Method for determining hemodynamic parameters during an extracor

Details Method for determining hemodynamic parameters during an extracor Method for determining hemodynamic parameters during an extracor

1996-11-07

1999-02-02

Drodge, Joseph W.

Liquid purification or separation

Processes

Including controlling process in response to a sensed condition

210 87, 210143, 210149, 210646, 210742, 210929, 604 4, 604 31, 364510, B01D 6132, B01D 6130

Patent

active

058660151

ABSTRACT:
A method and a device for determining hemodynamic parameters during an extracorporeal hemotherapy, in which the blood arrives via the arterial branch (20) of the extracorporeal circuit (9) of the hemotherapeutic device (7), which is in fluid communication with arterial section (21) of a fistula (6), into dialyzer (10) or into a filter of the hemotherapeutic device and is recirculated via the venous branch (22) of the extracorporeal circuit (9), which is in fluid communication with venous section (23) of fistula (6). The temperature T.sub.A prevailing in the arterial branch (20) of the extracorporeal circuit (9) is measured under a changing blood flow, the temperature T.sub.V of the venous branch (22) of the extracorporeal circuit being kept constant. From the determined value pairs of the arterial temperature T.sub.A and of the extracorporeal blood flow Q.sub.B, those parameters of a predetermined function T.sub.A (Q.sub.B) representing the temperature in the arterial branch of the extracorporeal circuit (9) are defined as a function of the blood flow Q.sub.B, which are drawn upon to determine the fistula flow Q.sub.F and/or the body temperature T.sub.B and/or the cardiac output (l/min) CO.

REFERENCES:
patent: 5092836 (1992-03-01), Polaschegg
patent: 5312550 (1994-05-01), Hester
patent: 5453576 (1995-09-01), Krivitski
patent: 5510716 (1996-04-01), Buffaloe et al.
patent: 5588959 (1996-12-01), Ahmad et al.
patent: 5685989 (1997-11-01), Krivitski et al.

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