Preliminary application of MRI-navigation system in assisting the performance of percutaneous biopsy / 介入放射学杂志

Objective To evaluate the effectiveness and safety of MRI-navigation system EMT-100 in assisting the performance of precise percutaneous puncture biopsy.Methods With the help of MRI-navigation system EMT-100,percutaneous puncture biopsy of thoracic and abdominal lesions was performed in 42 patients.The puncture success rate was used as the main index to evaluate the effectiveness of MRI-navigation system EMT-100.The success rate of puncture biopsy,the total time used for procedure,the average number of puncturing,the average number of scanning,and the incidence of complications were recorded.Results In the 42 patients,the success rates with single and twice puncturing were 86％ (36/42) and 14％ (6/42) respectively.The success rate of puncture biopsy was 100％.The mean time used for locating puncture site was (11.5±5.5) min;the average number of puncturing was (1.4±0.5) times,and the average number of scanningwas(4.2±0.8) times.Among the 32 patients with pulmonary lesions,bloody sputum occurred in 2 patients (6.2％) and small amount pneumothorax in one patient (3.1％),and no serious complications occurred in other patients.Conclusion In performing percutaneous puncture biopsy of thoracic and abdominal lesions,the use of MRI-navigation system is safe.This technique has certain advantages,such as accurate positioning,high puncture success rate,wide range of application,radiationless,etc.It can help precisely obtain the lesion tissue and get pathological diagnosis.Therefore,it is really a valuable guiding technology.(J Intervent Radiol,2017,26:263-265)

The Influence of risk factors on visual performance in of phototoxic maculopathy in occupational welders / 中华劳动卫生职业病杂志

<p><b>OBJECTIVE</b>To investigate the Influence of risk factors that cause the phototoxic maculopathy by welding arc in occupational welders.</p><p><b>METHODS</b>We examined randomly a group of 86 male occupational welders 172 eyes from some local metal manufacturing enterprise from August 2010 to December 2013. The ophthalmologic examination which the participants underwent thorough including the best visual acuity, fundus examination by the supplementary lens, fundus photography, and the high definition optical coherence tomography (OCT) scan. All participants of this study underwent thorough the medicine examined by a specialist of occupational who prior to the OCT. All the subjects were divided into groups according to age, protection degrees , length of service, operating time . The incidences of phototoxic maculopathy were compared within groups. The subjects was divided randomly into the lutein group and the placebo group. The examination including the best visual acuity, serum lutein concentrations, macular pigmentoptical density (MPOD), Contrast and glare Sensitivity.</p><p><b>RESULTS</b>(1) The total incidence of phototoxic maculopathy is 32.0%. (2) The incidences of phototoxic maculopathy in the strict protection group, the randomed protective group and the nonprofessional protection group were respectively 21.4%, 36.7%, 53.6%. The incidence in the strict protection group was lower than the other two groups, the incidence was the highest in the nonprofessional protection group, and the difference was statistically significant. (3) The longer length of service, and operating time , the more incidence of phototoxic maculopathy develop. (4) The lutein group prior to the placebo group at the best visual acuity, serum lutein concentrations, macular pigmentoptical density (MPOD), Contrast and glare Sensitivity.</p><p><b>CONCLUSION</b>The risk factors of phototoxic maculopathy in male occupational welders are the length of service, operating time, protection degrees and the lutein assistantly. The incidence of phototoxic maculopathy occurs regardless of age.</p>

Clinical analysis of reformed microlumbar discectomy / 中国医师进修杂志

Objective To evaluate the clinical outcomes of the reformed microlumbar discectomy preserving partial ligamentum flavum to prevent lumbar spinal instability and .scar tissue oppression and adhesion after operation. Methods A prospective, randomized, controlled clinical study was conducted.The patients with unilateral lumbar disc herniation were randomly divided into two groups. The control group (41 cases) underwent classic mien)lumbar disceetomy,.and the test group (44 cases) underwent the same procedure but with a curved incision on the lumbo-dorsa fascia and with partial preservation of the ligamentum flavum. Visual analog scale (VAS) scores and Oswestry scale scores were used to appraise the outcomes. Results Chnieal parameters were significantly improved after the operation in two groups. In the test group the postoperative VAS scores showed a less intensity of pain after the operation than that in the control group, and this superiority disappeared 1 year after the operation. After the operation, the VAS scores in the test group and contnd group were (1.8±0.6) and (3.8±1.3) scores at 3 days (P <0.05), (1.3±0.6) and (3.5±2.1) scores at 12 weeks (P<0.05), and (1.9±0.6) and (2.8±1.7) scores at 1 year (P>0.05) respectively. After the operation, the Oswestry scale scores in the test group and control group were (18.2±6.6) and (34.4±11.8) scores at 12 weeks (P <0.05), (12.0±9.2) and (22.6±10.0) scores at 1 year (P<0.05) respectively. In both groups, there was no patient who had recurrence of intervertebral disc hernia and reoperation. Conclusions Minimally invasive discectomy has satisfactory clinical outcomes,however, with partial preserved ligamentum flavum shows a less intensity pain and a better lumbar function state. Preserving the ligamentum flavum is helpful to prevent the fibrosis-related complication and to preserve the stabihty of the spine.

Experimental study of the effects of time-phased cryopreservation and resuscitation on biological characters of osteoblasts / 生物医学工程学杂志

This is an in vitro study to explore the effects of cryopreservation and resuscitation on the biological characteristics of osteoblasts at different times. Osteoblasts taken from the crania of newly born SD rats were cultured. Comparative studies were made on the cells' proliferation, the activity of alkaline phosphatase (ALP), and the number of live cells among fresh cultured osteoblasts and cells after the inception of cryopreservation and resuscitation at time-periods of one, three, six months respectively. The results showed that there were no significant differences among four groups in cell proliferation and in activity of ALP (P > 0.05). Yet, after cryopreservation and resuscitation, there were significant differences between the six-month group and the other three groups (P < 0.05). The results also showed, after cryopreservation and resuscitation, there were no significant differences between the control group and the one-month and three-month groups, respectively (P > 0.05). These findings indicated that the live cells might decrease in number after the osteoblasts were cryopreserved for too long a period, but after cryopreservation and resuscitation, the cells still retained the original biological characteristics of osteoblasts.