TY - JFULL AU - Jia-Rong Yeh and Tzu-Yu Lin and Jiann-Shing Shieh and Yun Chen PY - 2007/10/ TI - Applying Similarity Theory and Hilbert Huang Transform for Estimating the Differences of Pig-s Blood Pressure Signals between Situations of Intestinal Artery Blocking and Unblocking T2 - International Journal of Mechanical and Mechatronics Engineering SP - 459 EP - 465 VL - 1 SN - 1307-6892 UR - https://publications.waset.org/pdf/11903 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 9, 2007 N2 - A mammal-s body can be seen as a blood vessel with complex tunnels. When heart pumps blood periodically, blood runs through blood vessels and rebounds from walls of blood vessels. Blood pressure signals can be measured with complex but periodic patterns. When an artery is clamped during a surgical operation, the spectrum of blood pressure signals will be different from that of normal situation. In this investigation, intestinal artery clamping operations were conducted to a pig for simulating the situation of intestinal blocking during a surgical operation. Similarity theory is a convenient and easy tool to prove that patterns of blood pressure signals of intestinal artery blocking and unblocking are surely different. And, the algorithm of Hilbert Huang Transform can be applied to extract the character parameters of blood pressure pattern. In conclusion, the patterns of blood pressure signals of two different situations, intestinal artery blocking and unblocking, can be distinguished by these character parameters defined in this paper. ER -