منابع مشابه
Assisted Circulation
A NUMBER of methods utilizing extracorporeal devices to assist the circulation have been described and tested experimentally during the past five years.'-' The two categories into which these methods may be divided are synchronous and asynchronous assistance. Both of these approaches attempt to relieve the work of the heart and to provide an adequate arterial perfusion pressure. Asynchronous pa...
متن کاملSaint Christopher to the heart-assisted circulation.
seem more timely and valuable than others, and in the former category is the paper in the current issue entitled, "Assisted Circulation ," by Cooper and Dempsey.' In our opinion, this essay is both comprehensive and scientifically critical and presents the problems associated with the development of mechanical aids to increase the circulation of blood to the body with penetrating insight and co...
متن کاملSoliton-assisted unidirectional circulation in a biochemical cycle.
The unidirectional circulation of an enzyme round a working cycle can be understood in terms of the formation and decay of a soliton that acts as a ligand for the protein and for which the surrounding heat bath serves as a sink. An experimental confirmation of this interpretation is suggested in which the soliton is of the Davidov type and is created by infrared photon absorption as in recent e...
متن کاملClinical experience of a vacuum-assisted nonroller extra-corporeal circulation system.
We designed a nonroller extra-corporeal circulation system (NRECC) to minimize space requirements and to improve the safety and ease of cardiopulmonary bypass. The NRECC includes a circuit, a centrifugal pump, and a vacuum regulator. The vacuum regulator has five channels, each of which can control negative pressure independently. Negative pressure is applied to suctions, a vent, and a venous r...
متن کاملVital organ perfusion during assisted circulation by manipulation of intrathoracic pressure.
BACKGROUND We have previously shown, in dogs with severe cardiac depression, that modest cyclic increases in intrathoracic pressure, starting synchronously with left ventricular isovolumic contraction, significantly increase aortic flow and pressure. However, little is known of changes in vital organ perfusion during this technique of assisted circulation. METHODS AND RESULTS We studied regio...
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ژورنال
عنوان ژورنال: JAPANES JOURNAL OF MEDICAL INSTRUMENTATION
سال: 1983
ISSN: 0385-440X,1881-4875
DOI: 10.4286/ikakikaigaku.53.2_56