谷氨酸对腺苷A2A受体调节一氧化氮合酶活力的影响

目的探讨谷氨酸是否能够影响腺苷A2A受体对一氧化氮合酶（NOS）活力的调节。方法用1000ng／ml脂多糖（LPS）刺激小胶质细胞，分别加入100nmol／L A2A受体激动剂CGS21680以及不同浓度的谷氨酸（0，1，0，25，0，5mmol／L）干预，观察NOS活力变化。结果LPS诱导NOS活力增高，激活A2A受体可以产生抑制作用；0，25及0．5mmoL／L谷氨酸和A2A受体激动剂同时存在时，NOS活力进一步增高。结论高浓度谷氨酸可逆转腺苷A2A受体激动剂抑制升高NOS活力的作用。     

Complete intestinal lavage in the complex treatment of incompetence of large intestine anastomoses

The work gives substantiation of using complete intestinal lavage for certain indications in the complex treatment of incompetent colonic anastomoses. The method was efficiently used in 6 patients.     

Severe odontogenic infections

Background : Severe odontogenic infections are serious potentially lethal conditions. Following the death of a patient in the authors' institution this study was initiated to determine the risk factors, management and outcome of a consecutive series of patients.
Methods : All patients admitted to the Royal Adelaide Hospital under the care of the Oral and Maxillofacial Surgery Unit with odontogenic infections in calendar year 2003 were investigated. Detailed information relative to their pre-presentation history, surgical and anaesthetic management and outcome was obtained and analysed.
Results : Forty-eight patients, 32M, 16F, average age 34.5, range 19 to 88 years were treated. All presented with pain and swelling, with 21 (44 per cent) having trismus. Forty-four (92 per cent) were as a result of dental neglect and four (8 per cent) were regular dental patients having endodontic treatment which failed. Of those known to have been treated prior to presentation, most had been on antibiotics. Most patients had aggressive surgical treatment with extraction, surgical drainage, high dose intravenous antibiotics and rehydration. The hospital stay was 3.3 (range 1–16) days. Patients requiring prolonged intubation and high dependency or intensive care (40 per cent) had longer hospitalization. No patient died and all fully recovered.
Conclusion : Severe odontogenic infections are a serious risk to the patient's health and life. Management is primarily surgical with skilled anaesthetic airway management. Antibiotics are required in high intravenous doses as an adjunct and not as a primary treatment.     

鼻咽癌CT灌注成像及其生物学相关性研究

目的研究鼻咽癌CT灌注值与肿瘤微血管密度（MVD）、肿瘤分期的关系，探讨多层螺旋CT灌注成像对鼻咽癌的临床应用价值。方法49例鼻咽部CT灌注检查中，鼻咽癌组30例，鼻咽癌放疗后组14例，正常鼻咽部5例，测量鼻咽癌和鼻咽黏膜位置的血流量（BF）、最大强化指数（PEI）、峰值到达时间（TTP）及血容量（BV）作为灌注指标，其中16例鼻咽癌活检组织行免疫组织化学CD34单抗染色后，Weidner方法计数MVD。各组灌注值比较行方差分析，CT灌注值、肿瘤分期与MVD之间行Spearman等级相关分析。结果49例中1例鼻咽癌灌注检查失败。鼻咽癌组（29例）肿瘤CT灌注值BF为（48．6±16．9）ml·100g^-1·min^-1，PEI为（32．3±7．9）HU，TTP为（17．5±4．9）s，BV为（12．8±4．4）ml·100g^-1；正常对照组（5例）BF、PEI、TTP、BV值分别为（15．9±5．9）ml·100g^-1·min^-1、（12.6±1．3）HU、（22．6±6．9）s、（3．5±0．5）ml·100g^-1；鼻咽癌放疗后组（14例）BF、PEI、TTP、BV值分别为（25．2±7．0）ml·100g^-1·min^-1、（19．8±5．9）HU、（22．6±4．3）s、（6．1±2．4）ml·100g^-1，三组各灌注值差异有统计学意义（P值均〈0．01）；相关分析显示，鼻咽癌组（29例）中TNM分期（其中Ⅰ期3例，Ⅱ期9例，Ⅲ期10例，Ⅳ期7例）与PEI和BV存在相关性（r值分别为0．48和0．50），与BF和TTP无明显相关性（r值分别为0．23和0．22）；16例鼻咽癌MVD为（30．8±12．6）个／高倍镜视野，与其BF（51．4±17．0）ml·100g^-1·min^-1、PEI（33．2±9．6）HU和TTP（16．3±4．1）8存在相关性（r值分别为0．85、0．60和0．78），与BV（13．2±5．6）ml·100g^-1弱相关（r=0．48）。结论鼻咽癌有着特征的CT灌注表现，多层螺旋CT灌注成像的灌注值可以反映鼻咽癌微血管密度特征，PEI和BV值与鼻咽癌的TNM分期存在一定的相关性。     

Effect of exogenous thyroxin on renal ion-regulating and acid-secreting functions in white rats

Experimental hyperthyreosis was stimulated by intraventricular injections of sodium solithyroxin (T4) suspension on 1% starch gel during 10 days at a dose of 10 microg/100 g of body mass (n = 15) or 20 microg/100 g of body mass (n = 15). Renal function was tested by 5 % water loading after 24 hrs. since the last T4 injection. Urine and blood plasma samples were analyzed for creatinine; in addition, urine was analyzed for sodium and potassium ions of titrated acids, ammonium cations, and pH. Thyroxin was found to decrease creatinine clearance and expedite renal excretion of sodium and potassium ions irrespective of the amount of exogenous T4; at the same time, exaggerated excretion of titrated acids and ammonium cations correlated with T4 dose.     

