Stunning photograph. Really I love the perspective you created in this. I am not an expert at photography, but I am gonna give this critique a shot!!!
I really think your lighting is perfect here. You have the perfect amount of light reflecting on the 'blood' and also on the little bottle.
The only thing I wold change maybe it the surface underneath it all. I would like to maybe see something that would make the red pop more. Like a darker blue, or maybe a green.... But i am not sure. It's tricky cause you don't want the surface's color to be more dominant than the red, that would just defeat the whole purpose of the picture.
But yeah, I really love this picture!!!!
Please note that all opinions expressed in this critique are my own. Therefor take from it what you want and leave the rest behind.