[The role of the phenomenon of the redistribution of aminoglycosides in their monitoring and dosage calculation in patients in the terminal stage of kidney failure undergoing systematic hemodialysis treatment].

The kinetics of aminoglycosides (amikacin, netilmycin, gentamicin, tobramycin) were investigated in patients with end-stage renal disease who were on systemic hemodialysis. Their decrease in the blood revealed in pre-dialysis and dialysis periods was exponential. After dialysis termination there was a gradual aminoglycoside increase as compared to the end-dialysis period, which was of linear character and depended on the degree of these agents' dialysis clearance.

[The effect of heparin on the lipid level during hemodialysis].

The level of free fatty acids, triglycerides, and total lipids was studied in dynamics during hemodialysis. At the beginning of hemodialysis, fatty acids are discharged into the blood flow and their level at 20 min of hemodialysis is three-fold the initial level. Plasma triglycerides, which are components of lipoproteins, are the source of the discharge of free fatty acids.

[Changes in the beta 2-microglobulin level during hemodialysis].

The authors studied changes of the beta 2-microglobulin level during hemodialysis with dialyzers AIP-02-02 (cuprophane membrane), E2 (cuprophane membrane), AIP-03-02 (polysulfone membrane), F60 (polysulfone membrane), and hemodiafiltration with dialyzer F60. The following data were obtained. The beta 2-microglobulin level in patients undergoing hemodialysis is approximately 20 times the normal level.

[The effect of hemodialysis on lipid peroxidation].

With regard to the variance in the levels of lipid peroxidation products (malonic dialdehyde and diene conjugates) the authors studied the impact of hemodialysis on lipid peroxidation. Transitory activation of lipid peroxidation with a subsequent decrease in the levels of lipid peroxidation products that were lower than initial ones were noted at the initial stages of hemodialysis performed with the use of a DEP-02-02 dialyzer (with a cuprophane membrane). The comparison of the input and output levels of lipid peroxidation products failed to demonstrate any generation of lipid peroxidation products inside the dialyzer.

[Plasmapheresis in the combined therapy of the acute rejection reaction and of suppurative-septic complications in the pretransplantation period].

To define the efficacy of plasmapheresis performed as part of combined treatment for steroid-resistant patterns of acute rejection of a renal transplant, the results of the treatment were analysed in 11 patients. The analysis also involved the results of plasmapheresis treatment of 3 patients with terminal renal failure complicated with septic conditions and 1 patient with stenosed artery of the transplanted kidney and irreversible arterial hypertension. Plasmapheresis was used in various terms of rejection after a 3-4-day prednisolone pulsatile therapy.

[The development of calcium metabolic disorders in patients in the terminal stage of chronic kidney failure receiving hemodialysis treatment].

To follow calcium metabolism in patients with a terminal stage of chronic renal failure who are on hemodialysis treatment is necessary for the assessment of phosphorus/calcium metabolism in a whole, efficiency of conservative treatment, indications to surgical intervention (parathyroidectomy, renal allotransplantation). The investigation included the assessment of total and ionized calcium blood plasma levels with regard to hemodialysis duration; the correlation of clinical and roentgenological picture of secondary hyperparathyroidism. A total of 222 patients were observed, and with regard to hemodialysis duration allocated into 5 groups: in the first hemodialysis lasted for not more than 3 mos; in the second--from 3 mos to 1 yr; third group with its duration from 1 to 2 yrs; fourth, when it lasted from 2 to 3 yrs; and the fifth group--hemodialysis lasted for more than 3 yrs.

[Reprocessing of capillary dialyzers].

Changes in biocompatibility parameters of the cuprophan membrane, used repeatedly after reprocessing, were assessed. It is demonstrated that when the dialyzer is applied for the second of third time, cuprophan membrane loses its ability to induce acute dialysis leucopenia, typical for first application. Repeatedly used dialyzers also failed to cause bone-marrow irritation, which at first use induced a release of juvenile neutrophils into the circulation.

[Activation of monocytes during hemodialysis].

The authors conducted a clinical study of the hypothesis of interleukin-1 regarded as one of the most important topics in the problem of biocompatibility of dialytic membranes. Hemodialyses (HD) were performed using different cellulose and synthetic membranes. During HD research was made into the kinetics of monocytes and lymphocytes, monocytic activation expressed by a stimulation index, and the deposition of blood elements on the membranes of parallel membrane dialysers.