Assessment of a potentially noninvasive method for monitoring aortic blood flow in children.
Ultrasonic methods have rendered possible noninvasive quantitative blood flow measurement. In this work, a method is proposed to measure aortic blood flow in children by means of a specially designed miniaturized esophageal probe and an autonomous apparatus combining an M-mode imaging system and a pulsed Doppler. In vivo experimental results in animals are presented and demonstrate the interest of simultaneous and continuous measurement of aortic diameter and blood flow velocity giving accurate measurements. A 0.94 correlation coefficient is found when comparing blood flow in the descending aorta measured using this method and using an electromagnetic flowmeter.
Lavandier
B
B
Institut National de la Santé et de la Recherche Médicale, Lyon, France.
Muchada
R
R
Chignier
E
E
Fady
J F
JF
Birer
A
A
Cathignol
D
D
D000818:Animals; D001013:Aorta, Thoracic / Q000033:anatomy & histology / Q000000981:diagnostic imaging* / Q000503:physiopathology; D001783:Blood Flow Velocity; D002648:Child; D004867:Equipment Design; D004947:Esophagus / Q000648:ultrastructure; D005069:Evaluation Studies as Topic; D006801:Humans; D008433:Mathematics; D011817:Rabbits; D014463:Ultrasonography / Q000295:instrumentation