title: A unique, efficient, implantable, electromechanical, total artificial heart.
abstract: A completely implantable, one piece electromechanical total artificial heart (TAH) intended for permanent human use was developed. It consisted of left and right conically shaped pusher-plate blood pumps sandwiching a thin centerpiece with a compact, efficient electromechanical actuator. The actuator consisted of a direct current brushless motor; a planetary roller screw fit the space between the two conically shaped pusher-plates. The rotational motion of the motor was converted to the rectilinear motion of the rollerscrew to displace the left and right pusher-plates in the left master alternate mode. The diameter of the assembled TAH was 97 mm, with a central thickness of 82 mm. The overall weight was 620 g, with a displaced volume of 510 ml. The pump provided flows of 3-8 L/min with a preload of 1-15 mmHg against an afterload of 100 mmHg. The net efficiency ranged from 15% to 18%. This model showed good fit in the pericardial space of heart transplant recipients (body weight, 77 kg).
authors.affiliation: Department of Surgery, Baylor College of Medicine, Houston, Texas 77030.
authors.forename: S
authors.initials: S
authors.lastname: Takatani
authors.forename: M
authors.initials: M
authors.lastname: Shiono
authors.forename: T
authors.initials: T
authors.lastname: Sasaki
authors.forename: I
authors.initials: I
authors.lastname: Sakuma
authors.forename: J
authors.initials: J
authors.lastname: Glueck
authors.forename: M
authors.initials: M
authors.lastname: Sekela
authors.forename: G
authors.initials: G
authors.lastname: Noon
authors.forename: Y
authors.initials: Y
authors.lastname: Nose
authors.forename: M
authors.initials: M
authors.lastname: DeBakey
mesh_terms: D002302:Cardiac Output / Q000502:physiology; D011211:Electric Power Supplies; D006354:Heart, Artificial; D006801:Humans; D008955:Models, Cardiovascular; D011474:Prosthesis Design