Objective To evaluate the effect of limited arthroscopic debridement under local anesthesia for knee osteoarthritis. Methods A retrospective analysis was made including a total of 63 patients (77 knees ) with knee osteoarthritis.There were 11 male and 52 female,with an average age of 56.5 years old(range from 38~71 years old).The limited arthroscopic debridement included removal of loose bodies hyperplastic synovum,degenerated cartilage and the injured meniscus.The average follow-up period was 2.1 years (from 6 month to 4 year).Outcomes were assessed by JOA knee function score and rate of satisfactory. Results During the follow-up,the patients showed significant improvement of knee function score from 41 point to 78 point.Clinical outcomes of 77 knees were excellent in 31 knee,good in 28 knee,fair in 12 knee,poor in 6 knee.The rate of good and excellent results was 76.6%. Conclusions Limited arthroscopic debridement under local anesthesia for knee osteoarthritis is a relative simple and effective method.It could alleviate pain and improve function of the paticents.

Objective To analyze the alterative characteristics of the extravascular lung water (EVLW ) in the patients with septic shock and clarify its value on the prognosis of these patients.Methods By the methods of retrospective analysis,according to the ultimate survival,21 patients with septic shock were divided into survivor group (10 cases) and non-survivor group (11 cases).The clinical features of the patients were observed and hemodynamic monitoring was made with PiCCO monitor.The EVLW was measured and the relationship between the EVLW and the prognosis of patients was analyzed.Results On the first,second and third day,EVLW was (12.7 ±1.8),(11.3 ±1.3),(10.1 ±1.3) ml/kg in survivor group,and (14.4 ± 1.0),(14.6 ± 1.4),(14.6 ±1.3) ml/kg in non-survivor group respectively,and there were statistical differences between two groups (P <0.05).However,on the second day after the intensive therapy,EVLW in survivor group dropped significantly(P＜0.05),but the non-survivor group only declined slightly,and compared with the result of the first day,there was no obvious difference (P >0.05).Conclusions The EVLW in the patients with septic shock increases significantly.The dynamic changes of the EVLW may be one of the factors for predicting the prognosis of patients with septic shock.

Objective To discuss the ultrasonic features and diagnostic value of high frequency ultrasound in the diagnosis of the injury of triangular fibrous cartilage complex (TFCC) of wrist joint.Methods The ultrasonic features of 32 patients with pathology confirmed unilateral TFCC injury were retrospectively analyzed.The preoperative MRI and ultrasound data were complete.The difference between the two methods in diagnosis of TFCC injury were contrasted.Results The major ultrasonic features of the injure of TFCC included form swelled,structures disorganized,inhomogeneous echoes,irregular echoless in damaged place.The flow signals could be displayed from the tear opening edge of the injured TFCC by CDFI.Among 32 cases of TFCC injury,there were 26 cases (26/32,81.25％) diagnosed by ultrasound and 27 cases (27/32,84.38％) diagnosed by MRI.There was no significant difference in the detection rate of the two methods for TFCC injury (x2 =0.143,P=0.706).Conclusion High frequency ultrasound can be used to diagnose the injury of TFCC accurately,and can provide imaging evidence simply and rapidly for clinical therapy.

The peacekeeping area in Sudan belongs to the tropical rain forest climate with heavy rain water and large air humidity. The power supply by diesel engine is unsteady. The peacekeeping persons will be replaced every 8 months because of the demand of peacekeeping mission. Because of the above reasons, the dental instruments are easily damaged. According to the above three characteristics, the dental chair and accessories, dental X-ray system and steam sterilizer are effectively maintained to guarantee dental medical treatments in peacekeeping operation in Sudan.

Objective To observe the bioeffects on the normal rats synovial with diagnostic ultrasound combined with different doses contrast medium. Methods Twenty normal cleaning level Wister rats were divided into 5 groups (each with 4 rats and 8 knees): ultrasound+100 μl contrast medium, ultrasound+200 μl contrast medium, ultrasound+300 μl contrast medium, ultrasound+500 μl contrast medium, a simple ultrasound irradiation (control group). Each group was irradiated with diagnostic ultrasound for 10 min. Rats were sacrificed after 1 week and joints synovial tissues were observed with pathological HE staining. Results In group ultrasound+100 μl contrast medium, ultrasound+200 μl contrast medium, ultrasound+300 μl contrast medium and control group, no significant damage in synovial tissues was found. In group ultrasound+500 μl contrast medium, synovial cells swelling, showing round, oval or polygonal, synovial tissues hyperplasia, arranged disorder, capillary proliferation, some muscle fiber structure dissolved fracture, inflammatory cell infiltration in the surrounding tissue were found. Conclusion Ultrasound combined with contrast medium can significantly enhance the bioeffects of synovial tissues, and the more the contrast medium doses, the more serious injury occurs in synovial tissues.

