Blood reservoir, blood delivery instrument, and blood delivery apparatus

摘要

A blood reservoir (10) includes a blood tank (2), a blood accumulator (3) connected in fluid communication with an outlet of the tank for receiving blood from said tank, and a pumping means (4) for driving the accumulator to displace blood out of the accumulator. The accumulator (3) typically in the form of a flexible bag is adapted to store blood in an amount proportional to the volume of blood in the tank when the volume of blood in the tank is reduced below a predetermined value. The pumping means (4) is operated for intermittent blood delivery and can regulate the amount of blood displaced out of the accumulator.