Nephrology Medical News about Medullary Concentrating Process

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An Inner Medullary Concentrating Process Actuated by Renal Pelvic/Calyceal Muscle Contractions: Assessment and Hypothesis
Nephron: Physiology, 07/16/09

Pinter GG et al. - A mechanism of an inner medullary concentrating process in which water extraction is accomplished by a colloid osmotic mechanism and hydrostatic pressure is proposed. These features suggest that rhythmic, small pressure increases of the pelvic/calyceal muscles squeeze dilute fluid out of the HA compartment and, at the same time, accelerate the outflow of fluid and albumin into the ascending vasa recta from the EPA compartment.

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