Acute renal failure classification: Difference between revisions
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** [[Toxin]]s or [[medication]] (e.g. some [[NSAID]]s, [[aminoglycoside]] [[antibiotics]], [[iodinated contrast]], [[Lithium salt|lithium]]) | ** [[Toxin]]s or [[medication]] (e.g. some [[NSAID]]s, [[aminoglycoside]] [[antibiotics]], [[iodinated contrast]], [[Lithium salt|lithium]]) | ||
** [[Rhabdomyolysis]] (breakdown of [[muscle]] tissue) - the resultant release of [[myoglobin]] in the [[blood]] affects the kidney; it can be caused by [[injury]] (especially crush injury and extensive [[blunt trauma]]), [[statin]]s, [[stimulant]]s and some other drugs | ** [[Rhabdomyolysis]] (breakdown of [[muscle]] tissue) - the resultant release of [[myoglobin]] in the [[blood]] affects the kidney; it can be caused by [[injury]] (especially crush injury and extensive [[blunt trauma]]), [[statin]]s, [[stimulant]]s and some other drugs | ||
** [[ | ** [[Hemolysis]] (breakdown of [[red blood cell]]s) - the [[hemoglobin]] damages the [[tubules]]; it may be caused by various conditions such as [[sickle-cell disease]], and [[lupus erythematosus]] | ||
** [[ | ** [[Multiple myeloma]], either due to [[hypercalcemia]] or "cast nephropathy" (multiple myeloma can also cause [[chronic renal failure]] by a different mechanism) | ||
** | ** Acute [[glomerulonephritis]] which may be due to a variety of causes, such as [[anti glomerular basement membrane disease]]/[[Goodpasture's syndrome]], [[Wegener's granulomatosis]] or acute [[lupus nephritis]] with [[systemic lupus erythematosus]] | ||
* ''Post-renal'' (obstructive causes in the urinary tract) due to: | * ''Post-renal'' (obstructive causes in the urinary tract) due to: | ||
Revision as of 01:02, 24 December 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Aarti Narayan, M.B.B.S [2]
Overview
Acute renal failure can complicate a wide spectrum of disorders, and for the purpose of diagnosis and management is divided according to the mechanism that lead to renal compromise. The three categories are pre-renal azotemia (diseases that cause renal hypoperfusion), renal azotemia (diseases directly affecting the renal parenchyma), and post-renal azotemia (diseases affecting the urinary tract causing obstruction).
Classification
Acute renal failure is usually categorised (as in the flowchart below) according to pre-renal, renal and post-renal causes.
| Acute Renal Failure | |||||||||||||||||||||||||||||||||
| Pre-renal | Renal | Post-renal | |||||||||||||||||||||||||||||||
- Pre-renal (compromise in the renal blood flow):
- Hypovolemia (decreased blood volume) -
- Shock, hemorrhage, burns, dehydration
- Fluid loss from diuretics use, diabetes mellitus, hypoadrenalism
- Gastrointestinal fluid loss: vomiting, surgical drainage, diarrhea
- Extra-vascular space sequestration: pancreatitis, hypoalbuminemia, peritonitis, trauma, burns
- Low cardiac output -
- Cardiac arrhthymia's
- Congestive heart failure: left ventricular failure, right ventricular failure
- Valvular disorders: severe aortic stenosis
- Severe pulmonary hypertension, massive pulmonary emobolism
- Systemic vasodilatation -
- Hepatorenal syndrome in which renal perfusion is compromised in liver failure ([[cirrhosis with ascites)
- Vascular problems -
- Atheroembolic disease
- Renal vein thrombosis (which can occur as a complication of the nephrotic syndrome)
- Renal hypoperfusion from cyclooxygenase inhibitors, ACE inhibitors
- Renal vasoconstriction from hypercalcemia, cyclosporine, tacrolimus and amphotericin B
- Hyperviscosity syndrome -
- Hypovolemia (decreased blood volume) -
- Renal (damage to the kidney itself):
- Infection usually sepsis (systemic inflammation due to infection),rarely of the kidney itself, termed pyelonephritis
- Toxins or medication (e.g. some NSAIDs, aminoglycoside antibiotics, iodinated contrast, lithium)
- Rhabdomyolysis (breakdown of muscle tissue) - the resultant release of myoglobin in the blood affects the kidney; it can be caused by injury (especially crush injury and extensive blunt trauma), statins, stimulants and some other drugs
- Hemolysis (breakdown of red blood cells) - the hemoglobin damages the tubules; it may be caused by various conditions such as sickle-cell disease, and lupus erythematosus
- Multiple myeloma, either due to hypercalcemia or "cast nephropathy" (multiple myeloma can also cause chronic renal failure by a different mechanism)
- Acute glomerulonephritis which may be due to a variety of causes, such as anti glomerular basement membrane disease/Goodpasture's syndrome, Wegener's granulomatosis or acute lupus nephritis with systemic lupus erythematosus
- Post-renal (obstructive causes in the urinary tract) due to:
- medication interfering with normal bladder emptying.
- benign prostatic hypertrophy or prostate cancer.
- kidney stones.
- due to abdominal malignancy (e.g. ovarian cancer, colorectal cancer).
- obstructed urinary catheter.