MULTIFACTORIAL ASSESSMENT OF POSTMORTEM LUNG DONOR

The appropriate evaluation and the development of special measures to protect donor lungs are important factors for successful lung transplantation. Aim. To develop and determine the effectiveness of the protocol of morpho- functional assessment of potential lung donor. Methods and results. During the period from May, 2011 to May, 2012, 37 donors with diagnoses of brain death were surveyed. 5 bilateral lung transplantations were performed only in 2 cases donors have been evaluated as «ideal». In the majority of recipients early postoperative period was evaluated as satisfactory. Conclusion. Designed multivariate algorithm of donor with brain death assess- ment, effectively implemented through the selection of donors for lung transplantation with satisfactory results in the early postoperative period. However, compliance with ideal criteria will not allow to effectively provide care for patients with terminal lung disease under conditions of continuous growth of «waiting list»

МНОГОФАКТОРНАЯ ОЦЕНКА ПОСМЕРТНОГО ДОНОРА С ПОЗИЦИИ ТРАНСПЛАНТАЦИИ ЛЕГКИХ

The appropriate evaluation and the development of special measures to protect donor lungs are important factors for successful lung transplantation. Aim. To develop and determine the effectiveness of the protocol of morpho- functional assessment of potential lung donor. Methods and results. During the period from May, 2011 to May, 2012, 37 donors with diagnoses of brain death were surveyed. 5 bilateral lung transplantations were performed only in 2 cases donors have been evaluated as «ideal». In the majority of recipients early postoperative period was evaluated as satisfactory. Conclusion. Designed multivariate algorithm of donor with brain death assess- ment, effectively implemented through the selection of donors for lung transplantation with satisfactory results in the early postoperative period. However, compliance with ideal criteria will not allow to effectively provide care for patients with terminal lung disease under conditions of continuous growth of «waiting list». Цель исследования. Адекватная оценка и разработка специальных мероприятий по защите и восста- новлению морфофункциональнальных свойств легких потенциального донора. Методы и результа- ты. В период с мая 2011 года по май 2012 года наблюдали 37 доноров с диагнозом смерти мозга. Было выполнено 5 билатеральных трансплантаций легких, и только в 2 случаях доноры были определены как удовлетворительные. У большинства реципиентов ранний послеоперационный период протекал удовлет- ворительно. Заключение. Предложенный многофакторный алгоритм поддержки донора со смертью мозга позволяет эффективно отбирать доноров для трансплантации легких с удовлетворительным результатом в раннем послеоперационном периоде. Однако следование идеальным критериям не позволяет оказывать эффективную помощь пациентам в терминальной стадии болезни легких, включенным в лист ожидания трансплантации.

Electrostatic vibration energy harvester with piezoelectric start-up generator

International audienceThe search for compact autonomous devices has been increasing in the microelectronics industry. These devices have the capacity to generate their own energy in order to be charged. One of the ways of harvesting environmental energy for charging such devices is by using mechanical vibrations through the use of variable capacitor. Taking this principle a basis, this work presents a behavioral analysis of a system model of harvesting vibratory energy for low power, made up of a circuit which includes a variable capacitor and a piezoelectric transducer. An architecture of a circuit which improves the ratio “amount of harvested energy - circuit area” comparing with conventional architectures is presented. The conventional circuit harvested a maximum power of 4.5μW whereas the circuit with the new architecture harvested a 6.25 μW power. The paper shows a use of a piezoelectric generator providing initial power and compensating the leakage losses in the capacitors

Development of KM-5 Hall effect thruster and its flight testing onboard GEO spacecraft “Express-A4”

The paper presents the outcomes of development of Keldysh Research Center (KeRC) KM-5 Hall effect thruster and experience obtained from the in-orbit exploiting of the thruster onboard Reshetnev's Scientific and Production Association of Applied Mechanics (NPO PM) “Express-A4” GEO communication spacecraft (SC). KM-5 is a multimode thruster with operational power range from 1 to 2.5 kW in contrast to other thrusters applied in space missions. It has high thrust characteristics. It makes possible solution of orbit raising tasks to geostationary orbit (GEO) for medium and heavy weight SC in addition to tasks of station keeping for geostationary SC already being solved by Hall-effect thrusters. Furthermore, a thruster with such performance can be an efficient choice as a main engine for small interplanetary probes