Blood purification apparatus
First Claim
1. A blood purification apparatus comprising ultrafiltration means (11) for purifying blood, first means (15) for conducting blood from a patient to said ultrafiltration means (11), second means (27) for conducting blood from said ultrafiltration means (11) to the patient, means (23) for controlling the rate of blood flow through said first and second blood conducting means (15, 27), means (24) directly located at the patient'"'"'s body for measuring patient blood pressure (P), means (25 or 26) for determining at least one blood pressure trend value (TRK or TRL), and said controlling means (23) including fuzzy controller means (31) responsive to said measured blood pressure (P) and said at least one blood pressure trend value (TRK or TRL) for automatically affecting patient blood pressure stabilization.
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Accused Products
Abstract
The ultrafiltration rate of a blood purification apparatus is controlled by a fuzzy control device in dependence on the patient'"'"'s (16) blood pressure measured by a blood pressure monitor (24). For this purpose the blood pressure (P), a short-term blood pressure trend value (TRK) and a long-term blood pressure trend value (TRL) are fed as input variables for the fuzzy controller to the control device (23). The ultrafiltration rate (UFR) is determined by the volumetric ultrafiltration pump (36). According to the patient'"'"'s (16) blood pressure situation a prestored profile of the ultrafiltration rate is modified. This avoids the necessity of an additional infusion to prevent too strong a blood pressure decrease.
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Citations
13 Claims
- 1. A blood purification apparatus comprising ultrafiltration means (11) for purifying blood, first means (15) for conducting blood from a patient to said ultrafiltration means (11), second means (27) for conducting blood from said ultrafiltration means (11) to the patient, means (23) for controlling the rate of blood flow through said first and second blood conducting means (15, 27), means (24) directly located at the patient'"'"'s body for measuring patient blood pressure (P), means (25 or 26) for determining at least one blood pressure trend value (TRK or TRL), and said controlling means (23) including fuzzy controller means (31) responsive to said measured blood pressure (P) and said at least one blood pressure trend value (TRK or TRL) for automatically affecting patient blood pressure stabilization.
Specification