animal Center. Statistics. Available at: www.young-williams.org/about-ywac/statistics. Accessed Aug 12, 2010.

  • 2.

    Barbosa T. Microchipping your pet is no panacea. Available at: latimesblogs.latimes.com/unleashed/2008/04/needs-edit-micr.html. Accessed Aug 12, 2010.

    • Search Google Scholar
    • Export Citation
  • 3.

    Lord LKWittum TFerketich AK, et al. Search and identification methods that owners use to find a lost dog. J Am Vet Med Assoc 2007; 230: 211–216.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 4.

    Wingfield WEPalmer SB. Veterinary disaster response. Hoboken, NJ: Wiley-Blackwell, 2009.

  • 5.

    AVMA. Backgrounder: microchipping of animals. October 2, 2009. Available at: www.avma.org/issues/microchipping/microchipping_bgnd.asp. Accessed Aug 12, 2010.

    • Search Google Scholar
    • Export Citation
  • 6.

    AVMA. Microchipping of animals FAQ. Available at: www.avma.org/issues/microchipping/microchipping_faq.asp. Accessed Jul 7, 2009.

  • 7.

    HomeAgain. Pet microchip for cats and dogs. Available at: public.homeagain.com/. Accessed Aug 12, 2010.

  • 8.

    Microchip ID Systems. Common questions about Microchip ID Systems. Available at: www.microchipidsystems.com/answer.htm. Accessed Aug 12, 2010.

    • Search Google Scholar
    • Export Citation
  • 9.

    Horowitz AL. MRI physics for physicians. New York: Springer-Verlag, 1989.

  • 10.

    Lord LKPennell MLIngwersen W, et al. Sensitivity of commercial scanners to microchips of various frequencies implanted in dogs and cats. J Am Vet Med Assoc 2008; 233: 1729–1735.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 11.

    Lord LKIngwersen WGray J, et al. Characterization of animals with microchips entering animal shelters. J Am Vet Med Assoc 2009; 235: 160–167.

    • Crossref
    • Search Google Scholar
    • Export Citation
  • 12.

    Saito MOno SKayanuma H, et al. Evaluation of the susceptibility artifacts and tissue injury caused by implanted microchips in dogs on 1.5 T magnetic resonance imaging. J Vet Med Sci 2010; 72: 575–581.

    • Crossref
    • Search Google Scholar
    • Export Citation

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