Applicability of the single-layer flat-coil-oscillator technology-based vibration and vibro-acoustic sensors in medical and biological study of the cardiovascular system: Advantages and perspectives of the carotid pulse wave registration.

The possibility and feasibility of using the single-layer flat-coil-oscillator (SFCO) technology-based vibration and vibro-acoustic sensors in diagnostic devices and biomedical studies of the cardiovascular system are discussed in this paper. Using an example of recording pulse waves of left carotid artery and their analysis, the information content of the data recorded by these sensors in a number of cases is shown-assessment of age-related changes in the stiffness of the vascular wall, assessment of the dynamics of systolic volume, reflecting myocardial contractility, and rhythm disturbance (extra-systole and arrhythmia). These sensors are shown to be promising in recording heart sounds due to their high sensitivity.

[Repeated resection of liver in primary and metastatic cancer].

164 operations for malignant tumors of the liver were performed in Cancer Research Center. 14 patients underwent repeated resections of the liver, 5 of them due to primary cancer of the liver and 9--with metastatic liver disease. Recurrence was revealed in 6 from 14 patients (42.

[Current approaches to surgical treatment of liver tumors].

Since 1990, 230 operations for focal pathologies in the liver have been carried out at the Center's clinics using such advanced procedures and equipment as radio-isotope examination of hepatic function, ultrasonography of the liver during surgery, ultrasound aspirator, water-flow scalpel, argon coagulator and adhesive dressing materials. The study included 75 resections for primary hepatic tumor (lethality-14.6%), 114 resections-disseminated tumor (lethality-5.

[The role and place of serologic research in the system of epidemiologic surveillance of meningococcal infection].

The results of serological surveys, carried out with a view to the detection of capsular meningococcal polysaccharides in the passive hemagglutination (PHA) test and covering 1,289 patients with systemic meningococcal infection, 221 patients with bacteriologically confirmed meningococcal nasopharyngitis, 2,820 persons in organized groups of children and adults with different epidemiological situation (including 650 carriers) and 4,050 residents of 8 cities with different morbidity levels, were analyzed. The patients, the carriers and the members of organized groups underwent multiple surveys. As shown in this study, the confirmation of the meningococcal etiology of the systemic forms of meningococcal infection (meningitis, meningococcemia) in all cases with the exception of children under 1 year of age, as well as the determination of the groups of meningococci, could be achieved in the PHA test twice as frequently, i.