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Chronic Kidney Disease

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Presentation on theme: "Chronic Kidney Disease"— Presentation transcript:

1 Chronic Kidney Disease
Sandeep Vetteth

2 Chronic Kidney Disease
A 54 year old woman is evaluated for a Cr of 1.3; 18 months ago it was 0.9. She has a 5 year history of DM 2, dyslipidemia and HTN well controlled with lisinopril, HCTZ, and atenelol. She is also on glipizide and simvastatin. Hemoglobin is normal. What is the most appropriate for this patient? 24 hour collection for proteinuria Kidney USG Measurement of Urine micro albumin SPEP Measurement of HbA1C

3 Chronic Kidney Disease
In the United States, there is a rising incidence and prevalence of Kidney Disease. Nearly 350,000 of these are on dialysis. Also, there is an increasing prevalence of earlier stages of chronic kidney disease which unfortunately is “under-diagnosed” and “under-treated” in the United States. In 2000, the National Kidney Foundation (NKF) Kidney Disease Outcomes Quality Initiative (K/DOQI) Advisory Board approved development of clinical practice guidelines to define chronic kidney disease and to classify stages in the progression of chronic kidney disease.

4 Stages of Chronic Kidney Disease
Kidney damage with normal or ↑ GFR GFR ≥ 90 ml/min/1.73 m2 Stage 2 Kidney damage with mild ↓ GFR GFR 60-89 Stage 3 Moderate ↓ GFR GFR 30-59 Stage 4 Severe ↓ GFR GFR 15-29 Stage 5 Kidney failure GFR <15 (or dialysis)

5 Causes of End Stage Renal Disease
USRDS Annual Data Report

6 Chronic Kidney Disease
Many terms are used to describe states of reduced glomerular filtration (GFR) not requiring renal replacement therapy; Chronic Renal Insufficiency Chronic Renal Failure Renal Insufficiency Pre dialysis renal disease Pre uremia Renal dysfunction They are imprecise & poorly defined.

7 Chronic Kidney Disease
Measurement of GFR Gold standard is Inulin Iothalamate. Creatinine Clearance calculated by timed (24h) urine collection along with serum collection for Creatinine. Overestimate GFR when CKD is severe due to an increase in tubular secretion of creatinine. This factor can be corrected by cimetidine. Estimation of GFR More than 10 formulae for estimation of GFR. MDRD most widely accepted now.

8 CKD – Risk Factors Diabetes Mellitus Hypertension
Cardiovascular Disease Obesity Metabolic Syndrome Age and Race Acute Kidney Injury Malignancy Family history of CKD Kidney Stones Infections like Hep C and HIV Autoimmune diseases Nephrotoxics like NSAIDS

9 CKD - Causes Diabetic Non Diabetic Glomerular
Nephritic: PIGN, IgA, MPGN Nephrotic: FSGS, Membranous, Amyloidosis Tubulointerstitial: Analgesic, Reflux, Ch. Obs Vascular: Vasculitis, HTN, RAS Cystic: ADPKD CKD in transplantation

10 CKD - Causes

11 CKD - Manifestations Abnormal Sodium-Water metabolism
Edema, Hypertension Abnormal Acid-base abnormalities Metabolic Acidosis due to uremia or RTA Abnormal hematopoesis Anemia of CKD Cardiovascular Abnormalities LVH, CAD, Diastolic Dysfunction Abnormal Calcium-Phosphorus metabolism Hyperphosphatemia, pruritus, arthralgia Hyperparathyroidism Renal Osteodystrophy

12 CKD - Management

13 CKD - Management Diagnostic work up to decide underlying etiology
Treatment of Hypertension and Dyslipidemia Treatment of Anemia Treatment of Hyperphosphatemia Avoidance of Dehydration & Nephrotoxic agents Proper Dosing of Drugs Preparation for Renal Replacement Therapy

14 CKD - Evaluation

15 CKD - Evaluation Serum electrolytes
Urine spot protein analysis (24 hour no longer recommended). ANA, C3, C4 SPEP, UPEP Kidney Ultrasound Urine sediment analysis Biopsy Evidence of glomerular disease without diabetes Sudden onset of nephrotic syndrome or glomerular hematuria

16 CKD - Management Diagnostic work up to decide underlying etiology
Treatment of Hypertension and Dyslipidemia Treatment of Anemia Treatment of Hyperphosphatemia Avoidance of Dehydration & Nephrotoxic agents Proper Dosing of Drugs Preparation for Renal Replacement Therapy

17 CKD - Hypertension Anti-Hypertensive Agents
Single most important measure could be adequate BP control Target BP <130/80 with minimal proteinuria and BP<125/75 with significant proteinuria (>1g). ACEIs and ARBs have been demonstrated to slow both diabetic and non-diabetic renal disease in both experimental and human studies. Decrease the sodium intake to 2.5 g /day Usually requires more than 2 medications. Diuretics enhance the antihypertensive and antiproteinuric effects of other agents..

18 CKD - Dyslipidemia Dyslipidemia and Cardiovascular morbidity
Several studies like the 4D study showed no benefit of statins in dialysis patients. However, post hoc analysis of this data does suggest that the management of dyslipidemia in CKD 2 – 4 improves cardiac mortality and morbidity. Dyslipidemia is frequently seen in glomerular disease with proteinuria (nephrotic syndrome) and its control reduces atherosclerosis related morbidity and mortality.

