Objective:To compare the mid-to long-term clinical outcomes between suture anchor and simple suture for acute injury to lateral ankle ligament (cauda equina tear near the insertion).Methods:This retrospective study included 146 patients (professional and semi-professional athletes) who had been treated for acute injury to lateral ankle ligament (cauda equina tear near the insertion) at Department of Sports Medicine, The Third Hospital Affiliated to Peking University from June 2007 to May 2017.They were 101 males and 45 females, with an age of (27.1±10.3) years (from 12 to 62 years). Depending on ligament repair techniques, the patients were divided into a suture anchor group of 81 cases subjected to reconstruction of the torn ligament with a 1.8 mm suture anchor, and a simple suture group of 65 cases subjected to direct suture of the torn ligament with a braided thread. The 2 groups were compared in terms of visual analog scale (VAS) pain scores, American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot scores and Tegner scores at preoperation and the last follow-up, time and level of postoperative motion recovery, proportion of limited joint motion, incidence of re-sprain and patient satisfaction.Results:There was no significant difference in the preoperative general data between the 2 groups, showing they were comparable ( P>0.05). The mean follow-up duration was (46.1±14.1) months (from 36 to 132 months). The VAS pain score, AOFAS ankle-hindfoot score and Tegner score at the last follow-up were significantly improved than those before operation in all the patients ( P<0.05). Postoperatively, there was no significant difference between the 2 groups in VAS pain score, AOFAS ankle-hindfoot score, Tegner score, incidence of re-sprain or proportion of limited joint motion ( P> 0.05). The suture anchor group was significantly better than the simple suture group in the level of postoperative motion recovery (92%±13% versus 89%±13%) and time of postoperative motion recovery [(4.2±1.1) months versus (4.6±1.0) months] ( P<0.05). Conclusions:Ligament repair, either by suture anchor or by simple suture, is a reliable procedure for patients with high sports demands after severe acute injury to the lateral ankle ligament. Compared with simple suture, suture anchor may accelerate postoperative motion recovery to the pre-injury level.

Objective: To investigate clinical outcomes of modified reattachment of superior peroneal retinaculum (SPR) for patients with recurrent peroneal tendon dislocation. Methods: A total of 24 cases with recurrent peroneal tendon dislocation from December 2012 to June 2017 were treated with modified reattachment of SPR. There were 20 males and 4 females. The average age was 24.9±9.3 years (14-48 years). The average BMI was 23.18±3.50 kg/m² (15.8-32.2 kg/m²). A 4-5 cm incision was made along the lateral margin of the fibula and curved distally around the fibular tip in line with the peroneal excursion. The superior peroneal retinaculum, peroneus longus and peroneus brevis were exposed. The periosteum and SPR were stripped from the fibula. The false pouch was formed. Two suture anchors were inserted into the postero-lateral ridge of the lateral malleolus without damaging the cartilaginous ridge, after which the SPR was reattached to the lateral malleolus with the anchored suture. The inner layer of the false pouch was incised, while the outer layer (periosteum) was sutured with the SPR in a pants-over-vest style. The following items, including American Orthopaedic Foot and Ankle Society (AOFAS) score, visual analogue scale (VAS), rate of return to previous sports level, time to return to sports activity, complication, and patients satisfaction were evaluated preoperatively and at the final follow-up. Results: The average operation duration was 36.1±8.8 min (20-51 min). The blood loss was 1-10 ml, average 4.1±2.7 ml. The follow-up was carried out in 22 cases for mean 33.9±15.7 months (13-61 months). AOFAS score was improved from 77.8±7.8 points to 95.5±4.3 points significantly (t=-11.89, P<0.001). VAS score was reduced from 4.2±2.4 to 0.3±0.8 significantly (t=7.69, P<0.001). Mean duration return to sports activity was 5.0±1.9 months (3-10 months). A total of 20 patients (91%) returned to their previous sports level. Only one patient (5%) was found with limitation of range of motion, while two patients (9%) reported pain at the scar site without recurrence. The satisfaction rate was 91%. Conclusion Clinical outcomes of modified reattachment of SPR for patients with recurrent peroneal tendon dislocation was safe and effective.

