Razvoj sistema za krmiljenje pretoka krvi v žilnem vsadku

Kirinčič, Mihael (author), Podržaj, Primož (mentor)

Dializa je postopek, pri katerem se zaradi okvarjenega delovanja ledvic poskuša s pomočjo dializnega aparata iz krvnega obtoka izločiti čim več odpadnih produktov metabolizma. Zaradi pogostega vbadanja z iglo in nizkega pretoka krvi se uporablja žilni vsadek, ki arterijo neposredno poveže z veno v roki. Zaradi tega se vena razširi. Vendar pa je ta razširitev zaželena le med dializo. V praksi se lahko vena trajno prekomerno razširi, kar povzroča težave. V diplomskem delu je predstavljena zasnova in izdelava koncepta krmilnega sistema, ki krmili odprtje žilnega vsadka. Potrebna je izbira ustreznega aktuatorja, konstruiranje in izdelava mehanizma s spremenljivim premerom, na katerega lahko aktuator deluje. Delovanje celotnega sistema pa se krmili s pomočjo mikrokrmilnika Arduino, ki omogoča brezžično komunikacijo s pametnim telefonom. Izdelana je bila tudi ustrezna aplikacija za mobilno napravo s programskim jezikom Xamarin/C#.

• Language: Slovenian
• Keywords: dializa, arteriovenska anastomoza, vsadek, krmiljenje pretoka, deformacija vsadka, PID krmiljenje
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [M. Kirinčič]
• Year: 2021
• Number of pages: XXIV, 70 str.
• PID: 20.500.12556/RUL-126891
• UDC: 004.312:681.5:616-089.86(043.2)
• COBISS.SI-ID: 64112387
• Publication date in RUL: 08.05.2021

Secondary language

• Language: English
• Title: Development of a vascular graft blood flow control system

Abstract

Dialysis is a procedure that filters as much waste products of metabolism as possible, due to kidney disease. Because of repeatable use of syringes and low blood flow of the blood vessels, an arteriovenous access is created. Because of this, the vein increases in its diameter, which is wanted only during dialysis. In practice, the diameter of the vein can increase dramatically, which is the main problem. In this thesis, the development of a control system concept for controlling blood flow of an arteriovenous graft is demonstrated. For the development, the correct linear actuator with an adjustable stroke is needed. Furthermore, a mechanism for squeezing the graft needs to be created and analyzed. The whole system is controlled by an Arduino microcontroller, that supports wireless communication. Furthermore, an application for a mobile phone was created with Xamarin/C# programming language.

• Keywords: dialysis, Arteriovenous anastomosis, graft, flow control, graft deformation, PID control