Tinnitus is a subjective sensation of sound without external stimulation. It has become ubiquitous and has therefore aroused much attention in recent years. According to the survey, ameliorating tinnitus based on special music and reducing pressure have good effects on the treatment of it. Meantime, vicious cycle chains between tinnitus and bad feelings have been broken. However, tinnitus therapy has been restricted by using looping music. Therefore, a method of generating fractal tones based on musical instrument digital interface (MIDI) technology and pink noise has been proposed in this paper. The experimental results showed that the fractal fragments were self-similar, incompletely reduplicate, and no sudden changes in pitches and would have a referential significance for tinnitus therapy.
Tinnitus is a common clinical symptom and its occurrence rate is high. It seriously affects life quality of the patients. Scientific researches show that listening some similar and none-repetitive music can relieve tinnitus to some extent. The overall music accorded with self-similarity character by the direct mapping method based on chaos. However, there were often the same tones continuous repeating a few times and tone mutations. To solve the problem, this paper proposes a new method for tinnitus rehabilitation sound synthesis based on pentatonic scale, chaos and musical instrument digital interface (MIDI). Experimental results showed that the tinnitus rehabilitation sounds were not only self-similar and incompletely reduplicate, but also no sudden changes. Thus, it has a referential significance for tinnitus treatment.
ObjectiveTo investigate the clinical characteristics and treatment to improve the prognosis of liver abscess after liver transplantation. MethodsEight cases of liver abscess after liver transplantation who were treated in our hospital from Apr. 1999 to Sep. 2013 were retrospectively analyzed, including clinical presentation, predisposing factors, treatment, and prognosis of outcomes. ResultsIn our group, the incidence of liver abscess after liver transplantation was 2.07% (8/387), and main predisposing factors included biliary complications, hepatic artery complications, and so on. The treatments included sensitive antibiotics therapy, reducing or deactivating immunosuppressant, aspiration and drainage of abscess by the ultrasound guiding, balloon valvuloplasty for biliary stenosis, percutaneous transhepatic cholangial drainage (PTCD), indwelling biliary stents, endoscopic nasobiliary drainage (ENBD), and hepatic resection. All of the 8 cases were followed-up for 3-59 months (median of 23 months), during the follow-up period, 4 cases were cured, 1 case improved, and 3 cases died. ConclusionsHepatic arterial and biliary complications are the most common predisposing factors for liver abscess after liver transplantation. Active prevention and treatment of biliary and hepatic arterial complications after liver transplantation are the key to reduce the occurrence of liver abscess and improve the prognosis of it.