Phase coupling analysis of gastric pressure activity via wavelet packet based diagonal slice spectra

Design and Evaluation of an Intelligent Artificial Anal Sphincter System Powered by an Adaptive Transcutaneous Energy Transfer System

“…The calibrated pressure range was set at 5 kPa separations from 90 kPa to 100 kPa, and 2 kPa separations from 100 kPa to 120 kPa. This pressure range was physiologically reasonable within the intestinal tract, and the resolution was sufficient for cuff control and defecation-sensation feedback (15).…”

“…In addition, respiratory movements, electronic noise, and different frequency rectal movements also increased the detection difficulty. In future work, groups of pressure data under normal physiological conditions will be recorded indirectly and regularly, and processed using pattern recognition algorithms to extract the most relevant parameters (15, 16). Furthermore, the biocompatibility of the AASS and the thermal effects of the TET coils on surrounding tissues need to be further studied in long-term animal experiments.…”

“…As shown in Figure 4A, for low-duty-cycle operation mode, intestinal pressure only needed to be sampled at a rate of 0.03 Hz. This sampling rate was more than adequate to measure motility signals that, in humans, lie in the long-time phase contraction ranging from 0.15 cycle per minute (cpm) to 2 cpm (0.003–0.03 Hz) (15). The microprocessor always runs in the sleeping mode and is awakened every 30 s by the WDT, thus, sequentially turning on and off the sample module circuit.…”

Study on reconstruction of rectal sensation based on wavelet packet analysis and SVM strategy

“…The WPA is an extension of wavelet transform that offers a more abundant signal analysis [12][13][14]. In wavelet transform, a signal is divided into an approximation and a detail.…”

Researches on Gastric Interdigestive Pressure Activity: Methods, Analysis and Interpretation

“…The GI motility recordings were acquired by using a telemetric capsule (see Figure . 2), invented in the past few years for diagnosing gastrointestinal functional diseases (Wang et al, 2005;Yan et al, 2006Yan et al, , 2008Yan et al, , 2010. The four main components of the diagnosis system were: 1) A capsule, which was the first component that performed data acquisition of physiological parameters like pressure within the gastrointestinal tract under the normal physiological conditions, sent the data wirelessly to the next component, i.e., the in-vitro pocket data recorder.…”