Objective To compare the effects of speech recognition scores in young normal hearing adults using single-channel adaptive microphone and multi-channel microphone paradigm.Methods 30 normal hearing young adults,15 females and 15 males with a total of 60 ears were fitted binaurally with Diva 9(single-channel adaptive directional microphone mode)and Inteo 9(multi-channel adaptive directional microphone mode).The speech recognition scores were compared as a function of different signal to noise ratios in a diffuse environment.Results The SNR of L50 of single-channel adaptive directional microphone mode was 0.63 dB and that of multi-channel adaptive directional microphone mode was-4.63 dB.There was significant difference between the two microphone setups.Conclusion Multi-channel adaptive directional microphone mode can improve the speech recognition score in noise.

Mutations in isocitrate dehydrogenase are among the most common genetic alterations in intrahepatic cholangiocarcinoma (ICC).Mutant IDH proteins in ICC and other malignancies acquire an abnormal enzymatic activity, allowing the conversion of alpha-ketoglutarate (alphaKG) to 2-hydroxyglutarate (2HG), which inhibits the activity of multiple alphaKG-dependent dioxygenases, and results in alterations in cell differentiation and tumorigenesis.This review will focus on recent advances, which may help understand the function of IDH mutation in intrahepatic cholangiocarcinoma.

Animals ; Arrhythmias, Cardiac ; chemically induced ; prevention & control ; Cats ; Endothelin-1 ; adverse effects ; Medulla Oblongata ; drug effects ; Metoprolol ; pharmacology ; gamma-Aminobutyric Acid ; pharmacology

Objective To investigate the alterations of serological endothelin(ET) in patients with kawasaki disease(KD) and its relation with coronary dilatation(CAD).Methods Serological ET were measured in 50 cases of patients with KD in acute phase as well as subacute phase; 30 cases of patients with acute febrile infection(IC) in infective phases and 30 healthy children(HC).Results 1.ET in subacute phase significantly increased than that in acute phase.2.In both acute and subacute phases of KD, ET significantly elevated higher than that in HC; and ET in subacute phase significantly elevated than that of IC. 3. Fifty-four percentage patients with KD were complicated with CAD. For CAD subgroup, ET had no difference with CAD subgroup in subacute phase.Conclusion ET has still increases in subacute of KD,which indicates the relation with coronary artery lesion.

Objective To evaluate the clinical effects of emergency neoplasty on corneal penetrating injury. Methods A total of 102 cases of corneal penetrating injury were investigated.The patients underwent micro-trauma technique suture,optical iridectomy,extraction of anterior segment foreign bodies,nepheloid lens removal,and artificial lens implantation.The vision of pre-and post-surgery was compared and relationship between injury location and recovery was analyzed. Results The injury of cornea repaired completely 1 month after surgery.Cross infection was not found in the patients with one-year long follow-up(80% of all patients).The vision of all patients raised.The injury in center and nasal side affected vision significantly. Conclusion Timely surgery to corneal penetrating injury may be considered in order to improve the recovery of the traumatic eyes.

Object To explore the beneficial effect of phytoecdysone (EDS) on myocardial infarction and its mechanism of action Methods Rat myocardial infarction model was prepared by ligating the left anterior descending coronary artery, and EDS was injected ip for seven consecutive days Serum creatine phosphokinase (CPK) glutamic oxalacetic transaminase (GOT), lactic dehydrogenase (LDH) activities, infarct size(IS), coronary blood flow, capillary vessel density and vascular endothelial growth factor (VEGF) expression were determined Results 0 5, 5, and 50 mg/kg of phytoecdysone were able to effect the activities of serum CPK, GOT, LDH in a dose depending manner with an optimal effect for improving cardiac zymogram at the dose of 5 mg/kg ip At this dosage EDS can markedly reduce IS, increase coronary blood flow, capillary vessel density and the expression of VEGF Conclusion ESD can alleviate myocardial infarction symptoms The mechanism of such beneficial effect may due to its ability to promote VEGF expression regeneration of capillary vessels and increase coronary blood flow

Objective To evaluate the influence of duration of laser irradiation on histomorphometric meas- urements in experimentally tenotomized and repaired rabbit Achilles tendons and to explore the best irradiation time. Methods A total of 20 male New Zealand rabbits aged 10-12 weeks were used and randomly divided into 4 groups:a control group and three experimental groups.All the animals underwent surgical excised and then repair of their Achillis tendon.The animals in the control group were then treated with sham laser irradiation,while those in the three experimental groups were treated with 10,20 and 30 minutes of He-Ne laser irradiation(632.8 nm, 18.9 mW)daily,respectively,for 14 days.On the 28th day after surgical operation,the animals were sacrificed and their Achilles tendons were sampled.HE stain and Van Geison stain were used to observe morphometric changes of tendons.The SDS-PAGE electrophoresis method and CS-930 photodensity scan instrument were employed to measure the content of typesⅠandⅢcollagen.Results it was shown that laser irradiation enhanced cell proliferation,cel- lular content,granulation tissue formation and collagen deposition in laser-treated tendons,especially in those irradia- ted for 20 minute daily,as compared to the control group.TypeⅠand typeⅢcollagen levels were significantly in- creased at the 28th day in the healing tendons and the ratio of collagenⅢtoⅠincreased in all the 3 experimental groups,and the increase of both collagen content and ratio of collagen typeⅢtoⅠwas significantly greater in those ir- radiated 20 minutes daily(P

Objective To examine the expression of Toll-like receptor(TLR)4 protein and the transcription of TLR4 mRNA in the peripheral blood mononuclear cells(PBMC)from patients with hepatitis B virus(HBV)infection and explore the relationship between TLR4 and chronic HBV infec- tion.Methods The expression level and transcription level of TLR4 were determined by flow cytometre and reverse transcriptase polymerase chain reaction respectively in PBMC from 37 chronic hepatitis patients,28 liver cirrhosis patients,31 severe hepatitis patients and 27 healthy controls. Meanwhile,liver function,as well as blood routine test,prothrombin test activity(PTA)and HBV DNA was measured.Results The expression level and transcription level of TLR4 in patients were higher than those in healthy controls(P

Double Outlet Right Ventricle ; complications ; Female ; Humans ; Infant, Newborn ; Pentalogy of Cantrell ; diagnosis ; etiology

Pericellular matrix (PCM) is a narrow tissue region surrounding chondrocytes, which "chondron" with its enclosed cells. A number of studies suggested that PCM is rich in proteoglycans, collagen and fibronectin, and plays an important role in regulating microenvironment of chondrocytes. Direct measures of PCM properties through micropipette aspiration technique showed that PCM was different from mechanical property of chondrocytes and nature extracellular matrix. However, the function of PCM is not clear, and need further study.
Animals ; Biomechanical Phenomena ; Chondrocytes ; chemistry ; cytology ; metabolism ; Extracellular Matrix ; chemistry ; metabolism ; Humans