| 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 ofa 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, (v2), related to the arterial pressure (Part) in the portion of th e said access branch upstream of the peristaltic pump, (v3), 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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