Facial vein bleeding

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Try out PMC Labs and tell us what you think. Learn More. Many biomedical research protocols for mouse models involve serial blood collection and analysis. Two common techniques for serial blood collection in this species are the retrobulbar RB, also called retroorbital and facial vein FV methods.
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Bleeding the Laboratory Mouse: Not All Methods are Equal

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Blood Withdrawal II | Protocol

Retro-bulbar sinus puncture and facial vein phlebotomy are two widely used methods for blood sampling in laboratory mice. However, the animal welfare implications associated with these techniques are currently debated, and the possible physiological and pathological implications of blood sampling using these methods have been sparsely investigated. Therefore, this study was conducted to assess and compare the impacts of blood sampling by retro-bulbar sinus puncture and facial vein phlebotomy. Body weights were measured at the day of blood sampling and the day after blood sampling, and the food consumption was recorded automatically during the 24 hours post-procedure. At the end of study, cheeks and orbital regions were collected for histopathological analysis to assess the degree of tissue trauma. Mice subjected to facial vein phlebotomy had significantly elevated plasma corticosterone levels at both time points in contrast to mice subjected to retro-bulbar sinus puncture, which did not. Both groups of sampled mice lost weight following blood sampling, but the body weight loss was higher in mice subjected to facial vein phlebotomy.
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Blood Withdrawal II

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Try out PMC Labs and tell us what you think. Learn More. The laboratory mouse is the most frequently used animal model for hematologic studies and for assessment of blood parameters across a broad range of disciplines. Often, analysis of blood occurs in a non-terminal manner.
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