急性重症胆管炎的介入治疗

目的讨论经皮经肝穿刺放置引流管(简称PTCD)减压引流治疗急性重症胆管炎(简称AOSC)的可行性及疗效.方法 1996年3月～2001年4月行PTCD治疗AOSC病人15例,男10例,女5例,胆石症术后8例,胆管癌2例,胰腺癌3例,胆道畸形2例,其中4例放置了胆道内支架.结果 15例病人技术成功率100%,无1例出现穿刺置管所致的严重并发症.病情缓解后针对病因有8例行手术治疗痊愈,4例不能手术的肿瘤患者植入了胆道内支架,1例于置管后3d死于多脏器功能衰竭,2例置管引流病情稳定后因各种原因放弃继续治疗,保留引流管自动出院.结论 PTCD可有效降低胆管压力,缓解病情,降低AOSC的死亡率,为进一步的病因治疗创造条件.     

骨科手术患者术中自体血回输的临床观察

目的:探讨骨科手术患者术中自体血回输的临床效果,以期能减少异体血的用量。方法:将骨科择期手术患者,术中随机分为自体血回输组,及异体血输血组,比较两组术后24h伤口引流量、血常规等情况。结果:两组患者手术顺利,自体血回输组术中均未用异体血,但少数患者术后发生低凝状态,输入异体血。结论:术中自体血回输能减少异体血输入量,但须适当补充新鲜血浆和凝血因子。     

FasL基因表达对缺氧状态下直肠癌细胞增殖凋亡的影响

Objective To elucidate the effect of FasL gene expression on the proliferation and apoptosis of hypoxic rectal carcinoma cells. Methods The normoxic expression level of FasL in HR-8348 subtype cells (HR-8348B, HR-8348L, HR-8348F and HR-8348As) with different invasive power were verified by Western blot. Hypoxia models for HR-8348B, HR-8348L, HR-8348F and HR-8348As were constructed with chemical modeling, then the FasL levels in all groups at 12 h after hypoxia were quantitated by Western blot. Distribution of different cell life cycles was determined with flow cytometry. Cell reproductive activities were detected with MTT method, and cell apoptesis was assessed with TUNEL. Results FasL protein was pigmentized at the position of 40 000 by Western blot, and the expression level of FasL was significantly higher in HR-8348F cells than those in HR-8348B, HR-8348L and HR-8348As cells(F=361.149, P<0.01) in normoxia. At 12 h after hypoxia, the FasL level was also significantly higher in HR-8348F cells than those in other groups (F=278.766, P<0.01), but was not markedly different as compared to themselves in normoxia (t=1.762, P>0.05). The proliferation index was significantly higher in HR-8348F (60.43±3.72) than those in HR-8348B (40.01±3.30), HR-8348L (41.30±4.06) and HR-8348As cells (35.87±4.39), respectively (F=39.477, P<0.01). However, both inhibition rate of proliferation and apoptotic index were remarkably lower in HR-8348F (17.30±1.98 and 13.10±1.04) than those in HR-834B (33.70±4.33 and 21.60±1.31), HR-8348L (34.20±3.92 and 20.10±1.15), and HR-8348As (38.00±4.55 and 23.90±1.23), respectively (F=28.811 and 76.462, respectively, P<0.01). Conclusion The expression enhancement of intracellular FasL in rectal carcinoma in hypoxia can lead to accelerated proliferation and reduced apeptosis of cells, which will promote tumor cells to adapt microenvironmental hypoxia.     

组织工程小血管摩擦力测量方法的研究与应用

目的设计一套用于组织工程小血管内壁摩擦力测量的装置并对组织工程血管的材料进行初步的测量,以验证装置的可靠性和相关结论。方法根据血液动力学的原理,对血管的力学模型进行分析,确定组织工程血管内皮细胞摩擦力的测量方法,从而设计完成整套装置并对弹性元件进行测量,并进行组织工程降解材料聚羟基乙酸PGA构成的管状支架进行摩擦力的测量。结果设计完成了测量组织工程血管内壁摩擦力的实验装置,弹性元件的牵拉力与位移的关系呈良好的线性关系。聚羟基乙酸PGA管状支架的摩擦力随流速的增加而增加。结论测量组织工程血管内壁摩擦力的实验装置是可行的,聚羟基乙酸PGA管状支架的摩擦力与流速基本呈现线性关系。     

Outpatient Initiation of Insulin: A Nurse Practitioner Protocol

Noninsulin dependent diabetes (type II diabetes) is a chronic disease characterized by hyperglycemia. Clients can generally be controlled by diet and exercise or a combination of diet, exercise, and oral hypoglycemic agents. When this therapy is not effective in controlling the hyperglycemia, the health care provider must choose to initiate insulin therapy. Outpatient initiation of insulin is an alternative to hospitalization in the type II diabetic client. Clinical guidelines for the initiation of insulin on an outpatient basis and management of the diabetic client are presented.