20.500.12556/RUL-96633 Vpliv nogavic s keramičnimi mikrodelci na nizkofrekvenčno vsebino mikrocirkulacije Effect of socks with ceramic microparticles on low-frequency content of microcirculation Pri magistrski nalogi smo opazovali razliko v frekvenčni vsebini mikrocirkulacije v stopalu pri frekvencah nižjih od frekvence srčnega ritma (t.i. nizkofrekvenčna vsebina) in sicer med nogavicami izdelanimi iz materiala z vgrajenimi keramičnimi mikrodelci in nogavicami iz kontrolnega materiala brez keramičnih mikrodelcev. Osnova za magistrsko nalogo so bili podatki iz študije ki smo jo izvedli na Fakulteti za elektrotehniko Univerze v Ljubljani z naslovom »Vpliv nogavic z vgrajenimi keramičnimi mikrodelci na mikrocirkulacijo stopala« in je bila namenjena ugotavljanju obstoja objektivno merljive razlike v mikrocirkulaciji v stopalu z nogavico, ki vsebuje keramične mikrodelce in kontrolno nogavico. V študiji smo dejansko zaznali majhno toda statistično značilno razliko v mikrocirkulaciji kože, vendar mehanizem delovanja ni pojasnjen. V magistrski nalogi zato uporabimo enega od pristopov, s katerim bi lahko prispevali k razlagi možnih mehanizmov delovanja keramičnih mikrodelcev vgrajenih v tkanino in njihovega vpliva na mikrocirkulacijo. Meritve mikrocirkulacije smo izvedli z laser dopplerskim merilnikom pretoka krvi. Za nadaljnjo obdelavo signalov smo uporabili zvezno valčno transformacijo, ki omogoča opazovanje lastnosti signala hkrati v časovnem in frekvenčnem prostoru. Opazovali smo frekvenčno vsebino signalov v petih značilnih nizkofrekvenčnih pasovih, za katere so že pokazali, da vsebujejo pretežno prispevke petih različnih fizioloških mehanizmov uravnavanja lokalnega pretoka krvi. Čeprav smo v določenih primerih zaznali statistično značilne razlike med uporabljenimi materiali nogavic, pa te razlike niso bile konsistentne, zato z dobljenimi rezultati ne moremo dodatno razložiti ali podkrepiti ugotovljenih razlik iz omenjene študije. In the master's thesis, we observed the difference in the frequency content of microcirculation in the foot at frequencies lower than the frequency of heart rhythm (i.e., the low-frequency content), between socks made of material with built-in ceramic microparticles and socks from the control material without these microparticles. The basis for the master's thesis was the data from a study carried out at the Faculty of Electrical Engineering, University of Ljubljana, entitled »The effect of socks with built-in ceramic microparticles on the microcirculation of the foot« and was aimed at establishing the existence of an objectively measurable difference in microcirculation in the foot with a sock with build-in ceramic microparticles and a control sock. In the study, a small but statistically significant difference in skin microcirculation was observed, but the mechanism of action was not explained. In the master's thesis, therefore, we use one of the approaches that could contribute to the interpretation of possible mechanisms of functioning of ceramic microparticles embedded in the fabric and their impact on microcirculation. Microcirculation measurements were performed using a laser Doppler blood flow meter. For further processing of signals, a continuous wavelet transform was used, which allowed the observation of the signal characteristics simultaneously in the time and frequency domain. We observed the frequency content of the signals in five characteristic low frequency bands, which have already been shown to contain predominantly contributions of five different physiological mechanisms for regulating local blood flow. Even though we detected statistically significant differences between the used socks materials in certain cases, these differences were not consistent, therefore, with the results obtained, we cannot further explain or underline the observed differences from the aforementioned study. mikrocirkulacija laser doppler zvezna valčna transformacija keramični mikrodelci biokeramika microcirculation laser doppler continuous wavelet transform ceramic microparticles bioceramic true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2017-10-06 12:00:05 2017-10-06 12:00:09 2022-08-12 11:34:08 0000-00-00 00:00:00 2017 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 38721 Berdajs_Marko_-_Vpliv_nogavic_s_keramicnimi_mikrodelci_na_nizkofrekvencno_vsebino_mikrocirkulaci.pdf Berdajs_Marko_-_Vpliv_nogavic_s_keramicnimi_mikrodelci_na_nizkofrekvencno_vsebino_mikrocirkulaci.pdf 1 DF8A7C476DB8456C9671B0FE5A81D2B8 fa2693776c499003266eb947be8cf4dda75a36cd85f98ba4afe5eb221c0ffd10 f26ddc79-a1b3-11eb-a523-00155dcfd717 20.500.12556/rul/e23af93f-d59d-49e0-a034-c0ba2c7b0879 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=105355 Fakulteta za elektrotehniko 0 0 0