The Intraosseous Blood Supply of the Canine Radius: Implications for Healing of Distal Fractures in Small Dogs

The intraosseous vascular anatomy of the radius was studied in 12 pairs of canine cadaver limbs. Six pairs of specimens were obtained from small‐breed dogs (less than 6 kg) and six pairs were obtained from large‐breed dogs (18 to 30 kg). All specimens were studied after arterial injection with India...

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Bibliographic Details
Published in:Veterinary surgery 1997-01, Vol.26 (1), p.57-61
Main Authors: WELCH, JANET A., BOUDRIEAU, RANDY J., DEJARDIN, LOIC M., SPODNICK, GARY J.
Format: Article
Language:English
Subjects:
Animals
Brachial Artery - physiology
Dogs - injuries
Dogs - physiology
Fracture Healing - physiology
Prognosis
Radius - blood supply
Radius - injuries
Radius - physiology
Radius Fractures - physiopathology
Radius Fractures - veterinary
Regional Blood Flow
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Summary:The intraosseous vascular anatomy of the radius was studied in 12 pairs of canine cadaver limbs. Six pairs of specimens were obtained from small‐breed dogs (less than 6 kg) and six pairs were obtained from large‐breed dogs (18 to 30 kg). All specimens were studied after arterial injection with India ink. Samples were fixed, frozen, then sectioned and processed using a modified Spalteholz technique. In all specimens, the intraosseous blood supply arose from the nutrient artery with its associated branches and the metaphyseal arteries. In small‐breed dogs, there was decreased vascular density at the distal diaphyseal‐metaphyseal junction compared with large‐breed dogs. The reduced vascularity corresponded to the region associated with a poor prognosis for fracture healing in small‐breed dogs. This regional association suggests that a decreased vascular supply in the distal radius may contribute to a higher frequency of delayed union and nonunion in smaller dogs.
ISSN:0161-3499
1532-950X
DOI:10.1111/j.1532-950X.1997.tb01463.x