Why blood is not flowing through the bypass? Physical laws conditioning flow in the bypasses Review article
Main Article Content
Abstract
Surgical coronary revascularization according to current guidelines is the best treatment in specific groups of patients with significant coronary artery disease. The main problem that is limiting long-term effect of coronary surgery is to maintain flow in bypasses. Blood flowing through the vessel is subject to different physical laws, such as: differential pressure, Hagen-Poiseuille, continuous flow or Bernoulli. On the basis of these rights are established guidelines for selection of patients for coronary bypass procedures. Understanding the rules governing the system of connected vessels, which is formed by the native coronary arteries and performed bypasses, is the key to knowing which patients would have greater benefit from surgery and in whom the patency of the bypass would remain longer.
Downloads
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright: © Medical Education sp. z o.o. This is an Open Access article distributed under the terms of the Attribution-NonCommercial 4.0 International (CC BY-NC 4.0). License (https://creativecommons.org/licenses/by-nc/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
Address reprint requests to: Medical Education, Marcin Kuźma (marcin.kuzma@mededu.pl)
References
2. Favaloro R.G.: Saphenous vein autograft replacement of severe segmental coronary artery occlusion: operative technique. Ann. Thorac. Surg. 1968; 5: 334-339.
3. Naunheim K.S., Barner H.B., Fiore A.C. et al.: 1990: Results of internal thoracic artery grafting over 15 years: single versus double grafts. 1992 update. Ann. Thorac. Surg. 1992; 53: 716-718.
4. Loop F.D.: Internal thoracic artery grafts. Biologically better coronary arteries. N. Engl. J. Med. 1996; 334: 263-265.
5. Zembala M., Tajstra M., Zembala M. et al.: Czy nadszedł już czas na rewaskularyzację hybrydową w wielonaczyniowej chorobie wieńcowej z udziałem kardiochirurga i kardiologa? Kardiologia Polska 2009; 67: 817-822.
6. Traczyk W., Trzebski A.: Fizjologia człowieka z elementami fizjologii stosowanej i klinicznej. Wydawnictwo Lekarskie PZWL, Warszawa 2001.
7. Wierzba T., Zdrojewski T., Narkiewicz K.: Czynniki kształtujące ciśnienie tętnicze. Część II. Zastosowanie niektórych praw fizycznych w hemodynamice układu krążenia. Nadciśnienie Tętnicze 2004; 8(1): 61-80.
8. Kąkol Z.: Fizyka. Wydawnictwo AGH – Wydział Fizyki i Informatyki Stosowanej Akademii Górniczo-Hutniczej, Kraków 2016.
9. Li J.K.: Laminar and turbulent flow in the mammalian aorta: Reynolds number. J. Theor. Biol. 1988; 135: 409-414.
10. Sobonkiewicz L., Filipczak G.: Wykorzystanie równania Hagena–Poiseuille’a do określania właściwości reologicznych zawiesin wysokoskoncentrowanych. Inż. Ap. Chem. 2015; 54(6): 356-357.
11. Sirs J.A.: The flow of human blood through capillary tubes. J. Physiol. 1991; 442: 569-583.