Objective　To determine the diversity of ureB gene of H. pylori for development of vaccines and evaluation of diagnostic kits by sequence analysis of ureB genes of 8 H. pylori. Methods　Primers were designed according to the sequence of strain 26695 and used to amplify the ureB gene of H. pylori (CAPM N62, CAMP N93, CAMP N98, CAMP F3). The PCR products were cloned into pGEM-T vector respectively and sequenced. The sequences of tested strains were compared with the corresponding regions of the GenBank strains (26695, J99, MD506, CPM630) and analyzed by DNA and Winstar software. Results　There are three kinds of length of ureB gene in all 8 strains. The lengths of ureB gene of CAMP F3 and CPM630 are 1269bp and 1680bp respectively. The others are 1710bp. The result of the sequence analysis of ureB gene of 6 strains of H. pylori with length of 1710bp indicated that the three foreign strains showed high homology in nucleotide acid and their homology were 100% in putative amino acid. The three domestic strains were closely related. Conclusions　As a potential protective antigen, ureB has the problem of variable coverage rate in different populations. In order to gain extensive coverage rate, it is important to find the antigen peptide of conservative ureB gene of H. pylori which is predominant in population.

Objective To evaluate the safety and effectiveness of one stage surgery of release and bone reduction by posterior approach to treat basilar invagination (BI) with irreducible atlantoaxial dislocation (IAAD),and to explore the indications and crucial techniques of posterior approach.Methods All of 17 Consecutive patients (8 males and 9 females) with BI and IAAD who underwent release and reduction by posterior approach from July 2000 to June 2015 were enrolled in the present study,the mean age was 35.2±13.8 years with a range of 12-56 years.The clinical symptoms and signs was recorded,and preoperative imaging examination,including anteroposterior,lateral,dynamic films,MRI and CT of cervical spine,were performed to identify the series.There were 14 cases with atlanto-occipital fusion,7 cases with C2,3 fusion,6 cases with Chiari malformation,6 cases with Syringomyelia,and 8 cases with myelomalacia.The clinic symptoms include occiput/neck pain in 15 cases,cervical movement limitation in 13 cases,short neck in 9 cases,torticollis in 12 cases,Paresthesia in 14 cases,weakness in 13 cases,tendon reflexes hyperfunction in 16 cases and ataxia in 13 cases.The postoperative X-rays,MRI or CT were used to observed the results of decompression,fixation and fusion.Neurological function was assessed by JOA scale and Ranawat's score before,after surgery and at final follow-up.Pre-and post-operative Chamberlain (CL),Wackenheim (WL),McGae (ML),atlantodental interval (ADI) and cervico-medullary angle (CMA) were analyzed by student t-test.Results The average operation time was 145 mins (90-210 mins) and blood loss was 175 ml (150-350 ml).The average follow-up was 44.47 months (9-94 months).JOA score was increased from 8.06 preoperatively to 15.20 postoperatively,the improvement rate was 77.2％.Preoperative Ranawat's score was Ⅱ in 1 case,Ⅲla in 12 cases,ⅢB in4 cases.Postoperative score was Ⅰ in 13 cases,Ⅱ in 4 cases.The preoperative CL,WL,ML,ADI and CMA were (12.52±5.17) mm,(6.59±3.04) mm,(6.96±4.32) mm,(9.88± 1.93) mm,115.35°± 12.40°,respectively.and the postoperative CL,WL,ML,ADI and CMA were (2.0±3.67) mm,(-3.06±1.85) mm,(-1.76±2.88) mm,(1.17± 1.18) mm,136.76°±11.44°,respectively.The perioperative complications were discovered in 2 cases,including 1 case of infection and1 case of cerebrospinal fluid(CSF) leakage.Conclusion Primary surgery of nerve release and bone reduction by posterior approach may be safe and efficient for the treatment of BI and IAAD.Preoperative evaluation,proper surgical indications and advanced surgical techniques are important for treatment results.

Objective To establish the separation and expansion method of human umbilical cord derived mesenchymal stem cells (hUCMSCs) and explore the influence of 1,25 (OH)2VD3 on hUCMSCs in vitro.Methods UCMSCs were cultured from adherent tissue pieces and detected by immunohistochemistry.Taking the third generation with good growth state UCMSCs make intervene experiment.Set 10-7 mol/L,10-9mol/L and 10-11 mol/L 3 kind of concentration of 1,25(OH)2VD3 as the experimental group,and a control group (DMEM medium).The morphologic change of UCMSCs was observed by inverted microscope.Observe the cell proliferation by the method of MTT.Detect alkaline phosphatase assay and type Ⅰ collagen assay from immunohistochemistry.And the calcium tubercle formation would be examined after 21 days.Results UCMSCs were cultured from adherent tissue pieces and strongly positive for CD44,CD105 and negative for CD34,CD45.consistent with the hUCMSCs characteristics.Under different concentration of 1,25 (OH)2VD3hUCMSCs proliferation were promoted within 7 days but were suppressed beyond 7 days.The high doses group ( 10-7 mol/L group ) obvious inhibitted the stem cell proliferation.Different concentrations of 1,25 (OH)2VD3 and days have interactive effect (P ＜ 0.05).The differences between different groups with ALP and type Ⅰ collagen assay has statistical difference (P ＜ 0.05).The secretion of ALP and type Ⅰ collagen assay of 10-7 mol/Lconcentration group was higher than others.Typical mineralization nedus was found in intervene groups.Conclusion HUCMSCs can be successfully cultured from the adherent tissue pieces.1,25(OH)2VD3 can effectively induce hUCMSCs to differentiate into osteoblasts in vitro.

