Objective To improve the diagnosis and differential diagnosis of mediastinal cysts.Methods 36 patients with mediastinal cyst proved by surgery and pathology were collected, and CT findings were analyzed retrospectively.Results In all 36 cases,CT defined the masses with clear margin, thin wall and fluid-like density content which had no enhancement after intravenous contrast administration. There were neurenteric cyst(n=1), bronchial cyst(n=12), esophageal cyst(n=2), pericardial cyst(n=5), dermoid cyst(n=7), lymphangioma(n=4), thymic cyst(n=4) and non-special cyst(n=1). Conclusion The diagnosis of mediastinal cyst and differential diagnosis from other cystic lesions can be made according to the characteristics on plain and post-contrast CT scans.

Objective To explore the indications and efficacy of endoscopic papillary balloon dilation(EPBD) in the management of choledocholithiasis. Methods EPBD combined with a retrieval basket or balloon or both was performed to remove common bile duct stones in 42 cases from April 1999 to August 2001. The length and maximum diameter of the balloon were 5 0cm and 1 2cm respectively. The number of common bile duct stones must be less than 3, and the diameter must be less than or equal to 1 0cm. The balloon was inflated at pressure of (8～12)atm for 2min two times and the corresponding dilated diameter was 1 0cm～1 2cm. Results EPBD was performed successfully in all patients. The common bile duct stones were removed in 40 out of 42 patients, including endoscopic sphincterotomy(EST) in 4 patients, with the success rate being 95 2%(40/42). Stone removal failed in 2 patients. 3 cases had mild pancreatitis postoperatively. No complications such as bleeding or intestinal perforation occurred. Conclusions It is suitable to treat common bile duct stones by EPBD when the number of stones is less than 3 and the diameter is less than or equal to 1.0cm.

Objective To evaluate the effect of propofol preconditioning on endoplasmic reticulum stress induced by hypoxia-reoxygenation (H/R) in HEPG2 cells.Methods HEPG2 cells were randomly divided into 4 groups using a random number table:control group (group C),propofol group (group P),H/R group and H/R + propofol preconditioning group (group PP).In group C,the cells were cultured routinely for 42 h.In group H/R,after being cultured routinely for 6 h,the cells were exposed to 1％ O2 + 5％ CO2 + 94％ N2 for 12 h followed by 12 h reoxygenation.In group PP,the cells were cultured for 6 h in the culture medium containing propofol 10 μmol/L (final concentration),and then H/R was induced.The cell viability was detected by MTT assay.The expression of immunoglobulin heavy chain-binding protein (BIP),C/EBP homologous protein (CHOP) and activated caspase-3 was determined by Western blot.The expression of BIP,CHOP and caspase-3 mRNA was determined by RT-PCR.Results Compared with group C,the cell viability was significantly decreased,and the expression of BIP,CHOP and activated caspase-3 protein and mRNA was up-regnlated in H/R and PP groups,and no significant changes were found in the parameters mentioned above in group P.Compared with group H/R,the cell viability was significantly increased,and the expression of BIP,CHOP and activated caspase-3 protein and mRNA was down-regulated in PP group.Conclusion Propofol preconditioning can promote the cell proliferation and attenuate H/R injury to HEPG2 cells through inhibiting endoplasmic reticulum stress.

OBJECTIVE:To establish scientific and rational management of second kind psychotropic drugs.METHODS:The account book of second kind psychotropic drugs was set up according to specification of narcotic drugs and first kind psychotropic drugs.Daily radix management was carried out by exclusive person,account book and counter,as compared with traditional management.RESULTS & CONCLUSIONS:In this management method,checking time was decreased to 20 min from 50 min.The rate of consistency between account and drug was up to 98% from 95%.The method is superior to traditional one.

Objective To prepare polyclactic-co-glycolic acid(PLGA) polymer ultrasound contrast agent loading sudan black dye (SB-PLGA) and study the enhancement effect of it on rabbit lymph nodes imaging and as a sentinel lymph node (SLN) biopsy in the feasibility and value of the indicator.Methods SB-PLGA ultrasound contrast agent was made by double emulsion and freeze-drying methods.Thigh subcutaneous rabbit VX2 tumor model of eight lymph nodes were set up with the foot pad subcutaneous injection of contrast agents to get contrast-enhanced ultrasound imaging of the popliteal lymph node and the second inguinal lymph node stations.Then the blue stained lymph nodes were resected by popliteal lymph node dissection and the second station lymph nodes were also observed after 30 mins respectively,lymph nodes were examined by frozen sections HE staining in parallel.Results SB-PLGA microbubbles had a tight size distribution.Ultrasound imaging can be significantly enhanced lymph node imaging,the second station lymph node imaging was not obvious.Popliteal lymph node dissection for lymph node staining,30minutes later,frozen sections HE staining were seen within the lymph node contrast agent present in the lymphatic sinus and a large entry of macrophages.Inguinal lymph node dissection showed the second station of lymph nodes no blue staining.Conclusions SB-PLGA ultrasound contrast agent is good for sentinel lymph node imaging and biopsy indicator.Contrast agent retention and accumulation in the lymph nodes by the uptake of macrophages may be associated with the mechanisms of lymph node enhanced imaging.