19 CKD - Management Diagnostic work up to decide underlying etiology
Treatment of Hypertension and Dyslipidemia Treatment of Anemia Treatment of Hyperphosphatemia Avoidance of Dehydration & Nephrotoxic agents Proper Dosing of Drugs Preparation for Renal Replacement Therapy

20 CKD - Anemia Decreased quality of life with anemia.
Diagnosis of exclusion. Mostly apparent in the stage 4 and 5 of CKD. Due to decrease in EPO production in the kidney.

21 CKD - Anemia Erythropoietin Epoetin alfa :Procrit ® , Epogen® Darbepoietin Alpha: ARANESP ® Target Hg levels between 11g and 12g but not exceeding 13g. Greater than 13g showed increased mortality as per the CHOIR study. Sufficient Iron should be administered to correct iron stores.

22 CKD - Management Diagnostic work up to decide underlying etiology
Treatment of Hypertension and Dyslipidemia Treatment of Anemia Treatment of Hyperphosphatemia Avoidance of Dehydration & Nephrotoxic agents Proper Dosing of Drugs Preparation for Renal Replacement Therapy

23 CKD - Hyperphosphatemia
Control of Hyperphosphatemia Due to decreased excretion in urine. Control of hyperphosphatemia by dietary measures slow progression in experimental models of CKD. Hyperphosphatemia leads to pruritus, calcification in synovial membranes, blood vessels and even cardiac valves. Therapy includes Phosphorus restriction to 800mg/day and use of phosphrous binders with food. Calcium Carbonate (TUMS), Ca-acetate (PHOSLO) Lanthanum Renagel

24 CKD – Bone and Mineral disease
Hyperparathyroidism: High phosphorus and low Vitamin D causing low calcium. Monitor Intact PTH levels and keep between 100 and 500. Maintain Phosphorus and Calcium within normal ranges. Vitamin D analog paricalcitol. Calcimimetic agents like cinacalcet.

25 CKD - Management Diagnostic work up to decide underlying etiology
Treatment of Hypertension and Dyslipidemia Treatment of Anemia Treatment of Hyperphosphatemia Avoidance of Dehydration & Nephrotoxic agents Proper Dosing of Drugs Preparation for Renal Replacement Therapy

26 CKD - Nephrotoxics Avoidance of Dehydration/Nephrotoxic Agents
Drugs such as Aminoglycosides, NSAIDs Avoiding exposure to Radio contrast agents. In presence of dehydration, even in absence of renovascular disease, ACEIs or ARBs can aggravate renal dysfunction Dehydration is frequent in tubulo-interstitial disorders where urinary concentration is impaired. Proper Dosing of Drugs eg. Allopurinol

27 CKD - Management Diagnostic work up to decide underlying etiology
Treatment of Hypertension and Dyslipidemia Treatment of Anemia Treatment of Hyperphosphatemia Avoidance of Dehydration & Nephrotoxic agents Proper Dosing of Drugs Preparation for Renal Replacement Therapy

28 CKD – Medication Dosing
Proper Dosing of Drugs Uremia affects GI absorption; eg Iron. Impaired plasma protein binding of drugs; eg Dilantin. Increased volume of distribution; Excretion of many drugs depends upon the kidney; Some drugs used in normal dose will lead to nephrotoxic effects eg. Allopurinol Other drugs when used in normal dose will lead to other toxic effects eg. Vancomycin. Dose Reduction or Interval Extension

29 CKD - Management Diagnostic work up to decide underlying etiology
Treatment of Hypertension and Dyslipidemia Treatment of Anemia Treatment of Hyperphosphatemia Avoidance of Dehydration & Nephrotoxic agents Proper Dosing of Drugs Preparation for Renal Replacement Therapy

30 CKD - RRT Preparation for Renal Replacement Therapy
Education for Options of Dialysis & Renal Transplantation for Renal Replacement Hemodialysis Vs Peritoneal Dialysis Avoidance of Veni-puncture & insertion of catheters in peripheral veins once GFR < 60mls. Timely placement of vascular access or PD catheter.

31 CKD - RRT Indications (Absolute): Indications (Relative):
Uncontrolled hyperkalemia and acidosis Uncontrollable hypervolemia (pulmonary edema) Pericarditis AMS and somnolence (advanced encephalopathy) Bleeding diathesis Indications (Relative): Nausea, vomiting and poor nutrition Metabolic acidosis Lethargy and Malaise Worsening kidney function <10 ml or <15 ml in diabetics

32 CKD - RRT Transplantation:
Preemptive transplant carries both patient and graft survival advantage. Graft survival better with living donor kidneys. Immunosuppresion is almost always a must.

33 CKD - RRT Transplantation:
Diseases like FSGS may reccur early in the transplanted kidney. Increased risk for infection, bone loss, cardiovascular disease. Contraindications: Malignancy (recent or metastatic) Current infection Severe extra renal disease Active use of illicit drugs

34 CKD - Summary In creasing prevalence of CKD in the population.
Early detection and prevention of progression. Early involvement of nephrologists in the care (when GFR<30). Treatment of Manifestations and complications. Renal Replacement Therapy Timely referral for Access Timely Transplant Work up.

35 Chronic Kidney Disease
A 70 yr old woman comes for F/U of recently diagnosed CKD and HTN. She is asymptomatic. Her only medications is Lisinopril which has been titrated to its maximum dose in the last 3 months. She is compliant and uses salt restriction. BP is 160/90. exam is normal except for trace pedal edema. Cr is 1.3, K is 5 and Urine Prot is 2.1 gm. Which of the following is the most appropriate treatment for this patient? Chlorthalidone Losartan Metoprolol Minoxidil Amlodipine


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