PreOp Examination

After euthanizing your mouse with carbon dioxide, there are some observations that need be made before dissection begins.

1. Look for exudates from the eyes, mouth, and anal-genital region.

2. Has the mouse been grooming him/herself properly or is the fur clumped and matted?

3. Palpate the body to find any lumps or bumps that should be noted and which require precautions when opening the body cavity.

4. Is the animal dehydrated (when pinching the skin, it takes a few seconds to regain its former position) and has the animal lost any weight suddenly?

5. If there is anything out of place with the animal, note it on your necropsy sheet for future reference.

The pictures above will help you make geographical descriptions of any lesions you may find. The list of terms may help you with any descriptives as well. The locations can be used to describe lesions not only on the animal itself, but on the individual organs and structures as well. Keep in mind, when performing a necropsy, the animal's left and right are opposite yours when the ventral side is facing up.