ABSTRACT 599

Abstract

Background and aims: The TCD is a tool for monitoring, diagnosis and screening used in intensive care unit. Two types of devices are available: TCD and color TCD that has the advantage of allowing full visibility of the arteries of the circle of Willis. Aims: To compare the values??obtained in color EDTC and those of classical DTC. Methods: Prospective, observational study in the framework of a research project of the Health No. 172 (NRP) including all children TBI. The brain artery witch was studied is a middle cerebral artery (MCA). Each examination procedure included at least 8 measurements per patient. Systolic velocity (sV), diastolic (dV), mean (mV) and pulsatility index (PI) were studied. Results: Thirty-eight children were included and 194 examinations were made. Velocities and indexes obtained by TCD and color TCD were highly correlated (r > 0.68 for velocity and r > 0.84 for IP, p <0.0001). There was no significant difference between the velocities in TCD and color TCD. The Bland and Altman Graphics showed a satisfactory agreement between the TCD and the Color TCD. Conclusions: A methodological bias between the two techniques related to the angle of insonation may exist especially in the absence of angle correction. TCD, use the correction angle as small as possible in order to obtain reliable and comparable to those obtained by TCD velocities.