Thank you all for your thoughts. We sure do need them right now. I'm sorry for the graphic nature of the photo, but just to give you an idea of the severity...
She impaled herself on a old rusty table. She slipped on the ice and slid right into it.
This explains the two huge lacerations, an entrance and exit wound.
I didn't actually see her fall, just saw her slip and heard her cry out. My initial thoughts were that she tore her ACL but then I saw her. I panicked. I'm alone up at work this week because the boss is out at an acupuncture class...go figure. I rushed her to an ER vet down in town and she was taken into surgery right away. We are so, so, so very lucky that she didn't hit any major arteries or veins. She probably would be dead right now if she did because I couldn't do enough by myself...