The paper uses computer multimedia technology to collect and switch audio and video signals, constructs the remote High Definition ( HD) surgery demonstration system which supports live broadcast, recorded broadcast, rebroadcast and video-on-demand depending on the network communication routing technology.It introduces functions, design scheme and composition of the system and points out that the system can realize HD video transmission and video talkback between the surgery scene and the classroom.Thus, tech-nical level of clinical surgery teaching can be enhanced.

Objective To investingate the iodine-nutritional status of the rural children form 8 to 10 years old after salt iodzation had been implemented in Qiannan State.Methods The size of thyroid gland waft measured by palpation in 421 rural children aged 8～10 years old in Qiannan State.Calorimetric eerie-arsenic assay and vitriolic ammonium assimilmion were used for testing urinary iodine,while Rsvens test was used to test the intelligent quotient (IQ).Results The rate of goiter was 5.0%(21/421).The median of urinary iodine Was 331.2μg/L The average IQ was 93.32±18.68 of the children aged 8～10.The IQ of children with different iodine-nutritional level was significantly different(P＜0.05).Conclusions The children's iodine nutrition in Qiannan State has been improved after the salt adds the iodine.Their intelligence level is quite normally.Iodine dificiency disease has been eliminated according to the national standard in terms of 8～10 year old child ufinaty iodine level and goiter rate.

Objective To explore the relationship of dynamic changes between the iodine nutritional condition and growth of children born before and after the implementation of universal iodine.Methods By means of sampling investigation,urinary iodine and goiter,height,weight,intelligence quotient(IQ)were comprehensively evahated in children aged 7～14 years old born before and after the implementation of iodine in 10 counties and 2 cities of Qiannan.Results The median of urinary iodine of children Was 91.88μg/L in 1984,133.33μg/L in 1994,316.00μg/L in 2006;goiter rate was 21.40%(122/570)in 1984,12.86%(107/832)in 1994,5.28%(45/851)in 2006;the average IQ was 89.18±4.10 in 1994,94.26±0.94 in 2006;children in each age group in 2006 has a higher height and a heavier weight compared with those in 1984.Conclusion The physical development and intelligence of children in the areas of iodine deficiency have improved along with the correction of iodine deficiency.

Humans ; Lipoma ; diagnostic imaging ; pathology ; surgery ; Male ; Mediastinal Neoplasms ; diagnostic imaging ; pathology ; surgery ; Middle Aged ; Thymus Neoplasms ; diagnostic imaging ; pathology ; surgery ; Tomography, X-Ray Computed

BACKGROUND: Demineralized bone matrix and bone morphogenetic protein have been shown to have good bone induction, but less studies concerned nanometer demineralized bone matrix. Its physical and chemical properties and biological security are not yet clear.
OBJECTIVE:On the basis of preparing the nanometer human demineralized bone matrix in previous experiment, we mixed the recombinant human bone morphogenetic protein-2 together to obtain the new bone graft substitute and to research its physical and chemical properties and biological security.
METHODS:The human demineralized bone matrixes were prepared by the method of modified Urist and nano-processed then mixed with the bone morphogenetic protein-2 in specific proportions in order to be lyophilized to complete the fol owing experiments. (1) Pyrogen experiment:the material extracts were injected in the rabbits by ear intravenous. (2) Toxicity experiments:material extracts and saline were separately injected via the tail vein of mice in vivo. (3) Implantation experiments:experimental materials andβ-tricalcium phosphate were implanted into rabbits on both sides of the hindlimb muscle.
RESULTS AND CONCLUSION:After lyophilized shaping, the nanometer demineralized bone matrix material had dense surface and it’s pore diameter was 100-400μm. The pore distribution was less uniform and the porosity was of less than 30%. The main elements were carbon, oxygen and nitrogen. Nanometer human demineralized bone matrix with recombinant human bone morphogenetic protein-2 did not have pyrogen effect and the rabbits’ body temperature had no significant fluctuations after injection. The acute systemic toxicity test results showed that the nanometer human demineralized bone matrix with recombinant human bone morphogenetic protein-2 complied with the relevant provisions of the State, without obvious toxic reaction. The inflammatory response of nanometer human demineralized bone matrix with recombinant human bone morphogenetic protein-2 was significantly lighter than the reaction ofβ-tricalcium phosphate. The results showed that the nanometer human demineralized bone matrix with recombinant human bone morphogenetic protein-2 is a nanometer al ogeneic bone graft substitutes with nontoxicity, good biocompatibility, high bioavailability, and less inflammatory reaction.

Objective: To observe the clinical efficacy of long-time needle retaining at Baihui (GV 20) in treating post-stroke cognitive impairment. Methods: A total of 60 eligible patients with post-stroke cognitive impairment were randomized into a treatment group and a control group by random digital table, 30 cases in each group. The control group was intervened by basic treatment including routine therapy in Neurology department and Western medicine rehabilitation therapy, while the treatment group was intervened by same treatment in the control group combined with long-time needle retaining at Baihui (GV 20). Mental state of patients was evaluated by National Institute of Health stroke scale (NIHSS) and mini-mental state examination (MMSE) after 4 weeks of treatment. Results: After 4-week treatment, the NIHSS score dropped in both groups, and intra-group comparisons showed statistical significances (both P<0.05), and the score in the treatment group was statistically lower than that in the control group (P<0.01); the MMSE score in the treatment group was significantly higher than that in the control group, there was a statistical inter-group difference (P<0.01); the total effective rate was 93.3%, and the marked effective rate was 50.0% in the treatment group, versus 76.7% and 20.0% in the control group, there were significant differences in the total effective rate and the marked effective rate between the two groups (all P<0.05). Conclusion: Long-time needle retaining at Baihui (GV 20) can produce a safe valid therapeutic efficacy in treating post-stroke cognitive impairment.

