Methods to preservation of urine specimens- biochemistry notes for DMLT

 Five methods for preserving urine specimens, including their advantages and disadvantages.

• Preservation of specimen:

  • Urine is preserved in various methods like refrigeration and adding preservatives.

  • Preserving a specimen is significant for urine analysis.

  Methods to preserve urine specimens:

  • Refrigeration

  • Boric acid

  • Formalin (formaldehyde)

  • Sodium fluoride

  • Commercial preservative tablets

  Refrigeration:

  • It is the process of freezing or keeping the specimen in low temperatures to prevent pathogenic growth.

  • For 24 hours it prevents bacterial growth.

  Advantages:

  • Interference with chemical test does not occur.

  Disadvantages:

  • Refrigerated specimen forms amorphous phosphates and urates precipitation.
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• Ismail Tahasildar