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Internal fixation is one of the most important treatments for fractures.The stability of screws in internal fixation can be influenced by bone mineral density,quality of pilot holes,improper structure and surface characteristics of screws chosen,insertion torque,insertion angle,and screws unfit for the bone holes.Internal fixation of fractures can fail due to the instability of screws.This paper,on the basis of a comprehensive review of the studies on all the above factors influencing the screw stability,proposes effective methods to enhance screw stability so as to improve surgical outcomes of fracture internal fixation.
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Objective By comparing the efficacy and complication rates of the 8-mm-tip cryoablation catheter with the normal electrode ablation catheter in the treatment of atrioventricular nodal reentrant tachycardia,this study investigated the efficacy and feasibility of ablation with the 8-mm-tip cryoablation catheter.Methods This is a retrospective case-control study including 122 patients with AVNRT treated with CRYO (n =56) using an 8-mm-tip cryoablation catheter or RF ablation (n =66) from June 2014 to May 2016.The procedure success rate,the recurrence rate,atrioventricular block incidence,procedure time and the difference between the X-ray fluoroscopy dose were compared between the 2 groups.Results The procedure success rate was comparable between the 2 groups(100％ for CRYO vs.98.5％ for RF,P ＞0.999)and no AVB was found in both groups.The CRYO group needed shorter procedural time [(66.29±4.72)min vs.(70.00 ± 7.50) min,P =0.001] and less X-ray exposure [(674.14 ± 126.12) mSv vs.(837.52 ± 138.38) mSv,P ＞ 0.001] than the RF group.Conclusions 8-mm-tip cryoablation catheter cryoablation for atrioventricular nodal reentrant tachycardia is as safe and effective as compared to conventional radiofrequency ablation with potential advantages.
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[Summary] With the rapid development of endoscopic thyroidectomy for its advantages of hidden incision and good cosmetic effects, it becomes a significant issue to reduce surgical adverse effects.Recurrent laryngeal nerve ( RLN) injury is among the most important complications and is paid much attention to by clinical researchers.Reasons leading to RLN injury include accidental injury, ligation and intraoperative blood loss. An appropriate way to expose RLN, skilled operation performance, precise anatomy, individualized operation scheme and intraoperative neuromonitoring can prevent RLN injury.
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Objective To investigate the photo-toxic effects of indocyanine green (ICG) based on photodynamic therapy (PDT) on vascular endothelial cells in vitro. Methods Human umbilical vein endothelial cells were incubated with ICG with different concentrations in 96-well plate. According to the dose of ICG , they were divided into 6 groups as 0, 50, 100, 150, 200 and 250 μmol/L group. Each group consists of 8 wells, 4 of them were irradiated with a 810 nm laser of total power 24.0 J/cm2. Cell viability was measured by MTT assay 24 h after light irradiation. Morphological changes in cells were observed by light microscope. Results With the irradiation of 810 nm light , there was a significant decrease in relative cell viability in all groups except 0 μmol/L group (all P < 0). With the increase of concentration of ICG, the cell viability dropped rapidly (P < 0). Apoptotic changes can be seen in all groups except 0 μmol/L group and necrosis was the main change in cells of 200 μmol/L and 250 μmol/L group. Conclusion PDT with appropriate concentration of ICG has a strong inhibition to vascular endothelial cells in vitro and ICG-PDT may be a good new therapy for nevascularization.
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Paeonol is a major phenolic micromolecular component of Moutan cortex Radicis, a traditional Chinese Medicine. It has shown antitumor effects in previous studies; however, the underlying mechanisms remain unknown. This study investigated the mechanism by giving treatments of placebo, cyclophosphamide, paeonol of 150 and 300 mg/kg to 4 groups of mice bearing EMT6 breast cancer. Apoptosis in tumor cells were confirmed by morphology analysis, including hematoxylin, eosin staining and TUNEL staining. The results showed that the weight of EMT6 breast tumor was significantly reduced in the groups treated with both 150 and 300 mg/kg of paeonol. Immunohistochemical and Western blot results showed that the expression of Bcl-2 was down-regulated while the expression of Bax, caspase 8 and caspase 3 was up-regulated respectively. These results suggest that paeonol exhibits antitumor effects and the mechanism of the inhibition is via induction of apoptosis, regulation of Bcl-2 and Bax expression, and activation of caspase 8 and caspase 3.
