For many reasons,the size of jointed implement for central oxygen supply are different in some small and mediate hospitals,and some equipments can not used in other departments.In order to share mutual resource and make good use of all important equipments,we design a fast jointed implement for respirator joint.In the application of 24 cases,it shows convenient and effective for saving patients.

At first,this paper introduces a kind of sickbed desk,which can be manipulated easily,and patients could live more comfortable with it.Secondly,it introduces universal lamp holder.Different light sources are used in different medical equipments and the connection of their bulbs and lamp holders are different,too.These lamp holders are expensive and apt to be damaged.In order to prolong the using time of the chilly light,and reduce the spoilage and cost,this paper designs an economic and durable universal lamp holder.

ObjectiveTo study the surgical indications of using locking compression plate (LCP) to fix the posterior pelvic ring fracture,and to explore its surgical techniques.MethodsFrom September 2005 to February 2010,30 patients with posterior pelvic ring fracture were treated with LCP.Among them 21 were males,9 were females,with the average age of 38.7 years(ranged from 21 to 68 years).The injuries were caused by traffic accident in 14 cases,fall-down from high place in 10 cases,smash of heavy object in 6cases.According to Tile classification,4 patients were type B2,8 patients were type B3,12 patients were type C1,5 patients were type C2,and 1 patient was type C3.Concurrent injures including:3 cases with lung contusion; 3 cases with abdominal parenchymatous organs rupture,2 cases with intestinal rupture,5 cases with urethral injury,5 cases with traumatic brain injury,and 8 cases with fractures of limbs,spine and acetabulum.ResultsAll the incisions of 30 patients were healed by first intention.No skin necrosis,fat liquefaction and infection.Thirty cases were followed up from 13 to 40 months,with the average time of 25.1months.According to Majeed functional score system,20 cases were excellent,7 cases were good and 3 cases were acceptable,the excellent and good rate was 90％.Twelve cases got bone healing 3 months after operation,10 cases got bone healing 4 months after operation,and 8 cases got bone healing 6 months after operation.All the cases had no reduction loss,no limb length discrepancy,no deep venous thrombosis,and had not accelerated the previous nerve symptom.ConclusionUsing LCP to fix posterior pelvic ring fracture has many advantages,including wide indication,strong strength of fixation,well biomechanical properties,easy-to-use,and very good follow-up results.

Objective To investigate the effects of serum cobalt ion concentration on the liver, kidney and heart in mice. Methods Forty 4-week-old male ICR mice were randomly divided into four groups saline were given by intraperitoneal injection once per day for 3 weeks. The body weights of the mice were recorded every 3 days to ensure the correct doses of cobalt chloride. Blood samples for testing were taken at day 4, week 1, week 2 and week 3. Serum cobalt ion concentrations were measured in all samples whereas other serum biochemical variables, including aspartate aminotransferase (AST), alanine transaminase(ALT),blood urea nitrogen (BUN), creatinine (Cr), and creatine kinase (CK) were evaluated at week 1, 2 and 3. After killing the mice at week 3, the heart, liver and kidney were collected for pathological evaluation. Results Serum cobalt ion concentration was different between the groups. High-dose cobalt chloride significantly increased AST, ALT and CK concentrations, the concentrations increasing in parallel with treatment duration.Pathological evaluation showed that high-dose cobalt chloride had toxic effects on the heart and liver, however no significant effect was apparent in the kidney. Conclusion High-dose cobalt ion concentration in serum has toxic effects on the heart and liver, but no significant effect on the kidney in mice.

BACKGROUND:Studies have found that Wudi Dan can suppress local inflammatory response of the lesioned joints to protect the articular cartilage. OBJECTIVE:To verify the effect of Wudi Dan on chondrocyte viability and apoptosis as wel as the therapeutic effect on osteoarthritis. METHODS:Rat chondrocytes were cultured in serum medium containing Wudi Dan, and the effects of Wudi Dan on cel viability and apoptosis were observed by comparison with the control group. Rabbit model of knee osteoarthritis was constructed using modified Hulth method. Rabbit models were divided into two groups:Wudi Dan group treated with Wudi Dan and control group treated with normal saline, twice a day, consecutively for 4 weeks. Therapeutic effect of Wudi Dan on knee osteoarthritis was observed;cel viability and apoptosis were observed under microscope;the levels of interleukin-1 and matrix metal oproteinase-3 were determined using immunohistochemical method. RESULTS AND CONCLUSION:The apoptotic rate of chondrocytes was significantly lower in the Wudi Dan group than the control group. Pathological findings of the rabbit knee joints showed that the control group had more severe damage to the articular cartilage than the Wudi Dan group. Immunohistochemical staining revealed that in the Wudi Dan group, the cytoplasm and extracel ular matrix were colored light and there were a smal number of positive cel s as wel as low expression of interleukin-1 and matrix metal oproteinase-3. The results suggest that Wudi Dan can effectively protect against articular cartilage lesions, reduce inflammation, and have a good therapeutic effect on osteoarthritis. Its mechanism may be related to inhibition of chondrocyte apoptosis, reduction of cytokine production and inhibition of protein expression of matrix metal oproteinase.

