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Erschienen in: Intensive Care Medicine 11/2012

01.11.2012 | Original

Red blood cell transfusion affects microdialysis-assessed interstitial lactate/pyruvate ratio in critically ill patients with late sepsis

verfasst von: Petros Kopterides, Maria Theodorakopoulou, Nikitas Nikitas, Ioannis Ilias, Dimitra Argiro Vassiliadi, Stylianos E. Orfanos, Iraklis Tsangaris, Nikolaos A. Maniatis, Argirios E. Tsantes, Anthi Travlou, George Dimitriadis, Apostolos Armaganidis, Urban Ungerstedt, Ioanna Dimopoulou

Erschienen in: Intensive Care Medicine | Ausgabe 11/2012

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Abstract

Purpose

The aim of this study was to explore the effect of red blood cell (RBC) transfusion on microdialysis-assessed interstitial fluid metabolic parameters in septic patients.

Methods

We conducted a retrospective study of 37 patients with severe sepsis/septic shock requiring transfusion of one to two RBC units. Interstitial fluid metabolic alterations were monitored by a microdialysis catheter inserted in the subcutaneous adipose tissue. Samples were collected before (T0) and after transfusion at two time-points: T1a and T1b; median post-transfusion times of 120 [interquartile range (IQR); 45–180] and 360 (IQR; 285–320) min. Lactate, pyruvate, glycerol and glucose concentrations were measured with a bedside analyzer, and the lactate/pyruvate (LP) ratio was calculated automatically.

Results

RBC transfusions decreased the LP ratio from (T0) 18.80 [interquartile range (IQR); 14.85–27.45] to (T1a) 17.80 (IQR; 14.35–25.20; P < 0.05) and (T1b) 17.90 (IQR; 14.45–22.75; P < 0.001), while there was also significant interindividual variation. Post-transfusion LP ratio changes at T1a [r = −0.42; 95 % confidence interval (CI), −0.66 to −0.098; P = 0.01] and T1b (r = −0.68; 95 % [CI], −0.82 to −0.44; P < 0.001) were significantly correlated with the pre-transfusion LP ratio, but not with baseline demographic characteristics, vital signs, severity scores, hemoglobin level and blood lactate. RBC storage time and leukocyte reduction had no influence on the tissue metabolic response to transfusion.

Conclusions

Tissue oxygenation is affected by RBC transfusion in critically ill septic patients. Monitoring of tissue LP ratio by microdialysis may represent a useful method for individual clinical management.
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Metadaten
Titel
Red blood cell transfusion affects microdialysis-assessed interstitial lactate/pyruvate ratio in critically ill patients with late sepsis
verfasst von
Petros Kopterides
Maria Theodorakopoulou
Nikitas Nikitas
Ioannis Ilias
Dimitra Argiro Vassiliadi
Stylianos E. Orfanos
Iraklis Tsangaris
Nikolaos A. Maniatis
Argirios E. Tsantes
Anthi Travlou
George Dimitriadis
Apostolos Armaganidis
Urban Ungerstedt
Ioanna Dimopoulou
Publikationsdatum
01.11.2012
Verlag
Springer-Verlag
Erschienen in
Intensive Care Medicine / Ausgabe 11/2012
Print ISSN: 0342-4642
Elektronische ISSN: 1432-1238
DOI
https://doi.org/10.1007/s00134-012-2635-8

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