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Biomedical subjects

L G Rozenfel'd

Publications and source records attributed to L G Rozenfel'd.

At least 19 recordsLinked to original sources

[Stimulation of medical personnel work in operating rooms].

Preliminary results of experimental trial on stimulation of medical staff's labour in the operation unit, held in medical institutions of Chelyabinsk, has been analysed. As a basis for calculation of the payments for the work, the labour expenditures of each member of surgical team (surgeon, assistant, anesthesiologist, surgical nurse, anesthesist, litter bearer nurse) and the cost of 1 hour work were assessed, the degree of the difficulty of each operation, as well as the total cost of the procedure was determined. Registration of the work of all members of the surgical team and its payment, according to the quantity and the quality of the performed operations, demonstrates the stage of transition to the system of payment for the labour, i.e.--for the concrete work, done by somebody of the staff (for the treatment of some patient, etc.). The evaluation of the work according to the number of treated patients (operations being done) and to the quality of the treatment provides the conditions for personal financial incentive of surgical staff to intensification of their work and contributes to the achievements of favourable final results and in the same time--it provides decrease of the terms for patients' stay in the hospital, saving money and material resources.

Costs and Cost Analysis↗

[Minerals of biological origin: their structural formation and properties].

A study is presented of human tooth enamel and its changes during heating. The measurements were done by methods of electron paramagnetic resonance, roentgen structural analysis and gaseous chromatography. A new effect has been found related to changes of enamel structure during heating. It was established that at T 170 degrees C there occurs reorientation of the crystallites of hydrohylapatite that form the structure of tooth enamel as well as changes of the properties of organic layers between these crystallites. Discussed are the general principles determining the structure and properties of minerals of biological origin. It is shown that the organic structure of the biomineral effects the properties of inorganic crystallites by means of the spatial geometric factor. This factor is finally related to the fact, that superficial energy of the crystallite contributes essentially in its general energy. The authors discuss the obtained results from the viewpoint of diagnosis and new treatment methods of diseases related to the biomineral of the human body.

Crystallography↗

[The methodology of thermal diagnostic study].

The authors analyze existing methods of thermodiagnosis. They discuss the possible ways of increasing the independence of this method in informative valid diagnosis. It is recommended to carry out total thermographic examination of patients and the use of methods of active thermography.

Diagnosis, Differential↗

[Complex analysis of a sociological study of harmful habits among college students].

The paper provides a complex analysis of a socio-hygienic survey of harmful habits among college students in Ufa. 7093 students were surveyed by means of questionnaires. Anonymous questionnaire surveys permitted to reveal the subjective assessment of students health and its association with harmful habits. 21.1 percent of students suffer from chronic diseases, 49.4 percent of students systematically drink, 9.8 percent use drugs, 14.9 percent of students take drugs to keep fit, 24.2 percent of students systematically smoke.

Adolescent↗

[Assessment by industrial workers of their satisfaction with medical care].

A total of 1252 workers from 21 enterprises were surveyed by means of questionnaires. The survey uncovered grave shortcomings in the delivery of medical care at all levels. In particular, only 58.2 per cent of the interviewed were satisfied with the work of feldshers providing medical care at health posts. An analysis was also made of workers' suggestions regarding the work of shop physicians, chiefs of health units, administration, public organisations at enterprises and their working collectives.

Allied Health Personnel↗

[Morphohistochemical and electron microscopic characteristics of malignant tumors of the upper respiratory tract after combined local hyperthermia and radiotherapy].

The paper discusses morphohistochemical and electron microscopic characteristics of 15 primary tumors of the upper respiratory tract removed following preoperative irradiation in combination with local hyperthermia as a radio-modifying factor. Eighteen tumors removed after irradiation alone served as controls. Application of local microwave hyperthermia resulted in a higher degree of irreversible tumor cell dystrophia and damage. Hyperthermia--induced damage included disorders in ultrastructure of intracellular membranes and cell organelles mainly due to derangement of membrane--binding proteins, protein--lipid and nucleotide complexes. Thermoradiotherapy stimulated protective reaction of surrounding tissue which took the form of increase in fraction of leukocytes and macrophages with high acid phosphatase level in areas of tumor cell damage.

Adult↗

[Terminology problems in medical thermography].

The paper is devoted to some problems of medico-technical terminology of clinical thermography. A short historical review of stages of the discovery of infrared rays and their medical application was given. An analysis of a number of terms is based on the rules of medical terminology and state standards. An obligatory use in literature of correct terms, mainly of the Greek and Latin origin, is proposed. Commonly used terms on the basis of modern anatomical terminology are recommended for thermogram description.

Humans↗

[Local hyperthermia and hyperglycemia in ORL oncology].

Two-year experience of radiotherapy combined with local hyperthermia, hyperglycemia and chemotherapeutic drugs in patients with tumors of the upper respiratory tract showed advantages of this method. The results were compared with those of the control group of patients on radiotherapy only. Three therapeutic schemes were employed. Hyperthermia was performed in 2 temperature regimens. Of chemotherapeutic drugs platidiam, methotrexate, 5-FU and vinblastine were used.

Animals↗

[Multifield local hyperthermia as a method for heating deeply located neck tissues].

Distribution of the thermal field in neck tissues in local SHF-hyperthermia is studied. The two-field method of irradiation permits a uniform heating of more deeply located layers of the tissue due to summation of the radiant energy. So, the contact method of irradiation using "Luch-2" and "Luch-3" sets permits elevating the temperature inside the larynx up to 41-41.5 degrees C and maintaining it under given conditions for 25-30 min, but the heat loading on the skin and subcutaneous fat remains high. When using noncontact irradiators and "Parus" set the deeply located neck tissues are heated to 42-43 degrees C, the temperature of surface layers not exceeding 41-42 degrees C. This temperature rate is possible to be maintained for 25 min; its prolongation induces a sharp rise in the temperature of surface layers. Long-term SHF-hyperthermia of deeply located neck tumours necessitates cooling of the integument surface.

Animals↗

[Radiation therapy with local UHF hyperthermia in the late stages of laryngeal cancer].

Altogether 47 patients with advanced laryngeal and laryngopharyngeal tumors were treated. Twenty-six patients received multimodality therapy including local UHF-hyperthermia and gamma-beam therapy; 21 patients receiving radiotherapy only were entered in the control group. Hyperthermia was induced by the electromagnetic field with the frequency of 2450 and 915 MHz. Parus and Plot units were used. External irradiation was provided. Clinically, complete primary tumor regression was achieved in 20 of 26 patients. A positive effect was absent in 3 cases when metastasis size was 10 X 12 X 8 cm. In the control group, clinically complete tumor regression was noted in 2 patients only. In 4 cases the effect was insignificant, in the rest of 15 cases various degrees of a decrease in tumor and metastasis sizes were revealed.

Combined Modality Therapy↗