Scintigraphic evaluation of digital circulation during the developmental and acute phases of equine laminitis

Scintigraphic evaluation of digital circulation during the developmental and acute phases of... Summary Scintigraphy was used to evaluate digital circulation at 24 h intervals in 11 control horses and in nine horses affected with acute laminitis created by administration of a high‐starch ration. Following intra‐arterial injection of technetium‐99m macroaggregated albumin into the brachiocephalic trunk, static images were acquired of the right front foot. Dynamic radionuclide angiograms and static blood pool images were also obtained after jugular vein injection of technetium‐99m diethylenetriamine pentaacetic acid. These procedures were performed on standing horses, using either minimal or no tranquillisation. Images were analysed quantitatively for parameters indicative of circulation to the whole foot and to specific regions within the foot. There was no evidence of reduced total blood flow to the lamellae during either the developmental or acute phases of laminitis. Total flow tended to increase throughout the peripheral/external regions of the foot, but statistically significant elevations were consistently present only within the lamellae. The increased total blood flow to the lamellae may have been due to elevated capillary flow and/or elevated arteriovenous shunt flow. This study did not support lamellar ischaemia as the primary cause of acute equine laminitis. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Equine Veterinary Journal Wiley

Scintigraphic evaluation of digital circulation during the developmental and acute phases of equine laminitis

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Publisher
Wiley
Copyright
© 1990 EVJ Ltd
ISSN
0425-1644
eISSN
2042-3306
DOI
10.1111/j.2042-3306.1990.tb04308.x
Publisher site
See Article on Publisher Site

Abstract

Summary Scintigraphy was used to evaluate digital circulation at 24 h intervals in 11 control horses and in nine horses affected with acute laminitis created by administration of a high‐starch ration. Following intra‐arterial injection of technetium‐99m macroaggregated albumin into the brachiocephalic trunk, static images were acquired of the right front foot. Dynamic radionuclide angiograms and static blood pool images were also obtained after jugular vein injection of technetium‐99m diethylenetriamine pentaacetic acid. These procedures were performed on standing horses, using either minimal or no tranquillisation. Images were analysed quantitatively for parameters indicative of circulation to the whole foot and to specific regions within the foot. There was no evidence of reduced total blood flow to the lamellae during either the developmental or acute phases of laminitis. Total flow tended to increase throughout the peripheral/external regions of the foot, but statistically significant elevations were consistently present only within the lamellae. The increased total blood flow to the lamellae may have been due to elevated capillary flow and/or elevated arteriovenous shunt flow. This study did not support lamellar ischaemia as the primary cause of acute equine laminitis.

Journal

Equine Veterinary JournalWiley

Published: Nov 1, 1990

References

  • Arterio‐venous anastomoses
    Clark, Clark
  • Electron microscopic study of the veins of the dermal lamellae of the equine hoof wall
    Mishra, Mishra; Leach, Leach

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