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- W1982131766 abstract "The objective of this investigation was to validate a transit-time ultrasound blood flow metering system in vivo. Implanted chronically and acutely on the ascending aorta of the dog, the transit-time flow probe determined varying flow rates simultaneously with mesurements made by the electromagnetic flow metering method. The transit-time technique was als compared to two methods in which blood was collected volumetrically by either graduated cylinder (ascending aorta/dog) or pump withdrawal (abdominal aorta/cat). Statistical analysis of the results provided evidence that the transit-time ultrasound method measured in vivo blood flow rate no differently than the electromagnetic or pump withdrawal techniques, however, transit-time determinations of blood volume were 10% below that indicated by graduated cylinder collection. With transit time represented on the y-axis, three linear regressions of all paired blood flow measurements were calculated yielding the following slopes (Δy/Δx) and regression coefficients (r), respectively: electromagnetic (1.00, 0.98), graduated cylinder (0.85, 0.93), and pump withdrawal (0.93, 1.00). The results validate the transit-time ultrasound system used in the present investigation as an accurate method capable of measuring blood flow in both acutely and chronically animal preparations." @default.
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- W1982131766 date "1994-06-01" @default.
- W1982131766 modified "2023-10-15" @default.
- W1982131766 title "In vivo validation of a transit-time ultrasonic volume flow meter" @default.
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- W1982131766 doi "https://doi.org/10.1016/1056-8719(94)90078-7" @default.
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