BACKGROUND:It has been proved clinically that adhesion of fibrous scar with the dura mater or nerve root after lumbar operation is an important factor for postoperative symptoms,such as postoperative pain and numbness. OBJECTIVE:To verify the inhibitory effect of autologous ligamentum flavum on the formation of epidural fibrous scar after lumbar surgery and explore the possible molecular biological mechanism. METHODS:Forty-eight Japanese white rabbits(6-8 months old)were randomly divided into three groups:a ligamentum flavum preservation group,a ligamentum flavum non-preservation group,and an autologous fat reposition group.A lumbar laminectomy model was established in all the three groups of rabbits,and rabbit epidural tissues were collected at 3 and 6 weeks after modeling.Hematoxylin-eosin staining was used to observe histological changes and the number and density of fibroblasts,VG staining was used to observe the percentage of collagen fiber area,and immunohistochemistry was used to observe the expression of transforming growth factor β1 and Smad3 proteins. RESULTS AND CONCLUSION:Hematoxylin-eosin staining results revealed that fibroblasts in the ligamentum flavum preservation group were few and loosely arranged,while the cells in the ligamentum flavum non-preservation and autologous fat reposition groups were more numerous and closely arranged.The number density of fibroblasts in the ligamentum flavum preservation group was lower than that in the ligamentum flavum non-preservation and autologous fat reposition groups at 3 and 6 weeks after surgery(P＜0.05);however,there was no significant difference between the latter two groups.VG staining results showed that the collagen fibers in the ligamentum flavum preservation group were sparse and distributed unevenly,while a lot of red collagen fibers were gathered in the ligamentum flavum non-preservation and autologous fat reposition groups.The area percentage of collagen fibers in the ligamentum flavum preservation group was lower than that in the ligamentum flavum non-preservation and autologous fat reposition groups at 3 and 6 weeks after surgery(P＜0.05),but there was no significant difference between the latter two groups.The results of immunohistochemistry showed that the degree of positive staining of retained histone the ligamentum flavum preservation group was significantly lower than that of the other two groups.The absorbance value of transforming growth factor β1 and Smad3 in the ligamentum flavum preservation group was significantly lower than that in the other two groups at 3 and 6 weeks after surgery(P＜0.05),but there was no significant difference between the latter two groups.To conclude,there are different degrees of epidural fibrous scar formation after lumbar surgery.If the ligamentum flavum is preserved,it can help to reduce the number of epidural fibroblasts as well as the formation of collagen fibers,thus reducing the adhesion of the fibrous scar tissue to the dural sac and nerve root.The mechanism is not only a purely mechanical blockade,but also to reduce the formation of epidural fibrous scar by interfering with the transforming growth factor β1/Smad3 signaling pathway.

Tiepishihu(Dendrobii officinalis Caulis)is a medicinal and food source herbal medicine with the effect of benefiting stomach and promoting fluid,nourishing Yin and clearing heat.It has rich chemical components and pharmacological activities,with anti-inflammatory,anti-bacterial,anti-oxidation,anti-tumor,immunomodulatory,blood press regulation,hypoglycemic effects.It is not only used as medicinal food and health care products,but also widely used in medicine,such as Shihu Yeguang Wan,Compound fresh dendrobium granules and other drugs,with high medicinal and economic value.This paper summarized the resource distribution,chemical composition,pharmacological activities,and medicine and food of Dendrobii officinalis Caulis,and analyzed its application status,laying a theoretical foundation for the sustainable development,medicinal and food homologous development and comprehensive utilization of Dendrobii officinalis Caulis.

One patient with chronic refractory wound in right lower leg was admitted to our department in June 2017, which experienced repeated ulceration for 4 years. On 4 days post admission, two bamboo sticks were taken out from the deep muscle of the right lower leg. The wound was repaired by perforator flap of posterior tibial artery in the right lower leg. The donor site was covered with split-thickness skin in the upper leg of the same side. On 7 days post operation, the flap and skin graft survived. During follow-up of 12 months, the flap had good appearance. This case suggests that the first thing for the treatment of chronic refractory wound is to find out the cause of wound.

OBJECTIVE: To establish a method for measuring the photoelectric performance index (luminance response characteristic and luminance tolerance) of medical electronic endoscope. METHODS: Based on the clinical application and product features of medical electronic endoscope, the umbrella grayscale test chart and the adjustable gray scale test chart are designed and made from two aspects of distribution and density differential. RESULTS: The influence of gray scale arrangement, background illumination intensity and illumination spectrum on photoelectric performance measurement of electronic endoscope is verified by test. CONCLUSIONS It is a reference for the design analysis, evaluation and modification of electronic endoscope product photoelectric part, whether it is suitable for fast detection of umbels and more accurate gray scale test chart.
Electronics, Medical ; Endoscopes ; Light ; Quality Control

