He has/had diabetes and got dialysis for them. He would need dialysis for treatment, and likely lost a foot and suffered very low blood pressure if he didn't get them.
Dialysis patients only last a few years anyway, I believe.
People with end stage renal failure requiring dialysis must dialyze every 72 hours. If he required that level of attention he is long dead. I cannot imagine there are many dialysis centers in Afganistan or Pakistan.
As long as medical attention is available, he can live indefinitely without any impairment. The fact that we have not heard from him in so long suggests he is no longer alive, but if anyone read Arnaud deBorchgrave's latest, he may be in the protective custody of the ISI.