Objective To understand the frequency distribution of CYP2C9 and VKORC1 gene single nucleotide polymor-phisms in Yunnan Han population.Methods CYP2C9(430C> T,1075A>C and 1080C> G)locus and VKORC1(-1639G> A and 1173C> T)locus gene polymorphisms in 202 samples were detected by adopting electrochemical gene sensor method,and the allele frequencies and genotype frequencies were performed the statistics and the gene polymorphism in relevant populations was an-alyzed.Results Among 202 samples,202 cases(100.0%)were genotype C/C at CYP2C9 * 2 locus,C allele frequency was 100.0%;185 cases(91.6%)were genotype A/A at CYP2C9*3 locus,15 cases(7.4%)were A/C genotype,2 cases(1.0%)were C/C genotype,A allele frequency was 95.3%,C allele frequency was 4.7%;CYP2C9*5 locus genotype C/C was in 202 cases (100.0%),C allele frequency was 100%;VKORC1 -1639G > A locus genotype A/A was in 145 cases(71.8%),57 cases (28.2%)were G/A genotype,A allele frequency was 85.9%,G was 14.1%;1173C> T locus genotype T/T was in 145 cases (71.8%),C/T gene type in 57 cases(28.2%),T allele frequency was 85.9%,and C was 14.1%.Conclusion The distribution of CYP2C9 gene in Yunnan Han population is similar to that in other regions of our country.The VKORC1 gene is different from the foreign population,Chinese Han nationality and partial minority nationalities.

Objective To explore the diagnostic value of MSCT in tumors of intra-abdominal cryptorchidism in children.Methods MSCT findings of 8 children with tumors of intra-abdominal cryptorchidism confirmed by surgery and pathology were analyzed retrospectively.Results Six tumors located in the right,2 (1 tumor of left cryptorchidism turned to the right abdominal) in the left.Eight children showed ovoid soft tissue tumor in abdomen.Three children displayed the long axis of the tumors consistent with regular descending course of embryonic testes.Six teratomas manifested as the cystic and solid mass with fat,calcification (ossification) insidey.Two yolk sac tumors manifested as the large cystic and solid mass with irregular necrosis and abundant tumor vessels.Conclusion The pathologic types of tumors for intra-abdominal cryptorchidism in children are different from adult.Most of them are teratomas or yolk sac tumors,and have some characteristics in MSCT.MSCT is helpful in diagnosis of tumor for intra-abdominal cryptorchidism with medical history.

[Summary] Ankle joint injury is one of the most common sports injuries , and some patients with chronic ankle instability need surgical treatment .Traditional incision surgeries are characterized with traumatic performance and high complication rates , and the exploration of the joint lesion is not comprehensive .With the development of minimally invasive surgery , the application of arthroscopy in the treatment of chronic ankle instability is increasing , which is conducive to the treatment of intra-articular lesions , while reducing the surgical trauma and improving the postoperative effects .In this paper , we summarized the current status of the application of arthroscopy in the surgery for chronic ankle instability from two aspects , which were arthroscopic surgery in the diagnosis and treatment of the disease, and total arthroscopic repair technology of ankle ligament .We also introduced domestic and overseas operation effects and new concepts .

Objective To verify and confirm the optical performance of the Olympus AU5400 Automatic Analyzer is satisfied for the professional requirements.Methods According to the Medical Standard of the People's Republic of China:Automatic chemistry analyzer(YY/T 0654-2008),the Analyzer Modular Ⅰand Ⅱ optical performance were measured to verify the stray light,the ab-sorption accuracy,linear range,stability and repeatability.Results The stray light absorption of tow modular was 4.789 4-5.158 9;The absorption accuracy of potassium dichromate standard solution (1-1)was (-0.002 1--0.024 7),and solution (1-2)was (-0.008 6--0.067 7);The D-value of stability that the highest absorption of standard solution (1-1)minus the lowest was 0.000 5-0.001 5;The CV% of repeatability for standard solution (1-2)was 0.02%-0.04%;Therof absorption linear was 0.999 6-0.999 9. Conclusion The optical performance of Olympus AU5400 Analyzer conforms to the standard of YY/T 0654-2008.

