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Establishment of normal reference intervals in dogs using a viscoelastic point‐of‐care coagulation monitor and its comparison with thromboelastography
Author(s) -
Buriko Yekaterina,
Drobatz Kenneth,
Silverstein Deborah C.
Publication year - 2020
Publication title -
veterinary clinical pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.537
H-Index - 51
eISSN - 1939-165X
pISSN - 0275-6382
DOI - 10.1111/vcp.12926
Subject(s) - thromboelastography , thromboelastometry , medicine , hemostasis , point of care testing , point of care , biomedical engineering , population , coagulation testing , coagulation , concordance , anesthesia , surgery , pathology , environmental health
Abstract Background Viscoelastic coagulation devices are a useful adjunct to the evaluation of hemostasis in veterinary patients. VCM Vet is a point‐of‐care device that is simple in operation and could be used to diagnose and trend hemostatic abnormalities in sick patients. VCM Vet does not use activators. Objectives We aimed to establish reference intervals (RIs) for VCM Vet in a healthy adult canine population and concurrently perform thromboelastographic (TEG) analysis on these samples with and without tissue factor (TF) activation for RI comparisons. Methods Duplicate VCM Vet tests were performed immediately upon sample collection. Two concurrent TEG tests were performed on the remaining blood, one citrated, untreated (CU), and one activated with TF at a 1:3600 dilution. Results Fifty‐two dogs were enrolled in the study. The following RIs were generated for VCM Vet machine 1 and 2, respectively: clot time (CT) (seconds) 163‐480 and 172‐457; clot formation time (CFT) (seconds) 104‐288 and 94‐252, α‐angle (degrees) 41‐65 and 44‐66, and maximum clot firmness (MCF) (no units) 27‐43 and 30‐46. Moderate to good correlations were observed between the two machines with Lin’s concordance correlation coefficients of 0.51‐0.9 and a P < 0.002. TEG RIs were similar to previously reported values. Conclusions VCM Vet RIs were generated. Each VCM Vet device should have a unique RI established due to inter‐device variability. Direct correlations of VCM Vet values with TEG parameters were not performed due to the narrow range of the normal values and the need to evaluate patients with a wide range of hemostatic abnormalities.