Piezoelectric Ultrasonic Transducer with High Performance OTFT for Flow Rate, Occlusion and Bubble Detection Portable Peritoneal Dialysis System

A piezoelectric ultrasonic transducer has been developed to detect flow rate, occlusion, and bubble formation in a portable peritoneal dialysis system.This transducer works by utilizing the piezoelectric effect to convert electrical energy into ultrasonic waves and detect the reflected waves through the tube wall.In addition, organic thin film transistors (OTFTs) were tested at annealing temperatures of 75 C, 100 C, and 125 C to evaluate the effect of temperature on mobility and on/off ratio.The best results were obtained at 100 C with a mobility of 0.816 cm 2 /Vs and an on/off ratio of 1.4 10 3 correlated with grain size.This study aims to report the fabrication process and initial characterization of the OTFT device as a first step towards the development of a portable biosensor that can be integrated into a point-of-care system.The transducer is designed for use in PeritoCare (Bangi, Malaysia), a portable peritoneal dialysis system developed by Universiti Kebangsaan Malaysia (UKM).The integration of piezoelectric transducers and OTFTs into the PeritoCare system enables the development of a more flexible, efficient, and mobile peritoneal dialysis system for young, active end-stage renal disease (ESRD) patients.