초록 ▼

A device for heating blood for transfusion is disclosed which has two vertically disposed opposed electrical heating plates which engage the opposite faces of a flat bag of flexible plastic material delimitating a fluid path therethrough which has a width progressively increasing from a lower inlet

A device for heating blood for transfusion is disclosed which has two vertically disposed opposed electrical heating plates which engage the opposite faces of a flat bag of flexible plastic material delimitating a fluid path therethrough which has a width progressively increasing from a lower inlet pipe for connection to a blood supply to an elongated single rectilinear main portion of uniform width and progressively decreasing from the elongated main portion toward an upper outlet pipe for connection to injection means. A flow restricting means is disposed therein on an intermediate level between the inlet pipe and the main portion of the fluid path to restrict the travel of fluid introduced by the inlet pipe and produce a substantially homogeneous flow all across the main portion of the fluid path. The heating plates include heat radiating fins or corrugations to reduce thermal inertia as the rate of blood flow changes. The electric heating means of each plate is so distributed that the heating power gradually decreases from the bottom to the top of each plate.

대표청구항 ▼

A device for heating blood for transfusion, comprising two vertically disposed opposed electric heating plates engaging the opposite faces of a flat bag for supplying heat thereto and temperature regulating means for controlling an electric current supplied to the heating plates according to the tem

A device for heating blood for transfusion, comprising two vertically disposed opposed electric heating plates engaging the opposite faces of a flat bag for supplying heat thereto and temperature regulating means for controlling an electric current supplied to the heating plates according to the temperature of the bag, said flat bag being made of a flexible plastic material and delimitating a fluid path through said bag which has a width progressively increasing from a lower inlet pipe for connection to a blood supply means to a single rectilinear elongated main portion of uniform width and progressively decreasing from said elongated main portion towards an upper outlet pipe for connection to injection means, said bag comprising flow restricting means at an intermediate level between the inlet pipe and the main portion of the fluid path, restricting the travel of fluid introduced by said inlet pipe and producing a substantially homogeneous flow rate all across the main portion of the fluid path.