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Biomedical subjects

K Hajnis

Publications and source records attributed to K Hajnis.

At least 19 recordsLinked to original sources
PubMed1992

[Somatic development of Czech and Slovak children and adolescents in the 80s].

The paper introduces the new growth values of body height and body weight of the Czech and Slovak children and youth aging 1 1/2 to 18 years. The research was carry out during the 1987-1988 years on the whole territory of Czech and Slovak Federative Republic. It embraceds 47,099 probands. In comparison with the oldest and more new czech and slovak values the both characteristics in interpretation of long-termed and short-termed action of secular trend is percetible the further enlargement of the body height and body weight. In contrast to ancient is perceptible that the Slovak children in the present time are equal or higher from the Czech children. During the period of adolescence they are however exceed from the Czech probands. The like relation exists by the boys in the body weight. However, the Slovak girls are in mean lighter than the Czech girls already from 9 years of age. The counterpoise of body weight and eventual exceeding of Czech children theirs Slovak contemporaries can be possible originates with improve nutritional conditions of the Slovak populations in the antecendent periods after the Second World War. The mean intersexual differences on the end of adolescent period by both of our nationalities are 11-12 cm of body height and 12-13 kg of body weight.

Adolescent↗
PubMed1991

[Distribution of transverse dimensions of the patella in the adult population. Relation to the development of the patellar component in knee joint prosthesis].

The development and manufacture of the patellar component was associated with a more detailed osteometric investigation of the patella and evaluation of its range of sizes in our population. Evaluation of data 1042 probands (477 women, 565 men) proved: a) there are no significant lateral differences of transversal dimensions of the patella and femoral condyles; b) The mutual relationship of the above mentioned dimensions does not correlate, and thus no conclusions can be drawn from the transversal breadth of the condyles on the dimensions of the patella; c) The range of patellar diameters in the population is very wide, and to meet demands, it will be necessary to manufacture patellar components in cca five sizes.

Adolescent↗
PubMed1990

[Physical dimensions and skinfold thickness in childhood].

Five measurements of body circumferences were related to the results of determinations of the subcutaneous fat thickness using caliper measurements. The analysis of data obtained from 10,661 infants and children aged between 1.5 to 15 years do not show constant correlations of the parameters measured during the periods of childhood.

Adolescent↗
PubMed1988

[The capacity of the sphenoid sinus].

The self-solidifying resin Dentacryl was used for the casts of the sphenoidal sinus. The casts were removed from the bone and their volume was measured according to the degree of rising of water in a glass cylinder.

Acrylic Resins↗
PubMed1983

Ontogenetic development of skinfold thickness of the trunk in childhood and its relation to Rohrer's index.

The study was aimed at the investigation of the ontogenetic development of thickness of five skinfolds on the trunk in children ranging in age from 1 1/2 to 15 years in relation to Rohrer's index of body fullness. The studies which yielded the basic data were carried out in 1976-1978 on 10,661 children of both sexes (5,322 girls; 5,339 boys) from the whole territory of Czechoslovak Socialistic Republic. The studies yielded the following results: In the course of the early postnatal ontogenesis all five investigated skinfolds of the trunk showed on the average a slight decrease up to the age of three to five years. However, subsequently the thickness of all skinfolds increased, more markedly in girls than in boys. Throughout the investigated period the thickness of all investigated skinfolds remained larger in girls as compared to boys. This difference increased with increasing age. A more marked increase of mean skinfold thickness with increasing age due to the larger amount of subcutaneous fat was present in both sexes in abdominal regions and in in distal parts of the thorax as compared to its upper part, where the increase was more marked than in the subscapular region. The calculated mean values of Rohrer's index of body fullness were systematically decreasing in both sexes throughout the investigated period of life regardless of the development of the measured skinfold thickness. An exception formed the last two age groups of girls (13-14, 14-15 years of age), where, obviously with the onset of increasing total body weight, the calculated mean values showed again only a very slight increase. The actual differences of skinfold thickness and thus possibly also of the amount of subcutaneous fat between individual populations probably were due rather to social and economic factors. However, satisfactory nutrition was observed not only in highly developed, but also in some underdeveloped communities. However, it was not possible to exclude the influence of ethnical factors. This was confirmed by the comparison of our results with the data obtained in primitive rural populations as well as with those ascertained in highly developed countries in industrial populations.

Adolescent↗
PubMed1979

Relation to body fat to age in the Czech population.

Density and percentage of fat in the body were investigated in 403 females and 356 males of Czech population using hydrostatic weighing. The group was divided into four age subgroups ranging from 17 through 22, 23 through 29, 30 through 39 and 40 through 49 years. Fat values were found to increase with age, growing in females and males between the ages of 17 to 49 years from 27.1 to 35.4 and from 16.3 to 26%, respectively. In both sexes, the highest difference in the percentage of fat was observed between the second and third decennium. Body weight was also seen to increase with age up to 40 years of age. On the other hand, from 40 through 49 years a decrease in weight was seen both in male and female means, with the body heights also less in older subjects. The values observed, particularly in females, exceed those reported as a rule in other populations. This is accounted for by nutritional factors such as the amount of calories and composition of food and possibly also by the effect of the genetically given somatotype.

Adipose Tissue↗