The role of voice rest after micro-laryngeal surgery for benign vocal fold lesions.

Purpose: To compare post-operative vocal outcomes of a voice rest regimen versus no voice restrictions following micro-laryngeal surgery for benign glottic lesions.

Methods: This was a combined prospective and retrospective cohort study on 167 patients who underwent micro-laryngeal surgery for benign focal fold lesion removal. Participants were divided into two regimens: standard voice rest (n = 92) or no voice restriction (n = 75).

New functional material: spark plasma sintered Si/SiO nanoparticles - fabrication and properties.

A bulk nanostructured material based on oxidized silicon nanopowder was fabricated using a spark plasma sintering technique. Structural investigations revealed that this material has the composition of ∼14 nm core Si granules inside an SiO shell. Photoluminescence measurements have shown that the emission spectra lie in the energy range of 0.

Adverse Events and Time to Diagnosis of In-Office Laryngeal Biopsy Procedures.

Objective To examine the adverse events and time to diagnosis of in-office laryngeal biopsy (IOB) procedures. Study Design Retrospective cohort study. Setting Outpatient clinic-tertiary referral medical center.

Clinical value of antistreptolysin O levels in adult patients with tonsillitis: report I.

To assess the clinical value of antistreptolysin O (ASO) level in adult patients with acute tonsillitis of group A beta-hemolytic streptococcus (GABHS) etiology and its interaction with the Centor score and throat cultures data. ASO antibody titers and throat cultures were obtained from 260 adult patients with acute tonsillitis of GABHS etiology initially proven by the Centor score. The results were compared with the group of 100 adult patients with recurrent tonsillitis who underwent tonsillectomy and with the group of 100 healthy adults.

[Radionuclide diagnosis of upper urinary tract patency in patients with cancer of the cervix uteri ].

The experience with dynamic renal scintigraphy has shown its high informative value and safety in evaluating the degree of intrarenal urine outflow disorders. However, failure to make an objective assessment of ureteral patency considerably limits its study. The set of studies, which is given in this paper, is devoted to precisely this, highly urgent, problem.

[A model for the age-dependent dynamics of growth of terrestrial mammals].

Two hypothetical biological mechanisms were proposed that largely determine the dynamics of growth of overland mammals. The first mechanism is the maintenance of a spatial similarity of the anatomy of the organism during its growth, and the second is the maintenance of the stability of the internal environment of the organism. On the basis of the advanced hypothesis, a model of age-dependent dynamics of growth was constructed, and a differential equation describing the changes in the body mass with time was derived.

131I content in the human thyroid estimated from direct measurements of the inhabitants of Russian areas contaminated due to the Chernobyl accident.

The method of processing and the results of measurements of 131I content in the thyroids of Russian people performed in May-June 1986 are presented. The contribution of radiation from Cs radionuclides in the human body was taken into account in the processing of measurement data with an SRP-68-01 device. The greatest individual 131I content was found in the thyroids of inhabitants of the Bryansk region, up to 250-350 kBq, and in the Tula and Orel regions, up to 100 kBq.

[Energetic model for formation of cellular mass].

Based on the law of conservation of energy, a differential equation describing changes with time in the mass of a dividing cell was obtained. A mathematical expression for the greatest possible value of the mass of an infinitely long growing cell that does not enter the process of division was derived. This value depends on the correlation between the energy constants characterizing the rate of the entrance of substances into the cell and the expenditures for the transport of substances inside the cell.

[The limited value of non-linear inner space of gamma-chamber].

The main sources of an error resulting from the derivation of a matrix for correcting the space nonlinearity of a gamma--chamber. The maximum probability method was used to make a mathematical evaluation of the low bound of absolute space nonlinearity (ASNL). Recommendations are given how to choose the modes of measurements of and the methods of calculation of the matrix correction elements ensuring the required ASNL value.

[The use of radiodiagnostic apparatus as human radiation counters in large-scale radiation accidents].

The problem of dosimetry of internal irradiation necessitates the use of human radiation counters (HRC). A state system of radiation safety should be based on a HRC stock in case of large-scale radiation accidents. Radiodiagnostic units can run in the HRC mode therefore they must be considered as an active reserve widely spread throughout the country.

[The dynamics of the content of incorporated cesium radionuclides in the population of regions with an elevated background radiation].

The authors represent summarized data on the time course of incorporated Cs in the population of the Krasnogorsk District of Bryansk Province over the period of June 1986-July 1989. A RIKh-5M device used as a counter of human radiations, its technical data and calibration methods were described. A retrospective analysis has shown that the main accumulation of radionuclides occurred before May 15 1986.

[The use of a hybrid scanner as a human radiation counter].

The most promising devices of those for radionuclide diagnosis that can be used for control of nuclides incorporated in the human body during a radiation incident are hybrid scanners. The authors made the calibration of devices of this type to register a mixture of 137Cs and 134Cs. The minimum detected activity was 40 nCi.

[Economic criteria of comparing radionuclide diagnostic instruments].

Based on a number of general postulates a mathematical equation was derived for computing the economically justified unbalance of the prices of two different instruments for the same uses depending on concrete values of their main technical parameters. The approach thus elaborated can be used for an analysis of instruments for any uses including medical ones. The criterion suggested makes it possible as well to assess, from the economic standpoint, the efficacy of the technical servicing of the equipment.

[Methods for monitoring the integral nonuniformity of the response of a gamma-camera detector].

The paper is concerned with methods of monitoring of integral inhomogeneity (II) used in standards of international organizations and in recommendations of the IAAE. Quantitative analysis of errors at different stages of measurement and processing was performed. Statistical effects were investigated on a mathematical model of an absolutely homogeneous detector.