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31.
目的 评价控制性降压是否增加脊髓对牵拉损伤的易感性。材料与方法健康成年杂种犬6只,随机分为常压和控制性降压脊髓牵拉损伤组。观察常压及控制性降压水平下相同程度牵拉损伤后脊髓血流(SCBF)、体感诱发电位(SEP)、神经源性运动诱发电位(NMEP)改变的差异。结果 外周血有创动脉压(MABP)平均下降幅度为40.5%。经SSPS统计软件独立样本t检验,不同牵拉水平下,常压组及低压组的SCBF(%)、SEP波幅(Asep)(%)及NMEP波幅(%)无显著差异。结论 尼卡地平控制性降压不增加脊髓对牵拉损伤的易感性。 相似文献
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[目的]研究膝以下严重开放性创伤的修复。[方法]自1995年3月~2005年3月收治膝以下严重开放性损伤153例,Ⅰ期修复106例,Ⅱ期修复47例,7种内固定方法,11种皮瓣修复方法。[结果]153例中随访132例,时间6个月~5年,平均17个月,术后功能优良率85.7%,皮瓣成活率良好。皮瓣局部坏死25例,骨不连4例,慢性感染8例,骨髓炎3例。[结论]改进的腓肠神经营养血管皮瓣和皮瓣桥手术扩大了皮瓣的应用范围,减少了并发症的发生。本研究为膝以下严重开放性损伤的修复提供了良好的方法;熟练的显微外科技术和各种组织瓣的合理应用是修复成功的关键。 相似文献
34.
H. Inaba M.D. J. Sato H. Uchida M. Sakurada T. Ohwada T. Mizuguchi 《Acta anaesthesiologica Scandinavica》1988,32(5):374-378
Fluctuating PEEP (F-PEEP) is a newly developed PEEP in which end-expiratory pressure (EEP) is periodically changed within a certain range. In a dog model with unilateral lung injury induced by the introduction of hydrochloric acid, F-PEEP in which the EEP was periodically changed from 0.5 to 1.5 kPa at periods of 6 min, and conventional PEEP (C-PEEP) with an optimized EEP of 1.0 kPa, were each applied for 30 min. F-PEEP produced a significantly greater improvement of PaO2 and intrapulmonary shunt (QS/QT) than C-PEEP, and at the low EEP phase, the greatest improvement accompanied by an increased dynamic compliance and a large cardiac output was obtained. These results suggest that F-PEEP provides a useful mode of artificial ventilation for the treatment of unilateral lung injury. 相似文献
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Sources of P300 attenuation after head injury: Single-trial amplitude, latency jitter, and EEG power
Single trial amplitude, latency jitter, and electroencephalographic (EEG) power were examined as sources of the group difference in averaged P300 amplitude among 15 traumatically brain injured and 20 control individuals in an auditory oddball paradigm. Mean amplitude of the individual trials was highly correlated with the amplitude of the averaged P300, with little additional unique variance attributable to latency jitter or EEG power. The group difference in P300 amplitude was also explained by the mean amplitude of the single trials. These results support the robustness of the event-related potential averaging technique within the paradigm used. 相似文献
38.
Sebastian Walter Burkhard Micheel Reinhard Pabst Jürgen Westermann 《European journal of immunology》1995,25(5):1199-1205
Lymphocytes continuously migrate through the body, and their efficient extravasation from the blood via high endothelial venules (HEV) is essential for initiating an appropriate immune response. Most investigations have focused on the lymphocyte/HEV interaction in vitro. However, to what extent such systems reflect the situation in vivo is not known. It is also unclear whether lymphocyte subsets immigrate into the HEV in proportion to their presence in the blood, and whether import capacity is limited by the HEV. When rat mesenteric lymph node lymphocytes were incubated in vitro on cryostat sections, the well-known preferential binding of B lymphocytes to HEV of Peyer's patches (PP) and T cells to HEV of axillary lymph nodes (axLN) was observed (axLN vs. PP: B lymphocytes 21.2 ± 5.0% vs. 40.6 ± 11.0%, T lymphocytes 84.6 ± 6.3% vs. 56.5 ± 12.9%). However, when labeled mesenteric lymph node lymphocytes were injected and their location within the HEV was analyzed 15 min later, no preferential interaction was seen. After injection of labeled thoracic duct lymphocytes, the percentage of labeled cells among B and T lymphocytes in the blood was significantly different (4.4 ± 0.9% vs. 8.9 ± 3.6%), whereas that in HEV of axLN (19.0 ± 6.4% vs. 16.6 ± 6.0%) and PP (30.6 ± 6.1% vs. 33.9 ± 4.4%) was comparable. Although the number of injected lymphocytes was similar in magnitude to the total blood lymphocyte pool, after injection there was no increase in lymphocyte numbers in the HEV. Thus, the adhesion assay in vitro does not completely reflect immigration into HEV in vivo. In addition, our data suggest that both the availability of lymphocyte subsets in small venules and the immigration rate into HEV are actively regulated in vivo. 相似文献
39.
神经移位修复臂丛神经根性撕脱伤 总被引:3,自引:2,他引:1
1987年7月~1994年6月,对21例臂丛神经根性撕脱伤采用神经移位修复。其中复合移位4组神经(膈神经、副神经、颈丛运动支、肋间神经)者1例,3组(膈神经、副神经、颈丛运动支)者6例,2组(膈神经、副神经)者9例,1组(膈神经或颈丛运动支或肋间神经)者5例。术中发现臂丛神经变异1例,对4例合并锁骨下动脉损伤者,在神经移位的同时进行血管修复,促进患肢的血液循环,有利于神经的康复。随访到19例,随访时间为8个月~6年2个月,优良率达73.7%。认为,神经移位术是修复神经根性撕裂伤的常规方法,合并血管损伤者也应同时修复,对促进神经功能恢复有利 相似文献
40.
刘达恩 《中国修复重建外科杂志》1997,11(2):83-85
总结胸腹轴型皮瓣早期修复上肢不同部位的深度蛇伤溃疡的经验,评价其应用价值。本组16例,胸脐皮瓣2例,侧胸腹皮瓣1例,髂腰皮瓣5例,下腹皮瓣6例,下腹分叶皮瓣1例,髂腰加下腹Y形皮瓣1例。术后1例皮瓣远端坏死,3例轻度感染,16例断蒂后全部成活。随访3个月~7年,皮瓣质地和弹性均好,手功能基本恢复。认为,带蒂胸腹轴型皮瓣是修复上肢深度蛇伤溃疡理想的方法。 相似文献