20.500.12556/RUL-169337 Ocena tlaka v notranji jugularni veni na osnovi ultrazvočne meritve Estimation of pressure in the internal jugular vein based on an ultrasound examination Delo obravnava področje neinvazivnega ocenjevanja venskega tlaka. Tradicionalni postopki temeljijo na vizualni oceni višine meniskusa jugularne vene in zahtevajo medicinsko usposobljeno osebo, poleg tega pa so pogosto nepraktični in nezanesljivi. Predlagana je nova metoda, ki temelji na ultrazvočnih meritvah desnega predela vratu in omogoča numerično oceno venskega tlaka na osnovi pomerjenih pomikov ter sil, ki delujejo pri pritisku ultrazvočne sonde. Delo je strukturirano tako, da smo najprej pregledali anatomijo vratu, zlasti venske in arterijske strukture, ter okoliško mišično in vezivno tkivo. Na osnovi podatkov iz literature so bili določeni začetni mehanski parametri tkiv, ki so bili nato iterativno prilagojeni z namenom uskladitve numerične simulacije z eksperimentalnimi meritvami. Za validacijo pristopa smo izdelali fantomski model iz želatine, ki je omogočil primerjavo simulacijskih rezultatov z dejanskimi pomiki pri znanih obremenitvah. Rezultati kažejo, da je z ustrezno določenimi vhodnimi podatki in natančnim numeričnim modelom mogoče oceniti venski tlak na osnovi ultrazvočnih meritev, kar potrjuje uporabnost predlagane metode. The thesis addresses the field of non-invasive assessment of venous pressure. Traditional procedures are based on visual estimation of the height of the jugular vein meniscus and require a medically trained person, while often being impractical and unreliable. A new method is proposed, based on ultrasound measurements of the right side of the neck, which enables numerical estimation of venous pressure using the measured displacements and forces applied by the ultrasound probe. The work is structured in such a way that we first reviewed the anatomy of the neck, focusing on venous and arterial structures as well as the surrounding muscle and connective tissue. Based on data from the literature, initial mechanical parameters of the tissues were defined and then iteratively adjusted to align the numerical simulation with the experimental measurements. For validation of the approach, a gelatin-based phantom model was created, allowing comparison of the simulation results with actual displacements under known loads. The results show that, with appropriately defined input data and a sufficiently accurate numerical model, it is possible to estimate venous pressure based on ultrasound measurements, confirming the applicability of the proposed method. venski tlak ultrazvočna meritev mišica modul elastičnosti fantomski model simulacija venous pressure ultrasound measurement muscle elastic modulus phantom model simulation true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-05-24 07:30:09 2025-05-24 07:30:20 2026-05-26 08:25:51 0000-00-00 00:00:00 2025 0 0 XXIV, 81 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2027-05-22 620.179.16:616.12-008.34:519.876.5(043.2) 270655 240348931 38945.pdf 38945.pdf 1 1B5024900B56ABC0B040AD9A5E195B29 87780d98b4749c87a16a7ff0855d59d22e853f46fd840ce293fcae5e2954f4ff ebbd8b13-385e-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=210634 Fakulteta za strojništvo 0 0 0