ABSTRACT:Objective To study the expressions of C-Met and hepatocyte growth factor (HGF)in tongue squamous cell carcinoma and their clinical significance.Methods We analyzed 46 patients (the treatment group) with tongue squamous carcinoma and 27 patients (the control group)with benign tumor treated in our hospital between June 201 1 and May 2013.The expressions of C-Met and HGF were detected by immunohistochemistry. Results In the experimental group,C-Met negative expression rate was 21.7% (10/46),weak positive expression rate was 26.1% (12/46),and strong positive expression rate was 52.2% (24/46).The above expression rates were 77.8% (21/27),1 5.8% (5/27),and 3.7% (1/27)in the control group.The two groups differed significantly (P <0.001).In the experiment group,the negative expression of HGF protein was 1 7.4% (8/46 ),weak positive expression rate was 58.7% (27/46),and strong positive expression rate was 23.9% (1 1/46).The above expression rates in the control group was 63.0% (1 7/27 ),37.0% (10/27 ),and 0.0% (0/27 ).The two groups differed significantly (P <0.001).The expression of C-Met protein was significantly related to lymph node metastasis (P <0.05).The expression of HGF protein was significantly related to pathological grading and lymph node metastasis (P <0.05).Conclusion The expressions of C-Met and HGF in tongue squamous cell carcinoma are significantly higher.And the occurrence and development of tongue squamous cell carcinoma are closely related to the expressions of C-Met and HGF.

Objective To investigate the Effects of thyroxine on the level of serum homocysteine and urinary albumin excretion rate in elderly patients with early diabetic nephropathy and subclinical hypothyroidism.Methods Seventy-five patients with early diabetic nephropathy and subclinical hypothyroidism were randomly divided into levothyroxine treatment group and conventional treatment group.Urinary albumin excretion rate (UAER),serum levels of homocysteine,creatinine,and lipids were measured at both pre-and post-treatment of 48 weeks.Results After treatment,serum total cholesterol,low density lipoprotein-cholesterol,triglyceride,thyrotropin,homocysteine,UAER,and serum creatinine in the levothyroxine treatment group were significantly lower than those in the conventional treatment group [(-0.52 ± 0.12 vs 0.31 ± 0.40) mmol/L,(-0.33 ± 0.22 vs 0.24 ± 0.36) mmol/L,(-0.16±0.18 vs0.19±0.29)mmol/L,(-4.4 ± 1.2 vs 1.2 ±0.8)mIU/L,(-1.4 ±2.0 vs0.9± 1.0)mmol/L,(-13 ± 13 vs 10 ± 7) pg/ml,(-2 ± 2 vs 3 ± 2) μmoL/L,respectively,all P＜0.01].Conclusions Treatment with levothyroxine could significantly improve serum lipid profiles and reduce homocysteine,UAER,and creatinine,and exert a protective effect on the kidney in the elderly patients with early diabetic nephropathy and subclinical hypothyroidism.

Sixty patients with early diabetic nephropathy (DN) and normal blood pressure were randomly divided into telmisartan treatment and control groups.And the blood biochemical parameters,urinary albumin excretion rate (UAER),the serum levels of homocysteine (HCY) and transforming growth factor-β1 (TGF-β1) were measured at both pre- and post-treatment of 24 weeks.After treatment,the levels ofUAER,HCY [(61 ±26) vs.(98±38) mg/L,(11.70 ±2.86) vs.(14.4±2.8) μmol/L (P＜ 0.01 ) ]and homeostasis model of insulin resistance index,TGF-β1 [ ( 3.17 ± 0.66) vs.( 3.60 ± 0.87 ),(66 ± 14) vs.(77 ± 17 )U/L respectively (P ＜ 0.05 )]in the telmisartan group were significantly lower than those in the control group.It indicated that telmisartan could improve the insulin sensitivity,significantly decrease the serum levels of HCY and TGF-β1,reduce UAER and exert kidney protection effects in the patients with early DN.

Objective To observe the level changes of interleukin-15 (IL-15) and its role and clinical sig-nificance in severe type B hepatitis(HB). Methods IL-15 levels of 47 cases of severe HB and 20 cases of healthy subjects were detected by ELISA,meanwhile the alanine aminotransferase (ALT),total bilirubin (TBIL) and pro-thrombase activity (PTA) were measured as well. The correlation between IL-15 and ALT,TBIL and PTA were ana-lyzed. Results IL-15 in severe HB eases were higher than in control group [(18.9±7.5 ) ng/L vs. (5.9±2.0) ng/L,P <0.01] ,which was higher in death group than in survival group[(24.1±7.5) ng/L vs. (15.7±5.4) ng/L, P<0.01]. IL-15 level was decreasing with the improvement of general condition and liver function recovery. In addition, IL-15 in severe HB was positively correlated with TBIL (r=0.570,P<0.01) and negatively correlated with PTA(r=-0.529,P<0.01) but was not significantly correlated with ALT(r=0.099,P>0.05). Conclusion IL-15 may take part in the pathogenesis of severe HB ,which is consistent with disease condition and is closely re-lated to the improvement of disease. The detection of IL-15 may exert a predicting role in the prognosis of severe HB.

