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Effect of hemi-circumferential periosteal transection and elevation in foals with experimentally induced angular limb deformities

Emma K. Read DVM1,2, Matt R. Read DVM, MVSc3,4, Hugh G. Townsend DVM, MSc5, Christopher R. Clark Vet MB, MVSc6, John W. Pharr DVM, DACVR7, and David G. Wilson DVM, DACVS8
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  • 1 Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B4.
  • | 2 Present address is Department of Large Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602.
  • | 3 Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B4.
  • | 4 Present address is Department of Small Animal Medicine, College of Veterinary Medicine, University of Georgia, Athens, GA 30602.
  • | 5 Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B4.
  • | 6 Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B4.
  • | 7 Department of Small Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B4.
  • | 8 Department of Large Animal Clinical Sciences, Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK, Canada S7N 5B4.

Abstract

Objective—To evaluate the effect of hemi-circumferential periosteal transection and elevation (HCPTE) in foals with experimentally induced angular limb deformities.

Design—Prospective study.

Animals—10 healthy foals.

Procedure—When foals were 30 days old, transphyseal bridge implants were placed on the lateral aspects of both distal radial physes. At 90 days of age (or when 15 degrees of angulation had developed), implants were removed, and HCPTE was performed on 1 limb. Foals were confined in small pens after surgery; the front feet of the foals were rasped weekly to maintain medial-to-lateral hoof wall balance. Dorsopalmar radiographic projections of the carpi were obtained before HCPTE and 2, 4, 6, 8, and 48 weeks later.

Results—At the time of transphyseal bridge removal and HCPTE, both treated and control limbs were observed to have a significantly greater carpal valgus, compared with the initial degree of angulation at 30 days of age. Following HCPTE or sham surgery, all limbs straightened over the subsequent 2 months of the study. Median angulation was not significantly different between treated and control limbs at any time during the study.

Conclusions and Clinical Relevance—Results suggest that in foals with experimentally induced limb deformities, HCPTE was no more effective than stall confinement and hoof trimming alone for correction of the deformity. (J Am Vet Med Assoc 2002;221:536–540)

Abstract

Objective—To evaluate the effect of hemi-circumferential periosteal transection and elevation (HCPTE) in foals with experimentally induced angular limb deformities.

Design—Prospective study.

Animals—10 healthy foals.

Procedure—When foals were 30 days old, transphyseal bridge implants were placed on the lateral aspects of both distal radial physes. At 90 days of age (or when 15 degrees of angulation had developed), implants were removed, and HCPTE was performed on 1 limb. Foals were confined in small pens after surgery; the front feet of the foals were rasped weekly to maintain medial-to-lateral hoof wall balance. Dorsopalmar radiographic projections of the carpi were obtained before HCPTE and 2, 4, 6, 8, and 48 weeks later.

Results—At the time of transphyseal bridge removal and HCPTE, both treated and control limbs were observed to have a significantly greater carpal valgus, compared with the initial degree of angulation at 30 days of age. Following HCPTE or sham surgery, all limbs straightened over the subsequent 2 months of the study. Median angulation was not significantly different between treated and control limbs at any time during the study.

Conclusions and Clinical Relevance—Results suggest that in foals with experimentally induced limb deformities, HCPTE was no more effective than stall confinement and hoof trimming alone for correction of the deformity. (J Am Vet Med Assoc 2002;221:536–540)