Enhanced external counterpulsation Extemal counterpulsation （ECP） was originally conceived to be a circulatory assist device to promote blood flow to areas of the heart muscle that were lacking adequate blood suppl...Enhanced external counterpulsation Extemal counterpulsation （ECP） was originally conceived to be a circulatory assist device to promote blood flow to areas of the heart muscle that were lacking adequate blood supply due to obstruction of the coronary artery. During ECP the lower extremities are compressed to squeeze both arterial and venous blood back to the heart during diastole, increasing coronary perfusion pressure and right ventricular filling. The compression is released during systole,展开更多
There are four stages in medical device development.The beginning starts with some new understanding of physiological concepts which evolve into the formation of an innovative idea. The second stage is the technical d...There are four stages in medical device development.The beginning starts with some new understanding of physiological concepts which evolve into the formation of an innovative idea. The second stage is the technical development phase,from idea to the development of a design to technical reality. At this stage,capital funding and patent applications for the development are necessary but they are not considered here. The third stage is experimental and clinical studies,a data gathering phase to provide evidence of safety and effectiveness of the applications of the device.展开更多
文摘Enhanced external counterpulsation Extemal counterpulsation （ECP） was originally conceived to be a circulatory assist device to promote blood flow to areas of the heart muscle that were lacking adequate blood supply due to obstruction of the coronary artery. During ECP the lower extremities are compressed to squeeze both arterial and venous blood back to the heart during diastole, increasing coronary perfusion pressure and right ventricular filling. The compression is released during systole,
文摘There are four stages in medical device development.The beginning starts with some new understanding of physiological concepts which evolve into the formation of an innovative idea. The second stage is the technical development phase,from idea to the development of a design to technical reality. At this stage,capital funding and patent applications for the development are necessary but they are not considered here. The third stage is experimental and clinical studies,a data gathering phase to provide evidence of safety and effectiveness of the applications of the device.
