Diabetic Nephropathy Diagnosis and Management

Clinical Presentation and Diagnosis

The American Diabetes Association recommends that patients with long-standing type 2 diabetes, hypertension, and significant proteinuria (urinary albumin to creatinine ratio ≥300 mg/g) be diagnosed with overt diabetic nephropathy 1, 2
The presence of macroalbuminuria (protein-to-creatinine ratio of 0.6 or 600 mg/g) is diagnostic of overt diabetic nephropathy, with a threshold for clinical albuminuria of ≥300 mg/g creatinine 3, 2
Stage 3 chronic kidney disease, indicated by an eGFR of 46 mL/min/1.73 m², is consistent with progressive diabetic nephropathy 2, 4
Hypertension coexists in approximately one-third of patients with type 2 diabetes at diagnosis and is commonly related to underlying diabetic nephropathy 1, 5
Suboptimal glycemic control, indicated by an HbA1c of 8.0%, accelerates the progression of diabetic nephropathy 1, 2

The American Diabetes Association recommends intensifying glycemic control to reduce HbA1c toward <7% to slow nephropathy progression 1, 2
Optimizing blood pressure to a target BP of <130/80 mmHg is recommended for diabetic patients with nephropathy 1, 4
Continuing ARB therapy, such as losartan, is specifically indicated for diabetic nephropathy with elevated serum creatinine and proteinuria (urinary albumin to creatinine ratio ≥300 mg/g) in patients with type 2 diabetes and hypertension [2, @12@]
Referral to a nephrologist experienced in diabetic renal disease is recommended for patients with eGFR <60 mL/min/1.73 m² 2, 4, 6
Initiating protein restriction to <0.8 g/kg body weight per day (approximately 10% of daily calories) is recommended 2, 4, 6