Presentation 1996/6/20
Passive Counter Current Exchange Model for Renal Medulla and its Numerical Analysis at Steady State without Active Transport
T. Nishimura, H. Hirayama, Y. Fukuyama,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) We have analyzed the spatial distribution of salt, urea and water volume flow at the inner medulla of kidney by using a steady state passive counter current system. The concentration changes of salt, urea and volume flow of water were expressed by 48 non linear algebraic equations and solved numerically with physiological parameters and initial conditions. The solute concentrations reach the maxima and the flow rate the minimum at the U shaped tube bend. Similar changes occur in the descending limb and in the capillary compartments. These results expressed that a passive counter current system with sources can produce considerable solute concentration gradients without taking into consideration of active transport nor axial diffusion. A passive steady countercurrent model of the renal medulla can express the patho physiological state of renal failure.
Keyword(in Japanese) (See Japanese page)
Keyword(in English) Kidney / Medulla / Countercurrent model / Salt / Urea / Volume flow / Capillary
Paper # MBE96-27
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Committee MBE
Conference Date 1996/6/20(1days)
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Registration To ME and Bio Cybernetics (MBE)
Language ENG
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Passive Counter Current Exchange Model for Renal Medulla and its Numerical Analysis at Steady State without Active Transport
Sub Title (in English)
Keyword(1) Kidney
Keyword(2) Medulla
Keyword(3) Countercurrent model
Keyword(4) Salt
Keyword(5) Urea
Keyword(6) Volume flow
Keyword(7) Capillary
1st Author's Name T. Nishimura
1st Author's Affiliation Electrical and Electronical Engineering, Ohita university()
2nd Author's Name H. Hirayama
2nd Author's Affiliation Department of Public Health, Asahikawa medical college
3rd Author's Name Y. Fukuyama
3rd Author's Affiliation Department of Public Health, Asahikawa medical college
Date 1996/6/20
Paper # MBE96-27
Volume (vol) vol.96
Number (no) 113
Page pp.pp.-
#Pages 8
Date of Issue