| US 7,575,562 B2 | ||
| Blood purification device | ||
| Takayuki Oishi, Haibara-gun (Japan); and Yasushi Takakuwa, Haibara-gun (Japan) | ||
| Assigned to Nikkiso Co., Ltd., Tokyo (Japan) | ||
| Filed on Sep. 26, 2005, as Appl. No. 11/235,916. | ||
| Claims priority of application No. 2004-294106 (JP), filed on Oct. 06, 2004. | ||
| Prior Publication US 2006/0074369 A1, Apr. 06, 2006 | ||
| Int. Cl. A61M 37/00 (2006.01); A61M 1/00 (2006.01) | ||
| U.S. Cl. 604—4.01 [604/5.01; 422/44] | 11 Claims |
| 1. A blood purification device comprising:
a blood circuit having an arterial blood circuit and a venous blood circuit to circulate extracorporeally blood collected
from the patient;
a blood pump provided for said arterial blood circuit;
a blood purification means, connected between said arterial blood circuit and said venous blood circuit, for purifying the
blood flowing in said blood circuit;
a venous blood pressure measuring means for measuring the pressure of a patient's blood flowing in said venous blood circuit;
a venous blood pressure monitoring means for activating an alarm by comparing a predetermined alarm-threshold pressure with
pressure measured or pressure predicted to be measured, as a base value, by the venous blood pressure measuring means; and
a device that is configured to determine a time interval to update the alarm-threshold pressure of said venous blood pressure
monitoring means by calculating a level of variation in the pressure measured by said venous blood pressure measuring means,
wherein said venous blood pressure monitoring means updates said predetermined alarm-threshold pressure after said time interval.
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