Quantitative estimation of urinary protein excretion by refractometry

Area of Science:

• Clinical Chemistry
• Urology

Background:

• Proteinuria is a key indicator of kidney disease.
• Accurate quantification of urinary protein is essential for diagnosis and monitoring.
• Current methods may be complex or costly for routine outpatient use.

Purpose of the Study:

• To evaluate the refractometric method for quantitative proteinuria estimation.
• To compare its accuracy against established sulphosalycilic acid and biuret methods.
• To determine the suitability of refractometry for point-of-care testing in outpatient settings.

Main Methods:

• Quantitative proteinuria was measured in 102 urine samples using refractometry.
• Results were compared with those obtained from sulphosalycilic acid and biuret methods.
• Statistical analysis using Student's t-test was performed to assess differences.

Main Results:

• No statistically significant differences were observed between the refractometric method and the sulphosalycilic acid or biuret methods.
• The refractometric method demonstrated high reliability in quantitative protein estimation.
• The refractometer is a portable, pocket-sized instrument.

Conclusions:

• The refractometric method is a simple, cost-effective, and reliable technique for quantifying urinary protein excretion.
• Its ease of use and portability make it ideal for outpatient clinics.
• Refractometry provides a viable alternative for routine proteinuria assessment.