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The Expression of Imprinted Genes in Porcine Conceptus during Peri-implantation Development
Yeoung-Gyu Ko,Hwi Cheul Lee,Byoung Chul Yang,Seongsoo Hwang,Gi Sun 1m,Jae Seok Woo,Poongyeon Lee,Changyeon Cho,Sang Woo Kim,Sun Ho Choi 한국동물생명공학회(구 한국동물번식학회) 2010 Reproductive & developmental biology Vol.34 No.2
The Expression of Imprinted Genes in Porcine Conceptus during Peri-implantation Development
Yeoung-Gyu Ko,Hwi Cheul Lee,Byoung Chul Yang,Seongsoo Hwang,Gi Sun 1m,Jae Seok Woo,Poongyeon Lee,Changyeon Cho,Sang Woo Kim,Sun Ho Choi 한국동물번식학회 2010 Reproductive & Developmental Biology(Supplement) Vol.34 No.2s
Sound Analysis in an In Vitro Endotracheal Tube Model
( Young Sik Park ),( Young Wook Kee ),( Kwang Suk Park ),( Jin Woo Lee ),( Sang Min Lee ),( Jae Joon Yim ),( Chul Gyu Yoo ),( Young Whan Kim ),( Sung Koo Han ),( Seok Chul Yang1 ) 대한내과학회 2011 The Korean Journal of Internal Medicine Vol.26 No.4
Background/Aims: Complete endotracheal tube obstruction is a medical emergency, and partial occlusion causes increased breathing rates and failure to wean off mechanical ventilation. Partial occlusion may be underestimated due to the lack of proper detection methods. We tested whether the sound of an endotracheal tube could be used to detect an endotracheal tube obstruction using an in vitro model. Methods: An endotracheal tube was connected to a ventilator on one end and a test lung on the other. Sounds were recorded with a microphone located inside the endotracheal tube via a connector. During mechanical ventilation, we changed the endotracheal tube internal diameter from 5.0 to 8.0 mm and different grades of obstruction at different sites were used along the tube. Sound energy was compared among the different conditions. Results: The energy of endotracheal tube sounds was positively correlated with the internal diameter and negatively correlated with the degree of obstruction. The rate of decline in energy differed with obstruction location. When the obstruction was more distal, the rate of decline in endotracheal sound energy was more rapid. Conclusions: Changes in the sound of an endotracheal tube can be used to detect an obstruction. Further studies are needed for clinical application.