Objective To explore the operative technique of endoscopic thyroidectomy and prevent its complications.Methods A retrospective analysis was made on the clinical data of 32 patients with benign thyroid diseases who were treated with endoscopic thyroidectomy between May 2002 and March 2005.Results Thirty-two cases were successfully treated with the mean operation time 130 min(80～180 min).Twelve cases with thyroid adenomas and 20 cases with thyroid tubers were confirmed by histologic examinations.In this group,the postoperative complications included fat liquefaction in 2 cases and transient hoarseness in 1 case who recovered 3 months after operation.No parathyroid injury occurred.The drainage tubes were removed 2~3 days after operation.All of the patients were discharged 2~5 days after operation.Conclusion Endoscopic thyroidectomy is safe and feasible with favorable cosmetic effect.

Objective To explore the effects of intraperitoneal chemotherapy with fluorouracil(FU) on the growth and metastasis of tumor cells in carbon dioxide(CO2) pneumoperitoneum.Methods Fifty male H-22 mice of clean grade were selected and randomly assigned into 5 groups in each group with 10: simple implantation group,pneumoperitoneum group,pneumoperitoneum and NS group,pneumoperitoneum and low concentration(5.0 g/L) of FU group and pneumoperitoneum and high concentration(10.0 g/L) of FU group.All mice were executed after 11 days to observe the weight and the implantation of tumor in abdominal wall.Then the expressions of proliferating cell nuclear antigen(PCNA) and vascular endothelial growth factor(VEGF) were detected by immunohistochemistry.Results The tumor weight was significantly higher in pneumoperitoneum and high concentration of FU group compared with other groups except pneumoperitoneum and low concentration of FU group(P

Objective To investigate the causes and management of T-tube obstruction after laparoscopic common bile duct exploration.Methods The clinical data of 5 patients who developed T-tube obstruction after laparoscopic common bile duct exploration from Jan.2009 to Oct.2013 were retrospectively analyzed.Results Among the 5 patients with T-tube obstruction,there were 3 patients with residual stones,1 with T-tube kinking at an angle,and 1 with abdominal muscle contraction compressing the T-tube.All of them were cured after treatment.Conclusions There is some risk of T-tube obstruction after laparoscopic common bile duct exploration.The key to resolve this problem is to play detailed attention to the operation.There should be timely discovery of the causes of obstruction followed by treatment.

Objective To explore the relation of donor liver's heme oxygenase-1 level to ische-mia/reperfusion injury and the liver function after liver transplantation. Methods Twenty-eight pa-tients receiving orthotopic liver transplantation (OLT) were divided into two groups according to the donor liver's heme oxygenase level of high HO-1 expression group and low HO-1 expression group.The recipients' serum levels of ALT, AST, bile salt output and the expression of HO-1 mRNA were determined and compared between the 2 groups. Results HO-1 mRNA of low expression group in-creased significantly after the reperfusion. Meanwhile, the HO-1 mRNA of high expression group de-creased. The serum levels of ALT and AST of HO-1 in low expression group were much lower but bile salt concentration higher than those in high expression group. Conclusion HO-1 can be further induced in the liver of HO-1 low expression group during the reperfusion period. The I/R injury in the HO-1 low expression group was less severe than that in high expression group, but the liver function was better. The increase of HO-1 during the transplantation seems better for protecting the liver than the initial HO-1 high expression. Kupffer cells are of the main localization for HO-1 protein in human liver.

Objective To construct the p300 specific siRNA vector in mice and observe its effect on cardiac transcription factor,GATA4,for further study of the effect of p300-mediated histone acetylation on heart growth. Methods Three recombinant plasmid vectors ( p300 RNAi1,p300 RNAi2,and p300 RNAi3s) ,designed and constructed according to the conservative sequence of mice p300,were respectively tansfected into in vitro cultured cardiac muscle cells of suckling mice. Expression of p300 and GATA4 at mRNA and protein levels was detected by RT-PCR and immunofluorescence,respectively. Results The expression level of p300 mRNA was not significantly decreased in pSOS-HUS and p300 RNAi2 groups,but significantly decreased in p300 RNAi1 and p300 RNAi3 groups ( 0. 220 8 ? 0. 020 0 and 0. 170 8 ? 0. 040 0 vs 0. 509 5 ? 0. 030 0,P

