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Published in: Trials 1/2016

Open Access 01-12-2016 | Study protocol

Targeted tissue perfusion versus macrocirculation-guided standard care in patients with septic shock (TARTARE-2S): study protocol and statistical analysis plan for a randomized controlled trial

Authors: Ville Pettilä, Tobias Merz, Erika Wilkman, Anders Perner, Sari Karlsson, Theis Lange, Johanna Hästbacka, Peter Buhl Hjortrup, Anne Kuitunen, Stephan M. Jakob, Jukka Takala

Published in: Trials | Issue 1/2016

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Abstract

Background

Septic shock has a 90-day mortality risk of up to 50 %. The hemodynamic targets, including mean arterial pressure (MAP) are not based on robust clinical data. Both severe hypotension and high doses of vasopressors may be harmful. Hence, re-evaluation of hemodynamic targets in septic shock is relevant.

Methods/design

The targeted tissue perfusion versus macrocirculation-guided standard care in patients with septic shock (TARTARE-2S) trial is a prospective, two-parallel-group, randomized, open-label, multicenter trial with assessor-blinded outcome evaluation. We will randomize at least 200 patients with septic shock in four European intensive care units (ICUs) to test whether a tissue perfusion-guided treatment strategy based on capillary refill time, peripheral temperature, arterial lactate concentrations, and accepting lower MAP levels, leads to a faster resolution of shock than macrocirculation target-guided standard care.
The primary outcome measure is days alive in 30 days with normal arterial blood lactate (first value of <2 mmol/L) and without any inotropic or vasopressor agent. Secondary outcomes include individual components of the primary outcome, days alive without renal replacement, days alive without mechanical ventilation in 30 days, and new acute kidney injury. The sample size enables detection of a 13.5-h difference in the primary outcome with a type 1 error of 5 % and power of 80 %, assuming 25 % mortality and a mean of 650 h (SD 30) among the 30-day survivors. After 150 included patients the statistician masked for allocation group will recalculate the sample size potentially increasing the sample up to 300. The Data Safety and Monitoring Board (DSMB) will review the safety data after 100 patients.

Discussion

The TARTARE-2S trial will provide important clinical data on treatment targets in septic shock, evaluating the impact of clinical tissue perfusion-guided hemodynamic treatment on a surrogate outcome combining resolution of shock (hyperlactatemia and vasopressors/inotropes), and 30-day mortality.

Trial registration

ClinicalTrials.gov: NCT02579525. Registered on 19 October 2015.
Appendix
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Metadata
Title
Targeted tissue perfusion versus macrocirculation-guided standard care in patients with septic shock (TARTARE-2S): study protocol and statistical analysis plan for a randomized controlled trial
Authors
Ville Pettilä
Tobias Merz
Erika Wilkman
Anders Perner
Sari Karlsson
Theis Lange
Johanna Hästbacka
Peter Buhl Hjortrup
Anne Kuitunen
Stephan M. Jakob
Jukka Takala
Publication date
01-12-2016
Publisher
BioMed Central
Published in
Trials / Issue 1/2016
Electronic ISSN: 1745-6215
DOI
https://doi.org/10.1186/s13063-016-1515-x

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