[The effect of hyperbaric oxygenation on the urea content of the saliva in acute and chronic soft-tissue inflammation in the maxillofacial area]. / Vliianie giperbaricheskoi oksigenatsii na soderzhanie mocheviny v sliune pri ostrom i khronicheskom vospalenii miagkikh tkanei v cheliustno-litsevoi oblasti.

Urea levels were measured in the saliva of 30 patients with acute and chronic maxillofacial inflammation treated with multiple modalities including hyperbaric oxygenation (HBO). Urea concentrations were evaluated before, in the course of and after HBO session. A total of four 40-min sessions were made (1 session a day, 1.5 atm). Elevated concentrations of urea after HBO are thought adaptive, serving for elimination of ammonia overproduction in hyperoxia. Urea measurements in the saliva can be used for prediction of oxygen intoxication in the HBO-exposed patients.

[Equivalent dose of cosmic rays at representative points in models of the human body]. / Ekvivalentnaia doza kosmicheskikh luchei v predstavitelnykh tochkakh modelei tela cheloveka.

Equivalent doses of cosmic ray protons were studied in a wide range of spectra realized in solar cosmic rays and Earth radiation belts, for three standardized models of the human body. To solve this task, a problem was created for calculating the function of shielding of representative points within an anthropomorphic model. Equivalent dose values in various models were compared. It was shown that representative points of central nervous and hemopoietic systems in a spherical model of the human body did not yield coordinated values of equivalent dose as compared to stricter models. It is recommended to clarify the standard position of the mentioned points.

[Diagnosis of spherical shadows in the lungs]. / Diagnostika okruglykh tenei v legkikh.

From analysis of the results of scrupulous examination of 66 patients with pathological shadows up to 3 cm in diameter found in the lungs during X-ray examination the authors established that peripheral carcinoma of the lung accounts for 65.2% of all asymptomatic accidentally revealed structures in the lungs. Computerized tomography is a valuable method of differential diagnosis of small spherical shadows in the lungs, which also makes it possible to determine the spread of the disease during a single examination of the patient. The method of fine-needle aspiration biopsy under control of computerized tomography with subsequent cytological examination of the aspired material is simple, relatively safe, and highly informative in peripheral carcinoma of the lung. The method is of less diagnostic value in cases with benign structures in the lungs.