[Changes in the concentration of microelements in different body media during general anesthesia and surgery in patients with cancer of the stomach and esophagus].

Trace element (TE) content (zinc, copper, selenium, chromium) in different body media during surgery and anesthesia has been studied in 56 patients with esophageal and gastric cancer. It has been established that the components of modern analgesia have different effects on intra- and extracellular zinc, copper, selenium and chromium migration. Hexenal decreases TE blood plasma level and simultaneously increases their erythrocyte concentration. The administration of the first doses of depolarizing myorelaxants causes an increase in blood plasma and a decrease in erythrocyte zinc, copper, selenium and chromium content. Subsequent doses of depolarizing myorelaxants have no such effect. The most traumatic moment of the operation is accompanied by an increase in blood plasma and a decrease in erythrocyte TE content. Upon the operation and anesthesia the TE levels under study reach baseline values. In the first 24 hours after surgical intervention there is a decrease in TE erythrocyte concentration and an increase in their blood plasma and daily urine content.