Hello,
The patient in question has a bad
bed sore post surgery, and a low BP. The low BP is in most likelihood a manifestation of
sepsis, an infection of the blood, as bacteria from the bed sore would have spread into his blood. It is a very treatable condition. Sepsis is very serious, of course, but with appropriate antibiotics and supportive measures, in the form of cardiac supportive measures, and breathing supportive measures, the outcome is very good.
So I would say allow the doctors to do their job, allow the heroic measures to be taken, because there is a good chance that this patient will recover.
Even
renal failure happens in such circumstances due to decreased blood pressure and once the
vital signs normalize and the infection resolves, the patient can regain his
kidney function.
Regarding his lifespan, he might not have a very long and healthy life, considering the comorbidities that are associated with obesity, however, obese people do live well into their 60's and even beyond, especially if they take care of their health.
Best regards.