PROTEINURIA DR HEDAYATI. INTRODUCTION URINARY PROTEIN > 150mg/day More than 1 time ↑ capillary...
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Transcript of PROTEINURIA DR HEDAYATI. INTRODUCTION URINARY PROTEIN > 150mg/day More than 1 time ↑ capillary...
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PROTEINURIA DR HEDAYATI
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INTRODUCTION
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URINARY PROTEIN > 150mg/day More than 1 time ↑ capillary permeability
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ISOLATED PROTEINURIA PROTEINURIA WITHOUT HEMATURIA WITHOUT ↑ IN CREATININE
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ISOLATED PROTEINURIA MAY BE ASYMPTOMATIC HEAVY PROTEIONURIA ,
LIPIDURIA ,EDEMA , +/- ACTIVE URINE SEDIMENT
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SCREENING NO COST- EFFECTIVE FOR GENERAL
POPULATION, < 60y/o HIGH RISK PATIENTS : DM HTN → ACEI or ARB SLOWING THE PROGRESSION OF PROTEINURIA
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TYPES OF PROTEINURIA Glomerular proteinuria Tubular proteinuria overflow proteinuria
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Glomerular proteinuria
↑ filteration of macromolecules Diabetic nephropathy ,glomerulopathy , exercise-induced, orthostatic proteinuria Most : 1-2g/day
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Tubular proteinuria
Low molecular wt proteins Interference with PCT reabsorption No detection by dipstick
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overflow proteinuria
↑ excretion of LMW Almost always : MM Others : AML ( Lysozyme ) Rhabdomyolysis ( Myoglobin) Hemolysis ( Hb) Filtered load > reabsorption by PCT
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MIXED FORMS OF PROTEINURIA MM FSGS
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MEASUREMENT
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STANDARD URINE DIPSTICK ALBUMIN COLORIMETRIC REACTION TETRABROMOPHENOL GREEN SHADES GLOMERULAR PROTEINURIA HIGH SPECIFIC NOT VERY SENSITIVE ( + ONLY : > 300-
500 mg/d )
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STANDARD URINE DIPSTICK INSENSITIVE METHOD TO DETECT INITIAL
INCREASE IN PROTEIN EXCRETION MICROALBUMINURIA (DIABETIC
NEPHROPATHY ) FALSE POSITIVE : CONTRAST ( 24 h ).
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STANDARD URINE DIPSTICK GRADING : NEGATIVE 1 + : 15-30 mg /dL 2 + : 30-100 mg/dL 3 + : 100-300 mg/dL 4 + : > 1000 mg/dL ROUGH GUIDE : URINE VOLUME
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SULFOSALICYLIC ACID ALL PROTEINS AKI + BENIGN U/A +NEGATIVE
DIPSTICK :MM SULFOSALICYLIC ACID : + URINE DIPSTICK : - → NONALBUMIN PROTEINS MOST : LIGHT Ig
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SULFOSALICYLIC ACID 1 part urine urine + 3 part SSA3% TURBIDITY GRADING: 0 TRACE : 1-10 mg/dL 1+ : 15-30 mg/dL 2+ : 40-100 mg/dL 3+ : 150-300 mg/dL 4+ : > 500 mg/Dl FALSE POPSITIVE : CONTRAST (24h )
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LYSOZYME AML URINE DIPSTICK : + SSA : + NO OTHER SIGNS OF NEPHROTIC
SYNDROME DIRECT MEASUREMENT
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QUANTITATIVE MEASUREMENT BENIGN FORMS : < 1-2 g/d PROGNOSTIC IMPORTANCE MONITOR THE RESPONSE TO THERAPY
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QUANTITATIVE MEASUREMENT 24 HOUR URINE RANDOM URINE : PROTEIN /Cr ratio (mg/
g) ~ daily protein excretion (g/m2 ) SERIAL MONITORING
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MICROALBUMINURIA NL ALBUMIN EXCRETION : < 20mg/d MICROALBUMINURIA : 30-300 mg/d SPECIFIC DIPSTICKS ALBUMIN/Cr RATIO
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APPROACH TO PROTEINURIA
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HISTORY PHYSICAL EXAMINATION If systemic disease : MANAGEMENT OF PROTEINURIA :MANAGEMENT OF DISEASE
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URINE EXAMINATION ALL PATIENTS URINE SEDIMENT REPEATED
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R/O TRANSIENT PROTEINURIA COMMON FEVER, EXERCISE (Ag – NEP) NO FURTHER EVALUATION
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R/O ORTHOSTATIC PROTEINURIA < 30y/o ↑ proteinuria in UPRIGHT POSITION BUT NL in SUPINE < 1g/d Benign / No further evaluation
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R/O ORTHOSTATIC PROTEINURIA First morning : - 16 hour : 7 am- 11 pm NL activity . Recumbent position : 2 hours before
daytime collection finished Overnight collection : 11 pm- 7 am
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R/O ORTHOSTATIC PROTEINURIA Protein /Cr ratio: First morning Before bed
Must be normal excretion in SUPINE
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Persistent proteinuria Underlyiong disease BUN ,Cr Quantitative measurement Kidney sonography Refer to nephrologist Renal biopsy
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PROGNOSIS
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GLOMERULAR PROTEINURIA : QUANTITY OF PROTEINURIA NON-NEPHROTIC > NEPHROTIC PERSISTENT MONITORING