Lange Renal Reading Flashcards
Hyaline casts
Concentrated urine, febrile disease, after strenuous exercise, in the course of diuretic therapy (not indicative of renal disease)
Red cell casts
Glomerulonephritis
White cell
casts
Pyelonephritis, interstitial nephritis (indicative of infection or inflammation)
Coarse,
granular casts
Nonspecific; can represent acute tubular necrosis
Conditions elevating creatinine
Ketoacidosis, cephalothin, cefoxitin, flucytosine - Noncreatinine chromogen
Other drugs: aspirin, cimetidine, probenecid,
trimethoprim - Inhibition of tubular creatinine secretion
Conditions decreasing creatinine
Advanced age - Physiologic decrease in muscle mass
Cachexia - Pathologic decrease in muscle mass
Liver disease - Decreased hepatic creatine synthesis and
cachexia
Conditions affecting BUN independently of GFR.
Increased BUN
Reduced effective circulating blood volume (prerenal azotemia)
Catabolic states (gastrointestinal bleeding, corticosteroid use)
Highprotein
diets
Tetracycline
Conditions affecting BUN independently of GFR.
decreased BUN
Liver disease
Malnutrition
Sickle cell anemia
SIADH
Etiology
Prerenal Azotemia -
Postrenal Azotemia -
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) -
Acute Glomerulonephritis -
Acute Interstitial Nephritis -
Prerenal Azotemia - Poor renal perfusion
Postrenal Azotemia - Obstruction of the urinary tract
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) - Ischemia,
nephrotoxins
Acute Glomerulonephritis - Immune complexmediated, pauciimmune, antiGBM
related
Acute Interstitial Nephritis - Allergic reaction; drug reaction; infection,
collagen vascular disease
Serum
BUN:Cr
ratio
Prerenal Azotemia -
Postrenal Azotemia -
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) -
Acute Glomerulonephritis -
Acute Interstitial Nephritis -
Prerenal Azotemia - > 20:1
Postrenal Azotemia - > 20:1
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) - 20:1
Acute Interstitial Nephritis -
UNa (meq/L)
Prerenal Azotemia -
Postrenal Azotemia -
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) -
Acute Glomerulonephritis -
Acute Interstitial Nephritis -
Prerenal Azotemia - > 20:1
Postrenal Azotemia - variable
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) - > 20:1
Acute Glomerulonephritis -
FE (%)
Prerenal Azotemia -
Postrenal Azotemia -
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) -
Acute Glomerulonephritis -
Acute Interstitial Nephritis -
Prerenal Azotemia -
Urine
osmolality
(mosm/kg)
Prerenal Azotemia -
Postrenal Azotemia -
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) -
Acute Glomerulonephritis -
Acute Interstitial Nephritis -
Prerenal Azotemia - >500
Postrenal Azotemia -
Urinary
sediment
Prerenal Azotemia -
Postrenal Azotemia -
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) -
Acute Glomerulonephritis -
Acute Interstitial Nephritis -
Prerenal Azotemia - Benign or hyaline casts
Postrenal Azotemia - Normal or red cells, white cells, or crystals
Intrinsic Renal Disease
Acute Tubular Necrosis Oliguric or Polyuric) - Granular muddy brown) casts, renal tubular casts
Acute Glomerulonephritis - Red cells, dysmorphic red cells and red cell casts
Acute Interstitial Nephritis - White cells, white cell casts, with or without eosinophils
Stages of chronic kidney disease 1
Kidney damage with normal or ↑↑ GFR
≥ 90
Diagnosis and treatment. Treatment of comorbid conditions. Slowing of progression. Cardiovascular disease risk reduction.
Stages of chronic kidney disease 2
Kidney damagewith mildly ↓ GFR
60–89
Estimating progression.
Stages of chronic kidney disease 3
Moderately ↓GFR
30–59
Evaluating and treating complications.
Stages of chronic kidney disease 4
Severely ↓ GFR
15–29
Preparation for kidney replacement therapy.
Stages of chronic kidney disease 5
Endstage-renal disease (ESRD)
Primary glomerular diseases
Focal and segmental glomerulosclerosis Membranoproliferative glomerulonephritis IgA nephropathy Membranous nephropathy Alport syndrome (hereditary nephritis)
Secondary glomerular diseases
Diabetic nephropathy Amyloidosis Postinfectious glomerulonephritis HIVassociated nephropathy Collagenvascular diseases (eg, SLE) HCVassociated membranoproliferative glomerulonephritis
Tubulointerstitial nephritis causes
Drug hypersensitivity Heavy metals Analgesic nephropathy Reflux/chronic pyelonephritis Sickle cell nephropathy Idiopathic
Cystic diseases
Polycystic kidney disease
Medullary cystic disease
Obstructive nephropathies
Prostatic disease
Nephrolithiasis
Retroperitoneal fibrosis/tumor
Congenital
Vascular diseases
Hypertensive nephrosclerosis
Renal artery stenosis
Symptoms and signs of uremia. General
Symptoms -Fatigue, weakness
Signs - Sallowappearing,
chronically ill
Symptoms and signs of uremia.
skin
Symptoms -Pruritus, easy bruisability
Signs - Pallor, ecchymoses,
excoriations, edema, xerosis
Symptoms and signs of uremia. ent
Symptoms -Metallic taste in mouth, epistaxis
Signs - Urinous breath