Kidney International (1972) 2, 293–295; doi:10.1038/ki.1972.110
Effects of ultrafiltration on dialysance in commercially available coils
Karl D Nolph1, Richard J Nothum1 and John F Maher1
1Department of Medicine, University of Missouri Medical Center, Columbia, Missouri
Correspondence: Dr Karl D Nolph, Department of Medicine, University of Missouri Medical Center, Columbia, Missouri 65201, U.S.A.
Received 18 June 1972; Revised 9 August 1972.
Top of pageAbstract
A decrease in urea dialysance in Travenol 1.9 m2 cellophane (190) hemodialysis coils was demonstrated as outlet pressure was increased by partial clamping of outlow tubing [11. Suggested explanations include impingement of membrane against mesh with loss of area and increased resistance of fluid films as intracoil hydrostatic pressure increases. It has been generally asumed that increasing ultrafiltration by raising transmembrane hydrostatic pressure with outlet clamping decreases dialysis efficiency in all coil types. In these studies the relationships of dialysance rates and mean hydrostatic intracoil pressure (MCP) are compared in 190 and newer type coils. The studies demonstrate that in newer coils solute transport rates do not decrease with intracoil pressures as previously assumed.
Top of pageReferences
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