title: Clinical application of a newly developed autoflow control system for the Terumo centrifugal pump: from external control to built-in direct control.
abstract: We have developed an autoflow control system for the Terumo Capiox centrifugal pump, the SP-101. First, we made an external control system regulated by a personal computer through a serial communications line. Although an in vivo experiment using a goat showed excellent performance in regulating the flow, a communication error that caused an abrupt and instantaneous flow fluctuation was noted occasionally. Therefore, we incorporated a check-sum function to solve this problem. After this improvement, 5 patients safely underwent cardiopulmonary bypass using a pump having this autoflow control. As the next step for more practical usage, we developed a built-in autoflow control system in which the control device is entirely incorporated into the console without a communications line. This system demonstrated better response and reliability than the external control system and was applied successfully in 3 patients. In conclusion, this autoflow mode will expand the usage of centrifugal pumps through improved handling.
authors.affiliation: Department of Cardiovascular Surgery, Heart Institute of Japan, Tokyo Women's Medical College, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Nishida
authors.forename: T
authors.initials: T
authors.lastname: Nishinaka
authors.forename: M
authors.initials: M
authors.lastname: Endo
authors.forename: H
authors.initials: H
authors.lastname: Koyanagi
authors.forename: H
authors.initials: H
authors.lastname: Oshiyama
authors.forename: A
authors.initials: A
authors.lastname: Nogawa
authors.forename: T
authors.initials: T
authors.lastname: Akutsu
mesh_terms: D000465:Algorithms; D002315:Cardiopulmonary Bypass; D002498:Centrifugation; D003198:Computer Simulation; D004867:Equipment Design / Q000639:trends; D004869:Equipment Safety / Q000592:standards; D006353:Heart-Assist Devices / Q000592:standards*; D006801:Humans; D011786:Quality Control; D012212:Rheology / Q000379:methods