What is the ruling on the Sawm

Q: A man had to go to the hospital during Ramadan while he was fasting, and when he got to the hospital some blood was taken from him. Does this invalidate his Sawm (Fast)?

A: If the amount of blood that was taken from the person concerned is customarily considered a small amount, he does not have to make up for that day. However, if the amount of blood taken from him is customarily considered a large amount, he should make up for that day to avoid an area of scholarly disagreement, and to be on the safe side by discharging his responsibility.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.