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Related Experiment Videos

Abnormal urine color: differential diagnosis.

J R Raymond1, W E Yarger

  • 1Department of Medicine, Duke University Medical Center, Durham, NC 27710.

Southern Medical Journal
|July 1, 1988
PubMed
Summary

Abnormal urine color can signal various conditions, from benign to serious. A systematic approach using patient history and simple lab tests helps diagnose the cause efficiently.

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Area of Science:

  • Clinical Chemistry
  • Urology
  • Diagnostic Medicine

Background:

  • Urine color variations can cause patient and physician concern.
  • Abnormal urine hues may signify diverse physiological or pathological states.
  • Factors influencing urine color include concentration, pH, diet, and metabolic issues.

Purpose of the Study:

  • To present a structured diagnostic algorithm for abnormal urine color.
  • To guide clinicians in the logical and efficient evaluation of urine discoloration.
  • To provide an inexpensive method for identifying the causes of altered urine appearance.

Main Methods:

  • Initial assessment involves a detailed patient history, focusing on medications, diet, occupation, and family history.
  • Gross visual inspection of urine is the first diagnostic step.
  • Laboratory tests include specific gravity, pH, dipstick urinalysis, and microscopic examination.

Main Results:

  • Abnormal urine colors have a defined differential diagnosis.
  • Specific gravity and pH measurements help narrow diagnostic possibilities.
  • Ferric chloride testing and ultraviolet light examination further refine differential diagnoses.

Conclusions:

  • A systematic evaluation, starting with history and gross examination, is effective.
  • Simple laboratory tests significantly aid in diagnosing abnormal urine color.
  • The proposed algorithm offers a logical, cost-effective approach to urine discoloration assessment.

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