DIAGNOSTIC TECHNIQUE FOR FUNCTIONAL VALUE OF INTERNAL CAROTID ARTERY Russian patent published in 2014 - IPC A61B8/06 A61B5/21 

FIELD: medicine.

SUBSTANCE: invention refers to endovascular neurosurgery, and can be used for diagnosing a functional value of the internal carotid artery (ICA) in the patients with giant aneurysm of the internal carotid artery (ICA), mixed carotid-cavernous fistulas, tumours of neck and base of skull with the ICA involved into the tumour process. A cerebral blood auto-regulation (CBAR) velocity in an ipsilateral medial cerebral artery (MCA) is assessed before and after finger compression of the ICA on the neck. The CBAR is assessed by continuous recording of a linear blood flow rate (LBFR) and a system blood pressure (SBP) for at least 4 minutes. A cross-spectral analysis of the above time sequence is used to calculate a phase shift between spontaneous oscillations of LBFR and SBP in the ipsilateral MCA within the M-wave range before and against the time finger compression of the ICA. If observing a phase shift by more than 50% as compared to the reference before the ICA compression, the high functional value of the ICA is diagnosed.

EFFECT: higher information value of the diagnosis of the postoperative functional value of the ICA by the quantitative evaluation of the CBAR velocity in the ipsilateral MCA.

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