共查询到18条相似文献，搜索用时 171 毫秒
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应用135具出生后至7岁的小儿尸体,按身长分为三组。其中,75,5厘米以下为0～12个月,76例;95.1厘米以下为1～3岁,36例;116.2厘米以下为3～7岁,23例。对硬膜囊末端以下部位的骶管进行观察和测量。发现骶管弯度随年龄增加而变大.在骶管裂孔中央处,其长轴与皮肤之间的夹角分别为19.9°±2.53°,24.2°±3.29°、27.4°±3.40°.硬膜囊以下部位骶管长度分别为1.51±0.37厘米、2.10±0.22厘米、3.74±0.45厘米.髂嵴连线并骶角的垂直距离分别为3.83±0.91厘米、5.95±0.64厘米,7.32±0.96厘米.骶角至尾骨类的距离分别为1.85±0.40厘米、2.72±0.37厘米、3.71±0.57厘米.以上各数据在组间均有显著性差异(P<0.01)。硬膜囊末端平面的骶管管径和骶管下口的口径均以矢状较横径狭小. 相似文献
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目的探讨三种根管长度测量方法在不同牙髓状态下的相关性和有效率。方法随机选择患者有效根管170个,其中活髓根管94个,死髓根管76个。运用手感法、电测法及X线法分别进行根管长度测量。运用统计学相关函数对它们进行相关性分析。结果不管牙髓在什么状态下,电测法与X线法的相关系数r都是1.0。且电测法与X线法的测量结果一致性达88.24%。结论临床运用电测法和X线法相结合的方法是进行根管长度测量最为有效和可靠的方法。 相似文献
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目的：探讨经皮骶髂螺钉固定治疗骨盆TileB、C1型损伤的治疗方法及疗效。方法：自2011年2月～2013年12月采取微创经皮骶髂螺钉固定治疗骨盆TileB、C1型损伤24例,受伤后至手术时间为4～14 d,平均5～7d。所有患者均在仰卧位下先植入骶髂拉力螺钉固定后环,再根据损伤及骨折移位情况,同时行前环切开复位重建钢板内固定或微创经皮植入外固定支架固定。结果：术后随访5～36个月,平均14．5个月,骨折愈合良好,肢体无短缩、行走痛,根据Majeed疗效评定标准,优20例,良2例,可2例,术后无一例感染。可2例行多排CT扫描见螺钉部分进入骶管,患者有轻微骶神经损伤,予以营养神经治疗,3月后症状缓解,未行特殊处理。结论：骶髂拉力螺钉技术的固定强度大,稳定性好,微创,手术感染率低,是治疗骨盆TileB、C1型损伤的有效方法。 相似文献
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目的 :了解临床骶髂关节疾病的CT表现。方法 :对照骶髂关节骨骼及尸体标本分析研究临床 5 0例不同骶髂关节病变患者的骶髂关节CT平扫片。结果 :不同的骶髂关节病变的CT扫描有不同的表现。结论 :CT能较清楚显示骶髂关节及其周围组织结构 ,对临床骶髂关节疾病的区别及治疗有重要的意义 ,CT扫描是目前诊断骶髂关节病变最理想的检查手段。 相似文献
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基于Gauss-Newton法的空间管形拟合算法的研究 总被引：1，自引：0，他引：1
三坐标测量仪在管类产品的加工验证中高频使用。在管形坐标的测量中,由于测量坐标系与设计测量系很难保持一致,通常需要将测量坐标在CAD软件中通过旋转、平移等操作与设计坐标进行吻合调整。但此操作依靠人眼进行吻合度判断,对比精度会大大降低,使三坐标测量仪的高精度得不到真正的发挥。本文在建立空间管形自由状态方程和两端约束管形方程的基础上,建立两种模型下的测量坐标管形与设计管形之间的最佳逼近目标方程,采用Gauss-Newton法对测量管形与设计管形进行最佳逼近求解,减少人为操作误差,提高测量精度。 相似文献
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顾洁玲 《泰州职业技术学院学报》2011,11(1):25-26,58
目的探讨三腔二囊管在食管胃底静脉曲张破裂出血治疗中的应用与护理要点。方法回顾性分析2000年1月至2010年1月收治的46例食管胃底静脉曲张破裂出血病人,应用三腔二囊管压迫止血的护理体会。结果全组2例死亡,余病例治疗满意。结论对食管胃底静脉曲张破裂大出血行三腔二囊管压迫止血的患者,良好的心理护理与临床护理紧密结合,能保持患者心理健康,促进疾病愈合。 相似文献
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目的：进一步探讨脊髓型颈椎病与发育性颈椎管狭窄的关系。方法：应用比值法对70例正常人和110例脊髓型颈椎病患者的X线侧位片进行统计学测量与比较，研究范围从C3～C7。结果：C3～C7正常组与颈椎病组的椎管中矢径比值有显著性差异。结论：发育性颈椎管狭窄是脊髓型颈椎病的重要发病因素。 相似文献
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目的:虽然髂后嵴常被用于不稳定型骨盆骨折的固定,我们对髂后嵴进行解剖测量探讨骶骨棒内置的安全性。方法:共解剖32具尸体标本,男18具,女14具,从L5椎板上缘至两侧髂后上棘不同水平测量腰骶管至双侧髂后嵴顶点连线的距离。结果:发现所有标本从L5椎板上缘至两侧髂后上棘水平间其距离都大于要求的12mm安全距离,最大距离位于L5-S1接合处水平,在髂后上棘水平以下平均距离为8.88mm。结论:从L5椎板上缘至两侧髂后上棘间的髂后嵴区域安全且骨质量较好可用于骶骨棒的安全、有效固定,在髂后上棘水平以下安装骶骨棒是危险的。 相似文献
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马亚明 《泰州职业技术学院学报》2011,11(5):64-65
研究和总结临床34例骶骨肿瘤患者的围手术期的护理措施,发现术前良好的心理护理和准备、术后细致的病情观察和创面处理,对于骶骨肿瘤患者的病情恢复具有重要的作用。 相似文献
