军队在职干部腰身指数与心血管危险因素相关性探讨

目的 研究用腰身指数（腰围/身高比值WHtR）作为腹型肥胖指标探讨与心血管危险因素的相关性。方法 对2005年3月～2006年12月入住广州疗养院的军队在职干部共495人进行身高、体重、腰围、血压、心率、生化等检测,并进行统计学分析。结果 腰身指数异常组的年龄、体重、SBP、DBP、FBS、TC、TG以及尿酸均显著高于腰身指数正常组,HDL-C的结果则相反（P〈0.01～P〈0.001）;同时腰身指数与年龄、体重、SBP、DBP、FBS、TC、TG呈显著正相关,与HDL-C呈显著负相关（P〈0.05～P〈0.001）。结论 腰身指数可作为有效的腹型肥胖参考指标,腰身指数异常者其心血管危险因素水平比正常者高,及时控制腰身指数可以有效改善人群的健康状况。     

洁净手术室的特色设计

文中介绍了我院洁净手术室的三点特色设计,该设计经过两年的使用得到了手术室医务人员的肯定.     

A CT-free, intra-operative planning and navigation system for minimally invasive anterior spinal surgery - an accuracy study.

OBJECTIVE: A comprehensive study was performed to evaluate the accuracy of a newly developed CT-free, intra-operative planning and navigation system for anterior spine surgery. MATERIALS AND METHODS: Instruments and an image intensifier were tracked using the SurgiGATE navigation system. A laboratory study was performed on 27 plastic vertebrae. Fiducial markers were implanted in the vertebrae for accuracy evaluation purposes, and a dynamic reference base was placed on the vertebrae to establish a patient coordinate system (P-COS). Two fluoroscopic images were used for intra-operative planning. The graft bed plan was recorded in P-COS, followed by surgical formation of the graft bed, which was visualized. To evaluate the accuracy, the vertebrae were scanned with CT, and the markers were used to calculate an accurate paired-point registered transformation between the CT coordinate system and P-COS. RESULTS: Using the new SPO module, accurate planning and navigation of a resection of the vertebral body is possible using two fluoroscopic images. The overall mean error between the planned resection volume and the actual resection was 0.98 mm. In addition, the module can serve as an educational tool for training spine surgeons. CONCLUSIONS: The new fluoroscopy-based system can be used safely for accurate performance of anterior resection during spondylodesis. New methods for safe and accurate registration during anterior spine surgery need to be developed.     

成人结肠冗长症的诊治(附42例分析)

目的：探讨成人结肠冗长症的诊断与围手术期处理经验，提高对该病的诊治水平。方法：回顾性分析42例成人结肠冗长症的临床资料，并作了随访观察。结果：32例患者（75．7％）有顽固性便秘，18例患者（42．9％）存在反复不完全肠梗阻，16例患者（38．1％）便秘与腹泻交替出现，以便秘为主。39例经X线钡剂灌肠透视确诊。急诊手术3例，择期手术39例。41例（97．6％）病理检查于镜下可见典型改变。42例均行不同长度的肠段切除，4例加行乙状结肠固定术。术后随访率为83．3％（35／42），28例症状消失，4例仍有症状，保守治疗有效果，3例再次手术，术后症状消失。结论：典型的病史和X线钡剂灌肠可确诊成人结肠冗长症，外科手术是治疗本病的最终有效措施。     

骨髓基质干细胞修复兔关节软骨缺损的实验研究

目的研究以多聚乙醇酸(PGA)为支架的骨髓基质干细胞(BMSCs)复合物修复兔膝关节软骨缺损的情况。方法体外培养扩增的自体BMSCs种植于PGA支架并培养72h,然后将支架-细胞复合物植入兔关节软骨缺损模型。术后12周处死动物,标本行大体观察、组织学检查及Ⅱ型胶原免疫组化染色。结果BMSCs-PGA复合物植入后形成丰富的透明软骨样修复组织,新生软骨无明显退变。对照组主要为纤维组织及软骨下骨修复。结论BMSCs-PGA复合物可修复关节软骨缺损。     

Automatic algorithm for correcting motion artifacts in time-resolved two-dimensional magnetic resonance angiography using convex projections.

Time-resolved contrast enhanced magnetic resonance angiography (MRA) may suffer from involuntary patient motion. It is noted that while MR signal change associated with motion is large in magnitude and has smooth phase variation in k-phase, signal change associated with vascular enhancement is small in magnitude and has rapid phase variation in k-space. Based upon this observation, a novel projection onto convex sets (POCS) algorithm is developed as an automatic iterative method to remove motion artifacts. The presented POCS algorithm consists of high-pass phase filtering and convex projections in both k-space and image space. Without input of detailed motion knowledge, motion effects are filtered out, while vasculature information is preserved. The proposed method can be effective for a large class of nonrigid motions, including through-plane motion. The algorithm is stable and converges quickly, usually within five iterations. A double-blind evaluation on a set of clinical MRA cases shows that a completely unsupervised version of the algorithm produces significantly better rank scores (P=0.038) when compared to angiograms produced manually by an experienced radiologist.     

cNO头颈鳞癌哨位淋巴结示踪法的研究进展

颈部哨位淋巴结是头颈部鳞癌最早发生转移的淋巴结,其所在位置及有无转移或微转移,是决定是否行区域性颈淋巴清扫的一个重要指标.对于哨位淋巴结阴性的cNO患者,为减少过度治疗,精确定位哨位淋巴结十分重要.目前多采用示踪法检测哨位淋巴结,本文就其判断cNO头颈鳞癌隐匿性转移的研究进展作一综述.     

国人C型肝性脑病发病诱因分析

目的了解国人C型肝性脑病发病诱因及相关因素。方法对国内已经发表的11个研究样本（患者总样本量1131例）进行综合分析。结果在9类纳入统计分析的诱因中：消化道出血占43．8％、各种感染占33．9％、电解质紊乱占29．1％、医源性因素占28．2％、饮食不节占14．2％、肾功能衰竭占13．0％，分居前6位，另外腹泻占2．4％，便秘占1．8％，原因未明／无占2．7％。其中医源性因素按照发生频率依次为：大量利尿和／或放腹水占14．5％、手术／创伤占6．0％，药物占4．5％，输血／输复合氨基酸占3．2％。结论警惕肝性脑病多种诱因的存在，尤其不能忽视医源性因素。按照发病概率积极寻找并消除诱因，对于改善顸后尤为重要。     

立体着床模型--小鼠囊胚与子宫内膜的共培养

目的:建立小鼠囊胚体外着床的三维模型,为着床机制的研究提供重要工具.方法:将小鼠囊胚与其自身子宫内膜分别共培养在空气、含500,750和950 mL/L O2的混合气体与组织培养液的气液界面上,比较不同O2浓度下小鼠囊胚的贴附率,确定体外共培养的最佳O2浓度;同时将确认有囊胚贴附的子宫内膜取出作HE染色.结果:不同O2浓度下,囊胚的贴附率分别为64.75%,47.86%,42.37%和30.97%,x2检验提示其差异有显著性(x2=28.145,P=0.000);且随着混合气体中O2浓度的逐渐升高,囊胚贴附率呈逐渐降低趋势.因此50 mL/L CO2 950 mL/L空气对囊胚与子宫内膜的共培养是最有利的;同时,囊胚贴附子宫内膜后并无扩展行为而是直接侵入子宫内膜.结论:50 mL/L CO2 950 mL/L空气最有利于囊胚与子宫内膜的共培养;且囊胚贴附子宫内膜后不发生外延生长,而是直接侵入子宫内膜.本实验成功地建立了小鼠囊胚体外着床的三维模型.