Objective To detect the effect of ox‐LDL on self‐renewal and Oct‐4 express of MSCs in vitro .Methods MSCs cul‐tured in vitro were divided into 4 groups :blank control(no reagents in culture system ) ,ox‐LDL (1 ,5 ,10 ,20 μg/mL ox‐LDL were added into culture system) ,ox‐LDL+NAC(corresponding ox‐LDL were added into culture system after NAC treatment ) ,negative control(corresponding nLDL were added into culture system ) .Growth curve were drawn at different time ,Oct‐4 ,a stem cell special marker ,were detected by real‐time PCR ,the production of ROS (reactive oxygen species ,ROS) in culture system were measured with electron paramagnetic resonance spectroscopy .Results proliferation of MSCs was inhibited by ox‐LDL ,when concentration of ox‐LDL was more than 5μg/mL ;apoptosis of MSCs appeared as well as attenuated expression of Bcl‐2 ,ox‐LDL generated a signifi‐cant amount of ROS in the culture system ,which was completely prevented by NAC .Conclusion The proliferation and Oct‐4 ex‐pression of MSCs were inhibited by ox‐LDL ,which may be related to increase of ROS in culture system .

OBJECTIVETo assess the embolic effects and biocompatibility of Eudragit mixture, a new liquid embolic agent.

METHODSIn vitro, the viscosity and precipitation time of Eudragit mixtures at several concentrations were measured to study the best proportion of components of the mixture. In vivo, a branch of the right external carotid artery was embolized with Eudragit mixture in 12 rabbits, and with n-butyl cyanoacrylate in another 12 rabbits for a comparative study of the general, angiographic and histopathologic changes between the two groups.

RESULTSEudragit mixture containing 7.5 g Eudragit, 50 ml absolute ethanol and 50 ml iopromide was shown in vitro to have good properties including rapid precipitation and soft elastic sponge formation upon contact with blood; in vivo, to be nontoxic, nonadherent to the microcatheter and able to embolize the vascular lumen completely without later recanalisation.

CONCLUSIONEudragit mixture is an effective, nontoxic, safe and promising liquid embolic agent.

Animals ; Carotid Artery Thrombosis ; pathology ; physiopathology ; therapy ; Cerebral Angiography ; Chemical Precipitation ; Embolism ; therapy ; Embolization, Therapeutic ; methods ; Enbucrilate ; therapeutic use ; Male ; Polymethacrylic Acids ; chemistry ; therapeutic use ; Rabbits ; Viscosity

Objective:To investigate the clinical characteristics and prognosis of cytomegalovirus-sepsis-like syndrome (CMV-SLS) in premature infants, and to provide the evidence for early clinical identification and treatment.Methods:Premature infants with CMV-SLS admitted to Children′s Hospital Affiliated of Zhengzhou University from January 1, 2019 to December 31, 2022 were selected as the research subjects, and their clinical characteristics, treatment, and prognosis were retrospectively analyzed.Results:A total of seven cases of CMV-SLS were included, with a gestational age of (26.8±1.2) weeks and a birth weight of (890±121) g. The age of disease onset was 55(45, 60) days, and the age of diagnosis was 67(56, 71) days. All the seven cases were exclusively breast feeding after birth, and cytomegalovirus (CMV) DNA was detected positive in their breast milk when diagnosed with CMV-SLS. The common clinical features were fever, abdominal distension, liver function damage, decreased neutrophil and platelet counts. Pneumonia, neonatal necrotizing enterocolitis, hearing loss, and chorioretinitis were common. After the diagnosis was confirmed, all the seven cases were given intravenous treatment of ganciclovir and followed by oral formulations, with a course of treatment ranging from five to seven weeks. Two cases were treated with intravitreal injection of ganciclovir for chorioretinitis. All the seven cases survived. During the follow-up with a corrected gestational age of 12 months, one case had delayed intellectual and motor development, two cases had delayed motor development, and the remaining cases had normal development.Conclusions:CMV-SLS in premature infants mainly occurs in extremely low birth weight infants, with atypical clinical manifestations and may be misdiagnosed easily. If extremely low birth weight infants who receive CMV DNA positive breast feeding show sepsis-like symptoms, the possibility of CMV infection should be considered, and early diagnosis and treatment should be carried out to prevent adverse outcomes.