If your brother has lung fibrosis
and is advised lung transplant
, it may be the only definitive therapy.
First decide if you are ready for this surgery. Issues involved are
1 cost of surgery
2 success rate of surgery - depends on your brothers disease , and other body condition
3 availability of experts for surgery- done in very few centres.
4 availability of donor lungs
5 after surgery your brother needs to be on regular drugs ( which are also costly)
Till the time surgery is done , brother may need to be on oxygen ( if the blood level of oxygen is below 90% at rest) .
In case you are at hospital only for the purpose of oxygen , you may consider home oxygen therapy
You can either arrange for a oxygen cylinder at home ( needs refills like LPG cylinder - costly in long run)
or you can buy an oxygen concentrator ( works on electricity , takes in room air and gives out 40-70 % oxygen - costs 40000 INR and above - or take on monthly rental of ~INR 3500 )