It is said that medicine is in a crisis. Of course, there is an ethical crisis concerning the question whether really everything should be done that could be done. Then there is an economic crisis as it becomes ever harder to afford all current diagnoses and treatments. But most of all, there is an epistemological crisis as the epistemic developments of the last hundred years have only hesitantly been incorporated into the medical thinking and discourse.
This paper reviews tools of systems theory and complexity management and investigates their applicability for medical purposes. It shows that comparable concepts have already been used effectively in medicine. Finally, this paper tries to give an outline about how a medicine based on systems theory might look like.