The moment Lu Nai He received the call from their hospital in the American branch he already had an idea that it was about Samantha and he was right it really is about her. Experiencing a relapse during this time is very crucial for her since she was about to get a transplant.
Furthermore, he's a doctor so he knew best the risks of this incident to the patient and added the fact that they also have to consider the donor's limit. Although the donor was already considered brain dead and the only thing that's keeping him alive are the machines they still don't know for how long can the body hold on.
As soon as he cleared his schedule for the day he went straight to Lim Yi Sheng's office and there he saw the man in deep thought.
"You must have heard it from Doctor William." he went ahead and sat down in front of his friend. It's completely unnecessary to beat around the bush.