What damage done to your body would be considered סכנת אבר, and what shabbat prohibitions can you break. This is a NON סכנת נפשות case.
Mi Yodeya is a question and answer site for those who base their lives on Jewish law and tradition and anyone interested in learning more. Join them; it only takes a minute:
Here's how it works:
- Anybody can ask a question
- Anybody can answer
- The best answers are voted up and rise to the top
My understanding from Rabbonim today is that anything that is a סכנת אבר is going to lead to surgery, which is going to lead to general anesthetic, which is סכנת נפשות. Certainly as a ספק.
Therefore, today there is no practical distinction.