Reports of your mother suggests that her sugar levels are highly uncontrolled and hemoglobin
Creatinine levels are border line and require other kidney function tests to look for signs of diabetic nephropathy
.Her 24 hours urine must be checked for the total amount of protein passed.
You must make sure that the diabetes be controlled meticulously by your mother as it can have far reaching consequences.
Other problem mentioned by you is local swelling of left foot.
Since the swelling is in one foot,it gives a strong suspicion of development of diabetic foot
Diabetic foot is a very dangerous consequence of uncontrolled diabetes
and if not taken care of properly,it results in gangrene and amputation.
You must immediately take your mother to some hospital and get her the required treatment.
Other possibility could be a deep venous thrombosis
because of prolonged immobilisation.