Well, yes. There's the famous case of when a station's only doctor had appendicitis so he removed his own [1], and another who had to do her own cancer biopsy and chemotherapy [2]. The equations may be simple but they are still very cold.

[1] Leonid Rogozov, 1961. https://www.bbc.com/news/magazine-32481442

[2] Jerri Nielsen, 1998. https://en.wikipedia.org/wiki/Jerri_Nielsen