Many reasons cause low back pain, such as muscles and ligaments injury, vertebral joints retrogression, spinal canal stenosis, lumbar disc herniation, lumbar spondylolisthesis, spondyloarthritis, infection, tumor and metabolic bone disease. It is in recent years that discogenic low back pain be recognised, especially after the MRI widely applied in clinics. This article makes a summary on discogenic low back pain of recent years from etiology, pathogenesis, diagnosis and therapy.

There is a lot of drug to cure the osteoporosis.The drug effect feature is different,and clinicle choice and application is complicated,too.This paper will review the advancement of drugs and their mechanism for treating osteoporosis,including calcium and vitamin-D,estrogen,selective estrogen receptor modulators,caicitonin,bisphosphonates,parathormone and fluoride etc.

Extremely severe pancytopenia induced by low dosage of azathioprine in systemic lupus erythematosus patients is rare. A 40-year-old Chinese female was diagnosed with systemic lupus erythematosus. She suffered worse erythema, oral ulceration, raised erythrocyte sedimentation rate and high anti-dsDNA in August 2013. Then she was initiated on oral azathioprine 50mg/d and extremely severe pancytopenia was seen in September 2013. She was recovered by a series of treatments. Regular monitoring of blood counts is highly recommended to reduce the possible serious myelosuppression induced by azathioprine.

Objective To explore the influence of stereoscopic vision on the development of posterior capsule opacification (PCO) after intraocular lens implantation. The efficacy of Nd: YAG laser was studied. Design Case-controlled study. Participants 57 consecutive patients with POC(59 eyes with phacoemulsification and IOL implantation). Methods A prospective observational study was conducted comprising 57 patients (59 eyes) who had postoperative PCO. Neodymium: YAG (Nd: YAG) laser posterior capsulatomy was performed on all patients following a standardizes procedure. Preoperative and postoperative evaluation included LogMAR visual acuity, best-corrected visual acuity (BCVA), contrast sensitivity and stereoscopic vision. Main Outcome Measures LogMAR visual acuity, BCVA, contrast sensitivity and stereoscopic vision. Results The average LogMAR eyesight median of sick eye before laser treatment was (0.22?0.31) and the contrast sensitive degree of each frequency area was relatively lower than the opposite eye; After the treatment, there was evident improvement of the sick eye, and the LogMAR eyesight median of that was 0.00; The ratio of reaching the central spatial eyesight and the average sharpness degree both improve much than ahead of treatment. Those whose spatial eyesight sharpness don't get normal after the low best remedy eyesight. Irregular dipodic and previous eye disease. Conclusions LogMAR visual acuity, BCVA, contrast sensitivity and stereoscopic vision were damaged markedly with PCO. Our results indicate that Nd: YAG capsulotomy may affect the reconstruction of stereoscopic vision. Nd:YAG laser posterior capsulotomy is a valuable and clinically relevant method for clinical treatment of PCO.

Objective To explore the management alternatives to tr aumatic periprosthetic femoral fractures after hip replacement. Metho ds A retrospective analysis was done on five cases of traumatic perip rosthetic femoral fractures posterior to hip replacement admitted in from June 1 998 to June 2003. There were two males and three females, with age range of 52- 71 years (average 59 years). One case suffered from traffic accident and the oth er four from slipping. Three cases had received hip replacement for femoral head aseptic necrosis, the other two for femoral neck non-union. Total hip replacem ent was carried out in four cases (five hips) and femoral head replacement in on e. These traumatic periprosthetic fractures occurred from one month to 17 years after hip replacement. According to classification to periprosthetic fracture of Vancouver (1995), there were 3 cases of type B and 2 type C. Two cases (one cas e of type B and one type C) were treated with traction and conservative treatmen ts, two (type B) with long shaft prosthesis revision combined with shape memory saw tooth embracing fixator or wires and one (type C) with anatomical plate inte rnal fixation. Results All 5 cases were followed up for f rom two months to five years and attained fracture union with no complications s uch as infection, nonunion or fixation breakage. Conclusions Traumatic periprosthetic femoral fractures after hip replacement are hard to deal with. The management alternatives differ according to fracture site, prost hesis loosening, bone quality and general status of patients. Classification cri teria and corresponding managements of periprosthetic fractures of Vancouver are proved to be suitable guidelines.

Objective To analyze the results and indications of anterior, posterior or combined surgery for thoracolumbar burst fractures. Methods A retrospective review of surgically managed thoracolumbar burst fractures from 1998 to 2003 was performed. There were 76 males and 13 females, and the age of the patients were from 17 to 51 years with an average of 36.8 years. The fractures were located at T11 in 10, T12 in 21, L1 in 29, L2 in 18 and L3 in 11. According to Magerl classification, type A fractures were 68, and type C were 21. Of the 89 patients, 41 received posterior surgeries, 40 anterior surgeries, and 8 combined anterior and posterior surgeries. Operative notes, preoperative and postoperative neurological status, radiographs, CT scans, and follow-up records were reviewed. Results All of the 89 cases had successful surgery. Seventy-eight patients were followed-up for 6 to 48 months (average 12 months). Neurological status improved at least 1 ASIA grade in all of the 65 patients who had preoperative incomplete paraplegia. In the posterior surgeries, pedicle screws broken in 2 cases, deep infection in 1 case which was cured after debridement. The correction of anterior vertebral body height and Cobb's angle averaged 9.4 mm and 14.8? postoperatively, and the correction loss averaged 0.5 mm and 7.5? respectively at 6 months after surgery. And the correction loss was most evident at the above disc spaces, then the below disc spaces. In the anterior surgeries, leakage of cerebrospinal fluid in 2 cases which cured with dressing change, the other cured after debridement, implant removal and posterior fixation. The spinal canal was enlarged, and the spine recovered normal curvature. No evident correction loss, pseudoarthrosis or implant failure was noted at follow-up. Conclusion The choice of anterior, posterior or combined surgery for thoracolumbar burst fractures depends on neurological status and column stability. The vertebral compression, canal encroachment, posterior column stability and concomitant displacement should be considered in the choice of appreciate surgical approach.

