Rosie,
I just had a thought (although maybe you already considered).
Your brother must have some kind of medical insurance in his country of residence.
Although you did not mention the place he is normally living, I do know from experience, that many of the medical insurances that you pay into for yourself and family etc have recipricol arrangements (to some extent) with other countries.
When I lived in Japan my medical insurance did cover many aspects when I visited Philippines.
Anyway, it's surely worth investigating at this stage.