Investigation on the ability of an ultrasound bubble detector to deliver size measurements of gaseous bubbles in fluid lines by using a glass bead model.

摘要: Detectors based on ultrasonic principles are today's state of the art devices to detect gaseous bubbles that may be present in extracorporeal circuits (ECC) for various reasons. Referring theoretical considerations and other studies, it also seems possible use this technology measure size detected bubbles, thus offering chance evaluate their potential hazardous effect if introduced into a patient's circulation. Based these considerations, commercially available ultrasound bubble detector has been developed by Hatteland Instrumentering, Norway, deliver measurements means supplementary software. This device consists an sensor can clamped onto ECC tubing, necessary electronic equipment amplify rectify received signals. It is supplemented software processes signals presents them as specific data. On basis our knowledge experience with detection technology, we believe particularly difficult meet all requirements measurements, especially achieved using mathematical procedure rather than exact devices. Therefore, tried quality offered measuring sizes. After establishing standardized test stand, including roller pump temperature sensor, performed several sets experiments manufacturers program specifically designed at department purpose. The first set revealed manufacturer's recommended calibration material did not essential established authors. Having solved problem, could actually demonstrate field, generated detector, correctly calculated manufacturer. Simply, field having strongest reflecting region center, subsequently losing strength toward tubing's edge. following only does compensate field's inhomogeneity, but, furthermore, delivers results inappropriate applied material. In last experiments, were able recorded heavily depend upon circulating fluid's temperature, fact manufacturer address. impossible resolve related problems ever-increasing intervention. We more appropriate develop new kind device, free shortcomings. useful, because problem determining yet solved.