Artificial lungs: current state and trends of clinical use and research and development.

This article describes recent progress in the field of artificial lungs, centering on the current state and trends in clinical use and research and development. Trends in the recent clinical use in Japan can be found in shipment-number-based surveys as well as in the questionnaire surveys for clinical extracorporeal membrane oxygenation (ECMO) and percutaneous cardiopulmonary support (PCPS). It is likely that the use of artificial lungs for open-heart surgery has peaked, and this can be attributed to the rapid expansion and popularization of off-pump coronary artery bypass grafting surgery. In contrast, the increase in the number of artificial lungs used in assisted circulation cases is showing significant growth. Along with such clinical trends, research and development toward next-generation systems is active in the field of assisted circulation, focusing on emergency or long-term use of PCPS or ECMO. Approaches include enhancing the performance of conventional systems in terms of long-term durability and hemocompatibility, developing a novel device by integrating the oxygenator with the blood pump, and developing an implantable type of artificial lung such as an intravenous oxygenator. Next-generation devices not only will benefit a multitude of patients but also represent an important target with the prospect for expansion of the market for artificial lungs. In the future, further expansion of research and development in this field, as well as progress in practical and clinical applications of innovative devices, is expected.