Biomedical subjects
Publications and source records attributed to P Strek.
22 patients with tumor of the parapharyngeal space were presented. Surgical treatment through external and internal approaches was performed. The options of the method of the treatment were discussed.
The aim of this study was to examine the tracheal vasculature in 5 month human foetuses, and to determine whether it differs from that previously described by other authors for adult human trachea. The vascular bed was visualized using the technique of corrosion casting and examined by scanning electron microscopy. The arrangement of larger vessels: longitudinal tracheo-oesophageal arteries and veins, as well as their segmental branches running circumferentially in the intercartilaginous spaces, was similar to that observed in the trachea of adults. However, no blood sinuses reported to occur in the submucous venular plexus of the human trachea could be found in the foetuses. It is postulated that the possible functions of such sinuses acting as the capacitance system are related to the functional respiratory tract; hence, this vascular specialization is not yet developed in the foetus.
OBJECTIVE: Microscopic investigation of the hyaloid vascular system in 5-month-old human fetuses. METHODS: Corrosion casting and light and scanning electron microscopy. RESULTS: The hyaloid artery ramifies into a tuft of vasa hyaloidea propria, which communicates with the posterior portion of the tunica vasculosa lentis, characterized by a network of anastomosing vessels. They further pass to the lateral portion of the tunica, acquiring a nonanastomosing palisadelike array and drain into the vessels of the ciliary processes or, after bending over the edge of the developing iris, drain into the outer choriocapillaris. The tunica vasculosa lentis vessels also communicate with the pupillary membrane, a system of vascular arcades arranged in several interconnected tiers, supplied by the terminal branches of the long posterior ciliary arteries. In tunica vasculosa lentis, arterioles seem to pass directly into veins, without forming a capillary bed. CONCLUSIONS: At the investigated developmental stage, the fully developed hyaloid system enters its subsequent involution, and the vessels nourishing the vitreous have already involuted. The system is generally similar to that observed in other mammals.
40 thyroid cartilages were used to investigations, they were taken from bodies of people, died between the ages of 19-99, by the use of the endurance machine with controlled speed of the increase of deformation. It was observed that the durability for flexion and the inflexibility of the investigated cartilages depends on the level of the process of their ossification, that is estimated by the help of the radiological index of the ossification (RIO). On the other hand, the searches of durability forcing of the regions of cartilages that presented different levels of the ossification process, proved the heterogenicity of the structure of the cartilage, in which ossified parts are separated by zones, that did not submit to this process.
The architecture of the cartilage already developed within ossified areas have shown apparent differences not only depending on their location within cartilage territory but also due to their chemical composition. The cartilage areas exhibiting a markedly advanced ossification process have shown rather high concentration level of Ca, P and Si.
Ten human vermiform appendices obtained from fetal corpses (160.0-240.0 mm of CRL) were examined using injection-micro corrosion method. Blood vascular bed reproduced with this method was observed with scanning electron microscope (SEM). Blood vascular bed structure of foetal appendix has been described, simultaneously with produced by them plexuses and organisation of microcirculation in a wall of the appendix. Collected results have been compared with data of other authors who conducted similar research on adult human appendices and appendices of several animal species.
Using cranial radiographs of 214 skulls representing white population, morphological features (size and shape) of the frontal sinuses were evaluated and compared with data on Eskimo and Indian series representing yellow population. In both populations, white and yellow, the sinuses are better developed and are usually larger in men than in women. The sinuses of smooth contour are usually smaller than those with serrated contour, and in case of the first ones, the left one is missing. Distinct racial, qualitative and quantitative differences occur in the presence and size of the frontal sinuses area.
BACKGROUND: Estrogens have not only direct and beneficial effect on relaxation of the arteries increasing the blood flow in the blood vessels, but also their level of secretion has considerable effect on synthesis of acetylcholine a neurotransmitter indispensable for appropriate functioning of the hearing organ. The aim of this study is analysis of the effect of hormones on the hearing organ in women who underwent surgical castration. MATERIAL: The study included 40 females, aged between 32 55 years who had undergone an operative treatment mainly because of uterine myoma. A group of 50 women aged between 32 50 years with appropriate hormone level comprised the control group. METHOD: Each woman investigated underwent the following examinations: gynaecological, otolaryngological and laboratory tests, such as: evaluation of levels of estradiol (E) and folliculin stimulating hormone (FSH). The assessment of hearing was carried out using tone and speech audiometry, tympanometry, test registration of auditory brain stem responses (ABR) and otoacoustic emissions (EOAE). The examinations mentioned above are performed in women as initial examinations before surgical treatment and as follow-up examinations 1, 3 and 12 months after the surgery. RESULTS: The results presented in this paper include initial examinations and follow-ups 3 months after the surgical treatment taking into consideration the correlation with the results of laboratory tests and the results obtained in the control group.