Non-reservoir closed extracorporeal circulation system especially for neonates and infants

概要

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In the open heart surgery for neonates and infants, the precise regulation and control system of extracorporeal circulation is essential. For this purpose, the very compact circuit was designed and applied experimentally and clinically. It consists of two portions, main circuit and additional parts. Main circuit is closed and non-reservoir system. Its priming volume is under 400ml, including 50ml flexible bag. The flexible bag functions as a safety guard. When the bag collapsed completely, the negative pressure occurs in the venous line but it does not transmit to the patient's heart across the bag. Under this system, if necessary, any excess or lack of circulating blood is regulated temporarily by opening the connecting line to the reservoir of additional system in a short minutes. Three hours hypothermic extracorporeal circulation including one hour aorta cross clump using small canine (B. W. 6-7kg) and the clinical application for infant cases (VSD and ECD) were performed without any problem. No unacceptable hematologic data were obtained in this series. Using this system, however, surgeons should take care much more than before to suction the blood separately from other crystalloid solution during procedure. It is essential and the most important point to use this system in success and to perform the extracorporeal circulation safely in neonates and infants.
一般社団法人日本人工臓器学会の論文