Ozone air pollution and daily mortality in Genoa, Italy between 1993 and 1996

The association between ozone (O3) and daily mortality was investigated in Genoa, an Italian city characterized by a Mediterranean climate and a high prevalence of elderly inhabitants. The O3 effect, adjusted for long time trend, seasonality and weather, was assessed using Poisson regression modelling, allowing for overdispersion and autocorrelation, and expressed as mean variation percent of daily mortality per 50 microg/m3 increase (MV). Significant MVs for overall (+4.0%) and cardiovascular (+7.2%) mortality were detected at 1-day lag. The effects were stronger in the warmer season (May-October). Similar estimates were found after restricting the analyses to the elderly (>or=75 years). Furthermore, in this group, higher MVs were observed for total mortality at 2-day lag. A statistically significant synergistic effect between O3 and temperature was observed for cardiovascular mortality, particularly in elderly people, with an evident increase in mortality risk above 26 degrees C (MV +30.0% for the whole population and +40.0% for the elderly, respectively). This investigation highlights the importance of taking local climatic and demographic features into account when comparing different time-series studies, and substantiates the influence of photochemical pollution on mortality trends in small urban areas.     

Potential Oxidative Stress in the Bodies of Electric Arc Welding Operators： Effect of Photochemical Smog

INTRODUCTION Electric arc welding is widely used in many fields such as welding engineering, architectural engineering, automotive industry, boat and ship engineering, aerospace C…     

Postnatal remodeling of the neural components of the epithelial-mesenchymal trophic unit in the proximal airways of infant rhesus monkeys exposed to ozone and allergen

Nerves and neuroendocrine cells located within the airway epithelium are ideally situated to sample a changing airway environment, to transmit that information to the central nervous system, and to promote trophic interactions between epithelial and mesenchymal cellular and acellular components. We tested the hypothesis that the environmental stresses of ozone (O(3)) and house dust mite allergen (HDMA) in atopic infant rhesus monkeys alter the distribution of airway nerves. Midlevel bronchi and bronchioles from 6-month-old infant monkeys that inhaled filtered air (FA), house dust mite allergen HDMA, O(3), or HDMA + O(3) for 11 episodes (5 days each, 0.5 ppm O(3), 8 h/day followed by 9 days recovery) were examined using immunohistochemistry for the presence of Protein gene product 9.5 (PGP 9.5), a nonspecific neural indicator, and calcitonin gene-related peptide (CGRP). Along the axial path between the sixth and the seventh intrapulmonary airway generations, there were small significant (P < 0.05) decrements in the density of epithelial nerves in monkeys exposed to HDMA or O(3), while in monkeys exposed to HDMA + O(3) there was a greater significant (P < 0.05) reduction in epithelial innervation. In animals exposed to O(3) or HDMA + O(3) there was a significant increase in the number of PGP 9.5 positive/CGRP negative cells that were anchored to the basal lamina and emitted projections in primarily the lateral plain and often intertwined with projections and cell bodies of other similar cells. We conclude that repeated cycles of acute injury and repair associated with the episodic pattern of ozone and allergen exposure alter the normal development of neural innervation of the epithelial compartment and the appearance of a new population of undefined PGP 9.5 positive cells within the epithelium.     

臭氧与胶原酶治疗腰椎间盘突出症的临床比较

目的比较和评价臭氧消融术与胶原酶化学溶解术治疗腰椎间盘突出症的疗效。方法142例腰椎间盘突出症患者,根据治疗方法不同分为2组,Ⅰ组70例,Ⅱ组72例。Ⅰ组采用臭氧消融术治疗,Ⅱ组采用胶原酶溶解术治疗。随访1周、3个月、6个月比较两组治疗效果。结果治疗后1周Ⅰ组、Ⅱ组的优良率分别为85.7%(60/70例)、68.1%(49/72例),术后随访,于3个月、6个月时的优良率Ⅰ组分别为88.6%(62/70例)、90.0%(63/70例),Ⅱ组为88.9%(64/72例)、91.7%(66/72例),两组疗效于治疗后1周时优良率的差异有统计学意义(P<0.05),3个月和6个月后优良率对比的差异无统计学意义(P>0.05)。结论臭氧消融术和胶原酶溶解术均为治疗腰椎间盘突出症的有效疗法。臭氧消融术的近期疗效明显优于胶原酶溶解术,但远期疗效两组差异无统计学意义。     

椎间盘突出症不同治疗方法回顾性分析

目的分析臭氧髓核消溶术（A组）、后路开窗髓核摘除术（B组）以及胶原酶化学髓核消溶术（C组）治疗椎间盘突出症的方法和后期效果。方法采用统一的病例选择和疗效标准,对185例患者（其中A组60例,B组63例,C组62例）进行分析,比较3组治疗后评分和优良率。结果A组治疗后评分和优良率明显高于B组和C组,有非常显著性差异（P〈0.01）,B组高于C组有显著性差异（P〈0.05）。结论椎间盘突出症不同治疗方法中,臭氧髓核消溶术和胶原酶化学髓核消溶术明显优于开窗髓核摘除术,具有基本无创的优点。而开窗髓核摘除术相对而言创伤较大,对脊柱的稳定性有一定的影响。臭氧髓核消溶术是椎间盘突出症治疗方法中最理想的方法。     

