Welcome in H.M.C.
I have gone through your query regarding operation for feeding tube
in your mother as at present she is on Ryle's tube feeding.
Since your mother is 80 years old and is hemiplegic and she is getting feeding by Ryle's tube , but during change of tube problem arise for reinserting tube up to stomach. You have not clear about problem in food pipe for which external gastrostomy is adviced.
If your mother has some obstructive lesion in esophagus
than it (gastrostomy) is recomonded.
This is an small operation for better nourishment to patient.