CEREBRAL-RENAL CONNECTIONS OF ELDERLY AGED PEOPLE IN THE REPUBLIC OF SAKHA (YAKUTIA), SUFFERING FROM CHRONIC ISCHEMIA OF BRAIN Церебро-ренальные взаимоотношения у лиц пожилого и старческого возраста республики Саха (Якутия), страдающих хронической ишемией мозга

The study included 245 patients from 60 to 89 years, comparable by age and sex, were divided into two groups according to region of residence (Arctic and Antarctic), for two age groups (elderly and senile age) and by the sex. The main method of the study of cerebral hemodynamics in this work has been ultrasound dopplerography (usdg). Doppler sonography survey with color scanning and spectral Doppler analysis of the cervical arteries on extracranial level was performed according to standard method for ultrasound systems ACUSON “Sequoia-512” sensor linear format of the generated frequency of the ultrasonic signal 4 and 8 MHz in the ever-wave mode. The entire sample investigated the functional state of the kidneys. GFR was determined by the settlement formulas; Cockcroft&Gault GFR= (140-age) × body weight (kg) 810* creatinine of blood (mol/l)×E, where E-1,23 for men, 1,04-for women and MDRD: GFR= 186×(creatinine of blood mg/dd)-1,154 × (age)-0,203 × (0,742 for women) with subsequent determination of the stages of chronic kidney disease. We used a brief MDRD formula, which of laboratory indicators requires only establishing the values of concentrations of serum creatinine