AIM: There is a controversial argument about the choice of total hip replacement (THR) and bipolar artificial femoral head replacement (FHR) for elderly patients with femoral neck fracture. This study was designed to explore the long-term biocompatibility and functional recovery of joints in patients over 70 years with femoral neck fracture by THR and bipolar artificial FHR. METHODS: Sixty patients with femoral neck fracture over 70 years were enrolled from the First Department of Bone and Joint Surgery in the First Hospital of Jilin University from January 2002 to December 2006. There were 21 cases (8 males and 13 females) receiving THR, with a mean age of (72.1?3.5) years, and 18 of them were complicated with internal diseases. While 39 cases (16 males and 23 females) received bipolar artificial FHR, their average ages was (75.1?6.4) years, and 35 of them were complicated with internal disease. ①Choice of artificial prosthesis: Sixteen prosthesis were produced by Germany Link Company and American Zimmer Company, 44 artificial joints were offered by Beijing Mengtaiyin Medical Instrument Co., Ltd. ②All the patients were operated by senior doctors who were qualified for post technique owing to more than 10-years working experience about artificial joints. ③The mean time of follow-ups for all patients was 37 months. The difference was compared in biocompatibility between materials and host, joint function, Harris scoring, time of operation, blood loss, time of hospitalization, cost of hospitalization and adverse effect. RESULTS: ①Comparison of biocompatibility: Two revisions for abrasion of acetabular wall were carried out 5 years after bipolar artificial FHR, and there was no infection of incision, dislocation of hip joint or loose of artificial joint in other patients of these two groups. ②Comparison of adverse effect: There was one patient with complications of pain and red swelling of hip in each group. No infection occurred around the prosthesis, and these two patients recovered after symptomatic treatment. ③Comparison of follow-ups for joint function: The average Harris scores was 89.8?8.6 in THR group and 72.7?9.5 in bipolar artificial FHR group, and there were significant differences in these two groups (P 0.05). ⑤Comparison of operation time and blood loss: The average operation time were (150.2?24.3) minutes in THR group and (105.8?22.1) minutes in bipolar artificial FHR group, with significant differences (P

BACKGROUND:In recent years,bone defect caused by tumor,trauma,infection and so on is always the troublesome problem in the orthopaedics field. Many kinds of bone graft substitute have been exploited to conquer this problem.OsteoSet,a new substitute for bone graft,with the advantage of excellent biocompatibility,degradation,bone conduction and induction of ossification,is an ideal product.OBJECTIVE:To investigate the effect of OsteoSet in repairing bone defects due to tumor.DESIGN:Retrospective study and case analysis.SETTING:Department of Orthopaedics,First Hospital of Jilin University.PARTICIPANTS: Twenty-two patients with bone defect caused by bone tumor who received operation in the Department of Orthopaedics,First Hospital, Jilin University between June 2004 and September 2006.The involved patients,14 male and 8 female,averaged 23 years old ranging from 5 to 68 years.Inclusive criteria:① Diagnosed as benign tumor in bone according to the bone tumor classification criteria instituted in China in 1983.②Had the indications of tumorectomy and bone grafting with OsteoSet substitute.③Informed consent was obtained.The position of tumor was described as 6 in shaft of humerus,2 in neck of femur, 9 in inferior segment of femor, 4 in superior segment of tibia and 1 in celcaneus respectively.METHODS:①Operation procedure:After the effective anesthesia,the tumor was exposed as usual.Then the tumor was resected as thoroughly as we could.When OsteoSet substitute in the bone defect was filled carefully in order to avoid crushing into pieces.At last the substitute should be covered with periosteum or soft tissue.②Postoperative evaluation: The area of substitute absorption was observed by X-ray examination in 4, 8, 12 and 24 weeks after oporation.Postoperatively.incision healing,pain and complications of paients were observed at 6,7,8 and 9 months.MAIN OUTCOME MEASURES: OsteoSet substitute absorption rate and new bone formation rate as well as postoperative follow-up results.RESULTS:Twenty-two patients were involved in the final analysis.①OsteoSet substitute absorption rate and new bone formation rate:The evident absorption of OsteoSet substitute could be found in the X-ray film 4 weeks after operation.At the same time,the slender bone trabecula formed and bone density ncreased.At the end of 12 weeks after operation,about 97.1 percent OsteoSet substitute was absorbed and approximate 95.3 percent new bone infiltrated the defect area. In the 6 months, the substitute absorption rate and the new bone formation rate were 99.1 percent and 98.6 percent respectively. Stable bone trabecula formed in the bone defect area and the new bone connected with the surrounding health bone naturally by remolding.②Follow-up results:All the operative incisions healed well and there were no pain and discomfort in the duration of hospital stay; All the patients had no fever, erythra or other allergic responses during the follow up;The OsteoSet substitute were absorbed well and new bone also formed well in all the cases;All the patients were satisfied with the recovery of limb function.CONCLUSION:The substitute absorption was accordance with the new bone formation.For its good absorption and new bone reconstruction,OsteoSet is an ideal substitute for bone defect caused by tumor.