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Related Experiment Videos

Glycine loading and urinary oxalate excretion

R G Hahn1, M Sikk

  • 1Department of Anaesthesiology, Huddinge University Hospital, Sweden.

Urologia Internationalis
|January 1, 1994
PubMed
Summary

Intravenous glycine infusion did not increase urinary oxalate, calcium, or citrate levels. This study found no biochemical evidence suggesting glycine irrigation during transurethral operations increases the risk of kidney stones.

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Area of Science:

  • Nephrology
  • Biochemistry
  • Urology

Background:

  • Glycine metabolism can produce oxalate, a precursor to calcium oxalate stones.
  • Transurethral operations may involve glycine absorption, raising concerns about kidney stone formation.

Purpose of the Study:

  • To investigate the biochemical impact of glycine absorption on urinary stone risk factors.
  • To determine if glycine infusion promotes calcium oxalate precipitation.

Main Methods:

  • Collected 24-hour urine samples from 10 male volunteers before and after intravenous glycine infusion (22 g).
  • Analyzed urine for oxalate, calcium, citrate, potassium, volume, and amino acid excretion.

Main Results:

  • No significant changes were observed in urinary oxalate, calcium, or citrate excretion.
  • Urine volume and amino acid excretion increased post-infusion.
  • Urinary potassium levels decreased after glycine infusion.

Conclusions:

  • The study found no biochemical evidence to support an increased risk of renal lithiasis (kidney stones) from glycine irrigation during transurethral operations.
  • Glycine infusion did not alter key urinary markers associated with calcium oxalate stone formation.

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