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Animals , Mice , Apoptosis , Blotting, Western , Breast Neoplasms , Caspase 3 , Caspase 8 , Cyclophosphamide , Eosine Yellowish-(YS) , Hematoxylin , In Situ Nick-End Labeling , Medicine, Chinese Traditional , PhenolABSTRACT
Objective To investigate the clinical value of improved percutaneous tramhepatic cholangiographic drainage(PTCD)and percutaneous placement of biliary metallic stents on the treatment of malignant obstructive jaundice.Methods Thirty three patients with malignant biliary obstruction were treated by the improved PTCD guided by ultrasound followed by pereutaneous placement of biliary tract metallic stcnts 1～3 weeks later.Results Improved PTCD WaS succeeded in all the patients,30 patients(90.9%)accepted percutaneous placement of biliary metallic stents successfully,3 patients who failed in stents placement accepted PTCD again for palliative management of iallndice.Thofle who failed in stent placement were found to have bleeding from the PTCD tube,but recovered several days later.Jaundice alleviated in all the patients.The patients were followed up for 1～29 months,medium follow-up period is 14.8 months.Six cases were found lever and jaundice,among that,two ageepted improved PTCD again,one recovered after antibioic treatment,the remaining 3 patients failed in further treatment due to the metastasis of the tumor.Condusion Pereutaneous placement of biliary metallic stents after improved PTCD is a safe and effeetive method to relieve malignant biliary obstruction,it can improve life quality,prolong survival time.This method could be a good choice for treating the patients with mnlignant biliary obstruction without operation.
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BACKGROUND:Hepatocyte transplantation can improve biochemical parameters and survival of animals with acute liver failure.However,cell sources.immunological rejection,distribution and histomorphological alternation of transplanted hepatocytes are important issues for its wide application in clinic.OBJECTIVE:To observe early-stage histomorphological and ultrastructural changes of SV40LT antigen gene transfected hepatocytes after transplanted into rat spleen.DESIGN,TIME AND SETTING:Randomized controlled animal trial was performed at Laboratory of National Hepatobiliary and Enteric Surgery Research Center.Ministry of Health from March to December 2001.MATERIALS:Sixty male Wistar rats were selected for hepatocyte transplantation.METHODS:Sixty rats were randomly divided into 4 groups(n=15).Primary cell group and primary cell plus cyclosporine A group were intrasplenically transplanted with primarily cultured hepatocytes;SV40LT antigen gene group and SV40LT antigen gene plus cyclosporine A group were intrasplenic transplanted with SV40LT antigen gene transfected hepatocytes.Twenty-four hours before and 14 days after transplantation,the rats in primary cell group and SV40LT antigen gene group were injected with 0.5 mL normal saline through tail vein daily,while the other groups were injected with cyclosporine A (10mg/kg per day).MAIN OUTCOME MEASURES:The spleen of one rat was harvested every day postoperatively for light microscopic and electron microscopic examinations to observe survival rate,histomorphological and ultrastructural features of transplanted hepatocytes for 14 days.RESULTS:Compared with primary cell group and SV40LT antigen gene group,the survival rate of transplanted hepatocytes in the other groups was significantly increased(P<0.05),but the histomorphological and ultrastructural changes were minor.There were no significant differences in the survival rate between SV40LT zntigen gene transfected hepatocytes and primarily cultured hepatocytes during the first week after transplantation(P>0.05),while the survival rate in SV40LT antigen gene transfected hepatocytes was significantly higher than primarily cultured hepatocytes 8-14 days postoperatively(P<0.01).CONCLUSION:Under treatment of cyclosporine A,the SV40LT antigen gene transfected hepatocytes can maintain a stable ultrastructure and a long survival rate.
