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Nordic M, Giove S, Lorenzi S, Marchini P, Saporiti E. A New Approach to Blood Pressure and Blood Volume Modulation during Hemodialysis: An Adaptive Fuzzy Control Module. Int J Artif Organs 2018. [DOI: 10.1177/039139889501800907] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The paper proposes a fuzzy logic based procedure able to control as far as possible the behaviour of the blood pressure of a patient during a dialysis session, allowing him to reach the foreseen dry weight. A PI discrete-time fuzzy control is used in order to compare the controlled variables concerning the (blood pressure and blood volume) to the reference values. Two different reference tables, concerning the pressure and volume errors and rates are introduced, then the proposed control actions are mixed in order to obtain the final value (net ultrafiltration rate). A smooth function of volemia acts on the second control variable, Na concentration in the dialysate. The adaptive control system was simulated on an IBM-PC, rules and terms were expressed by linguistic judgements like: IF “situation”, THEN “action”. A pre-processor converts the rules into the numerical values of the reference tables. The obtained simulation results are satisfactory, the introduction of the Na control allows reaching the target dry weight of the patient with a stable blood pressure.
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Affiliation(s)
- M. Nordic
- Division of Nephrology and Dialysis, Ospedale Civile, Venezia
| | - S. Giove
- Department of Computer and Management Sciences, University of Trento, Trento - Italy
| | - S. Lorenzi
- Division of Nephrology and Dialysis, Ospedale Civile, Venezia
| | - P. Marchini
- Division of Nephrology and Dialysis, Ospedale Civile, Venezia
| | - E. Saporiti
- Division of Nephrology and Dialysis, Ospedale Civile, Venezia
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Leypoldt JK, Cheung AK. Extracellular Volume in Nocturnal Hemodialysis. Semin Dial 2002. [DOI: 10.1046/j.1525-139x.1999.90202.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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