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Normal citratemia and metabolic tolerance of citrate anticoagulation for hemodiafiltration in severe septic shock burn patients

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Abstract

Purpose

Anticoagulation during renal replacement therapy remains an important challenge for burn patients due to their high risk of bleeding. In this study we compared the efficacy and safety of citrate anticoagulation to heparin anticoagulation for hemodiafiltration (HDF) in severe burn patients, focusing on metabolic tolerance and handling of citrate.

Methods

Retrospective observational study (January 2000–December 2007) at a university teaching hospital. Among 548 patients admitted with burns, 70 severe burn septic shock patients (median age 57.5 years, interquartile range 42–76 years; median burned surface area 40%, interquartile range 30–60%) who underwent HDF for more than 24 h were included.

Results

Of the 70 HDF patients, 31 at high risk of bleeding were treated with citrate and 39 with heparin, with a mortality rate of 70.9 and 71.8%, respectively. In continuous venovenous hemodiafiltration (CVVHDF), the filter survival was higher with citrate, and hemorrhagic complications were lower (0.035 vs. 0.145 episodes/day, respectively). During citrate CVVHDF [median delivered dialysis dose: 578.9 ml kg−1 day−1 (461.5–769.2 ml kg−1 day−1)] in catecholamine-supported patients (norepinephrine 0.53 μg kg−1 min−1), no metabolic derangements in pH, bicarbonates, Na+, K+, Ca++, and ionized calcium were observed. Systemic citratemia was within the normal range (<0.4 mmol/l) and was associated with a marked citrate removal in the effluent (5 patients, 36–60% of infused amount).

Conclusions

In septic shock burn patients, citrate for CVVHDF was efficient and safe, and superior to heparin for hemorrhagic complications and filter survival. Observed metabolic stability was most likely due to a marked loss of citrate in effluent volume and subsequent low total citrate load for the patient.

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Authors and Affiliations

  1. Nephrology and Dialysis Unit, Department of Medicine Area, CTO Hospital, Via G. Zuretti 29, 10126, Turin, Italy

    Filippo Mariano & Giorgio Triolo

  2. Intensive Care Unit, Department of Emergency and Intensive Care, CTO Hospital, Turin, Italy

    Luisa Tedeschi

  3. Clinical Pathology Unit, Department of Medicine Area, CTO Hospital, Turin, Italy

    Maurizio Morselli

  4. Burns Unit, Department of Plastic Surgery, CTO Hospital, Turin, Italy

    Maurizio Stella

Authors
  1. Filippo Mariano
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  2. Luisa Tedeschi
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  3. Maurizio Morselli
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  4. Maurizio Stella
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  5. Giorgio Triolo
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Correspondence to Filippo Mariano.

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Mariano, F., Tedeschi, L., Morselli, M. et al. Normal citratemia and metabolic tolerance of citrate anticoagulation for hemodiafiltration in severe septic shock burn patients. Intensive Care Med 36, 1735–1743 (2010). https://doi.org/10.1007/s00134-010-1909-2

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  • DOI: https://doi.org/10.1007/s00134-010-1909-2

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