ELSS, a compact PCPS (Percutaneous cardio pulmonary support) device for emergency use, is highly required especially for cardio pulmonary arrest patient.  A compact PCPS project has been started in 2004. The device consists of blood pump, oxygenator, drive and control unit and battery unit. A new membrane oxygenator and a new blood pump were designed. They were fabricated in one piece to reduce the priming volume. A prototype model was fabricated and exhibited good performance.  The whole system components are packed in a case having 180 mm in diameter and 390 mm long.  The whole weight will be less than 10 Kg.

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