医用臭氧治疗腰椎间盘突出症长期疗效分析

目的 评价经皮椎间盘内臭氧注射治疗腰椎间盘突出症的长期疗效. 方法回顾性分析南方医科大学珠江医院影像中心及南方医院介入治疗科自2002年7月至2004年3月应用臭氧治疗的324例腰椎间盘突出症患者的临床资料.所有患者均随访≥3年,比较术前和最后随访时日本骨科学会(JOA)评分及下肢根性痛的视觉模拟评分(VAS);运用改良的MacNab分级法记录最后随访的临床效果并评价患者年龄、病史长短、突出程度及类型等因素对治疗效果的影响. 结果本组患者JOA评分、下肢根性痛VAS术前及术后终末随访时比较差异均有统计学意义(6.3±1.4 vs 13.1±1.2,P=0.018;7.5±0.8 vs 2.1±0.3,P=0.039),JOA评分、VAS改善率分别为78.2%和70.4%;改良的MacNab分级法记录到最后随访时疗效优良率为77.5%(251/324),患者年龄、病程及椎间盘突出程度对疗效有明显影响;部分(33.8%)包含型突出患者治疗后近期可有症状"反跳".结论 臭氧治疗腰椎间盘突出症术后3年以上随访结果显示疗效令人满意,患者年龄、病程和椎间盘突出程度能影响患者疗效.     

经皮穿刺切吸与臭氧射频组合应用治疗腰椎间盘突出症

目的 比较经皮穿刺椎间盘切吸术与该术式分别和臭氧氧化术、等离子射频消融术组合应用治疗腰椎间盘突出症的临床效果。方法 回顾性分析自2006-06-2012-06采用介入手术治疗的腰椎间盘突出症219例。其中经皮椎间盘切吸加臭氧氧化术55例（A组）,经皮椎间盘切吸加等离子低温射频术71例（B组）、单纯经皮椎间盘切吸术93例（C组）。结果 所有手术均顺利完成,随访1-7年,平均4年,采用视觉模拟评分法（VAS评分）、Oswestry功能障碍指数（ODI）评定疗效,经统计学分析：A、B组间差异无统计学意义（P〉0.05）,C组分别与A、B组间比较,差异有统计学意义（P〈0.05）。3组手术时间差异无统计学意义（P〉0.05）。结论 经皮穿刺椎间盘切吸术与臭氧氧化或等离子射频消融术组合使用可提高疗效。     

Antibacterial effect of ozone on cariogenic bacterial species

Objective

The aim was to evaluate the antibacterial effect of ozone on cariogenic bacterial species with and without the presence of saliva and a possible effect on the salivary proteins.

Methods

Suspensions of Actinomyces naeslundii (ACTCC 12104^T), Lactobacilli casei (N CTC 151) and Streptococcus mutans (NCTC 10449), in salt buffer or in saliva, were exposed to ozone gas delivered by the ozone generator Healozone™ 2130C. Aliquots of the suspensions were taken after 10, 30 and 60 s ozone exposures and cultivated on agar plates. Initial number of bacteria per ml was 8.0 × 10⁷ (SD 2.2 × 10⁷) (A. naeslundii), 1.0 × 10⁸ (SD 3.1 × 10⁶) (L. casei) and 1.0 × 10⁸ (SD 7.0 × 10⁵) (S. mutans), respectively. The proteins were separated by SDS electrophoresis and visualized by silver staining.

Results

In salt buffer 92%, 73% and 64% of the initial numbers of A. naeslundii, S. mutans and L. casei, respectively, were killed already after 10 s ozone exposure, while approximately 99.9% of the bacteria were dead after a 60 s exposure. After 10 and 30 s, but not after 60 s exposure to ozone, S. mutans and L. casei were less efficiently killed in saliva compared to the salt buffer. Various saliva proteins were degraded by ozone after a 60 s exposure.

Conclusions

The cariogenic species S. mutans, L. casei and A. naeslundii were almost eliminated following 60 s of ozone treatment. This killing was reduced in the presence of saliva although increasing the ozone application time to 60 s overcame these reductants in saliva. Detection of altered salivary proteins indicates that saliva components constitute additional targets for ozone.     

医用三氧关节内注射治疗骨性膝关节炎患者的临床观察

目的 探讨三氧膝关节内注射治疗骨性膝关节炎的疗效。方法 骨性膝关节炎患者80例,随机分成A组和B组,每组40例。A组注射消炎镇痛液,含0．75％罗哌卡因与得宝松;B组除注射消炎镇痛液,再注入医用三氧48～110ml。每周1次,连续注射治疗3周。治疗前后比较患者7项常见症状。结果B组治疗后症状积分明显低于A组,B组疗效指标改善显著（P〈O．05）。结论医用三氧复合低浓度局麻药和少量糖皮质激素注射治疗骨性膝关节炎安全有效,能明显提高疗效。     

外置注入式婴儿培养箱消毒装置的实现原理及设计

该研究首先阐述了婴儿培养箱消毒的重要性,然后从臭氧的消毒机理展开讨论,根据婴儿培养箱的结构特点和臭氧消毒的优势,结合临床应用得到臭氧消毒的实现原理,提出一种外置注入式婴儿培养箱消毒装置的设计方法。该设计通过在婴儿培养箱箱体外安装一套消毒装置,利用该装置中的电子臭氧发生器现场制取臭氧消毒气体,经输气管将臭氧消毒气体注入婴儿培养箱箱体内,在一定浓度和时间的作用下达到消毒的目的,为婴儿培养箱消毒提供了一套安全有效、简单实用的臭氧消毒方法,且该消毒装置具有设计合理、创意新颖、制作简单、操作方便,以及消毒无死角、无二次残留污染等优点。