Evaluation of the Effect of Storage Time on ROTEM S® Parameters in Healthy and Ill Dogs.

Weingand, Nicole; Vuille-dit-Bille, Johanna; Jud Schefer, Rahel; Kutter, Annette P N; Stirn, Martina; Adamik, Katja-Nicole; Sigrist, Nadja E (2022). Evaluation of the Effect of Storage Time on ROTEM S® Parameters in Healthy and Ill Dogs. Animals, 12(15) MDPI 10.3390/ani12151996

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Viscoelastic testing as a bedside test to assess global haemostasis has gained popularity in the past decade, with rotational thromboelastometry (ROTEM) and thromboelastography (TEG) being the two commonly used devices. TEG studies suggest analysis 30 min after blood sampling. However, the reproducibility of results over time for ROTEM analysis using lyophilized samples in dogs has not been established. In this study, we investigated the influence of time on viscoelastic testing, using 33 healthy staff-/client-owned dogs for blood sampling and repeated measurements of ROTEM tracings at three different time points after blood collection. Additionally, a group of 21 hospitalized patients with suspected coagulation disorders were included to investigate whether stability over time was comparable between healthy and ill dogs. We demonstrated a significant difference of ROTEM tracings over time, with a tendency towards hypocoagulability over time. These changes do have a clinical relevance as they exceed reference intervals and could therefore lead to erroneous conclusions about a patient's coagulation status. Therefore, time-specific reference intervals are proposed and presented in this publication.

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