Azotemia
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| Azotemia Classification and external resources | |
| ICD-10 | R79.8 |
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| ICD-9 | 790.6 |
| DiseasesDB | 26060 |
| MeSH | D053099 |
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Azotemia is a medical condition characterized by abnormal levels of nitrogen-containing compounds, such as urea, creatinine, various body waste compounds, and other nitrogen-rich compounds in the blood. The cause is usually insufficient filtering of the blood by the kidneys.
Azotemia can be classified according to its cause. In prerenal azotemia the blood supply to the kidneys is inadequate. In postrenal azotemia the urinary outflow tract is obstructed. Other forms of azotemia are caused by diseases of the kidneys themselves.
Other causes of azotemia include congestive heart failure, shock, severe burns, prolonged vomiting or diarrhea, some antiviral medications, liver failure, or trauma to the kidneys.
Uremia is a broader term referring to the pathological manifestations of severe azotemia. Azotemia is one of many clinical characteristics of uremia, which is a syndome characteristic of renal disease. Uremia includes azotemia, as well as acidosis, hyperkalemia, hypertension, anemia and hypocalcemia along with other findings.
Signs and symptoms (prerenal azotemia)
In alphabetical order. [1] [2]
- Decreased or absent urine output
- Confusion
- Decreased alertness
- Dry mouth
- Fatigue
- Orthostatic blood pressure (rises or falls, significantly depending on position)
- Pale skin color
- Rapid pulse
- Thirst, swelling (edema, anasarca)
A urinalysis will typically show a decreased urine sodium level, a high urine creatinine-to- serum creatinine ratio, a high urine urea-to-serum urea ratio, and concentrated urine (determined by osmolality and specific gravity). None of these is particularly useful in diagnosis.
Prompt treatment of some causes of azotemia can result in restoration of kidney function; delayed treatment may result in permanent loss of renal function. Treatment may include hemodialysis or peritoneal dialysis, medications to increase cardiac output and increase blood pressure, and the treatment of the condition that caused the azotemia to begin with.
Complete Differential Diagnosis of the Causes of Azotemia
(In alphabetical order)
- Chronic kidney disease
- Chronic renal failure
- Congestive heart failure
- Crescentic glomerulonephritis
- Liver failure
- Multiple organ dysfunction syndrome
- Nephritic syndrome
- Nephrotic syndrome
- Pentamidine
- Post-streptococcal glomerulonephritis
- Prolonged vomiting or diarrhea
- Rapidly progressing glomerulonephritis
- Renovascular Disease
- Scleroderma
- Severe burns
- Shock
- Trauma to the kidneys
See also
References
- ↑ Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:77 ISBN 1591032016
- ↑ Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:68 ISBN 140510368X
Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
