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Pyloric localisation in 57 dogs of breeds susceptible to gastric dilatation-volvulus using computed tomography
  1. A. W. Tomlinson, BVSc CertAVP(GSAS) MRCVS1,
  2. S. M. Lillis, BVMS BSc MVSc DipACVR MRCVS2,
  3. A. J. German, BVSc(Hons) PhD CertSAM DipECVIM-CA MRCVS1 and
  4. R. D. Burrow, BVetMed CertSAS CertVR DipECVS MRCVS1
  1. 1School of Veterinary Science, University of Liverpool, Neston, UK
  2. 2College of Veterinary Medicine, School of Veterinary and Life Sciences, Murdoch University, Perth, Australia
  3. 3A. J. German also at Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK
  1. E-mail for correspondence: andytom{at}


Objective: Describe the location of the pylorus using CT in dog breeds susceptible to gastric dilatation-volvulus in the UK.

Methods: Descriptive anatomical study. Abdominal CT scans of 57 client-owned dogs were reviewed to assess pyloric position relative to the 9th, 10th, 11th and 13th ribs and 2 and 3 cm caudal to the 13th rib at the 8, 9 and 10 o'clock positions. The angle of the pylorus from the centre of the abdominal cavity relative to the sagittal plane was also determined.

Results: In 88 per cent of cases, the pylorus was located in the right cranioventral abdomen with 63 per cent positioned at the 9–10 o'clock position. The overall distance between the pylorus and right abdominal wall (RAW) at the 13th rib 10 o'clock position was equivalent to 29 per cent of ventral abdominal length, significantly greater than the median overall distance of ∼14 per cent of ventral abdominal length between the pylorus and RAW at the 9th or 10th rib 10 o'clock position (P<0.0001).

Clinical significance: Common gastropexy locations may result in considerable displacement of the pylorus relative to its natural anatomic location. Further case-control studies are required to assess the clinical significance of this finding.

  • GDV
  • Recurrence
  • Computed tomography (CT)
  • Pylorus
  • Gastropexy

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  • Provenance Not commissioned; externally peer reviewed.

  • Correction notice This article has been corrected since it was published Online First. The title has been changed from ‘Pyloric localisation in 57 dogs of breeds susceptible to gastric dilatation-volvulus in the UK using computed tomograph y’ to ‘Pyloric localisation in 57 dogs of breeds susceptible to gastric dilatation-volvulus using computed tomography’.

  • Competing interests  AJG's academic post at the University of Liverpool is financially supported by Royal Canin.

  • Ethics approval This was a retrospective observational study approved by the University of Liverpool Veterinary Research Ethics Committee (VREC130).

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