[Status of the immune system in acute gastrointestinal hemorrhages from chronic gastroduodenal ulcers].

Based on a comparative study of indices of the cell and humoral immunity in patients with different degree of blood loss in the posthemorrhagic and postoperative periods the author has established that they are characterized by a stable proportion of different populations of lymphocytes with the deficiency of immune competent cells and increased content of lymphocytes without T and B lymphocyte specific markers. The concentration of 3 main classes of immunoglobulins G, A and M is maintained within normal limits even at severe blood loss which discloses great compensatory abilities of the immune system.