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Objective： To discuss possible relationships between class In malocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with class nI malocclusion. Methods： Thirty-one children with class In malocclusion were investigated and their perioral forces were measured at rest and during swallowing under natural head position by a custom-made miniperioral force computer measuring system. Results： The resting pressures exerted on the labial side and palatine side of the upper lett incisor, as well as the labial side and lingual side of the lower lett incisor, were 0 g/cm^2, 0 g/cm^2, 0.57 g/cm^2 and 0.23 g/cm^2, respectively. Correspondingly, the swallowing forces were 2.87 g/cm^2, 5.97 g/cm^2, 4.09 g/cm^2 and 7.89 g/cm^2, respectively. No statistical difference between muscular pressure and gender existed. During swallowing, the lingual forces were significantly higher than the labial forces （P〈0.01）, however, at rest there was no significantly different force between these two sides. Compared to the normal occlusion patients, children with class Ⅲ malocclusion had lower pedoral forces. The upper labial resting forces （P〈0.01）, the lower labial resting forces （P〈0.05） and all the swallowing pressures from the lips and the tongue （P〈0.01） showed statistical differences between the two different occlusion conditions. Meanwhile, no significant difference was found for the resting pressure from the tongue between class Ⅲ malocclusion and normal occlusion. Conclusion： Patients with class Ⅲ malocclusion have lower perioral forces and this muscle hypofunction may be secondary to the spatial relations of the jaws. The findings support the spatial matrix hypothesis. 相似文献
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Objective:To discuss possible relationships between class III malocclusion and perioral forces by measuring the pressure from the lips and the tongue of children with class III malocclusion. Methods:Thirty-one children with class III malocclusion were investigated and their perioral forces were measured at rest and during swallowing under natural head position by a custom-made miniperioral force computer measuring system. Results:The resting pressures exerted on the labial side and palatine side of the upper left incisor, as well as the labial side and lingual side of the lower left incisor, were 0 g/cm2, 0 g/cm2, 0.57 g/cm2 and 0.23 g/cm2, respectively. Correspondingly, the swallowing forces were 2.87 g/cm2, 5.97 g/cm2, 4.09 g/cm2 and 7.89 g/cm2, respectively. No statistical difference between muscular pressure and gender existed. During swallowing, the lingual forces were significantly higher than the labial forces (P<0.01), however, at rest there was no significantly different force between these two sides. Compared to the normal occlusion patients, children with class III malocclusion had lower perioral forces. The upper labial resting forces (P<0.01), the lower labial resting forces (P<0.05) and all the swallowing pressures from the lips and the tongue (P<0.01) showed statistical differences between the two different occlusion conditions. Meanwhile, no significant difference was found for the resting pressure from the tongue between class III malocclusion and normal occlusion. Conclusion:Patients with class III malocclusion have lower perioral forces and this muscle hypofunction may be secondary to the spatial relations of the jaws. The findings support the spatial matrix hypothesis. 相似文献
