[Objective]To introduce the treatment and result of meniscal cyst by arthroscopic surgery.[Method]During the period between 1997 and 2005,20 patients suffered from meniscal cysts have been treated by arthroscopic surgery in Xijing Hospital.Meniscal cysts were excised in all cases with shaver under arthroscopic visualization,whereas outside-in suture repair of meniscus was undergone in 8 cases to close the lacuna and repair the meniscal peripheral free which were resulted from remoral of cyst.The patients were followed up from 3 to 42 months with an average of(18.7?12.2)months.The patients were assessed pre-and post-operatively by the Lysholm score and Glasgow Assessment.[Result]Sixteen of total 20 patients were followed up.Meniscal cyst recurred in a patient one year after operation.Lysholm score of the 16 patients showed a significant improvement from(71.2?8.7)pre-operation to(97.1?2.9)post-operation(t=32.948,P

[Objective]To report the treatment and outcome of treatment of discoid lateral meniscal tear by arthroscopic surgery.[Method]During the period between Jan.1999 and Jun.2005,77 patients suffered from discoid lateral meniscal tear have been treated by arthroscopic surgery in Xijing Hospital. The standard arthroscopic portals (anteromedial and anterolateral)were used.Lateral menisci were totally removed in the 21 patients (29.2%) of total 77 cases,whereas lateral menisci of 13 patients (18.1%) were removed partially and meniscus-plasty was applied in 38 patients (52.8%).Thirty-nine (54.2%) of 77 patients were males,and 33 (45.8%) females.Their average age was 29.4?10.9 years (range 8~51 year).Five patients were lost in follow-up.The mean follow-up period of the rest 72 patients was 26.2 ?9.3 months (range 12~44 months).The patients were assessed pre-operationally and post-operationally by the Lysholm score.Moreover,the results of Lysholm score were analyzed by student-t test.[Result]All patients had progress in pain,swelling,range of motion and knee function. No complication,which included intraarticular infection,iatrogenic injury,fibroarthritis or loss of range of motion,was found.Lysholm score was 66.8?5.2 in average (range from 50 to 78) before operation,whereas it improved to 96.4?3.6 in average (range from 85 to 100) after operation.According to student-t analysis,very significant statistical difference was found between the pre-operative and post-operative results (t=34.7,P

[Objective]To summarize the middle-term results of unicompartment knee arthroplasty(UKA),and postulate a new specific assessment score.[Method]From March 2004 to September 2006,unicompartment knee arthroplasty had been proformed in 22 patients(22 knees)with unicompartment osteoarthritis.The mean follow-up period was 34 months(range from 14 to 49 months).The HSS score、KSS score and WOMAC score were used to evaluate the outcomes of UKA at the time of preoperation and follow-up respectively.A new unicompartment knee arthroplasty specific score was postulated to evaluate the results of UKA.[Result]At the time of the final follow-up,pain relief was significant in all patients,and the range of motion and quality of living were improved.The HSS score,KSS score and WOMAC score were significantly improved compared with pre-operation(P

Objective To investigate the technique and efficacy of arthroscopic internal fixation of avulsion fracture of the anterior cruciate ligament(ACL) from the tibial eminence with stainless steel wire guided by meniscal stitching needle.Methods Fifteen cases of avulsion fracture of the ACL from the tibial eminence were treated by arthroscopic internal fixation with stainless steel wire guided by meniscal stitching needle from December 1999 to August 2005.The Lysholm scoring scale system was used to evaluate knee functions before and after surgery.Regular X-ray plain films at AP and lateral views were conducted to detect the bony healing of avulsed fragments.Results The operation was completed within 30 min.No complications of intraarticular infection,iatrogenic injury,fibroarthritis,or non-union of fracture were found.The 15 cases were followed for 6～54 months(mean,20.9?15.0 months).X-ray films revealed good bone union in all the 15 cases.The Lysholm scores were improved from 19.1?15.2(range,10～56) preoperatively to 97.5?3.7(range,91～100) postoperatively,with significant statistical difference by the student-t test(t=18.483,P=0.000).Wire breakage was found in 2 cases at 8 and 14 months after operation,respectively.But the bone union in the 2 cases was not affected.Conclusions Arthroscopic internal fixation with stainless steel wire guided by meniscal stitching needle in the treatment of avulsion fracture of the anterior cruciate ligament from the tibial eminence has advantages of simplicity,broad indications(from type Ⅱ to Ⅳ injuries),minimal invasion,and rapid postoperative recovery.