[ ABSTRACT] AIM: To investigate the underlying genetic changes of a Chinese patient with infantile malignant osteopetrosis ( IMO) .IMO is a monogenic disease, mostly caused by mutations of TCIRG1 and CLCN7 genes.The former is believed a homozygous gene and only cause the disease in homozygous or compound heterozygous status.However, it has been reported that heterozygous mutations also cause the disease in 6 non-Chinese cases.METHODS:Genomic DNA was extracted from peripheral blood of the patient and his parents.All exons and splice sites of TCIRG1 and CLCN7 genes were amplified by PCR followed by Sanger sequencing.Mutation detection in the 2 genes was also investigated in the parents. Haplotypes were constructed by variations obtained in mutation detection and microsatillites flanking TCIRG1 gene in the family by Cyrillic.Chromosomal microarray analysis ( CMA) was performed to detect copy number variations ( CNV) of the patient and his mother.RESULTS:A novel mutation c.449_452delAGAG ( p.Gln149Glnfs16) was detected in the pa-tient.This mutation truncated 666 amino acids at the C terminal of the V-ATPase 116 kD isoform a3 protein.It wiped out the entire ATPase V0 complex and was predicted to result in total loss of protein function.This mutation was also detected in the patient’ s father.No pathogenic mutation was detected in CLCN7 gene.CMA did not reveal any CNV involving TCIRG1 or CLCN7 gene.CONCLUSION:We reported a novel heterozygous mutation of TCIRG1 gene causing IMO.This represents the first IMO case in China caused by heterozygous TCIRG1 gene mutation.

Objective To analyze the precision and accuracy of the Olympus AU5421 automatic biochemical analyzer in order to verify the performance of this detection system declared by the manufacturer.Methods The Precision and Accuracy of User Au-thentication-Guide for Approval Second Edition(CLSI EP15-A2)was used to perform the routine detection on the Olympus AU5421 automatic biochemical analyzer.The systematic precision and accuracy were analyzed.Results Under this experiment condition,the precision and accuracy of the Olympus AU5421 automatic biochemical analyzer was consistent with the performance declared by the manufacturer.Conclusion The Olympus AU5421 automatic biochemical analyzer system has the high precision and good accuracy, and can be better applied in the clinical routine detection.

Objective To summarize the clinical experience of diagnosis and arthroscopic treatment of intratment of intra ular osteoid osteoma.Methods Seven patients(average 22.4 years old with range from 11～32 years)with intra-articular Osteoid osteoma who underwent arthroscopy treatment from March 2006 to June 2009 were studied respectively.Thin-section CT scanning was used to confirm diagnosis and determine surgery location.Results The time span between the appearance of clinical symptoms and confirmed diagnosis was 26.0 months on average(range from 18 to 36 months).At a mean 19-month follow-up,all patients showed significant improvements including VAS decrease,no recurrence,pain relief and normal range of motion.Conclusion The atypical clinical features and radiographic findings of osetoid osteoma might lead to the delayed diagnosis.Using arthroscopy to remove intro-articular osteoid ostema was a safe and effective way.

Objective To observe the effects of lycopene on fibrinolytic activity and nitric oxide in atherosclerosis rabbits. Methods 30 New Zealand rabbits were randomly divided into three groups. They were individually housed in metal cages. Throughout the experimental period, they were given restricted amounts of food. Control group was fed with normal diet,model group was fed with 1% cholesterol,10% lard and 89% normal diet, lycopene group was fed with 1% cholesterol,10% lard and normal diet plus 6% lycopene.At the time of the first day and the 8th week, blood samples were drawn from ear edge vein of rabbits. The activity and content of plashaa tissue type plasminogen activator(t-PA)and plasminogen activator inhibitor(PAI-1)were detected. The levels of serum Nitric oxide (NO)were determined.At the end of the study, the plaque areas were measured. SPSS 10.0 software was used to evaluate the differences among the three groups. Results Compared with control group, atherosclerosis rabbits had lower content and activity of t-PA, higher content and activity of PAI-1 and lower content of NO. Compared with model group, lycopene group had no significant difference about the content and activity of tPA and PAI-1.But lycopen increased the levels of serum NO, significantly diminished the area of lipid plaque. Conclusions The experimental results suggested that lycopene had antiatherogenic effects. The possible mechanisms might be that lycopene could decrease lipid peroxidation injure, maintain the concentration of NO and protect vascular endothelium. The antiatherogenic effects of lycopene had no correlation with the fibrinolytic activity.