Initial clinical experience with the Quantra QStat System in adult trauma patients.

Autor:	Michelson EA; Texas Tech University Health Sciences Center El Paso, El Paso, Texas, USA., Cripps MW; University of Texas Southwestern Medical Center at Dallas, Dallas, Texas, USA., Ray B; University Medical Center of El Paso, El Paso, Texas, USA., Winegar DA; HemoSonics LLC, Charlottesville, Virginia, USA., Viola F; HemoSonics LLC, Charlottesville, Virginia, USA.
Jazyk:	angličtina
Zdroj:	Trauma surgery & acute care open [Trauma Surg Acute Care Open] 2020 Nov 03; Vol. 5 (1), pp. e000581. Date of Electronic Publication: 2020 Nov 03 (Print Publication: 2020).
DOI:	10.1136/tsaco-2020-000581
Abstrakt:	Background: Whole blood viscoelastic testing (VET) devices are routinely used in a variety of clinical settings to assess hemostasis. The Quantra QStat System is a cartridge-based point of care VET device that measures changes in clot stiffness during coagulation and fibrinolysis using ultrasound detection of resonance. The objective of this study was to assess the ability of the Quantra QStat System to detect coagulopathies in trauma patients. Methods: A multicenter observational study was conducted on adult subjects at two level 1 trauma centers. For each subject, whole blood samples were drawn upon arrival to the emergency department and again, in some cases, after administration of blood products and/or antifibrinolytics. Samples were analyzed on the Quantra in parallel to ROTEM delta . The QStat cartridge provides measures of Clot Time (CT), Clot Stiffness (CS), Fibrinogen and Platelet Contributions to clot stiffness (FCS and PCS), and Clot Stability to Lysis (CSL). Data analyses included linear regression of Quantra and ROTEM parameters and an assessment of the concordance of the two devices for the assessment of hyperfibrinolysis. Results: A total of 56 patients were analyzed. 42% of samples had a low QStat CS value suggestive of an hypocoagulable state. The low stiffness values could be attributed to either low PCS, FCS or combination. Additionally, 13% of samples showed evidence of hyperfibrinolysis based on the QStat CSL parameter. Samples analyzed with ROTEM assays showed a lower prevalence of low CS and hyperfibrinolysis based on EXTEM and FIBTEM results. The correlation of CS, FCS and CT versus equivalent ROTEM parameters was strong with r-values of 0.83, 0.79 and 0.79, respectively. Discussion: This first clinical experience with the Quantra in trauma patients showed that the QStat Cartridge was strongly correlated with ROTEM parameters and that it could detect coagulopathies associated with critical bleeding. Level of Evidence: Diagnostic test, Level II. Competing Interests: Competing interests: DAW and FV are employees of HemoSonics, LLC, a medical device company that is commercializing the Quantra QStat System. (© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.)
Databáze:	MEDLINE
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