the reports do indicate that your uncle is having renal failure
. the high BP
& breathlessness are due to it.
first you need to consult your Doctor and do few investigations like urine routine, sonography
of abdomen,blood gas analysis.
whether the renal failure is chronic or acute-reversible has to be looked upon.
He should be treated with antihypertensives, diuretics to begin with.
If breathlessness , urine output does not improve he may require dialysis
Actual prognosis depends on the type of kidney disease.