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BACKGROUND: Hepatocyte transplantation can improve biochemical parameters and survival of animals with acute liver failure. However, cell sources, immunological rejection, distribution and histomorphological alternation of transplanted hepatocytes are important issues for its wide application in clinic. OBJECTIVE: To observe early-stage histomorphological and ultrastructural changes of SV40LT antigen gene transfected hepatocytes after transplanted into rat spleen. DESIGN, TIME AND SETTING: Randomized controlled animal trial was performed at Laboratory of National Hepatobiliary and Enteric Surgery Research Center, Ministry of Health from March to December 2001. MATERIALS: Sixty male Wistar rats were selected for hepatocyte transplantation. METHODS: Sixty rats were randomly divided into 4 groups (n=15). Primary cell group and primary cell plus cyclosporine A group were intrasplenically transplanted with primarily cultured hepatocytes; SV40LT antigen gene group and SV40LT antigen gene plus cyclosporine A group were intrasplenic transplanted with SV40LT antigen gene transfected hepatocytes. Twenty-four hours before and 14 days after transplantation, the rats in primary cell group and SV40LTor antigen gene group were injected with 0.5 mL normal saline through tail vein daily, while the other groups were injected with cyclosporine A (10 mg/kg per day). MAIN OUTCOME MEASURES: The spleen of one rat was harvested every day postoperatively for light microscopic and electron microscopic examinations to observe survival rate, histomorphological and ultrastructural features of transplanted hepatocytes for 14 days. RESULTS: Compared with primary cell group and SV40LT antigen gene group, the survival rate of transplanted hepatocytes in the other groups was significantly increased (P 0.05), while the survival rate in SV40LT antigen gene transfected hepatocytes was significantly higher than primarily cultured hepatocytes 8-14 days postoperatively (P
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Objective To summarize the experience of diagnosis and treatment of solid-pseudopapillary tumor of pancreas (SPTP).Methods The clinical data of 15 patients with SPTP who were treated in our hospital from March,2003 to March,2006 were analyzed retrospectively.Results The 15 cases were all women, and the average age was 29.4 years.The chief manifestations were abdominal mass, abdominal pain or other abdominal discomfort. None of the 15 cases had history of pancreatitis or abdominal trauma, and no long history of drinking or smoking. Six cases were negative for CEA,CA50,CA199,CA125 and other tumor markers.Solid and solid-cystic masses in pancreas or solid and solid-cystic tumors in retroperitoneum were found both by B-mode ultrasonography and CT examinations. Preoperative fasting blood sugar was within normal limits. The tumor in 8 cases was located in the pancreatic head, in 6 cases was in the body and tail of pancreas, and in 1 case was in the neck of pancreas. The diameter of the tumors was 2.5-10 cm. No metastasis was found in the abdominal cavity or liver. Local excision was performed in 6 cases, distal pancreatectomy was performed in 5 cases, including 2 cases combined with splenectomy, and pancreaticoduodenectomy was performed in 3 cases, segmental pancreatectomy was performed in one patient with tumor in the neck of pancreas. The 15 cases showed typical pathologic manifestation of SPTP by microscopy. At followed up for 16-52 months, no evidence of recurrence or metastasis in these cases was found.Conclusions Solid-pseudopapillary tumor of pancreas primarily affects young women, and it may be located in any part of pancreas. Surgical resection is recommended as the treatment of choice, and the prognosis is good.
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Objective To evaluate the value of MRI used in the shoulder pain. Methods 34 cases with complaint of shoulder pain underwent MR scanning, the findings of both MRI and surgery were analyzed comparatively.Results MRI of shoulder in 34 cases showed full-thickness and partial-thickness tears of the rotator cuff, tendinitis, glenoid labrum tear, synovitis, biceps tendinitis, biceps dislocation and tumors. In 13 patients received arthroscopy or operation. MR findings of 11 cases were correlated to surgical result, one case diagnosed as tendonitis by MRI was showed partial-thickness tears of the rotator cuff during operating, one case in which the MRI showed normal was found biceps tendonitis by arthroscopy. Conclusion MRI can show complex anatomy of shoulder and has high accuracy in diagnosis of shoulder pain, it is a value method for shoulder pain.
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0.05). The rate of RCC after HHSSCT was 4.7% in study group; after second NS soaking, the rate of RCC was 19.1% in control group. The difference between the two groups was statistically significant (P