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Total-to-ionized calcium ratio predicts mortality in continuous renal replacement therapy with citrate anticoagulation in critically ill patients

Overview of attention for article published in Critical Care, May 2012
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Title
Total-to-ionized calcium ratio predicts mortality in continuous renal replacement therapy with citrate anticoagulation in critically ill patients
Published in
Critical Care, May 2012
DOI 10.1186/cc11363
Pubmed ID
Authors

Andreas Link, Matthias Klingele, Timo Speer, Ranja Rbah, Janine Pöss, Anne Lerner-Gräber, Danilo Fliser, Michael Böhm

Abstract

ABSTRACT: INTRODUCTION: Regional citrate anticoagulation is safe, feasible and increasingly used in critically ill patients on continuous renal replacement therapy (CRRT). However, in patients with hepatic or multi-organ dysfunction, citrate accumulation may lead to an imbalance of calcium homeostasis. The study aimed at evaluating the incidence and prognostic relevance of an increased total to ionized calcium ratio (T/I Ca2+ ratio) and its association to hepatic dysfunction. METHODS: We performed a prospective observational study on n = 208 critically ill patients with acute kidney injury (AKI) and necessity for CRRT with regional citrate anticoagulation (CRRT-citrate) between September 2009 and September 2011. Critical illness was estimated by Simplified Acute Physiology Score II; hepatic function was measured with indocyanine green plasma disappearance rate. After achieving a steady state of calcium homeostasis patients were classified into tertiles according to the T/I Ca2+ ratio (<2.0 versus 2.0 - 2.39 versus ≥2.4). RESULTS: The T/I Ca2+ ratio was determined as an independent predictor for 28-day mortality in critically ill patients with AKI on CRRT-citrate confirmed by receiver operating characteristics and multivariate analysis (Area under the curve 0.94 ± 0.02; p<0.001). A T/I Ca2+ ratio ≥2.4 independently predicted a 33.5-fold (p<0.001) increase in 28-day mortality-rate. There was a significant correlation between the T/I Ca2+ ratio and the hepatic clearance (p<0.001) and the severity of critical illness (p<0.001). The efficacy and safety of citrate anticoagulation, determined by blood urea nitrogen, mean filter patency and bleeding episodes, were not significantly different between the tertiles. CONCLUSIONS: In patients on CRRT-citrate T/I Ca2+ ratio is closely related to the clinical outcome and emerged as an independent predictor of 28-day mortality. Larger studies are required to define the cut-off and predictive value for the T/I Ca2+ ratio. This ratio is associated with hepatic and/or multi-organ dysfunction and therefore an important therapeutic target.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 76 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Brazil 2 3%
France 2 3%
Colombia 1 1%
Switzerland 1 1%
Italy 1 1%
Spain 1 1%
Unknown 68 89%

Demographic breakdown

Readers by professional status Count As %
Researcher 16 21%
Other 15 20%
Student > Postgraduate 9 12%
Student > Master 7 9%
Student > Bachelor 6 8%
Other 16 21%
Unknown 7 9%
Readers by discipline Count As %
Medicine and Dentistry 54 71%
Nursing and Health Professions 5 7%
Agricultural and Biological Sciences 2 3%
Pharmacology, Toxicology and Pharmaceutical Science 1 1%
Psychology 1 1%
Other 3 4%
Unknown 10 13%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 29 May 2012.
All research outputs
#19,944,091
of 25,373,627 outputs
Outputs from Critical Care
#5,876
of 6,554 outputs
Outputs of similar age
#134,965
of 178,782 outputs
Outputs of similar age from Critical Care
#83
of 113 outputs
Altmetric has tracked 25,373,627 research outputs across all sources so far. This one is in the 18th percentile – i.e., 18% of other outputs scored the same or lower than it.
So far Altmetric has tracked 6,554 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 20.8. This one is in the 8th percentile – i.e., 8% of its peers scored the same or lower than it.
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We're also able to compare this research output to 113 others from the same source and published within six weeks on either side of this one. This one is in the 25th percentile – i.e., 25% of its contemporaries scored the same or lower than it.