Objective To observe histologically the effect of exogenous application of bFGF (basic fibroblast growth factor) combined to freeze- dried tendon on angiogenic enhancement in early ACL (anterior cruciate ligament) reconstruction. Methods 14 dogs were used in the experiment. 100 ng/mL bFGF was combined to freeze- dried tendon and then transplanted into one side knee to substitute the original ACL, while only freeze- dried tendon was used in the transplantation at the other side as control. The ACLs were harvested each week from 1 to 6 weeks from the 14 dogs respectively. The histological observation with HE staining was done under microscope to mainly observe the angiogenesis in the transplanted ACL. Results Neovascularization occurred at 2nd to 3rd week and reached the peak at 4th to 5th week postoperatively at the experimental sides. By contrast, the neovascularization occurred at 4th to 5th week postoperatively at the control sides. Conclusion The time of neovascular formation and the depth of vascular penetration into the tendon in the group of bFGF combined to freeze- dried tendon are superior to those in the control group.

The incidence of stroke is increasing year by year,about 75％ of the patients with different levels of sequelae,and the age of onset also tends to be younger,to the community and the family to bring a heavy burden.Therefore,it is urgent to strengthen the study of the related risk factors of stroke in young people,so as to reduce the incidence of stroke.Traditional recognized risk factors such as hypertension,diabetes,high cholesterol,heart disease,obesity,and smoking can explain part of the stroke events,of these risk factors intervention treatment significantly reduced the incidence and mortality of stroke.However,cardio cerebral vascular system is not fully protected.In view of the biochemical indexes of blood of patients with specimens by convenience,detection index simple and precise,further studies of the relationship between biochemical risk factors and young stroke has made clear the necessity of and have become major challenges in current epidemiological study of cerebral stroke.

Objective To discuss the mechanism about exercise preconditioning (EP) protected myocardium by means of regulate NLRP3 inflammasome signal pathways on exhausted exercise rats. Methods The male Sprague-Dawley (SD) rats were randomly divided into four groups: normal control group (C group), no EP on exhausted exercise group (EE group), 3dEP + EE group, and 3wEP + EE group, with 12 rats in each group. In C group and EE group, the rats had not done exercise, while EE group took an exhausted swimming exercise with 3% heavy weight on tail at the end of 3 weeks; 3dEP + EE group and 3wEP + EE group exercised according to the standard of swimming for 60 minutes every day (swam 15 minutes, took a rest for 5 minutes, repeated 3 times), 6 days in a week, and were trained for 3 days and 3 weeks respectively, and took an exhausted swimming exercise on the last day. A light microscope and electron microscope were used to observe the myocardial histopathology and ultrastructure change, and enzyme linked immunosorbent assay (ELISA) was used to detect the levels of serum interleukin (IL-1β, IL-18, IL-6), hypersensitive C-reactive protein (hs-CRP), MB isoenzyme of creatine kinase (CK-MB), and brain natriuretic peptide (BNP). The protein expressions of NLRP3 and caspase-1 were detected by Western Blot. The correlations among all the parameters were analyzed by Pearson correlation analysis. Results Under the light microscope and electron microscope, the myocardial fiber morphological structure was normal, neatly, and no interstitial edema, muscle membrane damage or myocardial cell swellen was found in C group. In EE group, heart tissues were stained obviously uneven, a large number of myocardial fibers were fractured and messed, interstitial fibers were hyperplasiaed and edema moderately, much of myocardial cells were edema and necrosis, inflammatory cells were infiltrated, the number of average infiltration inflammatory cells was highest, mitochondria were edema seriously, part of the crest and a small number of membrane were blended together, fuzzy and crest were fractured, sarcomere were disordered; 3dEP + EE group and 3wEP + EE group heart tissues injuries were obviously alleviated, among the three groups, and the best results were in 3wEP + EE group. Compared with C group, the serum contents of IL-1β, IL-18, IL-6, hs-CRP, CK-MB, BNP and heart tissues protein expressions of NLRP3 and caspase-1 in EE group were significantly increased [IL-1β (μg/L): 18.77±1.28 vs. 12.00±1.55, IL-18 (μg/L): 236.79±15.73 vs. 150.74±7.09, IL-6 (μg/L): 59.31±9.17 vs. 34.65±2.89, hs-CRP (mg/L): 469.37±137.73 vs. 107.15±14.22, CK-MB (U/L): 15.57±0.91 vs. 7.40±0.40, BNP (ng/L): 532.08±63.44 vs. 386.96±34.77, NLRP3 protein (gray value): 0.66±0.07 vs. 0.16±0.06, caspase-1 protein (gray value): 0.96±0.08 vs. 0.48±0.06, all P < 0.01]. Compared with EE group, the above indicators in 3dEP + EE group and 3wEP + EE group were remarkably decreased, each index in 3wEP + EE group was lower than that in 3dEP + EE group except BNP [IL-1β (μg/L): 14.26±1.42 vs. 16.57±1.81, IL-18 (μg/L): 168.49±7.05 vs. 191.92±14.16, IL-6 (μg/L): 32.62±3.81 vs. 45.61±6.20, hs-CRP (mg/L): 207.06±41.68 vs. 339.56±89.65, CK-MB (U/L): 9.97±1.08 vs. 13.10±0.78, NLRP3 protein (gray value): 0.33±0.07 vs. 0.48±0.06, caspase-1 protein (gray value): 0.65±0.06 vs. 0.79±0.02, all P < 0.01; BNP (ng/L): 432.53±32.03 vs. 478.46±44.79, P > 0.05]. A positive correlation was shown among IL-1β, IL-18, IL-6, hs-CRP, BNP, CK-MB, NLRP3, and caspase-1 (all P < 0.01). Conclusions EP can reduce inflammatory reaction by regulating the NLRP3 inflammatory signal pathways, and protect the myocardial injury. The protection of the heart by long-term EP is more obvious than that of short-term EP.

