Patent ID: 8211047

Claim:
Blood isolated ultrafiltration device, comprising: a filter body, having an inlet port and an outlet port for blood to be filtered and a discharge port for extracted waste liquid; a case maintaining said filter body in a working position and forming, in different portions thereof, two peristaltic pump rotor chamber, housing a corresponding peristaltic pump rotors; a pair of electric motors, each placed outside said case and axially to the peristaltic pump rotors, with a respective drive shaft apt to be engaged into each corresponding peristaltic pump rotor through said case; a delivery flexible hose of the blood to be filtered, connected to said inlet port and to further ducts linked to a circulatory system, including a portion thereof arranged inside a first peristaltic pump rotor chamber for obtaining a peristaltic effect for the circulation of blood to be filtered; a discharge hose of the waste liquid from the filter body, connected to said discharge port, including a portion thereof arranged inside a first peristaltic pump rotor chamber for obtaining a peristaltic effect for the waste liquid circulation, wherein: said case, with said rotor chambers and the peristaltic pump rotors, forming a disposable kit to be associated to said motors by engaging and disengaging said peristaltic pump rotors to and from said drive shafts. said filter body has an elongated shape, with said inlet port placed at one of the ends thereof, said working position determining said end be placed in proximity of said rotor chamber; in said working position, said filter body being vertically placed, said case forming a resting basement for the end of said filter body; said electric motors are housed in a body case independent upon said case containing said filter body; and the basement comprises means for measuring the weight of the case, the basement being mounted on stems through which said means for measuring the weight operate.