Patent ID: 8224166

Claim:
A liquid heating bag or a blood heating bag, the bag defining a flow volume for a liquid being heated, the bag comprising: a first flexible plastic foil; at least one second flexible plastic foil connected to said first foil to form a flat, substantially trapezoidal basic shape defined by delimiting edges, said delimiting edges including an upper delimiting edge disposed at a top of the bag during liquid heating and an adjacent delimiting edge, wherein said upper delimiting edge extends obliquely with respect to said adjacent delimiting edge to define a gas reception volume in an acute angular region subtended between said upper delimiting edge and said adjacent delimiting edge; a liquid inlet line opening disposed at said upper delimiting edge; a liquid outlet line opening disposed at said upper delimiting edge at a separation from said inlet line opening; a liquid flow guiding seam disposed between said inlet and said outlet openings, said guiding seam formed by connecting said first and said second plastic foils in a region of the flow volume, thereby dividing said upper delimiting edge into a lower inlet line opening region and an upper outlet line opening region disposed at a gas reception volume side of the bag; and a degassing opening disposed at said outlet line opening region of said upper delimiting edge proximate to said gas reception volume and between said outlet line opening and said adjacent delimiting edge.