Hello, Your husband is a known Diabetic and renal failure
patient. Wound healing
is an issue in both of this conditions. Regular monitoring of blood sugar and renal parameters is a must. Keep both the things under control.
Lifestyle changes like weight reduction is also advised.
Give good wound care and avoid pressure to the wound site.
Any surgical procedure will have its complications, it is the duty of the doctor to keep to patient and his family well informed about it.