title: Validation of a transit time blood flow meter used for coronary bypass surgery.
abstract: The validation of a blood flow meter is presented. This flow meter is based on the transit time method that uses two ultrasound transducers and a reflector. The measuring is based on the time difference of the upstream and the downstream ultrasound transit time. The validation was based on the norm ANSI Std. N42.17A-2003 of blood flow protocol. We used a flow simulator system with 3 mm pipe, bi-distilled and desgasificated water as fluid. Flow simulator system uses a constant flow pump, regulated by a valve, and a peristaltic flow pump, regulated by a variable voltage source, like flow source through the pipe.
authors.affiliation: Electrical Engineering Department, CINVESTAV-IPN, C.P. 0736, Mexico D.F., Mexico. rortega@cinvestav.mx
authors.forename: R
authors.initials: R
authors.lastname: Ortega-Palacios
authors.forename: E
authors.initials: E
authors.lastname: Moreno
authors.forename: L
authors.initials: L
authors.lastname: Leija
authors.forename: A
authors.initials: A
authors.lastname: Vera
mesh_terms: D001783:Blood Flow Velocity; D001026:Coronary Artery Bypass / Q000295:instrumentation*; D006801:Humans; D016018:Least-Squares Analysis; D008955:Models, Cardiovascular; D015203:Reproducibility of Results; D012212:Rheology / Q000295:instrumentation* / Q000379:methods; D012815:Signal Processing, Computer-Assisted; D014463:Ultrasonography / Q000295:instrumentation*