BOKERIYA, LEO ANTONOVICH,GORODKOV, ALEXANDR YURIEVICH,KIKNADZE, GENNADY IRAKLIEVICH
申请号：
EP07870603
公开号：
EP2186491A4
申请日:
2007.08.09
申请国别(地区):
EP
年份:
2012
代理人:
摘要：
The invention relates to clinical cardiology and cardiovascular surgery. The method for forming a blood flow in research stands and in surgically reconstructed segments of the blood circulation system comprises diagnosing the individual condition of a patients blood circulation system measuring the blood flow velocity field in the heart chambers and great vessels comparing the parameters measured against the physiological norm determining parameters forming a swirled blood flow and modeling an individual swirled blood current in the blood circulation system being diagnosed, the streamlined surfaces and guide elements of flow channels of the blood circulation system reconstructed being given shapes conforming to the flow lines of the restored normally swirled blood flow in accordance with formulas: Q t = z + Z 0 t 2 Õ = Õ 0 + k t �¢ z k t = “ 0 t / 4 �¢ ÀQ t �¢ C 0 t V z = 2 �¢ C 0 t �¢ z V r = - C 0 t �¢ r V Õ = “ 0 t 2 �¢ À r 1 - exp - C 0 t �¢ r 2 2 �¢ ½ wherein: V r , V z , and V Õ are the radial, longitudinal, and tangential velocities of the swirled current ½ is the kinematic viscosity of the medium Õ 0 is the initial swirling angle in relation to the flow axis normal Õ, z and r are current values of the angular, longitudinal, and radial coordinates along the flow line and Q(t), Z 0 (t), k(t), “ 0 (t), and C 0 (t) are parameters of the swirled blood flow variable over time because of the non-stationary current and corresponding to the individual normal indicators for a physiologically swirled blood flow. The normal indicators are established by routine examination of a representative sample of patients having no changes in the cardiovascular system. A vessel prosthesis comprises a tube having an internal surface in contact with the blood flow provided with a patter
