[The ruptures of the trachea with the intubation tube in patients with esophagus cancer].

Postintubation tracheal ruptures is a rare but serious complication with high risk for the patient's life. The preliminary diagnosis is usually made after occurrence of subcutaneous emphysema, blood spitting, respiratory insufficiency, pneumothorax and/or pneumomediastinum. The suspected rupture of the trachea should be verified by fiber-optic bronchoscopy. The decision about necessity of surgical or conservative treatment is based on the compilation of clinical, radiologic and endoscopic data. We present 9 cases (7 women and 2 men) of postintubation tracheal ruptures, occurred during the esophageal (6), lung (2) and mammary gland (1) surgery.

Buckling of a single-layered graphene sheet on an initially strained InGaAs thin plate.

The elastic buckling behavior of a defect-free single-layered graphene sheet deposited on a strained InGaAs substrate is investigated. Such a buckled sandwich structure can be formed by local etching of an initially strained InGaAs substrate. We numerically investigated the necessary buckling conditions for a single-layered graphene sheet of circular geometry on an initially strained InGaAs thin plate. A criterion for buckling for various axisymmetric buckling shapes was obtained. It is shown that for a thin circular InGaAs plate with a monolayer graphene sheet of radius 80 nm and thickness 4 nm three axisymmetric buckling shapes can be obtained. For an initial value of the elastic deformation of the plate of 3%, the in-plane strain in graphene can reach a value of 1%. This deformation is shown to be distributed inhomogeneously along the radius of the graphene monolayer.

FEM/BEM for simulation of LSAW devices.

This paper presents a modeling of the propagation of surface acoustic, leaky acoustic, and surface skimming bulk waves in piezoelectrics with a finite array of metallic electrodes over their surface. A combined method of matrix Green's function and the finite element method for computation of all acoustic wave fields is an effective tool for simulation of the propagation of acoustic waves in such structures. The proposed method is optimized in the speed of computation of all matrix Green's function components originally obtained. The Fourier transformations of Green's function from kappa-space domain to real space domain are performed by combined trapezoidal and Filon's integration methods for rapidly oscillating functions. The trapezoidal integration method is used on a distance from a point source from zero to a few wavelengths long, but the other has the advantage for a distance from some wavelength to infinity. That allows one, by selectively condensing computation grids around branch and singular points of the sharp behavior of Green's function, to maximize speed and accuracy of computation of integrals. FEM is used, modified originally to achieve acceleration without loss accuracy. Because of the simple geometry of the electrodes, unknown elastic fields are presented as a series of known eigenfunctions with unknown coefficients over the whole region of electrodes. All unknown coefficients are determined by applying the Galerkin method. There is good agreement between numerical and experimental conductances of acoustic wave transducers on materials such as lithium niobate and lithium tantalate.

[Experience with glyciphonic ointment therapy for primary multiple basal cell carcinoma of the skin]. / Opyt lecheniia pervichno-mnozhestvennogo bazal'nokletochnogo raka kozhi glitsifonovoi maz'iu.

The effectiveness of glycifone ointment treatment for primary multiple basal cell carcinoma of the skin was evaluated in 28 patients. 27 cases were cured following one or two courses the duration of which was determined by the number of foci, pattern of tumor and its total surface area.

[Methods of spleno-pancreato-gastrectomy]. / O metodike splenopankreatogastréktomii.

The method of pancreatogastrectomy for carcinoma of the stomach is discussed on the basis of clinical experience (115 operations) and anatomical (192 anatomical specimens) and experimental (36 dogs) studies. The authors describe the techniques of the surgical approach reversible mobilization of organs, choice of the optimal level of pancreas resection with maintenance of adequate blood circulation in the stump, treatment of the stump by means of the round ligament of the liver, and drainage of the abdominal cavity. With the use of these techniques the mortality after this operation reduced from 20% to 8%.

[Splenopancreatogastrectomy in stomach cancer]. / O splenopankreatogastrektomii po povodu raka zheludka.

An experience with 115 splenopancreatogastrectomies is described. The general mortality was 20%. In the last series two patients died out of 24. To prevent necrosis of the pancreatic stump certain levels of amputation of the organ are recommended.