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目的评价牙科手术显微镜（Dentaloperatingmicroscope,DOM）联合超声器械处理复杂根管病例的临床效果,为推广应用显微根管治疗技术提供指导。方法收集2009年1月至2012年10月期间收治的375例显微根管治疗病例,共586个根管的数据信息,按根管钙化、根管变异遗漏、根管治疗不完善、器械分离、根管侧穿等原因分类进行统计分析,总结各种治疗类型的临床效果。结果323颗患牙成功完成治疗,成功率86．13％;521个根管成功完成治疗,成功率88．91％。疏通钙化根管、探查遗漏根管、根管再治疗、取分离器械、修补侧穿的成功率分别为85．71％、96．03％、88．52％、82．22％、90．32％。结论显微根管治疗技术处理复杂根管的成功率高,可使许多不同类型的复杂根管病例得到理想的治疗效果。 相似文献
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根据运河文化基因和基因谱系,笔者得出以下结论:第一,将运河的各种文化纳入有序的文化谱系之中,厘清了各种运河文化与运河的亲缘关系,同时也给出了运河文化与非运河文化之间的划界;第二,根据运河文化基因谱系的生成逻辑,提出了运河文化的三种基本保护措施:运河文化基因保育、运河文化基因植入和运河文化基因嫁接,从而使运河文化的不断“繁殖”而丰富和发展运河文化,以文化的再生促进运河文化的保育。 相似文献
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Pigeons obtained food by pecking at an unmarked target location on a video screen equipped with a touch-sensitive frame. The target area was located near the top edge of the screen in Experiment 1 and near the left edge of the screen in Experiment 2. On baseline trials, a graphic landmark was located below and left of the target (Experiment 1) or below and right of the target (Experiment 2). In both experiments, baseline search distributions showed a single peak and were roughly symmetrical about the target area in both horizontal and vertical dimensions. On occasional test trials, the landmark was shifted horizontally, vertically, or diagonally by 1.5 cm or 3 cm. In both experiments, landmark shifts in the dimension parallel to the nearest edge produced systematic shifts in the peak place of search. Landmark shifts in the dimension perpendicular to the nearest edge produced inconsistent (Experiment 1) or relatively small (Experiment 2) shifts in peak place. The magnitude of the behavioral shift was always less than the magnitude of the landmark shift and was not consistently greater when the landmark was shifted by 3 cm than when it was shifted by 1.5 cm. These results demonstrated that pigeons can accurately locate an unmarked target area in a two-dimensional vertical arena and that their use of landmarks for spatial localization is similar in several respects to that found in open-field spatial search tasks. 相似文献
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目的观察咪达唑仑预防腰-硬联合麻醉下妇科手术后恶心呕吐的效果。方法腰-硬联合麻醉妇科手术患者90例,随机分为M（咪达唑仑）组、G（格拉斯琼）组和NS组,手术结束时分别静注咪迭唑仑2mg,格拉斯琼3rag和生理盐水3ml,10min后开始硬膜外自控镇痛（PCEA）,观察病人术后24h内恶心呕吐和镇静情况。结果NS组患者恶心呕吐总发生率（56．7％）显著高于其他两组（P〈0．01）,M组（32．3％）和G组（24．1％）差异无统计学意义（P〉0．05）。术后2h时M组镇静程度高于C组和NS组（P〈0．05）,但Ramsay评分均未超过3分;4h时3组病人镇静程度相近。结论腰-硬联合麻醉下行妇科手术的病人手术结束时静脉注射咪达唑仑2mg可以有效预防术后恶心呕吐,其效果和格拉斯琼3mg相似,且未表现出明显的镇静作用。 相似文献