Comparison of segmental arterial compliance determined with three and four element Windkessel models

Ferreira, Arthur de Sá; Filho, José Barbosa; Souza, M.N.

doi:10.1109/iembs.2003.1280813

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…Os dados experimentais utilizados foram coletados em trabalhos anteriores (Ferreira, 2002;Ferreira et al, 2004). Ondas de pressão proximal e distal foram adquiridas no segmento B-R de 63 indivíduos normotensos utilizando transdutores piezoelétricos (HP 21050-A, banda passante de 0,01 Hz a 2 kHz) conectados a préamplificadores desenvolvidos para esse estudo.…”

Section: Dados Experimentaisunclassified

“…Diversos modelos têm sido propostos para determinar os parâmetros mecânicos do sistema arterial. Os mais utilizados são os modelos que utilizam parâmetros concentrados windkessel com três ou quatro elementos (Wk-3 e Wk-4, respectivamente) (Burattini e Natalucci, 1998;Ferreira, 2002;Ferreira et al, 2004;Li et al, 1990;Toy et al, 1985;Stergiopulos et al, 1995;Stergiopulos et al, 1999). Apesar do amplo uso, estes modelos não modelam as reflexões provenientes dos pontos de descasamento de impedância do sistema circulatório e por isso não representam adequadamente a fase diastólica do pulso de pressão (parte da morfologia do pulso composta pelas reflexões).…”

Section: Introductionunclassified

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Avaliação de um modelo de parâmetros distribuídos aplicado à estimação da geometria arterial na hipertensão

Ferreira¹,

Souza²,

Filho³

2008

RBEB

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Arterial hypertension leads to structural adaptation of arteries, mainly hypertrophy or remodeling, which precedes target-organ injuries. Determination of both mechanical and geometrical variables related to arterial system allows physicians to identify early arterial adaptation derived from systemic hypertension and to propose therapeutics. This work presents the evaluation of an electric-hydraulic model, and associated method, for determination of geometrical and mechanical parameters of forearm arteries. The proposed method requires only noninvasive acquisition of two pressure pulses at distinct sites. Series of pressure pulses from radial artery were simulated using acquired brachial artery pulses and a simplified distributed-model of the forearm arteries. The model presents three sections, representing brachial, radial, and hand vasculature. Brachial and radial arteries were represented with resistive (friction), inductive (blood mass), and capacitive (arterial compliance) elements. The hand was modeled with resistive (small vessels and capillaries) and capacitive elements (small vessels compliance). The results show that an average estimation error of 3.7% is small compared to "in vivo" findings (changes up to 15%), indicating that the procedure can be used to assess the remodeling of medium-sized arteries on primary systemic arterial hypertension.

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Section: Dados Experimentaisunclassified

Section: Introductionunclassified

Avaliação de um modelo de parâmetros distribuídos aplicado à estimação da geometria arterial na hipertensão

Ferreira¹,

Souza²,

Filho³

2008

RBEB

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“…A little simpler approach -electric or electrohemodynamic analogy models. From this group widely used are two, three or even four element Windkessel models [3]. They give lumped representation of a heart-circulatory system and can help to understand how the arterial system functions, can be used as a realistic load in isolated heart studies and can form the basis for the estimating arterial system parameters.…”

Section: Introductionmentioning

confidence: 99%

Distributed parameter arterial tree modeling using D mode ultrasound images

Kupciunas¹,

Kopustinskas²

2011

ultra

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Distributed parameter arterial tree model, based on transmission line theory is proposed. Adequacy of the model is confirmed using noninvasive "in vivo" ultrasound Doppler images. Ultrasound measurements in three characteristic locations of human arterial tree are performed. Comprised model enables to acquire typical blood flow time functions in 40 arteries. Parameters of the model are related to relevant geometrical and mechanical arteries properties. The model can be used in the research into the influence of blood vessel mechanical parameters on the form of flow time function as well as when estimating possibilities of diagnostics of blood flow system lesion.

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“…In 1967, Goldwyn and Watt [13], [14] first used the Windkessel model in arterial compliance estimation. Besides Jay N. Cohn, many other researchers have improved the Windkessel model and used the modified model to evaluate the arterial compliance [2], [4], [15]. Almost all of these models assume that human arterial compliance is a constant and not related with the blood pressure, which is inadequate to describe the property of arterial system and not valid for the high pressure situation [18].…”

Section: Introductionmentioning

confidence: 99%

A Novel Algorithm for Estimating Arterial Pressure-Dependent Compliance

Sun

Liu

Yang

et al. 2009

2009 3rd International Conference on Bioinformatics and Biomedical Engineering

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The pressure-dependent compliance is being paid more and more attention with the research on cardiovascular diseases, because it provides us a new perspective to understand the relation between the arterial compliance and the blood pressure. Based on previous work, the paper proposes a novel algorithm to estimate human arterial pressure-dependent compliance. The nonlinear differential equation incorporating the pressure-dependent compliance is transformed into a linear equation, from which the optimal parameter of the pressuredependent compliance is calculated using the least square method. 30-day continuous measurements of the same subject's arterial pressure-dependent compliance have been carried out, the results of which are provided.

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Comparison of segmental arterial compliance determined with three and four element Windkessel models

Cited by 6 publications

References 12 publications

Avaliação de um modelo de parâmetros distribuídos aplicado à estimação da geometria arterial na hipertensão

Avaliação de um modelo de parâmetros distribuídos aplicado à estimação da geometria arterial na hipertensão

Distributed parameter arterial tree modeling using D mode ultrasound images

A Novel Algorithm for Estimating Arterial Pressure-Dependent Compliance

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