METHOD FOR ULTRASONIC DIAGNOSIS OF TRANSIENT EXTRAVASCULAR COMPRESSION OF THE VERTEBRAL ARTERY AT THE LEVEL C0-C6 Russian patent published in 2020 - IPC A61B8/00 

Abstract RU 2711112 C1

FIELD: medicine.

SUBSTANCE: invention refers to medicine, namely neurology, and can be used for ultrasonic diagnosis of transient extravasal compression of vertebral artery (VA) in a channel of transverse processes at the level of vertebral motor segments (VMS) C0–C6. Dopplerometric of blood flow in VA in the third segment of 2 or 4 MHz pancreatic sensor of suboccipital approach in a patient's position on the back with a neutral head position is performed. That is combined with recording a time-average bloodstream linear velocity (BLV) for each VA in rest (VTAV-0). Then samples are taken: 1) three consecutive head movements to the right and to the left with neutral position of neck; 2) three consecutive head movements to the right and to the left with fixed extension of neck; 3) three consecutive head movements to the right and to the left with fixed neck bending; 4) three consecutive head-to-back movements. After each sample, both PA are insonified in the initial position and a time-averaged BLV is recorded in each VA during the second-third cardiac cycles (VTAV-1). Further, a reactivity factor Ireact for each VA for each sample: Ireact=(VTAV-1/VTAV-0-1)×100 %. If value Ireact exceeds the range of [-30 %; +30 %] and is accompanied by developing ischemia symptoms in the vertebrobasilar system – vertigo, nausea, ringing in the ears, vertebral artery syndrome is diagnosed. At that, in case Ireact exceeds the interval [-30 %; +30 %] after the head rotations in the neutral position of the neck, VA compression at the C2–C5 level. In case Ireact exceeds the interval [-30 %; +30 %] after the head turns with fixed neck extension, VA compression at S5–S6 level. In case Ireact exceeds the interval [-30 %; +30 %] after the head turns with fixed neck bending, VA compression at the C1-C2 level. In case Ireact exceeds the interval [-30 %; +30 %] after the sample with movements of the head back and forth, VA compression at the level of C0-C1.

EFFECT: method provides determining the level and degree of VA compression by determining reactivity and sampling.

1 cl, 2 ex

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RU 2 711 112 C1

Authors

Kryukov Andrej Ivanovich

Kunelskaya Natalya Leonidovna

Tardov Mikhail Vladimirovich

Zaoeva Zarina Olegovna

Chumakov Pavel Leonidovich

Dates

2020-01-15Published

2019-02-07Filed