title: Measurement of urinary 11-dehydro-thromboxane B2 excretion in dogs with gastric dilatation-volvulus.
abstract: OBJECTIVE
  To measure 11-dehydro-thromboxane B2 (11-dTXB2) in urine of healthy control dogs, dogs undergoing ovariohysterectomy, and dogs with gastric dilatation-volvulus (GDV) and assess the relationship between urinary 11-dTXB2 concentrations in dogs with GDV and postoperative outcomes.
  
  
  METHODS
  Urine samples from 15 nonsurgical control dogs, 12 surgical control dogs, and 32 dogs with GVD.
  
  
  METHODS
  Urine samples were obtained from healthy pet dogs (ie, nonsurgical control dogs), dogs undergoing ovariohysterectomy at anesthetic induction and 1 hour following surgery (ie, surgical control dogs), and dogs with GDV at hospital admission and 1 hour following surgical derotation of the stomach (ie, GDV dogs). Urinary 11-dTXB2 concentrations were determined with an ELISA and normalized to urinary creatinine (Cr) concentrations by calculation of the 11-dTXB2 -to-Cr ratio. Differences in median 11-dTXB2 -to-Cr ratios among dogs and before and after surgery were analyzed.
  
  
  RESULTS
  Urinary 11-dTXB2-to-Cr ratios did not differ between nonsurgical control dogs and surgical control dogs before or after surgery. Urinary 11-dTXB2-to-Cr ratios were significantly higher in GDV dogs at the time of hospital admission and 1 hour after surgery, compared with those of nonsurgical control dogs. Postoperative urine samples from GDV dogs had significantly higher 11-dTXB2-to-Cr ratios than postoperative urine samples from surgical control dogs. Median urinary 11-dTXB2-to-Cr ratios increased significantly in GDV dogs that developed postoperative complications.
  
  
  CONCLUSIONS
  Urinary 11-dTXB2 concentration is increased in GDV dogs at the time of hospital admission and after surgical derotation of the stomach, compared with that of healthy dogs. An increased urinary 11-dTXB2-to-Cr ratio following surgery is associated with an increased incidence of postoperative complications in dogs with GDV.
authors.affiliation: Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843-4474, USA.
authors.forename: Wendy I
authors.initials: WI
authors.lastname: Baltzer
authors.forename: Maureen A
authors.initials: MA
authors.lastname: McMichael
authors.forename: Craig G
authors.initials: CG
authors.lastname: Ruaux
authors.forename: Laura
authors.initials: L
authors.lastname: Noaker
authors.forename: Jörg M
authors.initials: JM
authors.lastname: Steiner
authors.forename: David A
authors.initials: DA
authors.lastname: Williams
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000601:surgery* / Q000652:urine*; D004285:Dogs; D005260:Female; D013271:Gastric Dilatation / Q000652:urine / Q000662:veterinary*; D007044:Hysterectomy / Q000662:veterinary*; D010052:Ovariectomy / Q000662:veterinary*; D013277:Stomach Volvulus / Q000652:urine / Q000662:veterinary*; D013929:Thromboxane B2 / Q000031:analogs & derivatives* / Q000652:urine
chemical_list: D013929:Thromboxane B2; C049235:11-dehydro-thromboxane B2