Ischemic necrosis of the entire femoral head and rapidly destructive hip disease: potential causative relationship

 Objective. Rapidly destructive hip disease (RDHD) is an uncommon disorder of the hip that has been considered a disease of unknown cause and distinct from ischemic necrosis of the femoral head. The objective of this study was to investigate ischemic necrosis of the femoral head as one potential cause of RDHD. Design and patients. In 600 patients who underwent MR imaging of the hip, 20 cases of ischemic necrosis involving the entire femoral head in 18 patients (3%) were retrospectively studied with routine radiography and MR imaging. All patients had surgically confirmed ischemic necrosis of the femoral head. Results and conclusions. All patients showed rapid destruction of the femoral head on routine radiography and MR imaging as compared with the gradual onset of clinical symptoms. Plain radiographs showed several bone fragments at the inferomedial aspect of the femoral head (75%), acetabular erosions (55%), eccentric depression at the lateral articular surface of the femoral head conforming to the adjacent acetabulum (35%), and mild osteoarthritis (15%). Bone sclerosis was often present at sites of impaction between the femoral head and the acetabulum. MR imaging showed marked distention of the joint capsule in all cases. In 14 of 20 cases, the contents of the joint space showed predominantly low or intermediate signal intensity on T1- and T2-weighted images. Ischemic necrosis involving the entire femoral head may represent one of the causes of RDHD.     

三种方案治疗小儿肺炎的药物经济学研究

目的：比较三种方案治疗小儿细菌性肺炎的效率（即费用－效果）。方法：2001年－2002年采用前瞻性随性临床试验A组50例，B组50例，C组50例作为分析模型，以深圳市二级甲等医院收费为标准，采用决策树的分析方法，进行费用一效果分析。结果：每治疗1例有效病人，A、B、C三组方案的期望成本分别为4707．45元，3052．51元，结论：同时考虑临床疗效及医疗费用，C组有最好的费用－效果，值得临床推广应用。     

前臂逆行骨间背侧皮瓣的临床应用

目的总结前臂逆行骨间背侧皮瓣的临床疗效。方法回顾性分析42例前臂逆行骨间背侧皮瓣，并结合文献阐明其变异程度及变异的处理。结果骨间背侧血管在前臂中1／3缺如1例．皮瓣边缘坏死；皮瓣向近端延伸超过4cm者4例，远端坏死，延迟愈合；其余均一期愈合：结论虽然前臂骨间背侧血管有变异，但前臂逆行骨间背侧皮瓣仍是修复手背中等大小创面较为理想的方法，以近点皮肤穿支向近端延伸皮瓣不要超过4cm。     

Comparison of fMRI statistical software packages and strategies for analysis of images containing random and stimulus-correlated motion.

The objectives of this study were to use computer-generated phantoms containing real subject motion to: (1) compare the sensitivity of four commonly used fMRI software packages and (2) compare the sensitivity of three statistical analysis strategies with respect to motion correction. The results suggest that all four packages perform similarly in fMRI statistical analysis with SPM2 having slightly higher sensitivity. The most sensitive analysis technique was to perform motion correction and include the realignment parameters as regressors in the general linear model. This approach applies to all four packages examined and can be most beneficial when stimulus-correlated motion is present.     

头面部复杂动静脉畸形的栓塞治疗

目的　研究经导管栓塞技术在头面部动静脉畸形治疗中的应用。方法　 3 0例头面部动静脉畸形患者共接受 40次栓塞治疗。其中使用国产TH胶栓塞者为 18例 2 0次 ,使用进口PVA微粒栓塞者为 12例 2 0次。结果　 3 0例患者均成功实行瘤灶供血动脉栓塞术。所有患者栓塞术后临床症状明显改善 ,如瘤体缩小甚至消失 ,皮温降低 ,搏动感和血管杂音减弱或消失等。术后随访3～ 6个月 ,12例复发。全部病例均无严重并发症。结论　对于头面部动静脉畸形的患者来说 ,经导管栓塞术是一种较好的非手术治疗方法 ,在栓塞剂的选择方面 ,则以PVA微粒栓塞更为理想。     

Solitary Small Hepatic Angiosarcoma: Initial and Follow-up Imaging Findings

We report an uncommon case of solitary, small hepatic angiosarcoma that was initially considered as a hemangioma. We present the imaging findings, with an emphasis on the initial and follow-up CT and MR findings, as well as report on the more suggestive findings of angiosarcoma than those of a hemangioma.     

冷冻食品中损伤大肠菌群的修复探讨

目的：为了准确测定冷冻食品中大肠菌群含量。避免对冷冻损伤大肠菌群的漏检。方法：应用营养物质丰富的营养肉汤，对冷冻损伤的大肠菌群在接触选择性培养基前在37℃孵育2h。结果：营养肉汤在37℃孵育冷冻损伤大肠菌群2h后，选择性平皿上菌落数与非选择性平皿上菌落数相当，细菌未发生显著繁殖；在实际样品应用试验中，提高了大肠菌群阳性样品的检出率。结论：应用营养肉汤37℃孵育冷冻损伤大肠菌群2h，可使其得到良好的修复，此修复过程是对常规检测大肠菌群方法的改进和完善。     

Dislocation of an upper third molar into the maxillary sinus after a severe trauma: a case report

Abstract – Dental injuries are common following facial trauma. This article presents a rare injury: the dislocation of a third molar into the maxillary sinus after complex mandibular and maxillary tuberosity fractures. The possible mechanism and clinical treatment are discussed.     

沙棘汁对致癌物N-二甲基亚硝胺(NDMA)在大鼠体内合成及诱癌的阻断与防护作用

在饲料中加入氨基比林和NaNO_2各2g/kg饲与Wistar大鼠38周后诱发出肝、肺及肾脏肿瘤,其中以肝肿瘤的发生率为100％(17/17),大鼠平均寿命195天。而同时给予沙棘汁饮用的大鼠其肿瘤发生较晚,发癌率较低(88％,15/17),平均寿命270天,显著长于对照组和单纯抗坏血酸组(P<0.01),且肝脏癌变范围较小,病变较轻。结果表明,沙棘汁能有效地阻断N-亚硝基化合物在大鼠体内合成及诱癌,其防癌效果优于等量的抗坏血酸。