| 摘要 |
Equipment for controlling blood flow in an extracorporeal blood circuit, comprising at least a first sensor ( 11 ), designed to measure an arterial pressure (Part) upstream of a peristaltic pump ( 9 ); at least a second sensor ( 12 ), designed to measure an angular velocity (Omega) of the peristaltic pump; a memory ( 14 ) designed to store at least one set value (Qset) of the desired blood flow through the access branch, and a calibration function (F) in at least the variables (vI), related to the angular velocity (Omega) of the pump, (v 2 ), related to the arterial pressure (Part) in the portion of the said access branch upstream of the peristaltic pump, (v 3 ), related to an actual flow of blood (Qactual) through the said access branch; and at least one control unit ( 13 ), capable of calculating an actual flow value (Qactual) by applying the function F to the values of angular velocity and arterial pressure (Part, Omega) measured by the sensors; comparing the actual flow (Qactual) with the desired flow (Qset); and varying the angular velocity of the said peristaltic pump if the Qactual-Qset lies outside a predetermined range.
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