[Summary] This paper reported a case of 4-year-old boy suffered with medial meniscus tear treated by arthroscopic repair in our hospital.After the boy injured his knee , plaster was applied for 4 weeks.Without any symptomatic progress , he was hospitalized with the diagnosis of medial meniscus tear .We performed arthroscopic meniscus repair , using 4.0-mm arthroscopy.At 3-month follow-up, the boy could full-bearing walk with no pain or discomfort , with a range of motion of 0°-135°.The post-operational MRI at the fourth month showed preliminary healing of repaired meniscus .We believe that regular arthroscopic instruments can accomplish meniscus repair in young children .

Objective To analyze the clinical and laboratory features of acute pulmonary embolism for diagnosis as possible as early.Methods For 15 patients of pulmonary embolism,who have not history of heart-lung disease and have been diagnosed by high speed multislice CT, the clinical and other laboratory data of these patients were retrospectively analyzed.Results The clinical manifestations were dyspnea ,chest distress, palpitation;the signs including tachypnea, systole murmur, tachycardia etc. The examinations were mainly color Dopple echocardiography and blood gas analysis. In some cases of embolism were found in their pulmonary artery; in all cases tricuspid regurgitation were found by color Dopple echocardiography and their pulmonary systole pressure were all over normal value(42～76mmHg).The blood gas analysis showed that PaO 2 was obviously lower than normal value(30～65mmHg).Conclusions The patient who has symptoms of dyspnea and palpitation must be examined by high speed multislice CT , color Dopple echocardiography and other measurements to get an immediate diagnosis . The first choice is color Dopple echocardiography when there is no high speed multislice CT. The patients can get exact diagnosis and prompt treatment by manifestation of pulse spectral of pulmonary artery, increase of pulmonary artery pressure, right ventricular enlargement.

OBJECTIVE:To evaluate the stability of tinidazole and cefotaxime sodium mixed in infusion fluid at 4℃,25℃ and 37℃ for 24 hours.METHODS:Tinidazole and cefotaxime sodium were determined by RP-HPLC method and the pH of solution was determined with a pH meter.RESULTS:There were no significant changes in pH of the solution at 4℃,25℃ and 37℃ for 24 hours; Along with the duration, there were significant changes in the appearance of solution and the concentrations of tinidazole and cefotaxime sodium.UV absorption curve of tinidazole and cefotaxime mixed solution revealed small changes at 4℃ for 6 hours, 25℃ for 2 hours and 37℃ for 1 hour, showing a new peak.CONCLUSION: Tinidazole and cefotaxime sodium mixed in infusion fluid were stable at 4℃ for 6 hours,25℃ for 2 hours and 37℃ for 1 hour.