Objective To explore the feasibility of enhanced green fluorescent protein (EGFP) transfection into the joint synovial tissues of rheumatoid arthritis (RA) rats by ultrasound-mediated microbubble destruction.Methods Twenty-eight normal rats were established the RA rat model,four rats were control group,twenty-four rats were categorized into four experimental groups:EGFP,ultrasound +EGFP,microbubbles + EGFP,and ultrasound + microbubbles + EGFP.The last group was irradiated with ultrasound for 10 min after the mixture consisting of 300 μl Sono Vue and 10 μg EGFP was injected into the joint cavity.The rats were sacrificed after 3 days and the joint synovial tissues were collected for EGFP observation under fluorescence microscopy and quantitative analysis by real-time polymerase chain reaction (RT-PCR).Results Comparing with control group,EGFP expression was observed in the rat joint synovial tissues from all groups.However,a strong EGFP expression was observed in the ultrasound + microbubbles +EGFP group.EGFP expression had no statistically significant difference (the P values were 0.89,0.93,and 0.82,respectively,P ＞ 0.05) in the EGFP,ultrasound + EGFP and microbubbles + EGFP groups.However,EGFP expression in the EGFP,ultrasound + EGFP,microbubbles + EGFP groups significantly differed (all P values were ＜0.01) from that in the ultrasound + microbubbles + EGFP group.Conclusions Ultrasound-mediated microbubble destruction can improve EGFP transfection efficiency into the joint synovial tissues of RA rats.

Objective To evaluate the effect of ultrasound elastography and radiography in the assessment of hepatic fibrosis in chronic hepatitis B patients. Methods Seventy patients with chronic hepatitis B were en-rolled in our hospital from August 2014 to August 2016. Liver ultrasonography was performed in all patients. HAVTT1 and HAVTT2 were measured by visual method. SWV was measured by ultrasonic elasticity imaging. Re-sults With the increase of liver fibrosis,SWV test also increased,while HAVTT gradually shortened.The correct rates of HAVTT1 and HAVTT2 and SWV in the diagnosis of liver fibrosis were 72.36%,76.84% and 89.78%.The diagnostic accuracy of SWV was higher than that of HAVTT1 and HAVTT2,the difference was statistically sig-nificant(P<0.05).Conclusion Acoustic contrast measurement of HAVTT1 and HAVTT2 can reflect the chang-es of liver microcirculation,which is helpful to distinguish liver cirrhosis,fibrosis and no fibrosis. The measure-ment of SWV can reflect the difference of texture hardness of liver,which can be used as a kind of judgment on the degree and effect of hepatic fibrosis new method.

Total synthesis of cyclodepsipeptide Hikiamides A-C was described. Fragment convergent condensation method was applied for the preparation of Hikiamides A-C, starting from Commercially available amino acid such as L-N-Boc-Phe-OH, L-N-Boc-Trp-OH, L-N-Cbz-Van-OH etc. Tripeptide fragments(compounds 5a/5b)and dipeptide fragments(compounds 8a/8b)were first prepared. The subsequent condensation of the resulted two fragments provided protected linear pentapetides(compounds 9a/9b/9c); Finally, the linear pentapetide was cyclized by a mixed condensing agents comprised of PyBOP and HBTU. Hikiamides A-C was obtained with total yields of 9%, 11% and 6. 5%, respectively. Compared with the natural source, this method has the advantages of low cost, convenient operation and high yield, which effectively solves the problem of low isolated yield of Hikiamides A-C from Fusarium sp.

Dental pulp stem cells (DPSC) are pluripotent stem cells with high differentiation potential isolated from dental pulp. Using DPSC for vascular regeneration may be a good option. Hypoxia inducible factor-1α (HIF-1α) is an upstream gene of vascular endothelial growth factor (VEGF), and the small ubiquitin like protease 1 (SENP1) can reverse the small ubiquitin like (SUMO) modification of HIF-1α. Through the regulation of SENP1/HIF-1α, good vascular regeneration characteristics have been demonstrated in many in vitro and in vivo experiments. The SENP1/HIF-1α signaling axis has varying degrees of promoting and inhibiting effects on many solid tumors. Although there is relatively little literature on the role of the SENP1/HIF-1α signaling axis in dental pulp stem cells, it can be determined that SENP1/HIF-1α plays an important role in the angiogenesis of dental pulp stem cells. This article will elucidate the SENP1/HIF-1α signaling pathway and its mechanism of promoting vascular differentiation of DPSC.