Objective To prepare a kind of superparamagnetic iron oxide (SPIO) and doxorubicin loaded multifunctional polymer microbubbles (MPMBs),and to explore its potential application as an ultrasound(US)/magnetic resonance (MR) imaging contrast agent in vitro.Methods The MPMBs and normal polymer microbubbles (PMBs) were made by double emulsion and freeze-drying methods.The physical property,drug encapsulation efficiency and the drug-loading efficiency of MPMBs were determined,and the release property and US/MR imaging enhancement of MPMBs were observed.Results The MPMBs had a regular shape and narrow size distribution.The drug encapsulation efficiency was (60.20±2.69) ％,and the drug-loading efficiency was (6.02 ± 0.27) ％.The in vitro release experiment showed that ultrasound can promote the release of doxorubicin in MPMBs.US imaging in vitro showed that the enhancement of MPMBs was better than PMBs,and MR imaging in vitro conformed that MPMBs could well enhance MR imaging.Conclusions The MPMBs is a multifunctional contrast agent with the treatment function as well as US/MR dual-mode imaging enhancement effect.

Objective To evaluate the effect of propofol on the endoplasmic reticulum stress-mediated apoptosis during focal cerebral ischemia-reperfusion (I/R) in rats.Methods Eighty adult male Sprague-Dawley rats,weighing 240-280 g,were randomly divided into 4 groups (n =20 each):shame operation group (group S) ; focal cerebral I/R group (group FCIR); propofol pretreatment group (group P); intralipid pretreatment group (group Ⅰ).Focal cerebral I/R was induced by 4 h middle cerebral artery occlusion followed by reperfusion.Propofol was infused at a rate of 12 mg· kg-1 · h-1 starting from 30 min before ischemia until 15 min of ischemia in group P,while intralipid was given instead of propofol in group I.Neurological deficit scores (NDSs) were measured at 6 h of reperfusion in 10 rats chosen from each group and the rats were then sacrificed.Their left brains were removed for determination of brain water content.The left 10 rats were sacrificed and their brains were immediately removed for determination of the expression of C/EBP homologous protein (CHOP),Bcl-2,and activated caspase-3 in the left hippocampi by Western blot.Results Compared with group S,NDSs and brain water content were significantly increased,the expression of CHOP and activated caspase-3 was up-regulated,and the expression of Bcl-2 was down-regulated in group FCIR,NDSs was increased in group P (P ＜ 0.05).Compared with group FCIR,NDSs and brain water content were significantly decreased,the expression of CHOP and activated caspase-3 was down-regulated,and the expression of Bcl-2 was up-regulated in group P,and no significant change was found in each parameter in group Ⅰ (P ＞ 0.05).Conclusion Propofol can reduce focal cerebral I/R injury through inhibition of the endoplasmic reticulum stress-mediated apoptosis in rats.

Objective To study anxiety and depression status in patients with industrial hand injury at admission and look into the influencing factors. Method A total of 154 patients who had industrial hand injury were enrolled in the investigation by self-rating anxiety scale (SAS)and self-rating depression scale (SDS)into mental status of patients once at admission. Results The incidence rates of anxiety and depression were 40.9%(63/154)and 37.0%(57/154),respectively.21.4%(33/154)of the patients had both anxiety and depression.The data from SPSS22.0 software and multivariate Logistic regression analysis showed that anxiety and depression were closely related to age,hand function and education.Conclusion The incidences of anxiety and depression in patients with hand injury and work-related injury is significantly higher than that of healthy people, which is closely related to their age, education and hand function.

Objective To be investigated the morphology of colorectal small flat adenoma and the expressions of p53 , p21, ER and PR. Methods Colonoscopy ( Olympus CF 240) and microscopy ( Olympus BV 41) were used to observe 50 cases of colorectal small flat adenomas. The expressions of p53 , p21 , ER, and PR were detected by the two steps of immunohistochemistry in 50 cases of small flat adenomas and the surrounding mucosa, 26 cases of colorectal carcinomas, while 15 cases of the normal colorectal mucosa as control group. Results These lesions were distributed throughout the large bowel, the prevalence in order was transverse colon, sigmoid and rectum. The small flat adenoma was round, flat, or sessile in shape, and sized

Objective To explore a scientific and practical nursing plan for patients with severed finger reunion in their rehabilitation.Methods Based on literature research as well as the investigation and analysis of rehabilitation training in patients with severed finger reunion, we combined the existing rehabilitation nursing plan and investigation results together, to draft a rehabilitation nursing plan for patients with severed finger reunion. The medical, nursing and rehabilitation specialist were selected and two rounds of Delphi expert consultation were taken, to revise the draft of rehabilitation nursing plan. Results The questionnaire collecting rates of two rounds of expert consultation were 95. 00% and 94. 11%; the authority degree was 0. 79 and the coordination coefficient was 0.49 and 0.43. The significant test result of the coordination coefficient was P<0.05, and the evaluation results were desirable. The rehabilitation nursing plan developed by this paper contains 3 first-grade indicators, 11 second-grade indicators and 22 third-grade indicators.Conclusions The process of making rehabilitation nursing plan is scientific and simple, and it can be used for rehabilitation nursing and effect assessment in clinical patients with severed finger reunion.