Objective To investigate the memory monitoring ability in patients with idiopathic generalized epilepsy (IGE) and explore the mechanism of the memory impairment.Methods The feeling of knowing (FOK) paradigm of episodic memory (EM) and semantic memory (SM) were established and subsequently administered in 31 patients with IGE (IGE group) and 30 healthy controls (HC group) participants who were matched in age,sex and educational level.Results Compared with HC group (feeling of knowing of episodic memory (FOK-EM) FOK accuracy (85.29± 16.84) ％;feeling of knowing of sematic memory (FOK-SM) recall (76.61± 18.66) ％),the FOK-EM FOK accuracy ((64.03± 22.10) ％) and FOK-SM recall ((53.27±26.91) ％) in IGE group were significantly decreased(t=-4.215,P＜0.01;t=-3.677,P＜0.01).The correct judgment and correct recognition of FOK-EM ((51.16±32.93) ％) and the false judgment and correct recognition ((21.07±24.38) ％) of FOK-EM in the IGE group were significantly different with the HC group (the correct judgment and correct recognition of FOK-EM:(79.34±27.26)％ and the false judgment and correct recognition of FOK-EM:(2.45±5.38) ％;t=-3.634,P＜0.01;t=4.149,P＜0.01).Most importantly,the false judgment and correct recognition of FOK-EM were correlated with the Digital Span Test,Vocabulary Fluency Test and the Stroop effect in IGE group (r=-0.309,P＜0.05;r=-0.355,P＜0.01;r=-0.354,P＜0.05;r=0.602,P＜0.01).Conclusion The results show that the IGE group made less accurate metamemory monitoring than the HC group by underestimating their memoU performance on FOK-EM,whereas the semantic metamemory monitoring is not impaired in IGE group.More importantly,the impairment of memory monitoring was correlated with the deficit of executive function,indicating that this mechanism can be an influential factor of memory disorder in IGE.It also indicates that the episodic and semantic metamemory monitoring depend on different neural networks.

AIMTo study the non-ion surfactant vehicle (niosome) entrapped-camptothecin.

METHODSThe niosome loaded with camptothecin was prepared from Span and cholesterol using aqueous dispersion of film. The vehicles were visualised by transmission electron microscopy and sized by laser particle analyzer on a Malvern Mastersizer. An HPLC analysis method of the camptothecin was established by fluorescence detection. The entrapment efficiency of the niosomes containing camptothecin was determinated after the ultracentrifugation of the niosome. The antitumor activities of the vehicles on S180 sarcoma in mouse were studied.

RESULTSThe given niosomes were the suspension finely dispersed in aqueous solution. They were spherical vehicles with the single lamellar bilayers similar to phospholipid vehicles. The mean sizes of the vehicles were (565 +/- 6) nm. The recovery of the HPLC analysis method was 100.3% with 0.4% RSD. The entrapment efficiency of the camptothecin encapsulated by the niosome was 61%. The inhibition (%) of the niosome loaded with camptothecin on S180 sarcoma in mouse were 76.1% (P < 0.05). After the given dose the weight of the mouse of the niosome groups were 92.7% (P > 0.05) and 134.7% of blank control groups and compatothecin solution groups, respectively.

CONCLUSIONThe camptothecin niosomes were spherical in shape and similar to phospholipid vehicles with singlelamellar bilayers. Their size distributions were narrow. Their entrapment efficiency were higher. Its antitumor activity was better than camptothecin.

Acrylic Resins ; chemistry ; Animals ; Antineoplastic Agents, Phytogenic ; administration & dosage ; therapeutic use ; Camptothecin ; administration & dosage ; therapeutic use ; Cholesterol ; chemistry ; Disease Models, Animal ; Drug Compounding ; Drug Delivery Systems ; Mice ; Neoplasm Transplantation ; Particle Size ; Sarcoma 180 ; drug therapy ; pathology ; Surface-Active Agents ; Tumor Cells, Cultured

OBJECTIVETo study the effect of vascularized fibular graft on large defects of long bones and the monitoring method for the vascular status of the grafted fibula.

METHODSFrom March 1988 to February 1998, 30 patients with long bone defects over 6 cm in length received vascularized fibular graft including a monitoring island flap in our department to monitor the blood circulation of the fibulae.

RESULTSMonitoring island abnormalities were indicated in 6 flaps, which accurately gave the alarm of the circulation crisis of the fibular graft. Surgical exploration was performed timely and the blood supply was recovered instantaneously. All the bone defects were healed at 6 months postoperatively. After 4 years of follow-up, all the grafted fibulae were thickened and were just like tibiae.

CONCLUSIONSA monitoring island flap is a satisfactory method for repairing large defects of the long bones and a reliable method for assessing the vascular status of the grafted fibulae.

Adolescent ; Adult ; Anastomosis, Surgical ; Bone Transplantation ; methods ; Child ; Child, Preschool ; Female ; Fibula ; blood supply ; transplantation ; Humans ; Male ; Middle Aged ; Surgical Flaps ; Treatment Outcome ; Wound Healing