ISSN 2398-2950      

Radius / ulna: fracture of proximal ulnar associated with luxation of the radial head

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Synonym(s): Monteggia fracture


Introduction

  • Relatively common in cats.
  • Site: any level, although proximal ulna fracture most common.
  • Usually results in rupture of annular ligament.
  • Treatment: open reduction as soon as possible.
  • Lesions can be classified into 4 types on the basis of direction of the dislocation of the radial head and angulation of the ulnar fracture. Cranial dislocation of the radial head, with cranial angulation of the ulnar fracture (type 1 lesion) is the most common.

Pathogenesis

Etiology

  • Direct trauma.

Pathophysiology

  • Ulna: can fracture at any level, but most common proximally.
  • The more distal the injury the more severe the damage to the interosseous ligament.
  • Luxation of radial head usually results from, or is associated with rupture of annular ligament Ulna: proximal fracture with radial head luxation - radiograph CrCd    Ulna: proximal fracture with radial head luxation - radiograph lateral .

Diagnosis

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Treatment

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Outcomes

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Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Irubetagoyena A, Lopez T, Autefage A (2011) Type IV Monteggia fracture in a cat. Vet Comp Orhtop Traumatol 24 (6), 483-486 PubMed.
  • Vallone L, Schulz K (2011) Repair of Monteggia fractures using an Arthrex Tightrope system and ulnar plating. Vet Surg 40 (6), 734-737 PubMed.
  • Bush M, Owen M (2009) Type-IV variant Monteggia fracture with concurrent proximal radial physeal fracture in a Domestic Shorthaired cat. Vet Comp Orthop Traumatol 22 (3), 225-228 PubMed.
  • Schwarz P, Schrader S C (1984) Ulnar fracture and dislocation of the proximal radial epiphysis (Monteggia lesion) in the dog and cat: a review of 28 casesJAVMA 185 (2), 190-194 PubMed.

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