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V Tessore

Publications and source records attributed to V Tessore.

6 recordsLinked to original sources
PubMed1975

Adsorption characteristics of cellulose acetate coated charcoals.

The permeability of cellulose triacetate membrane coated activated charcoal is enhanced by treatment with KOH. The adsorption data for creatinine in aqueous solution before and after deacetylation are given. In order to study the usefulness of hemoperfusion associated with dialysis for removal of uremic toxins, some experiments were performed on the adsorption by coated and deacetylated charcoal of molecules of various molecular weights (from 113 to 40,000). Although the adsorption capacity of uncoated charcoal was better, the coated material still shows good properties in the adsorption of glucagon (mol wt 3485). The results on in vitro experiments of vitamin B12 removal by coated charcoal cartridge and CDAK Model 3 dialyzer confirms the usefulness of adsorption technique toward medium molecular weight compounds.

Adsorption↗
PubMedDate not supplied

Hemodiafiltration without replacement fluid. An experimental study.

Paired filtration dialysis (PFD) is the only hemodiafiltration (HDF) technique in which the ultrafiltrate is continuously available but not mixed with the dialysate. As is the case during all convective or predominantly convective techniques, use of a replacement fluid is necessary in an amount equal to the difference between the ultrafiltrate and the desired patient weight loss. This replacement fluid must have an adequate electrolytic composition (Na+, Ca++, and buffer), and must be sterile and pyrogen free. Using an uncoated adsorbent charcoal cartridge (130 g), the ultrafiltrate obtained in PFD was regenerated, eliminating both the small (except for urea, glucose, and phosphates) and medium-to-large solutes but not the electrolytes and bicarbonate. This verified the ultrafiltrate's possible use as replacement fluid. This technique experimentally studied during 24 standard PFD sessions, with a total mean ultrafiltrate of 9,950 +/- 860 ml, allowed a replacement solution to be obtained with the following mean +/- SD composition: pH 7.467 +/- 0.122, HCO3- 27.0 +/- 2.12 mmol/L, Na+ 137.4 +/- 2.6 mmol/L, K+ 4.1 +/- 0.83 mmol/L, Ca++ 1.12 +/- 0.19 mmol/L, urea 68.3 +/- 16.2 mg/dl, creatinine 0.08 +/- 0.02 mg/dl, uric acid 0.05 mg/dl, phosphates 2.77 +/- 0.71 mg/dl, beta-2 microglobulin 0.5 +/- 0.4 mg/L, and atrial natriuretic peptide 4.41 +/- 5.6 pg/ml.(ABSTRACT TRUNCATED AT 250 WORDS)

Charcoal↗
PubMedDate not supplied

Evaluation of novel sorbent systems for joint hemodialysis and hemoperfusion.

Hemodialysis is not very effective at removing middle molecular weight species and certain drugs such as salicylates and barbiturates. Carbon hemoperfusion is ineffective in removing urea and water, even when coated microparticles can be generated. To use the advantages of hemodialysis and carbon hemoperfusion without their disadvantages, cuprophan tubular membranes and fibers containing activated carbon have been manufactured. A device called the Hemocarbodialyser, consisting of a sorbent and dialyzing carbon membrane wound onto a coli dialyzer, has been evaluated by the authors. From preliminary results, the Hemocarbodialyser has been shown to be efficient at removing vitamin B12, has high ultrafiltration, and has high dialysance of creatinine and uric acid. The use of activated carbon and aluminum oxide fibers was also evaluated, indicating that fibers containing sorbents, as well as the Hemocarbodialyser, may have clinical importance in the near future, when joint hemodialysis and hemoperfusion is required in hepatic failure, uremia, and acute poisoning.

Acute Kidney Injury↗