In order to save the expense for hospitals,a simple bomu light treating instrument is developed by ourselves.It consists of bomu light,12V/24V transformer,5/50W variable potentiometer,silicon,capacitor,plugs and the worn ATX box.Although the structure is simpler and cost is lower,it can accomplish every treating function for gynecology.

Objective To observe the treatment effect of using screwed miniplates through an intraoral and transoral approach for patients with angle and ramus fractures. Methods 21 cases of mandibular angle and ramus fractures were treated by screwed miniplates placed through an intraoral incision with transbuccal mini-incision. Results The use of intraoral and transoral approach reduced the rate of facial paralysis and scar in the internal fixation operation. No postoperative infection occurred in all the cases. Conclusion The use of rigid internal fixation through an intraoral and transoral approach can be applied in the patients with angle and ramus fractures.

Objective To produce a novel tool for breaking off the ampoule bottles,which can protect the nurses from wounding their fingers by the glass fragment so as to guarantee the safety for the nurses. Methods We design a mould with the self curing plastic and leave some space in the end to insert the ampoule bottle,then fix the bistrique and spring to break off the bottles. Results This tool can break off several kinds of ampoule bottles with any bottles cracked and has achieved good clinical effect. Conclusion This mulfunctional tool is scientificly designed,easy to make,and it is very helpful for the medical staff in protection and enhancing working efficiency,so it is very valuable to be popularized in hospitals.

BACKGROUND:Chitosan biological materials can induce bone marrow mesenchymal stem cells to differentiate toward neurons. As a derivative of chitosan, carboxymethyl chitosan has a series of excelent properties. However, whether carboxymethyl chitosan can induce the neuronal differentiation of bone marrow mesenchymal stem cells remains unclear.OBJECTIVE:To investigate the effect of carboxymethyl chitosan thermosensitive hydrogel on the differentiation of bone marrow mesenchymal stem cells into neurons and the possible mechanism.METHODS:Passage 3 bone marrow mesenchymal stem cells from rats were selected and cultured in carboxymethyl chitosan thermosensitive hydrogel extracts in different concentrations (0, 50, 100, 150, 200, 500 g/L). Control cells were cultured in culture medium with no addition of carboxymethyl chitosan thermosensitive hydrogel extracts. MTT assay was performed to investigate the effects of different concentrations of carboxymethyl chitosan thermosensitive hydrogel extracts on bone marrow mesenchymal stem cell proliferation. Western blot assay was used to explore the effect of 150 g/L carboxymethyl chitosan thermosensitive hydrogel extracts on the expression of neuron-specific enolase, Nestin, Vimentin, NF-M, microtubule associated protein 2, glial fibrillary acidic protein, β3-tubulin, Notch1 and Jag1 protein.RESULTS AND CONCLUSION:MTT assay showed that carboxymethyl chitosan thermosensitive hydrogel promoted the cell proliferation, and the proliferation rate reached the peak at the concentration of 150 g/L. Western blot assay showed that the cells induced by 150 g/L carboxymethyl chitosan thermosensitive hydrogel extract had significant increases in neuron-specific enolase, Nestin, Vimentin, NF-M, microtubule associated protein 2, glial fibrillary acidic protein, and β3-tubulin protein expression, and obvious decreases in Notch1 and Jag1 protein expression in comparison with the control group. These results indicate that the carboxymethyl chitosan thermosensitive hydrogel induces rat bone marrow mesenchymal stem cells to differentiate toward neurons, and suppresses the activity of Notch signal pathway in the process of differentiation.

Objective To explore the toxicity and biological activity of cobalt nanoparticles (CoNPs) on osteoclasts,and to analyze the relationship between cobalt nanoparticles and osteolysis.Methods From November 2014 to July 2015,RAW264.7 cell was induced to osteoclast-like cell by LPS.Different concentrations of cobalt nanoparticles and cobalt chloride were added,and the cell morphology was observed under a microscope.24 h after induction on RAW264.7,cells were grouped into cobalt nanoparticles group (10,20,50,100 μmol/L),cobalt chloride group (10,20,50,100 mol/L) and control group.MTT assessment and Q-PCR were performed at 2 h,4 h,8 h,24 h,48 h post-treatment.Results With the increase of concentration (10,20,50,100 μmol/L) and the action time (2 h,4 h,8 h,24 h,48 h),the inhibition rate of cobalt nanoparticles and cobalt chloride on osteoclast like cells was significantly increased,and the inhibition rate of cobalt nanoparticles was higher.With different concentrations (10,20,50,100 μmol/L) of CoNPs and cobalt chloride,the relative expression of CAⅡ,Cat K gene mRNA expression decreased compared with the control group,when the concentration of CoNPs was in the range of 10-50 μ mol/L,the relative expression of CAⅡ and Cat K was increased,which was reduced in cobalt chloride group.Conclusion Different concentrations of cobalt nanoparticles and cobalt chloride can inhibit the proliferation and differentiation of osteoclasts,and cobalt nanoparticles is more pronounced,when the concentration of cobalt nanoparticles was 10-50 μmol/L,the relative expression of osteoclasts CAⅡ,Cat K increaseed,which was suppressed at the same concentration of cobalt chloride.