BACKGROUND:Pedicle screw internal fixation is a commonly used method to treat osteoporotic fracture. Internal fixation can effectively reconstruct vertebral body height, restore physiological curvature, and maintain good spinal stability. OBJECTIVE:To investigate the biocompatibility of minimal y invasive percutaneous pedicle screw (Sextant) fixation in the treatment of elderly patients with osteoporotic vertebral fractures. METHODS:A total of 71 cases of senile osteoporotic vertebral fractures were given minimal y invasive percutaneous pedicle screw (Sextant) fixation for treatment. The C-arm X-ray machine was used to accurately locate the fracture vertebral body in different patients, and the corresponding surface was marked. In order to separate the subcutaneous tissue and fascia layer, the internal fixation with Sextant screw was used. 12 months after operation, the fixator was removed. The patients were fol owed up for 12 months, complications and tissues surrounding the fixator were observed. At 1, 3, 6, and 12 months after treatment, changes in Cobb angle, visual analogue scale score and Oswestry disability index were observed. RESULTS AND CONCLUSION:(1) The average operation time was 90.25 minutes;intraoperative blood loss was 85.15 mL. (2) At different time points after treatment, Cobb angle, visual analogue scale score and Oswestry disability index of the patients were significantly decreased at 1 month after treatment, and maintained stable from then on. Cobb angle, visual analogue scale score and Oswestry disability index were significantly less at 1, 3, 6 and 12 months after treatment compared with that before treatment (P<0.05). There was no significant difference in each indicator at different time points after treatment (P>0.05). (3) Two patients affected wound infection, and were cured after symptomatic treatment. No complications such as thrombosis appeared. During removal of the screw, surrounding tissues were observed. There was no inflammatory hyperplasia of soft tissue around the fixator. No fibrous tissue or black wal was found. (4) These results confirm that Sextant minimal y invasive pedicle screw internal fixation in elderly patients with osteoporotic vertebral fractures can obtain satisfactory therapeutic effect, and has good biocompatibility.

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Dioxin-like compounds are a class of persistent organic pollutants(POPs).Because of their high toxicity, stability and bioaccumulation, they have serious effects on human health and environment.Studies on the toxicity of dioxins have involved in many aspects, such as reproduction toxicity, immune toxicity, carcinogenicity, endocrine toxicity, and so on.However, few studies of the effects on intelligence had been done,and its potential mechanism had not been reported till now.In this review, the authors tried to generalize the relationship between dioxins and intelligence based on animal behavioral tests and population investigations and hypothesize its potential mechanisms.

This paper introduces a kind of tele-acquisition system for temperature and humidity data based on the technology of power line carrier,and presents its hardware interface and software design.With the application of the spread spectrum carrier and the power line communication,this system has such advantages as reliable transmission,low cost and high practicality.

The adductor spasticity is a common symptom in children with cerebral palsy. The ultramicrostructure damages have been found in adductor. If the spasticity is not treated in time, there will be some secondary injury, such as hip joint dislocation, muscle tendon crispation, contracture of joint, hip pain, and so on. The treatment for adductor spasticity includes stretching, orthosis, training device, selective posterior rhizotomy, neurotomy of anterior branch of obturator nerve, Adductor myotomy, phenol block, Botulinum Toxin injection, Intrathecal baclofen etc. Every method has its own advantage and disadvantage.

Objective To study DNA damage induced by chlorinated drinking water by-product MX.Methods Hu-man hepatocellular carcinoma cell line HepG2cells was selected as target cells to test the DNA damage induced by MX using single cell gel electrophoresis assay.In this study,the cells were treated with MX at final concentrations of10,30,100and300?mol/L.DMSO and hydrogen peroxide were administered as solvent control and positive control respectively.Results MX induced DNA single strand breaks at the concentrations of30,100and300?mol/L.The length of DNA migration induced by MX increased significantly in comparison with the solvent control(DMSO)in a dose-response manner.Conclusions Chlorinated by-product MX in drinking water could induce obvious DNA damage to human hepatocellular carcinoma cell line HepG2cells.

0.05). (2) The average squeezing anal pressure and the duration of anal squeezing decreased in the experiment group, which were significantly different from those in the control group ( P

Objective To investigate the incidence and risk factors of postcholecystectomy syndrome (PCS), and provide theoretical basis for the prevention of PCS. Methods A total of 338 patients with PCS were randomly selected in our hospital from May 1st 2013 to April 30th 2014, in which 316 cases were successful followed up including 101 males and 215 females. The data were collected from the 7 aspects including blood type, drinking history, smoking history, diabetes history, mental anxiety, dietary tendence and preoperative symptoms, and which were analyzed by binary-logistic regression analysis. Results According to the PCS diagnostic criteria, 115 patients were diagnosed with PCS (36.39%). The anxiety status and preoperative discomfort were closely related to the occurrence of PCS, with statistically significant difference (P<0.05). Conclusion The diagnosis and treatment of PCS are more complicated. We should focus on the prevention of PCS according to its risk factors, and pay attention to preoperative communication and individualized analysis of patients in order to reduce the occurrence of PCS.