Periosteal autograft from different sources have been used to repair 1.5cm bone defects of radius in 10 rabbits.On the left side,sharp-dissected grafts were implanted and the animals were sacrificed 4,8,14,30 and 60 days after operation.Bone formation was studied with X-ray and histologic technique.The results showed that the way of sharp-dissecting can preserve the periosteum completely,and good bone formation was found in this group.It suggested that the sharp-dissecting of the periosteum is the important key for periosteal graft.

Objective To introduce the donor heart preservation techniques and study the clini- cal results in 26 patients undergoing orthotopic heart transplantations with long donor ischemia time (DIT) in our center.Methods From Sept.2004 to Aug.2006,26 patients underwent orthotopic heart transplantation at our center with DIT longer than 360 min.Crystalloid cardioplegia was infused through aortic root after aorta was cross clamped.UW solution was used when donor heart was removed.All patients underwent bicaval anastomotic cardiac transplantation.NO was inhaled through ventilator during and after operation in patients with pulmonary hypertension.Results DIT was 360- 560 (mean 401?43) min.There was no operative death in this group.Echocardiography and X-ray examinations in one month were normal.One case of abnormal coronary orifice was subjected to re- anastomosis of aorta.One case of renal failure post-operation was subjected to blood dialysis.Conclu- sion With proper donor heart procurement and preservation,recipient selection,anastomotic technique,efficient postoperative surveillance and pulmonary hypertension treatment,transplanted patients with long DIT can obtain the satisfactory short-term outcome.

Objective To research the effective protection from microwaves radiated from mobile telephones. Methods The observed mobile telephone was covered with a compound membrane developed by us and made from metal foil, metal silk screen, graphite and binder with a thickness of 0.5 mm. The electromagnetic field intensities were determined at 2.6 cm far from the front of the speaker, screen and keyboard of the observed mobile telephones covered with protective membrane or not. Results The electromagnetic field intensities of those three monitored locations mentioned above were 0.145, 0.095 and 0.085 mW/cm 2 for the mobile telephone without the protective membrane respectively, and were all

Periosteal autograft from different sources have been used to repair 1 5cm bone defects of radius in 10 rabbits.On the left side,sharp dissected grafts were implanted and the animals were sacrificed 4,8,14,30 and 60 days after operation.Bone formation was studied with X ray and histologic technique.The results showed that the way of sharp dissecting can preserve the periosteum completely,and good bone formation was found in this group.It suggested that the sharp dissecting of the periosteum is the important key for periosteal graft.

Thirty three tibial fractures treated with interlocking intramedullary nail(IMN) were reviewed. Of all the patients, 16 were fixed with reamed IMN, and 17 with nonreamed IMN. There were 22 closed and 11 open fractures. Twenty seven patients were followed up for an average of 17.9 months (4 to 31 months). Of all the patients, 22 healed in 6 months, delayed healing occurred in 1,and in 1 the distal locking screw was broken. In the close fractures, the mean time from fracture to operation was 3.55 days (from the injury day to 27 days) , and in the open fractures operation was all done on the day of injury. Nonreamed IMN was used in 12 closed fractures (54.5%, 12/22 ) , and reamed IMN was used in 4 open fractures (36.3%, 4/11). There was no postoperative compartment syndrome or infection. The interlocking intramedullary pin is indicated for the tibia fractures, and early operation is feasible . The nonreamed interlocking intramedullary pin is suitable for open fractures and multi injuries.

Objective To report the result of minimally invasive treatment of scaphoid non-union in soldiers. Methods Twenty-two soldiers 19 to 27 years of age were admitted for the treatment of non-union of fracture of scaphoid bone. The duration of non-union ranged from 11 to 54 months (average 16 months).All the non-union was located at the scaphoid waist, with a gap of 2 to 5 mm (average 2.5mm) as shown by radiological examination. Cyst-like changes occurred in 6 cases and displacement of the sclerotic fracture ends was found in 3 cases. Under local anethesia, a needle was inserted into the site of non-union under X-ray monitor, and 5-10 ml red bone marrow harvested from the iliac crest was injected into the site of non-union. The wrist was immobilized in functional position with elastic bandage or plaster of paris cast after the injection. Radiological follow-up was carried out every one month postoperatively. Bone marrow injection could be repeated 1 month later when necessary. Results Bone union was found in 19 cases 3-15 months (average 6 months ) after the operation. Non-union recurred in 3 patients in whom displacement of the sclerotic fracture ends was found. No complications, such as infection or joint stiffness, occurred. Conclusion Minimally invasive treatment of scaphoid non-union in soldiers can relieve pain, reduce the hospitalization days and cost, and the result is satisfactory.

Cochlear Implantation ; Cochlear Implants ; Humans ; Vestibulocochlear Nerve Diseases