Objective To investigate the value of multi-slice spiral CT (MSCT) in diagnosis of colorectal carcinoma. Methods MSCT images of 42 cases of colorectal carcinoma proved by surgery and pathology were retrospectively analyzed. Multiplanar reconstruction (MPR) in all cases, and curved planar reconstruction (CPR), shaded surface display (SSD), CT virtual colonoscopy (CTVC) and Raysum were performed in some of the cases. MSCT findings were analyzed in comparison with operative and pathologic features. Results The detecting rate and quatitative rate of colorectal carcinomas with MSCT were 100%,respectively.The accurate rates were 82.9%(29/35) and 100%(7/7) in detection of invasion of surrounding structures and metastasis in abdominal organs respectively,the sensitivity and specificity for detetion of lymph node metastasis were 71%(22/31) and 100% with MSCT imaging.Conclusion MSCT scan with multiform reconstruction techniques can make definite diagnosis of colorectal carcinoma, which is helpful for treatment plan.

AIM　To study the chemical components of the root of Clematis chinensis. METHODS Various chromatographic techniques were used to separate and purify the components. Their structures were determined on the basis of spectral and chemical evidence. RESULTS　Two compounds were isolated and elucidated as: clemaphenol A (I) and dihydro-4-hydroxy-5-hyroxymethyl-2(3H)-furanone (II). CONCLUSION Compound I and II are new compounds.

[Objective]To observe the clinical outcome of rotator cuff-reserved calcium deposit removal on extensive shoulder calcific tendinitis.To discuss if it is necessary to sacrifce the cuff integrity for a completely removal of calcium deposit.[Method]From Oct.2004 to Apr.2006,15 cases(15 shoulders)of extansive shoulder rotator cuff calcific tendinitis were treated with calcium removal under arthroseopy.Among them there were 6 males and 9 females with an average age of 44.7.The average pre-operative evaluation grade with Constant-Murley were 56(49~62).During the operation,the rotator cuff integrity were reserved in 8 cases and most of the deposits were removed with some calcium left in the reserved cuff layer.In the other 7 cases,complete deposit clearance were performed and the rotator cuff was repaired subsequently,average follow-up were 16.7 months(3~25).The Constant-Murley score and X-ray were taken after operation to evaluate shoulder function and the changes of remnant calcium were observed.[Result]13 cases reported significant pain dissolved and 2 reported pain relieved.The average postoperative Constant-Murley score of cuff-reserved group was 91(81~95),while the cuff-repaired group was 90.3(80~94).On postoperative radiograph,only 3 cases demonstrated remnant deposit,and disappeared within 3 months after operation.[Conclusion]Both of the two kinds of operations showed good clinical outcome.The rotator cuff-reserved calcium deposit removal has simplified operation techniques,less costs and fewer complications.It is unnecessary to sacrifice cuffintegrity for complete calcium removal.The remnant deposit could be absorbed when it is opened after operation.

Objective To investigate the effects of fluoride on the cell viability, cell cycle, apoptosis, and expression levels of NF-?B in primary cultured rat hippocampal neurons. Methods The rate of cell survivor, distribution of cell cycle, the percentage of apoptotic cells and the mRNA expression level of NF-?B were respectively measured by methyl thiazolyl tetrazolium (MTT), flow cytometry (FCM), and reverse transcriptase polymerase chain reaction (RT-PCR) after the hippocampal neurons were incubated with 20, 40, and 80 ?g/ml sodium fluoride for 24 hours in vitro. Results Compared with the control group, the rate of cell survivor were significantly decreased in 80 ?g/ml fluoride-treated group (P

Objective Develop a reversed-phase high performance liquid chromatography (HPLC) methodfor detecting isoniazid in vitreous humor and spinal fluid.Method Vanillin, as a derivative reagent, was added to the vitreous humor and spinal fluid samples. Isoniazid and vanillin reacted to form isonicotinoyl hydrazone which was separated and detected. The pretreatment method of sample, the linear range, the precision, the recovery of isoniazid were all established by using rabbit's vitreous humor and spinal fluid spiked with standard isoniazid. The HPLC method has then been applied to investigate the concentration of isoniazid in intoxicated rabbits'vitreous numor and spinal fluid respectively.Results As established in the method, the linear range was 0.2?g/ml～12.0?g/ml (for vitreous humor ?=0.9990, for spinal fluid ?=0.9988). The detective limit was 0.2?g/ml. The intra and inter-day precision of assay for isoniazid were less than 4.9%( n =5) in vitreous numor and spinal fluid. The average recoveries of isoniazid were more than 97.1%. The concentration of isoniazid was 74.60?7.40?g/ml in vitreous humor, 88.95?10.12?g /ml in spinal fluid.Conclusion The HPLC method is suitable for analyzing isoniazid in the vitreous numor and spinal fluid.

Objective To further understand the effect of anti-fluoride water on intellectual development of children and dental fluorosis in drinking water-type of endemic fluorosis area Pucheng county Shaanxi province.Methods Two hundred 8 to 12 years old children were randomly selected in endemic fluorosis area with changed water or unchanged water, in 2009 in Pucheng county Shaanxi province. Intelligence quotient(IQ) of children was measured by Raven's test. Children's dental fluorosis was examined by Dean's classification scheme. Results The rates of child dental fluorosis in changed water and unchanged water endemic fluorosis areas were 28.50%(57/200), 87.88%(203/231) , respectively, the difference was statistically significant(x2 = 159.19, P＜ 0.01),while dental fluorosis indices were 0.57,1.97, was marginal, moderate epidemic. Children with IQ above 90 was accounted for 89.5% (179/200), 91.5% (183/200) in changed water and unchanged water endemic fluorosis area,respectively, the difference was not significant (x2 = 0.46, P ＞ 0.05). Conclusions Changed water may decrease the incidence of child dental fluorosis, but has no obvious effect on children's IQ development in endemic fluorosis area.

