Can we rely on out-of-hospital blood samples? A prospective interventional study on the pre-analytical stability of blood samples under prehospital emergency medicine conditions

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autor(en): Prottengeier J, Jess N, Harig F, Gall C, Schmidt J, Birkholz T
Zeitschrift: Scandinavian Journal of Trauma Resuscitation & Emergency Medicine
Jahr der Veröffentlichung: 2017
Band: 25
Heftnummer: 1
ISSN: 1757-7241


Abstract

BACKGROUND: Prehospital intravenous access provides the opportunity to sample blood from an emergency patient at the earliest possible moment in the course of acute illness and in a state prior to therapeutic interventions. Our study investigates the pre-analytical stability of biomarkers in prehospital emergency medicine and will answer the question whether an approach of blood sampling out in the field will deliver valid laboratory results.
METHODS: We prepared pairs of blood samples from healthy volunteers and volunteering patients post cardio-thoracic surgery. While one sample set was analysed immediately, the other one was subjected to a worse-than-reality treatment of 60 min time-lapse and standardized mechanical forces outside of the hospital through actual ambulance transport. We investigated 21 parameters comprising blood cells, coagulation tests, electrolytes, markers of haemolysis and markers of cardiac ischemia. Bland-Altman analysis was used to investigate differences between test groups. Differences between test groups were set against the official margins of test accuracy as given by the German Requirements for Quality Assurance of Medical Laboratory Examinations.
RESULTS: Agreement between immediate analysis and our prehospital treatment is high as demonstrated by Bland-Altman plotting. Mechanical stress and time delay do not produce a systematic bias but only random inaccuracy. The limits of agreement for the tested parameters are generally within clinically acceptable ranges of variation and within the official margins as set by the German Requirements for Quality Assurance of Medical Laboratory Examinations.
DISCUSSION: We subjected blood samples to a standardized treatment marking a worse-than-reality scenario of prehospital time delay and transport. Biomarkers including indicators of myocardial ischemia showed high pre-analytical stability.
CONCLUSION: We conclude the validity of blood samples from a prehospital environment.


FAU-Autoren / FAU-Herausgeber

Birkholz, Torsten Dr.
Anästhesiologische Klinik
Gall, Christine Dr.
Lehrstuhl für Biometrie und Epidemiologie
Harig, Frank PD Dr.
Herzchirurgische Klinik
Prottengeier, Johannes PD Dr.
Anästhesiologische Klinik
Schmidt, Joachim Prof. Dr.
Medizinische Fakultät


Autor(en) der externen Einrichtung(en)
Ludwig-Maximilians-Universität (LMU)


Zitierweisen

APA:
Prottengeier, J., Jess, N., Harig, F., Gall, C., Schmidt, J., & Birkholz, T. (2017). Can we rely on out-of-hospital blood samples? A prospective interventional study on the pre-analytical stability of blood samples under prehospital emergency medicine conditions. Scandinavian Journal of Trauma Resuscitation & Emergency Medicine, 25(1). https://dx.doi.org/10.1186/s13049-017-0371-3

MLA:
Prottengeier, Johannes, et al. "Can we rely on out-of-hospital blood samples? A prospective interventional study on the pre-analytical stability of blood samples under prehospital emergency medicine conditions." Scandinavian Journal of Trauma Resuscitation & Emergency Medicine 25.1 (2017).

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Zuletzt aktualisiert 2018-11-10 um 21:08