上海市卢湾区部分医院X-CT诊断医疗照射频率分析

目的了解我区部分医院X—CT检查占所有放射检查的比例，并分析2002至2004年X-CT各部位阳性检出率。方法分析X-CT诊断医疗照射频率的调查资料。结果CT检查占所有放射检查的比例为23．04％；除个别部位外，大部分阳性检出率均有所提高。结论X—CT检查的频率应予以控制，通过质控提高阳性检出率。     

NGD及NRF对大鼠坐骨神经缺损修复的电生理学检测

目的 :观察神经生长液 ( NGD)及神经再生素 ( NRF)修复大鼠坐骨神经缺损的效果。方法 :用生理盐水( NS)、NRF桥接以及 NRF桥接 +口服 NGD修复大鼠坐骨神经缺损 ,术后 12周检测大鼠坐骨神经干动作电位传导速度及肌电图。结果 :行为方面 NGD+ NRF组比 NS组恢复早 ,NS组、NRF组、NRF+ NGD组神经干动作电位传导速度的平均值分别为 5 .72 0 m/ s、16 .5 14 m/ s、2 1.310 m/ s。NS组与 NGD+ NRF组的神经干动作电位传导速度经统计学分析有显著性差异 ( P<0 .0 1)。NGD+ NRF组与 NS组的肌电图比较 ,前者的潜伏期短、峰谷值大、运动神经传导速度快。结论 :NGD+ NRF具有良好促进神经再生作用     

隐动脉筋膜蒂的交腿皮瓣修复小腿严重软组织缺损

目的探讨一种小腿严重软组织缺损的修复方法。方法以健侧隐动脉为蒂的顺行或逆行交腿皮瓣修复患侧小腿软组织缺损。结果本组8例均有效地覆盖受区创面,随访三个月,皮瓣全部成活。结论该皮瓣不牺牲小腿的重要血管,质地与受区相似,方法简单易行,血运可靠,血管蒂长,是修复小腿严重软组织缺损的较好方法。     

褪黑素在鸡脊柱侧凸模型中的影响

目的　通过鸡松果体蒂部切断的方法 ,研究褪黑素在松果体切除鸡脊柱侧凸动物模型中的作用。方法　 10只刚孵育出的WhiteLeghorn鸡作为对照组 ,未行任何处理 ,控制白天 12h光照 (强度 5 0 0Lux)、夜间 12h完全黑暗 (强度 0 - 5lux)条件下饲养 ;2 0只WhiteLeghorn鸡在鸡龄 3d时行松果体切除 ,控制光照条件同对照组 ;2 0只WhiteLeghorn鸡 3d时行松果体蒂部切断术 ,控制光照同对照组。 5周时留取所有鸡白天 (mid -day)和夜间 (mid -night)的血清 ,用RIA试剂盒测定血清中褪黑素含量。所有的鸡处死后 ,取骨骼标本 ,行脊柱前后位平片检查。结果　 5周时 ,对照组褪黑素含量呈现明显白天低 (5 7.2 5± 7.4 3)pg/ml,夜间高 (2 5 7.92± 2 6 .0 9)pg/ml的周期性变化。松果体切除组褪黑素含量 ,白天为 (6 0 .0 5± 5 .4 8)pg/ml,夜间为 (5 5 .0 9± 8.35 )pg/ml,其分泌维持低水平。松果体蒂部切断组褪黑素含量 ,白天为 (5 8.77± 8.4 4 )pg/ml,夜间为 (2 4 8.4 7± 2 7.2 1)pg/ml,仍呈白天低 ,夜间高的周期性变化。X线检查 :对照组 10只鸡无脊柱侧凸发生 ;松果体切除组 2 0只鸡中 9只鸡发生了脊柱侧凸 ,发生率为 4 5 % ;松果体蒂部切断组 2 0只鸡中有 11只发生了侧弯 ,发生率为 5 5 %。结论　松果体切除和松果体蒂部     

张力带治疗后交叉韧带胫止点撕脱骨折

自1999年12月-2004年2月采用切开复位张力带内固定治疗后交叉韧带胫止点撕脱骨折18例，术后骨折愈合良好，关节功能满意，现介绍如下。     

Biphasic Shocks Compared with Monophasic Damped Sine Wave Shocks for Direct Ventricular Defibrillation during Open Heart Surgery

Background: Biphasic waveform shocks are more effective than monophasic shocks for transchest ventricular defibrillation, atrial cardioversion, and defibrillation with implantable defibrillators but have not been studied for open chest, intraoperative defibrillation. This prospective, blinded, randomized clinical study compares biphasic and monophasic shock effectiveness and establishes intraoperative energy dose-response curves.

Methods: Patients undergoing cardiothoracic surgery with bypass cardioplegia were randomly assigned to the monophasic or biphasic shock group. Ventricular fibrillation occurring after aortic clamp removal was treated with escalating energies of 2, 5, 7, 10, and 20 J until defibrillation occurred. If ventricular fibrillation persisted, a 20-J crossover shock of the other waveform was used.

Results: Cumulative defibrillation success at 5 J, the primary end point of the study, was higher in the biphasic group than in the monophasic group (25 of 50 vs. 9 of 41 defibrillated;P = 0.011). In addition, the biphasic group required lower threshold energy (6.8 vs. 11.0 J;P = 0.003), less cumulative energy (12.6 vs. 23.4 J;P = 0.002), and fewer shocks (2.5 vs. 3.5;P = 0.002). Crossover-shock effectiveness did not differ between groups. Dose-response curves show biphasic shocks to have higher cumulative success rates at all energies tested.     

Polyamines found in gingival fluid enhance the secretory and oxidative function of human polymorphonuclear leukocytes in vitro

Many bacterial and host cells contain large amounts of polyamines that can be released at infection sites as a result of cell lysis. Consequently, the putrescine and spermidine content of gingival fluid from inflamed periodontal pockets (0.1 to 1 mM) is sharply elevated in comparison to peripheral blood. At these levels, polyamines potentiated fMet-Leu-Phe-induced Ca²⁺ signaling in polymorphonuclear leukocytes (PMNs) in vitro. Consistent with the essential role of Ca²⁺ signaling in PMN activation, secondary granule release and superoxide anion production by fMet-Leu-Phe-stimulated PMNs was enhanced in the presence of polyamines. Thus, polyamines may play a local role in modulating the antimicrobial activity of PMNs in periodontal disease.     

小儿手烧伤瘢痕畸形的整形外科治疗

Background: Cicatricial deformation in child burn of hand often leads to severe squaelae. According to different causes of disease , different plastic surgery were adopted .The key of operation lies in skin repairing , articulation dealing, and thumb correcting, which aim is to resume normal longitudinal and transverse arcs ,holding and clenching ability.