The National Kidney Foundation (NKF...

The National Kidney Foundation (NKF) (1) defines chronic kidney disease as kidney damage or a glomerular filtration rate (GFR) of les than 60 mL National Kidney Foundation (NKF)1 defines chronic kidney disease as kidney damage or a glomerular filtration rate (GFR) of les by means of minute per 1.73 [m.sup.2] (body surface area) for three month or more. (1) This GFR rate corresponds with a serum creatinine concentration higher than 15 mg by dL (132.6 [micro]mol per L) in men and higher than 13 mg by means of dL (114.9 [micro]mol per L) in women (23) Chronic kidney disease also can be defined by way of the presence of urinary albumin in an excretion rate higher than 300 mg through 24 hours or in a ratio of more than 200 mg of albumin to 1 g of creatinine (3) (Table 1) (145)

Chronic kidney disease commonly affects as many as 20 million Americans. (3) The incidence and prevalence of the disease have doubled in the past decade, in the greatest degree likely because improved treatments for hypertension, diabetes mellitus, and coronary disease have increased longevity in affected patients and, therefore, their likelihood of developing chronic kidney disease. Estimated medical and other economic prices of chronic kidney disease are look forward toed to approach $28 billion annually by way of 2010, with an additional $90 billion in annual outlays related to associated increased cardiovascular disease, infections, and hospitalizations. (3)

Causes of chronic kidney disease include diabetes mellitus, hypertension, ischemia, infection, obstruction, toxins, and autoimmune and infiltrative diseases. Although it is important to identify the cause(s) of chronic kidney disease in this way that specific therapy can be instituted, the disease oftentimes progresses despite appropriate treatment. As kidney function deteriorates, patients cause to grow complications related to fluid overload, electrolyte and acid-base imbalances, and the build-up of nitrogenous waste. To survive, about patients eventually need hemodialysis or kidney transplantation.

This article reviews the instant recommendations and therapeutic strategies for preventing or delaying the progression of chronic kidney disease and the growth of complications such as hypertension, hyperglycemia, hyperlipidemia, anemia, and renal osteodystrophy Recommendations for nutrition and smoking cessation also are discussed.

CLASSIFICATION OF SEVERITY AND MONITORING OF DISEASE PROGRESSION

The GFR is used to assess the extent of kidney-function impairment and to monitor disease progression and treatment answer GFR is a measure of the overall filtration rate of all nephron In human frames 30 years or younger, the normal GFR is approximately 125 mL by minute per 1.73 m2; after the age of 30 years, GFR declines from 1 mL per minute by 1.73 m2 per year.

Estimation of the GFR no longer requires a 24-hour urine collection for creatinine clearance if it be not that can be accomplished with similar accuracy using a mathematic formula. (1) The in the greatest degree commonly used formulas for estimating GFR in patients with stable chronic kidney disease are the Modification of Diet in Renal Disease (MDRD) equation and the Cockcroft-Gault equation (Table 2) (6-8)

Proteinuria is another marker of kidney injury. It is measured in a timed (over-night or 24-hour) urine collection or in an untimed (spot) urine sample by way of calculating the ratio of protein or albumin to creatinine (Table 1) (145)

The NKF Kidney Disease result Quality Initiative (K/DOQI) stratifies chronic kidney disease into five stages based onward the GFR and metabolic events (Table 3). (1) The NKF recommends actions to slow disease progression. (1)

HYPERTENSION

Hypertension is a common cause of chronic kidney disease. Systemic hypertension causes direct damage to small family vessels in the nephron. The kidneys throw away their ability to autoregulate glomerular filtration arise and pressure, with resultant hyperfiltration manifesting as albuminuria and proteinuria. When the proximal convolut tubule reabsorbs the exces protein, secretion of vasoactive substances further damages the glomerular-tubular apparatus. (9) Nephron damage activates the rennin-angiotensin-aldosterone connected view resulting in increased sympathetic tone and fluid overload, which intermingle the progression of hypertension and nephron los (10)

Several trials (11-13) have demonstrated the benefit of strict vital fluid pressure control in slowing the progression of kidney disease. Thus, the seventh report of the Joint National Committee in succession Prevention, Detection, Evaluation, and Treatment of High kindred Pressure recommends a target children pressure of less than 130/80 mm Hg in patients with chronic kidney disease. (2)

Angiotensin-converting enzyme (ACE) inhibitors and angiotensin-II receptor antagonists preferentially lower intra-glomerular urgency and reduce proteinuria. Ample evidence displays that these agents are more effective than other anti-hypertensive unsalable articles in preventing the progression of kidney disease. (111214-19)

The Ramipril Efficacy in Nephropathy investigation (15) found a significantly higher GFR and a lower rate of GFR decline in patients without diabetes who received the ACE inhibitor ramipril than in similar patients who were given placebo.