current research, that involves laboratory investigations into the phenomena of solubility, uses circulation equipment that has been developed to study the enlargement of joint aperture. this paper describes the preliminary results of laboratory experiments on ten different length and width of samples, which show that the flow rate through the fissures increases with time as the fissures enlarg...

BACKGROUND The main hypothesis of this study is that neutral pH, low glucose degradation product (GDP) peritoneal dialysis (PD) fluid better preserves residual renal function in PD patients over time compared with conventional dialysate. METHODS/DESIGN Inclusion criteria are adult PD patients (CAPD or APD) aged 18-81 years whose first dialysis was within 90 days prior to or following enrolmen...

Blood flow rate (BFR) <300 mL/min commonly is used to define hemodialysis catheter dysfunction and the need for interventions to prevent complications. The objective of this study was to describe patterns of unplanned BFR <300 mL/min during catheter hemodialysis using data from DaVita dialysis facilities and the United States Renal Data System. Patients were included if they received at least e...

Diafiltration is term used reflecting tangential flow filtration (TFF) method of “washing” or removing a permeable molecule (impurities, salts, solvents, small proteins, etc) from a solution in an accelerated method when compared to dialysis tubing. By selecting the appropriate membrane(s), it can also be used to exchange buffers, narrow particle size distributions, modify salt concentrations o...

Numerous studies have confirmed beneficial effects of polyglucose dialysis solution (PG-DS), an amino acid dialysis solution (AA-DS), and bicarbonate (bic) or bicarbonate/lactate (bic/lac) buffered solutions on selected components of peritoneal bioavailability or clinical parameters of peritoneal dialysis (PD) patients. Few adverse effects have also been described. A question arises whether the...

membranes. My studies led to the conclusion that the sieving properties of a given membrane were dependent on the blood flow rate, wall shear rate, and protein concentration polarization at the blood-membrane interface. Lee spent an entire afternoon with me, analyzing the data and discussing the content of my research with humility and comprehension, treating me as his peer ( Fig. 1 ). We event...

in this paper, we have tried to find a solution for quick transfer of nuclear wastes from pools of cool water to dry stores to reduce the environmental concerns and financial cost of burying atomic waste. therefore, the rate of heat transfer from atomic waste materials to the outer surface of the container should be increased. this can be achieved by covering the bottom of the pool space with c...

Four catheters (Ash Split Cath, Tesio, Duo-Split, and Duo--Flow; Medcomp, Harleysville, PA, U.S.A.) were tested in a temperature-controlled in vitro setup filled with 50% aqueous glycerin solution to determine hydraulic resistance at different flow rates. All these catheters have side holes; hydraulic resistance was determined with these holes open and closed. Due to extra pressure losses near ...

Unplanned start of dialysis is still a common and important problem for dialysis units in Europe and across the world: 30%-50% of patients can commence therapy in that way. Such patients are known to experience increased morbidity and mortality, to make greater demands on health care resources, and to be less likely to receive their dialysis modality choice. We therefore aimed to meet the speci...