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- W4253446788 abstract "This paper deals with the peritoneal microcirculation and with peritoneal exchange occurring in peritoneal dialysis (PD). The capillary wall is a major barrier to solute and water exchange across the peritoneal membrane. There is a bimodal size-selectivity of solute transport between blood and the peritoneal cavity, through pores of radius ∼40–50 Å as well as through a very low number of large pores of radius ∼250 Å. Furthermore, during glucose-induced osmosis during PD, nearly 40% of the total osmotic water flow occurs through molecular water channels, termed “aquaporin-1.” This causes an inequality between 1−σ and the sieving coefficient for small solutes, which is a key feature of the “threepore model” of peritoneal transport. The peritoneal interstitium, coupled in series with the capillary walls, markedly modifies small-solute transport and makes large-solute transport asymmetric. Thus, although severely restricted in the blood-to-peritoneal direction, the absorption of large solutes from the peritoneal cavity occurs at a high clearance rate (∼1 mL/min), largely independent of molecular radius. True absorption of macromolecules to the blood via lymphatics, however, seems to be occurring at a rate of ∼0.2 mL/min. Several controversial issues regarding transcapillary and transperitoneal exchange mechanisms are discussed in this paper." @default.
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- W4253446788 date "2001-10-01" @default.
- W4253446788 modified "2023-09-27" @default.
- W4253446788 title "The Peritoneal Microcirculation in Peritoneal Dialysis" @default.
- W4253446788 doi "https://doi.org/10.1038/sj.mn.7800106" @default.
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