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Related Experiment Videos

Urea determination in dialysis, based on a differential pH technique.

D Bonucchi1, A Castellani, G C Orlandini

  • 1Servizio di Nefrologia e Dialisi, Ospedale dei Bambini Umberto I, Brescia, Italy.

The International Journal of Artificial Organs
|November 1, 1987
PubMed
Summary

A new pH measurement technique accurately determines urea concentration in dialysis patients. This simple, rapid method using urease is ideal for clinical settings, correlating well with existing methods.

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Area of Science:

  • Clinical Chemistry
  • Biomedical Engineering

Background:

  • Urea concentration is a critical biomarker in patients undergoing dialysis.
  • Accurate and efficient urea measurement is essential for effective patient management.

Purpose of the Study:

  • To introduce and validate a novel technique for determining urea concentration.
  • To assess the applicability of this new method in a clinical dialysis setting.

Main Methods:

  • A new technique based on differential pH measurements was developed.
  • Urea was measured enzymatically using urease in plasma, whole blood, or dialysis fluids.
  • The method requires a small sample volume (10 microL).

Main Results:

  • The technique demonstrated simplicity and speed.

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  • Excellent correlation (r = 0.9991) was observed with a reference spectrophotometric method.
  • The method is effective within the 0-300 mg/dL urea concentration range.

    • Conclusions:

    • The novel pH-based differential measurement technique offers a reliable method for urea determination.
    • This technique is suitable for routine use in dialysis centers due to its efficiency and accuracy.