Objective To observe the effect of scanning laser ophthalmoscope (SLO) measuring macular light sensibility on evaluating the visual function in idiopathic epiretinal membrane (IERM), and analyze the relationship among the macular light sensibility, central visual acuity, and the thickness of fovea. Methods Procedure of microperimetry of SLO was performed on 44 patients (55 eyes) with IERM diagnosed by indirect and direct ophthalmoscope and optical coherence tomography (OCT). The light sensibility at 10? macular central area was measured. The results were compared with 31 healthy control eyes which underwent the same examinations simutaneously. The correlation among the macular light sensibility, the thickness of fovea measured by OCT, and the results of logarithm visual acuity was anaylzed. Results Compared with the control eyes, macular light sensibility decreased in IERM eyes significantly (F=47.265,P

Objective To analyze the results of one-stage combined anteroposterior surgery in lateral position for serious thoracolumbar fracture dislocation. Methods A retrospective review was performed for surgically treated thoracolumbar fractures from October 1998 to September 2005. Of all the 192 patients, the 34 serious cases were treated with one-stage combined anteroposterior surgery. There were 25 males and 9 females, 34.2 years old on the average (ranging from 18 to 56 years). Segments involved: T11 in 2 cases, T12 in 5 cases, L1 in 11 cases, L2 in 8 cases, L3 in 5 cases, L4 in 2 cases and L4,5 in 1 case. According to the Classification of Magerl, there were 12 cases of type A3, 2 cases of B1, 2 cases of B2, 12 cases of C1, 4 cases of C2 and 2 cases of C3. During the operation the patients were in lateral position. Laminectomy and pedical screw insertion were performed posteriorly first; anterior corpectomy, reduction and strut graft were accomplished through an additional anterior approach. The final fixation was finished by clapping the strut graft with pedical screw system. Operative notes, preoperative and postoperative neurological status, ASIA scales, radiographs, CT scans, and follow-up records were reviewed. Results All these surgeries were performed successfully without any neurological deterioration. 32 of 34 patients were followed-up for 6 to 60 months (13 months on average). Neurological status improved at least 1 ASIA grade in 24 patients with preoperative incomplete paraplegia. 6 patients complained intercostals nerve injury symptom which alleviated with conservative treatment. During follow-up, lumbar physical lordosis was reconstructed and no evident correction loss, pseudoarthrosis or implant failure was noted. Conclusion One-stage combined anteroposterior surgery can be accomplished in a lateral position. It was proved to be an effective treatment for serious thoracolumbar fracture dislocation.

Objective To evaluate the visual function before and after photodynamic therapy(PDT) in patients with subfoveal choroidal neovascularization (CNV) caused by age-related macular degeneration (AMD). Methods Twenty-five consecutive patients (34 eyes) treated with PDT (verteporfin) for subfoveal CNV in age-related macular degeneration diagnosed by fluorescein angiography (FFA), indocyanine green angiography (ICGA) and optical coherence tomography (OCT). Visual function including best corrected visual acuity, contrast sensitivity frequency, binocular function, confusion, stereo-vision, color vision, metamorphopsis and central scotoma were examed before photodynamic therapy and 1 week, 1 month, 3 month after photodynamic therapy. The follow-up time varied from 3 months to 2 years (mean 7.6 months). Results The changes of visual function at the 3rd month after photodynamic therapy revealed improving in 13 eyes (38.24%), without any change in 17 eyes (50.00%), and decreasing in 6 eyes (17.65%). Visual acuity with logMRA improved after photodynamic therapy, but without statistic difference. All spatial contrast sensitivity improved. Contrast sensitivity for spatial frequencies 5 cycles per degree (cpd) was better after photodynamic therapy with significant difference (P=0.045).Binocular function, fusion function, stereo function and color vision were slightly improved without statistic difference. Conclusion Damage of visual function in macular degeneration is many-sided. The treatment of PDT for exudative AMD can improve part visual function.

An automated on-line solid phase extraction-liquid chromatography-tandem mass spectrometry ( on-line SPE-LC-MS/MS ) method for the simultaneous quantification of six endogenous phytohormones including abscisic acid ( ABA ) , indole-3-acetic acid ( IAA ) , salicylic acid ( SA ) , jasmonic acid ( JA ) , indole-3-propionic acid ( IPA) and indole-3-butyric acid ( IBA) in rice tissues was described. Plant samples were extracted with methanol and on-line SPE procedure was performed with C18 SPE cartridges. Analytes were eluted to C18 analytical column with mobile phase and further analyzed by LC-MS/MS. The performance of the method was fully validated. Linearity showed good correlation (R2≥0. 99). Limits of detections (S/N=3) were in the range of 0. 1-0. 8 μg/kg. Recoveries varied between 71. 2% and 126%. The method was rapid and sensitive to determine multiple phytohormones in rice young panicles and the results were cross-validated with the off-line SPE-LC-MS/MS phytohormone analytical method. Finally, the method was applied to monitor the changes of ABA, IAA, SA and JA in wounded rice leaves. The trends were in accord with plant physiological processes.