May someone with diabetes prick themselves, squeeze out blood and use the electronic blood reader on Shabbos?

Question:

My wife is expecting and was diagnosed with Gestational Diabetes. The doctor said she should monitor her glucose levels 4 times every single day, including Shabbos. May she prick herself (שחיטה) and squeeze out blood (דש) and use the electronic blood reader, 4 times on Shabbos?

Answer: