ISSN 2398-2969      

Carpus: hyperextension

icanis

Introduction

  • Common injury.
  • Cause: fall from a height, or during exercise.
  • Hyperextension may occur secondarily to polyarthropathy.
  • Signs: a) acute injury - pain, non-weight-bearing lameness, soft tissue swelling; b) chronic or degenerative injuries - often relatively painless, abnormal hyperextended joint posture when weight-bearing.
  • Diagnosis: hyperextended stance, imaging to rule out other causes.
  • Treatment: arthrodesis - panarthrodesis if antebrachiocarpal joint affected.
  • Prognosis: guarded without treatment.

Pathogenesis

Etiology

  • Trauma, eg fall from height.
  • Spontaneously at work or during exercise.
  • Spontaneous progressive carpal hyperextension in Collie breeds.
  • Associated with inflammatory polyarthropathy Arthritis: polyarthritis - idiopathic.

Pathophysiology

  • Carpal joint hyperextension caused by disruption of palmar soft tissue supporting elements, resulting in subluxation or luxation of carpal joint (any articulation(s)).
Acute traumatic
  • Disruption of palmar soft tissue supporting elements of carpus cause subluxation or luxation of joint at any articulation(s).
Inflammatory polyarthropathy
  • Insidious onset joint laxity.

Degenerative

  • Spontaneous carpal hyperextension often bilateral in collie breeds without polyarthropathy. Plantar ligaments may be also affected.

Diagnosis

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Treatment

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Outcomes

This article is available in full to registered subscribers

Sign up now to obtain ten tokens to view any ten Vetlexicon articles, images, sounds or videos, or Login

Further Reading

Publications

Refereed papers

  • Recent references from PubMed and VetMedResource.
  • Milgram J, Milshtein T, Meiner Y (2012) The role of the antebrachiocarpal ligaments in the prevention of hyperextension of the antebrachiocarpal joint. Vet Surg 41 (2), 191-199 PubMed.
  • Shires P K, Hulse D A, Kearney M T (1985) Carpal hyperextension in two-month-old pups. JAVMA 186 (1), 49-52 PubMed.

Related Images

Want more related items, why not
contact us

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!

 
 
 
 

To show you are not a Bot please can you enter the number showing adjacent to this field

 Security code