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The analysis included 46 patients (27 men and 19 women), aged 41 to 76 years, who required intensive medical care because of a grave clinical state. In all af them, as in a group of patients treated because of illnesses identical to those of the basic group but not requiring intensive medical care (CG), as well as in a reference group (RG)--blood donors, the determinations were conducted of the magnesium concentration in the serum with the flame atomic absorptive spectrometry method. It was confirmed that in the patients in grave clinical state the average concentration in the serum of that element was statistically significantly lower that in the other groups (CG and RG). The average magnesium concentration also differs statistically really between the CG and RG. A critical value was also determined of the magnesium concentration in the serum raising 5.78 micrograms/ml, which may be the prognosis of the metabolic disturbances leading to a grave clinical state.

The analysis included 80 patients (48 men and 32 women) aged 65 to 87 years, treated because of cancer of the stomach (34 causes) or of the large bowel (46 causes). In all the patients as well as in a control group made up of persons who were treated because of non-neoplastic diseases of the gastrointestinal tract the determinations were conducted of selected coagulological parameters: fibrinogen and D-dimer concentration, antithrombin III (AT III) activity, kaolin-cephalin index (APTT), prothrombin (PT), thrombin time (TT) and number of thrombocytes in the blood. The analysis of the results obtained showed that hemostasis disturbances of a chronic DIC character occur in 82.5% of persons of an advanced age ill with a cancer of the stomach or of the large bowel.

The study was carried out on 48 patients (26 male and 22 female), aged 52-76 diagnosed as having cancer metastases to the liver. The serum level of magnesium in the studied group and also in two other groups (the first consisting of 48 blood donors and the second of 50 patients suffering from cancer of a non-disseminated nature) was measured by the flame atomic absorption spectrophotometric method. The results of the study showed that cancer metastases to the liver significantly decrease the mean level of magnesium in serum compared to the other two groups. It was shown that a magnesium level below 12.76 micrograms/ml in cancer patients increased the risk of cancer metastases to the liver.

In a group of 112 patients aged 65 to 72 years with chronic gastritis (48 persons), a peptic ulcer (30 persons), a duodenal ulcer (34 persons) bacteriological examinations were conducted aiming at determining the sensitivity to antibiotics of Helicobacter pylori (H. pylori) strains isolated from the month (gingival pockets), the stomach or duodenal mucous, from stool samples and from the skin of the hands. The sensitivity to antibiotics was tested with the diffusive-disc method taking into consideration 23 chemotherapeutic agents. It was shown that with the use of single antibiotics the chance of efficiently elimination the H. pylori infection from the area of the whole alimentary canal (month, stomach, duodenum, large bowel) amounted to 14.3-35.7% depending on the chemotherapeutics used, where with the use of a two-medicine therapy (metronidazol + amoxycillin) it increased to 42.9%. This means that in people of an advanced age the chemotherapy carried out with the aim of liquidating the infection in the stomach or duodenum mucousa creates possibilities for the H. pylori infection to persist in other parts of the alimentary canal ranging from 64.3 to 85.7%. This way the patient treated may then undergo self-infection as well as be a source of infection for other persons.