Patent ID: 7175697

Claim:
An extracorporeal blood circuit comprising an auxiliary line having at least a first end communicating with said extracorporeal blood circuit and a second end communicating with a medical apparatus during operation, said auxiliary line being provided with at least one device for protecting said medical apparatus, said protecting device comprising: a hollow body having at least three portions, in which: a first end portion having a first tubular connector, in fluid communication with said first end; a second end portion, opposite said first end portion having a second tubular connector, in fluid communication with said first tubular connector by means of a cavity which is internal of said hollow body, said second tubular connector being in fluid communication with said second end; and a third intermediate portion, configured between said first end portion and said second end portion, said third intermediate portion is coupled, at a first side thereof, to said first end portion along at least a first union zone, and said third intermediate portion is coupled, at a second side thereof, opposite to said first side thereof, to said second end portion along at least a second union zone; and at least two filter membranes in which: a first membrane, contained in said hollow body, defines, in said cavity, a first gas-permeable anti-contamination barrier, arranged transversally between said first end portion and said third intermediate portion; and a second membrane, contained in said hollow body, defines, in said cavity, a second gas-permeable anti-contamination barrier, arranged transversally between said second end portion and said third intermediate portion.