Mouse maxillary facial vein blood collection

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Bleeding the Laboratory Mouse: Not All Methods are Equal

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Bleeding the Laboratory Mouse: Not All Methods are Equal

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

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. However, the small body size of the mouse limits collection based upon volume, frequency, and accessible sites.
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