A comparison of transcranial Doppler with near infrared spectroscopy and indocyanine green during hemorrhagic shock: a prospective experimental study

Critical Care : the Official Journal of the Critical Care Forum
Berthold BeinVolker Doerges

Abstract

The present study was designed to compare cerebral hemodynamics assessed using the blood flow index (BFI) derived from the kinetics of the tracer dye indocyanine green (ICG) with transcranial Doppler ultrasound (TCD) in an established model of hemorrhagic shock. After approval from the Animal Investigational Committee, 20 healthy pigs underwent a simulated penetrating liver trauma. Following hemodynamic decompensation, all animals received a hypertonic-isooncotic hydroxyethyl starch solution and either arginine vasopressin or norepinephrine, and bleeding was subsequently controlled. ICG passage through the brain was monitored by near infrared spectroscopy. BFI was calculated by dividing maximal ICG absorption change by rise time. Mean blood flow velocity (FVmean) of the right middle cerebral artery was recorded by TCD. FVmean and BFI were assessed at baseline (BL), at hemodynamic decompensation, and repeatedly after control of bleeding. At hemodynamic decompensation, cerebral perfusion pressure (CPP), FVmean and BFI dropped compared to BL (mean +/- standard deviation; CPP 16 +/- 5 mmHg versus 70 +/- 16 mmHg; FVmean 4 +/- 5 cm x s(-1) versus 28 +/- 9 cm x s(-1); BFI 0.008 +/- 0.004 versus 0.02 +/- 0.006; p < 0.001). After pharma...Continue Reading

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Citations

Dec 17, 2009·Diseases of the Colon and Rectum·Lisanne A E PosmaRobert P Bleichrodt
Nov 19, 2008·The Journal of Physiology·Thomas S SeifertHenning B Nielsen
Feb 4, 2011·American Journal of Physiology. Regulatory, Integrative and Comparative Physiology·Jordan A GuenetteA William Sheel
Jun 30, 2009·Prehospital and Disaster Medicine·Hossein GhalenouiMahmoudreza Khalatbari

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Methods Mentioned

BETA
infrared spectroscopy

Software Mentioned

GraphPad Prism
GraphPad
Vigilance

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