Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: mucous membrane

Sortuj według:

Ogranicz wyniki do:

The method of evaluation of the abilities of the lining soft materials to relieve the mucous membran

Chladek G., Żmudzki J., Malara P.

Archives of Materials Science and Engineering

2013

Vol. 64, nr 2

125--134

Purpose: The presentation of a simple method of evaluation of the effectiveness to relieve the mucous membrane under thednture through soft lining materials, which is based on the analysis of creep curves and energy dissipated by the samples during the cyclic compression. Design/methodology/approach: On the testing machine there were conducted studies of time characteristics and there was determined the energy dissipated by the samples during the cyclic compression. The results were subjected to the analysis of variation ANOVA (α=0.05) with the Newman-Keuls post-hoc test. Findings: The presented method allowed to conduct the evaluation of abilities to relieve the mucous membrane of soft lining materials significantly different in hardness. The studies showed that the softer materials characterised with a greater ability to dissipate energy, nevertheless, after taking the load off, the return to the original form in case of materials with the lowest hardness lasted much longer. The samples of softer materials with large values of stress underwent much greater stiffening, Research limitations/implications: Limitations not allow the full translation of the obtained results into the expected results of clinical trials. The demonstrated relations between the behaviour of the samples and the hardness of materials are proper for the tested materials, but not necessarily for other materials of a similar hardness. Practical implications: The presented methodology of the research is even closer to the expected clinical reality, when the alveolar ridge is more uniform and flat, but in order to obtain an even fuller image of the situation in case of uneven or sharp alveolar ridges, one should conduct additional tests with the method consisting of the load of the samples with a properly shaped penetrator. Originality/value: The advantages of the presented methods are: the possibility for a quantitative use of the comparison of energy dissipated by the samples and the estimation of the material reaction while maintaining the possibility to use the tests of variable values of stresses, what enables an easy association of the obtained results with the values of stresses, which cause pain sensations in the mucous.

New egzoluminal circular surgical stapler

Drop R., Mazurkiewicz S., Woźny Z., Majcher P., Tabor A.

Acta of Bioengineering and Biomechanics

2010

Vol. 12, no. 3

113-117

The study presents the design, prototype version and preliminary results of in vivo testing of the egzoluminal circular surgical stapler for “end-to-end” anastomosis of bowels after the resection, where staples are put outside the intestinal lumen, and walls of the intestinal tube directly contact the intestinal mucous membrane. The adopted idea of an “end-to-end” intestinal anastomosis as well as a strong need for a device that would be re-usable have determined its specific design. The device is characterised by a kinematic mode of operation, different from the operating mode of commonly used staplers, and hence by a specific combination of the individual components. The in vivo tests, successfully conducted on animals, have proved that this method of anastomosis as well as the device used for its practical performance are fully applicable in clinical practice, as best shown by patent application No. P 386369.