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Updated: May 21, 2026

Long-Term Continuous Measurement of Renal Blood Flow in Conscious Rats
Published on: February 8, 2022
[Metformin-associated lactic acidosis can be treated with continuous renal replacement therapy]
Helene Korvenius Jørgensen1, Jane Stab Nielsen, Torben Gilsaa
1Anæstesiologisk Afdeling, Kolding Sygehus, Skovvangen 2-8, 6000 Kolding, Denmark. helene_j@yahoo.com
Metformin can cause lactic acidosis, especially with dehydration. Continuous renal replacement therapy (CRRT) effectively removes lactate and metformin, improving outcomes in these rare but serious cases.
Area of Science:
- Nephrology
- Endocrinology
- Critical Care Medicine
Background:
- Metformin is a first-line treatment for type 2 diabetes.
- Metformin-associated lactic acidosis (MALA) is a rare but serious complication.
- Dehydration is a known risk factor for MALA.
Observation:
- Two cases of MALA are presented.
- Patients exhibited metabolic acidosis, hypotension, renal failure, and gastrointestinal symptoms.
- Continuous renal replacement therapy (CRRT) was initiated.
Findings:
- CRRT demonstrated significant efficacy in managing MALA.
- Hemofiltration effectively cleared lactate and metformin from the bloodstream.
- CRRT is an accessible treatment option in intensive care units.
Implications:
- CRRT offers a viable treatment strategy for MALA.
- Prompt recognition and intervention are crucial due to MALA's high mortality rate (approximately 30%).
- This highlights the importance of monitoring renal function and hydration status in patients on metformin.
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