Patent ID: 7748438

Claim:
A heat exchanger for medical use, comprising a tube bundle formed by a plurality of tubes having a straight axis for the conveyance of a primary fluid through a passage section thereof, said tubes being embedded at their ends in disks located at the end faces of an outer jacket which is adapted to delimit, together with said disks, a portion of space for the containment of said tube bundle which is designed to be crossed by a secondary fluid, wherein each tube has, at least at a portion of its length, a plurality of consecutive crimps adapted to determine a progressive variation of the shape of the passage section, and wherein each portion of the tube length forming the passage section, and which is comprised between two consecutive ones of said crimps, is shared as a prismoid with two opposite faces in which vertices of the prismoid form opposite quadrilaterals that are joined to each other by trapezoids.