Local synovial fluid
aspiration culture and suitable antibiotic, Xray/Ct scan for position of prostheses and surrounding bone. After control of infection,diabetes Get re-evaluation by hip surgeon.
As a first step debridement of unhealthy tissue under local or regional anesthesia
can be done if infection is controlled by anti-biotic after C/S of aspirate.
>Infected and loosened prosthesis
means removal and total hip replacement
after control of infection,
As he can't undergo surgery , some salvage method has to be worked out by your Doc.