Patent ID: 11925479
Assignee: FRESENIUS MEDICAL CARE DEUTSCHLAND GMBH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 2:
3. A method in accordance with claim 1, characterized in that the value D is determined, with a known characteristic k0 A of the heat exchanger, from the relationship

D=Qb(eγ−1)/(eγ−(Qb/Qd))  (2)

where γ=k0 A (Qd−Qb)/(QdQb), or

D=Qb(1−eγ)/(1+(Qb/Qd))  (3)

with the formula (2) applying to the flowing through of the heat exchanger in a counter flow and the formula (3) applying to the flowing through of the heat exchanger in coflow, and with the value Qb representing the volume flow of the blood through the heat exchanger.