The purpose of the study was to determine the role of the complex use of FFR and IVUS to verify the diagnosis of coronary heart disease in the examination of the professional suitability of Russian Railways employees, related to safety of train traffic. The study showed that survival rates free of major adverse cardiac events, transient rhythm disturbances, syncopal conditions and repeated hospitalizations for the angina pectoris, in groups with “unchanged” coronary arteries and intermediate stenoses of the coro-nary arteries with FFR negative result were not significantly different in the long-term period and amounted to 100 and 95.2%, respectively (p > 0.05), which makes to consider them as professionally suitable workers and return to work. When comparing this indicator in the subgroups of patients with FFR positive result undergoing stenting under the control of IVUS and patients with FFR negative result receiving optimal medical therapy, there were also no significant differences (97.3 and 95.2%, respectively, p > 0.05), which makes it possible to swich workers who have undergone stenting to 'light' work, not related to the safety of train traffic.

FIELD: medical engineering. SUBSTANCE: device has optical channel for creating reference stimulus of yellow color, optical channel for creating stimulus of test color, unit for superimposing color stimuli in testee vision field. An optical channel for creating test color stimulus has two separate channels of red and green color each of which having additional radiation source with smooth adjustment of its intensity and collimator unit, light filter and aperture mounted in series. Relative openings of apertures enable one to change proportions of red and green color in a test stimulus. The unit for superimposing color stimuli in testee vision field is bilateral mirror plate having unit for building color test stimuli with predefined angular size.

FIELD: medical engineering. SUBSTANCE: device has optical channel for creating reference stimulus of yellow color, optical channel for creating stimulus of test. The purpose of the study was to determine the role of the complex use of FFR and IVUS to verify the diagnosis of coronary heart disease in the examination of.

Each of three optic channels has a system of two objectives. The bilateral mirror plate is movable in the plane running in perpendicular to light beam direction in the optical channels. The optical channels are inclined at an angle of 15-45 deg to each other. The unit for building color test stimuli with predefined angular size has mechanism for moving ribbon bearing a set of calibrated holes in the plane arranged in perpendicular to light beam path in the optical channels.

EFFECT: enhanced accuracy in diagnosing color vision function disorders with light and moderate disorder degree being differentiated. 3 cl, 2 tbl Description Translated from Russian.