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[The red urine]
1Klinik für Nephrologie, Universitätsspital Zürich. rudolf.wuethrich@usz.ch
Therapeutische Umschau. Revue Therapeutique
|October 19, 2006
Summary
Red urine, often due to hematuria (blood in urine), requires careful diagnosis. This article details the causes and diagnostic steps for red urine, distinguishing between macrohematuria and microhematuria.
Area of Science:
- Nephrology
- Urology
Context:
- Red urine is a common clinical sign prompting patient concern.
- Hematuria, the presence of blood in urine, is the primary cause of red urine.
- Distinguishing between macrohematuria (visible blood) and microhematuria (microscopic blood) is crucial.
Purpose:
- To outline the differential diagnosis for red urine.
- To detail the diagnostic workup for hematuria.
- To differentiate between renal and extrarenal causes of red urine.
Summary:
- Hematuria, the most frequent cause of red urine, can stem from various renal diseases like glomerulonephritis (e.g., IgA nephropathy, Alport's syndrome) or extrarenal conditions such as kidney stones, tumors, and urinary tract infections.
- Non-hematuric causes, including certain foods and medications, can also impart a red color to urine.
- Diagnostic evaluation involves urinalysis with microscopic sediment examination, renal ultrasound, and other radiological imaging to identify the underlying cause.
Impact:
- Provides a structured approach to diagnosing the cause of red urine.
- Aids clinicians in differentiating between benign and serious underlying conditions.
- Facilitates timely and accurate diagnosis of hematuria, improving patient outcomes.
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