Patent ID: 9579444
Date: 2017-02-28
CPC Classifications: A61M

Claim:
1. A blood collection system comprising a suction unit; a hose arrangement connected to said suction unit; means for aspirating blood and air through the suction unit and for pumping said blood and air through the hose arrangement; a flow sensing unit for continuously sensing the blood flow through the hose arrangement; an anticoagulant additive dosing system for continuously dosing an anticoagulant additive into said blood flowed through the hose arrangement in response to the continuously sensed blood flow; a mixing unit for mixing the blood with the anticoagulant additive dosed into the blood; and a collection vessel for collecting the mixed blood and anticoagulant additive, wherein said means for aspirating the blood and air through the suction unit and for pumping said blood and air through the hose arrangement is a pump system providing a known constant volume flow of the blood and air in said hose arrangement; the flow sensing unit is arranged for continuously sensing the mass flow of blood through the hose arrangement by means of continuously measuring a parameter indicative of the weight of blood in a tubing section, through which the blood is transported; and the anticoagulant additive dosing system comprises a control unit connected to the flow sensing unit and arranged for automatically controlling the continuously dosing of an anticoagulant additive into said blood flowed through the hose arrangement in response to the continuously sensed mass flow of blood characterized in that said tubing section has two open ends in fluid communication with the hose arrangement, the tubing section being pivotably suspended at an inner end thereof, which comprises the two open ends, and the flow sensing unit comprises a weight sensing arrangement for continuously sensing the parameter indicative of the weight of blood in said pivotably suspended tubing section.