A case of severe metformin-associated lactic acidosis treated with CVVHDF and regional anticoagulation with sodium citrate

Abstract

Metformin is an antidiabetic drug; used to treat type II diabetes mellitus, metformin associated lactic acidosis has an incidence of 2-9 cases / 100,000 patients / year with high mortality (30%). We have had the case of a 75-year-old woman with metabolic acidosis as a result of metformin assumption, treated by renal replacement therapy (CRRT) with continuous veno-venous hemodiafiltration (CVVHDF). Results: after a short treatment period there was a reduction in Lactates (from 16.8 mmol/L to 12.6 mmol/L) and a progressive improvement of acidosis. In 72 hours the recovery of diuresis and subsequent suspension of CRRT was achieved. Conclusion: CRRT, in addition to ensuring support for renal failure and volume correction, allowed a rapid recovery from metformin-associated lactic acidosis.

Keywords: metformin, lactic acidosis, CRRT, CVVHDF.

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Introduzione

La metformina è un farmaco antidiabetico orale, utilizzato per il trattamento del diabete mellito tipo II, l’acidosi lattica associata alla metformina presenta un’incidenza pari a 2-9 casi/100000 pazienti/anno con un’elevata mortalità (30%) (1).

Abbiamo avuto il caso di una donna di 75 anni con acidosi metabolica associata all’assunzione di metformina.

Presentava, in anamnesi, un diabete iatrogeno per l’assunzione di metilprednisolone come terapia per la sua broncopneumopatia cronica ostruttiva (BPCO) e successiva terapia con il suddetto antidiabetico orale alla dose di 1800mg/die, suddivisi in tre somministrazioni (500/800/500). Da una settimana sindrome influenzale con un episodio di diarrea, disidratazione ed ipoalimentazione, progressiva dispnea.

 

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Metformin and Diabetes: still has a sense of its use in paz. CKD stage II or is an additional risk factor?

Abstract

Pz woman of 62 years comes to P.S.G. for fatigue, low-grade fever, diuresis present. A history of hypertension refers to therapy for about five years, diabetes mellitus for about two years in therapy with Metformin 1gr x 3 gg / day.  Blood tests: BUN 195 mg / dL, creatinine 8.0 mg / dl, Ph 6877, HCO3 5.1 mmol / L BE -29.1 mmol / l. Rapid clinical deterioration with occurrence of arterial hypotension – 85/60 mmHg, stupor. Start therapy Bicarbonates ev, is positioned in Urgency CVC and it undergoes AFB with infusion of bicarbonates 2000 ml / h for 4 hours, blood flow rate 250 ml / min., the hemodynamics has been supported with dopamine infusion 200 mg: 2 vials in 250 cc of physiological vel 30 – 40 ml / h, The pc after undergoing three AFB, interrupted the dialysis for resumption of diuresis spontaneous and progressive improvement of renal function and blood pressure. Monitored, after discharge, the parameters of renal function decreased to within normal limits, clearance compatible with IRC II – III stage.

Conclusions: dehydration, fever, IRC II stadium, undiagnosed caused, in a very short time, an accumulation of metformin, which has been the cause of metabolic acidosis. The pc. saved thanks to the positioning of the CVC and to the AFB in the treatment with the infusion of large quantities of Bicarbonates e.v.

The use of metformin in pcs. > 50 years and / or creatinine clearance <60 ml / min., Must be subordinated to the preliminary study and periodic renal function.

 

Keywords: Metformin, Diabetes, IRA, metabolic acidosis

Sorry, this entry is only available in Italian. For the sake of viewer convenience, the content is shown below in the alternative language. You may click the link to switch the active language.

Paziente di sesso femminile di 62 anni giunge al P.S.G. per astenia, malessere generale e riferita febbricola, in anamnesi riferisce ipertensione arteriosa in terapia antipertensiva da circa 5 anni, diabete mellito non insulino dipendente da circa 2 anni in terapia con Metformina 1 gr x 3/die. 

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