RESUMO
In the recent aging society, many strategies against cerebral diseases including dementia are needed.As hand massage treatments promote blood flow for muscle fatigue and other disorders, ultrasonic vibration may promote cerebral blood flow.A novel, long wavelength ultrasonic vibration device with high permeation (less than 30 kHz, 2 mW/cm2) was applied to investigate cerebral blood flow before and after the frontal or occipital trans-cranial irradiation. In this study, the frontal or a mixture of the frontal and the occipital irradiation were conducted respectively on Xe gas X-ray CT, and SPECT experiments in healthy adults who did not have any excluding criteria. From the results, we confirmed that the low mill watt ultrasonic vibration emitted by the device promoted cerebral blood flow.
RESUMO
Objective To establish an ultrasonic viscoelastic detection system to measure the viscoelasticity of in vitro tissues. Methods Based on the method of shear wave dispersion ultrasound vibration (SDUV), this system applied acoustic radiation force to excite harmonic vibration in soft tissues. The propagation of shear waves induced by the vibration was detected and the tissue viscoelasticity properties were calculated. The standard phantom and rat liver experiment were conducted using this system, and preliminary assessment of the system was completed. Results The measured result of standard phantom was close to the calibration value. The viscous and elastic coefficient of rat liver were (1.12±0.41) Pa•s and (0.81±0.40) kPa, respectively. Conclusions The results about the standard phantom and rat liver experiment approved feasibility of the system for viscoelasticity measurement on in vitro animal experiment, which is a preliminary exploration for the realization of liver fibrosis detection of human body.
RESUMO
Objective To investigate the cleaning effects of two different methods (modified ultrasound method VS traditional cleaning method) on endoscopy buttons,including suction button and water/gas injection button,and to provide effective clinical evidence for seeking better methods in cleaning endoscopy buttons.Methods A total of 200 endoscopy buttons were randomly divided into two groups:modified ultrasound cleaning group (experimental group) and traditional cleaning group (control group).The combination of multienzyme abluent and ultrasound vibration was applied to the experimental group and multienzyme abluent was used in the control group.ATP bioluminescence detection technology was applied to detect the residual status of organic substance and this parameter was used to evaluate the disinfection status of two different cleaning methods.Results The average organic substance residual was (217.0 ± 29.8) RLU and (42.74 ±8.6)RLU in control group and experimental group,respectively(P ＜0.01).The pass rates were 26％ (26/100) and 87％ (87/100) in in control group and experimental group respectively (P ＜ 0.01).Conclusion Modified ultrasound cleaning method combined with multienzyme abluent and ultrasound vibration has great cleaning effects on endoscopy buttons before disinfection.It can be regarded as a new method for cleaning endoscopy buttons.