Bovis ISSN 2398-2993

Right displaced abomasum: surgical technique

Synonym(s): RDA

Contributor(s): Gwen Rees , John Remnant

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Introduction

  • Right-sided displacement of the abomasum (RDA) usually precedes abomasal volvulus (AV) although both are often simply referred to as RDA.
  • Right sided displacement without volvulus is less common than Left sided displacement Left sided displacement, or abomasal volvulus with LDA:RDA ratio of 30:1 and LDA:AV ratio of 10:1.
  • Once volvulus occurs, RDA is a life-threatening emergency in contrast to LDA.
  • Surgical correction is the only treatment for RDA with volvulus.

Uses

  • Correction of RDA with or without volvulus.
  • Treatment of cases of RDA without volvulus which have failed to respond to medical treatment.
Advantages
  • Only technique available to correct RDA with volvulus.
  • Also allows correction of other conditions with similar presentations, eg caecal torsion.
Disadvantages
  • Patient often extremely unwell leading to poorer outcomes.
  • Surgery can be difficult.

Requirements

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Preparation

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Procedure

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Aftercare

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Outcomes

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Prognosis

  • Variable and dependent on clinical condition of the animal prior to surgery and location of volvulus.
  • Simple RDA without volvulus has a good prognosis.
  • RDA with volvulus has a more guarded prognosis.
  • Overall survival rate around 70%.
  • Survival rate with AV – 90%.
  • Survival rate with OAV – 55%.
  • Survival rate with ROAV – 0%.

Further Reading

Publications

Refereed Papers

  • Recent references from PubMed and VetMed Resource.
  • Kirby M (2008) Differential diagnosis and management of right-sided abdominal ‘ping’ in dairy cattle. In Practice 30 pp 98-104.
  • Constable P D, St Jean G, Hull B L, Rings D M & Hoffsis G F (1991) Preoperative prognostic indicators in cattle with abomasal volvulus. Journal of the American Veterinary Medical Associateion 198 (12) pp 2077-2085.
  • Constable P D, St Jean G, Hull B L, Rings D M & Hoffsis G F (1991) Prognostic value of surgical and postoperative findings in cattle with abomasal volvulus. Journal of the American Veterinary Medical Association 199 (7) pp 892-898.
  • Simpson D F, Erb H N & Smith D F (1985) Base excess as a prognostic and diagnostic indicator in cows with abomasal volvulus or right displacement of the abomasum. American Journal of Veterinary Research 46 (4) pp 796-797.
  • Smith D F (1978) Right-sided torsion of the abomasum in dairy cows: classification of severity and evaluation of outcome. Journal of the American Veterinary Medical Association 173 pp 108-111.
  • St Jean G (1990) Decision making in bovine abdominal surgery. Veterinary Clinics of North America: Food Animal Practice 6 pp 399-448.


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