Abstract?AlM:To evaluate the accuracy and practicability of three - dimensionally preformed Arbeitsgemeinschaft Osteosynthese AO titanium mesh plates for orbital fractures.?METHODS:Forty-seven patients with isolated blow-out orbital fractures were included in this study. Fracture locations were as follows: floor/medial wall ( n = 26, 55%), medial wall ( n = 12, 26%), and floor ( n = 9, 19%) . The floor fractures were exposed by a standard transconjunctival approach, whereas a combined transcaruncular transconjunctival approach was used in patients with medial wall fractures with temporary dissection of inferior oblique muscle. A three -dimensionally preformed AO titanium mesh plate was selected according to the size of the defect previously measured on the preoperative computed tomographic scan examination and fixed at the inferior orbital rim with 2 screws. The accuracy of plate positioning of the reconstructed orbit was assessed on the postoperative computed tomography ( CT) scan. The practicability of clinical use of AO three - dimensionally preformed titanium mesh plates was assessed on the preoperative and postoperative clinical data.?RESULTS: Postoperative orbital CT scan showed an anatomic three- dimensional placement of the orbital mesh plates in all of the patients. All patients had a successful treatment outcome without clinical complications. 40 patients ( 87%) had a successful enophthalmos correction. 25 patients ( 86%) had a successful recovery from diplopia.?CONCLUSlON: Three- dimensionally preformed AO titanium mesh plates for orbital fracture reconstruction results in an accurate anatomic restoration of the bony orbital contour with a high rate of success to correctenophthalmos and diplopia.

Objective:To find a feasible method to stimulate tumor-draining lymph node(TDLN) cells in clinic.Methods:CTL activity of TDLN cells induced by different stimulus (IL-2 group, IL-2+autologous tumor antigen group, IL-2+GM-CSF+IL-4+autologous tumor antigen group) was measured by the method of maximal LDH enzyme release. The mechanisms were explored by observation in morphology and detection of the CD83 positive rate of TDLN cells.Results:The level of growth of TDLN cells induced by (IL-2+GM-CSF+IL-4+autologous tumor antigen) was significantly higher than TDLN cells induced by IL-2 and (IL-2+autologous tumor antigen)(P

Objective To evaluate the information of head injury caused by the major earthquake of Wenehuan and the diagnostic value of muhi-slice spiral CT(MSCT). Methods A total of 1557 earthquake victims were hospitalized, of which head CT scan was performed in 292 eases, and abnormalities were found in 225 of them. The composition, type of injury and MSCT findings of head injury were retrospectively analyzed. Results CT abnormalities were found in 225 victims, including 66 cases of skull fracture,50 eases of cerebral contusion and laceration, 55 eases of intracranial hematoma, 16 cases of subaraehnoid hemorrhage, 16 eases of subdural collection of fluid,20 eases of foreign substance of scalp,and 2 eases of traumatic cerebral infarction. Operation was performed in 22 of them. Conclusion The incidence of head injury in earthquake was high, and most of them were not severe. The examination of MSCT was rapid, MPR and 3D images can clearly show the lesion of craniocerebral trauma. MSCT can provide more valuable information for clinical therapy in craniecerebral trauma caused by earthquake.

BACKGROUND:Low-temperature rapid prototyping technology is a new kind of rapid prototyping technology, and it is rapidly used in the preparation of bone tissue engineering scaffolds because it can make scaffold forming control able and can keep the biological activity of the materials, also can easily realize the scaffold with porous of three-dimensional structure and other advantages.
OBJECTIVE:To investigate the preparation process of polyethylene glycol-modified polylactic acid-glycolic acid/nano-hydroxyapatite (PLGA-PEG/n-HA) using the low-temperature rapid prototyping, and to test its performance.
METHODS:PLGA-PEG/n-HA and PLGA/n-HA were prepared by low-temperature rapid prototyping equipment. Under an electron microscopy, we observed ultra-structure of the scaffolds. Immersion (ethanol) method was used to test the porosity, and electronic testing machine was used to determine the material mechanical properties. Then these two kinds of scaffolds with rat osteoblasts were cultured in vitro, the cel adhesion rate was detected by precipitation method after 12 hours, and cel counting kit-8 method was used to determine the cel proliferation at culture days 1, 3, 5, 7, 9, 12.
RESULTS AND CONCLUSION:Both of the two scaffolds had ideal aperture range and high porosity. But the aperture range of PLGA-PEG/n-HA scaffolds had large fluctuations, and the average aperture was smal er than that of PLGA/n-HA. Some pores were closed up. The cel adhesion rate and the cel growth curve of PLGA-PEG/n-HA was better than that of PLGA/n-HA (P<0.05), but the mechanical properties were less than PLGA/n-HA (P<0.05). The results showed the PLGA-PEG/n-HA scaffolds had good cel compatibility.