Effect of a static magnetic field on blood flow to the metacarpus in horses.
Abstract: To determine the effect of a static magnetic field on relative blood flow to the metacarpus of horses. Methods: Randomized controlled clinical trial. Methods: 6 healthy adult horses. Methods: Red blood cells were radiolabeled in vivo by administration of technetium Tc 99m (pyro- and trimeta-) phosphates, and scintigraphic images were obtained 30 minutes later. A magnetic wrap that emitted a static magnetic field was applied to 1 metacarpus and a control wrap was applied to the contralateral metacarpus. Forty-eight hours later, the wraps were removed, and scintigraphy was repeated. Relative perfusion ratios were calculated by dividing mean count per pixel for the portion of the metacarpus under the wrap by mean count per pixel for a portion of the distal aspect of the antebrachium that was not in the magnetic field. Results: The difference between the relative perfusion ratio prior to application of the wrap and the ratio after application of the wrap for limbs that received the magnetic wrap was not significantly different from the difference in ratio for limbs that received the control wrap. Conclusions: Results suggest that in horses, the static magnetic field associated with application of commercially available magnetic wraps for 48 hours does not increase blood flow to the portion of the metacarpus underneath the wrap.
Publication Date: 2000-09-21 PubMed ID: 10997160DOI: 10.2460/javma.2000.217.874Google Scholar: Lookup
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- Clinical Trial
- Journal Article
- Randomized Controlled Trial
Summary
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The research examines the impact of a static magnetic field on the blood flow in a horse’s metacarpus, concluding that commercially available magnetic wraps used over a period of two days do not significantly alter blood flow to the area.
Methodology
- The researchers conducted a randomized controlled clinical trial using six healthy adult horses.
- Red blood cells were radiolabeled in vivo by administering technetium Tc 99m phosphates. This labeling allowed the blood flow to be tracked and visualized using scintigraphy, a diagnostic imaging method.
- The horses’ metacarpuses were then wrapped. One with a wrap that emitted a static magnetic field, and the contralateral (opposite side) metacarpus was given a control(non-magnetic) wrap.
- Following a 48 hours period, the researchers removed the wraps and repeated scintigraphy procedure – this would allow comparison of relative blood flow before and after the application of the wraps.
- Relative perfusion ratios were calculated for each horse to see the effect on blood flow. This ratio was determined by dividing the mean count-per-pixel for the portion of the metacarpus under the wrap, by the mean count-per-pixel for a section of the antebrachium that wasn’t in the magnetic field.
Results
- The study found that the difference in the relative perfusion ratio before and after the application of the magnetic wrap was not statistically different from the ratio for the limbs covered by the control wrap.
- In simpler terms, it means that there wasn’t any significant change in blood flow on the part of the wrapper area within 2 days of application, in comparison to normal blood flow.
Conclusions
- The results suggested that the use of a static magnetic field, in the form of an applied wrap, does not result in an increase in blood flow to the underneath metacarpus on horses.
- This means that commercial magnetic wraps that claim to enhance blood flow may not be effective, at least in the case of horses, and potentially broader in the application
Cite This Article
APA
Steyn PF, Ramey DW, Kirschvink J, Uhrig J.
(2000).
Effect of a static magnetic field on blood flow to the metacarpus in horses.
J Am Vet Med Assoc, 217(6), 874-877.
https://doi.org/10.2460/javma.2000.217.874 Publication
Researcher Affiliations
- Department of Radiological Health Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Ft Collins 80523, USA.
MeSH Terms
- Animals
- Forelimb / blood supply
- Forelimb / diagnostic imaging
- Horses / physiology
- Magnetics
- Metacarpus / blood supply
- Metacarpus / diagnostic imaging
- Phosphates / administration & dosage
- Radionuclide Imaging
- Statistics, Nonparametric
- Technetium Compounds / administration & dosage
Citations
This article has been cited 2 times.- Hyytiäinen HK, Boström A, Asplund K, Bergh A. A Systematic Review of Complementary and Alternative Veterinary Medicine in Sport and Companion Animals: Electrotherapy.. Animals (Basel) 2022 Dec 23;13(1).
- Mayrovitz HN, Maqsood R, Tawakalzada AS. Do Magnetic Fields Have a Place in Treating Vascular Complications in Diabetes?. Cureus 2022 May;14(5):e24883.
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