PMID- 18346139 OWN - NLM STAT- MEDLINE DCOM- 20080922 LR - 20161018 IS - 0891-6640 (Print) IS - 0891-6640 (Linking) VI - 22 IP - 2 DP - 2008 Mar-Apr TI - Thromboelastographic tracings in retired racing greyhounds and in non-greyhound dogs. PG - 374-9 LID - 10.1111/j.1939-1676.2008.0061.x [doi] AB - BACKGROUND: Bleeding disorders in patients with normal coagulation test results are frequently reported in Greyhounds. The purpose of this study was to compare Greyhounds to non-Greyhounds by thromboelastography (TEG). HYPOTHESIS: TEG parameters in Greyhounds are different from those in non-Greyhounds. ANIMALS: Forty-three healthy dogs (28 Greyhounds and 15 non-Greyhounds) based on the results of physical examination, CBC, activated partial thromboplastin time, prothrombin time, fibrinogen, and platelet count. MATERIALS AND METHODS: Recalcified citrated native TEGs were performed in both groups; data were compared using Student's, Mann-Whitney, and Pearson's statistical tests. RESULTS: In Greyhounds, mean +/- SD were as follows: R-time 4.3 +/- 1.7 minutes, K-time 3.8 +/- 1.4 minutes, angle (alpha) 50.0 +/- 8.0 degrees , maximum amplitude (MA) 47.6 +/- 5.6 mm, clot strength (G) 4,647 +/- 1,097 dyn/cm2, and percent lysis at 60 minutes (LY60) 2.8 +/- 5.0%. In the non-Greyhounds they were R-time 3.7 +/- 1.6 minutes, K-time 2.5 +/- 0.9 minutes, angle 59.8 +/- 7.0 degrees , MA 53.1 +/- 5.6 mm, G 5,811 +/- 1,256 dyn/cm2, and LY60 3.1 +/- 2.5%. All parameters were significantly different between the groups, except for R-time and LY60. CONCLUSION: In Greyhounds, clotting kinetics are slower and clot strength are weaker than in non-Greyhounds, supporting the increased tendency to bleed observed after minor trauma or surgical procedures in the breed. The findings may also be attributed to blood viscosity or to the concentration of citrate in the sample (ie, Greyhounds have higher hematocrit and less plasma per unit volume). FAU - Vilar, P AU - Vilar P AD - Department of Veterinary Clinical Sciences and Veterinary Teaching Hospital, The Ohio State University, Columbus, OH 43210, USA. vilarsaavedra.1@osu.edu FAU - Couto, C G AU - Couto CG FAU - Westendorf, N AU - Westendorf N FAU - Iazbik, C AU - Iazbik C FAU - Charske, J AU - Charske J FAU - Marin, L AU - Marin L LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20080310 PL - United States TA - J Vet Intern Med JT - Journal of veterinary internal medicine JID - 8708660 SB - IM MH - Animals MH - Blood Coagulation/*genetics MH - Blood Coagulation Tests/veterinary MH - Breeding MH - Dogs/*blood MH - Female MH - Hemostasis/genetics MH - Male MH - Reference Values MH - Thrombelastography/*veterinary EDAT- 2008/03/19 09:00 MHDA- 2008/09/23 09:00 CRDT- 2008/03/19 09:00 PHST- 2008/03/19 09:00 [pubmed] PHST- 2008/09/23 09:00 [medline] PHST- 2008/03/19 09:00 [entrez] AID - JVIM61 [pii] AID - 10.1111/j.1939-1676.2008.0061.x [doi] PST - ppublish SO - J Vet Intern Med. 2008 Mar-Apr;22(2):374-9. doi: 10.1111/j.1939-1676.2008.0061.x. Epub 2008 Mar 10.