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Micro-PIV Measurement of Abnormal Cardiac Outflow in a Hypothermic Chicken Embryo
Eunseop Yeom(염은섭),Kweon-Ho Nam(남권호),Hojin Ha(하호진),Sang-Joon Lee(이상준) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Blood in the outflow tract (OFT) of a chicken embryonic heart exhibits highly variable flow pattern depending on the change of heart shape during the variation of developmental stages and variation of environmental conditions. In this study, the pulsatile blood flow in the OFT of a chicken embryonic heart was investigated experimentally using a micro PIV technique. Microscopic images were consecutively captured from a chicken embryo at HH stage 17 (2.5 days of incubation) and stored for PIV analysis. Red blood cells (RBCs) were directly used as flow tracers. When the heart is exposed to room temperature, reflux occurs during the diastole. This results from the inharmonic heart movement under hypothermic condition and the undeveloped heart valve at this developmental stage. The peak velocity and heart rate are lower than those of normal embryonic heart. The comparative study on the blood flows in the OFT of a chicken embryonic heart for both normal and abnormal conditions would be helpful to understand the corresponding hemodynamic characteristics and develop a valveless biomimetic pump system.