不同葡萄糖浓度全合一营养液体外稳定性评估

目的 评估不同时间点添加不同葡萄糖浓度全合一营养液的稳定性,为提高临床应用的安全性提供可靠依据.方法 根据临床应用情况,设计5组不同配方静脉营养液,其中葡萄糖终浓度分别为5％、10％、15％、20％和25％,其他营养素浓度每组相同.配制后的营养液于室温下（25±2）℃储存,分别在0、12、24、48、72 h时观察营养液外观变化,应用扫描电镜测量脂肪颗粒大小,并行营养液渗透浓度和pH值测定.结果 （1）肉眼观察各组营养液配制后0、12、24、48、72 h无颜色变化,未观察到沉淀、分层现象.（2）每组全合一营养液在不同时间点脂肪颗粒平均粒径值差异无统计学意义（F组内=1.255,P=0.324; F组间 =0.025,P=0.998; F交互=1.005,P=0.489）.72 h内,各组脂肪颗粒平均直径均＜0.5 μm,各组均未见到直径＞5.0 μm的脂肪颗粒.（3） 72 h内,所有营养液pH值波动于6.08 ±0.00～6.37±0.01之间.不同时间点5组营养液间pH值比较差异有统计学意义（F组内=3 452.846,P=0.000; F组间=4 655.250,P=0.000; F交互=1.952,P=0.079）.（4） 72 h内,所有营养液平均渗透浓度波动于（609.3±2.3）～（1 625.2±3.5） mOsm/L之间.不同时间点5组营养液间平均渗透浓度比较差异有统计学意义（F组内=176 195.911,P=0.000; F组间=14.732,P=0.006; F交互 =1.203,P=0.343）.结论 全合一营养液中葡萄糖终浓度为5％ ～ 15％时,脂肪颗粒、pH值和渗透压均在安全范围内.     

Daily Mean Temperature and Clinical Kidney Stone Presentation in Five U.S. Metropolitan Areas: A Time-Series Analysis

Background: High ambient temperatures are a risk factor for nephrolithiasis, but the precise relationship between temperature and kidney stone presentation is unknown.Objectives: Our objective was to estimate associations between mean daily temperature and kidney stone presentation according to lag time and temperatures.Methods: Using a time-series design and distributed lag nonlinear models, we estimated the relative risk (RR) of kidney stone presentation associated with mean daily temperatures, including cumulative RR for a 20-day period, and RR for individual daily lags through 20 days. Our analysis used data from the MarketScan Commercial Claims database for 60,433 patients who sought medical evaluation or treatment of kidney stones from 2005–2011 in the U.S. cities of Atlanta, Georgia; Chicago, Illinois; Dallas, Texas; Los Angeles, California; and Philadelphia, Pennsylvania.Results: Associations between mean daily temperature and kidney stone presentation were not monotonic, and there was variation in the exposure–response curve shapes and the strength of associations at different temperatures. However, in most cases RRs increased for temperatures above the reference value of 10°C. The cumulative RR for a daily mean temperature of 30°C versus 10°C was 1.38 in Atlanta (95% CI: 1.07, 1.79), 1.37 in Chicago (95% CI: 1.07, 1.76), 1.36 in Dallas (95% CI: 1.10, 1.69), 1.11 in Los Angeles (95% CI: 0.73, 1.68), and 1.47 in Philadelphia (95% CI: 1.00, 2.17). Kidney stone presentations also were positively associated with temperatures < 2°C in Atlanta, and < 10°C in Chicago and Philadelphia. In four cities, the strongest association between kidney stone presentation and a daily mean temperature of 30°C versus 10°C was estimated for lags of ≤ 3 days.Conclusions: In general, kidney stone presentations increased with higher daily mean temperatures, with the strongest associations estimated for lags of only a few days. These findings further support an adverse effect of high temperatures on nephrolithiasis.Citation: Tasian GE, Pulido JE, Gasparrini A, Saigal CS, Horton BP, Landis JR, Madison R, Keren R, for the Urologic Diseases in America Project. 2014. Daily mean temperature and clinical kidney stone presentation in five U.S. metropolitan areas: a time-series analysis. Environ Health Perspect 122:1081–1087; http://dx.doi.org/10.1289/ehp.1307703     

Improving services for prevention and treatment of substance misuse for Aboriginal communities in a Sydney Area Health Service

Introduction and Aims. Substance misuse among Aboriginal Australians is both a symptom of disadvantage and suffering but also a cause of health and social problems. Few data are available on how mainstream drug and alcohol services meet the needs of Aboriginal Australians. We assessed acceptability and accessibility of mainstream services for Aboriginal Australians with alcohol or drug use disorders in an urban Area Health Service (AHS). We identified priorities for improvement and an implementation plan. Methods. We collected feedback via consultation with client groups, with the Aboriginal community and community organisations, with staff of the AHS and of the local Aboriginal Medical Service (AMS) and through direct observation. We examined attendance data. Results. Aboriginal people were well represented in this mainstream service, partly because of existing collaboration with the AMS. Good points in the service were reported to be priority appointments for new Aboriginal clients, professional and caring service and collaboration with the AMS. Suggested improvements included increased cultural sensitivity of communication, more appropriate physical surrounds and printed materials, having Aboriginal staff available, peer support groups and integration of health care for individual, family and community. The action plan included increased recruitment and career opportunities for Aboriginal staff, strengthened partnerships with the Aboriginal community, including ongoing collaboration with the AMS in improving and monitoring mainstream service quality. Discussion and Conclusions. Given the adverse impact of substance use disorders, there is a pressing need for services to work with Aboriginal communities to optimise the quality of mainstream treatment services. [Teasdale KE, Conigrave KM, Kiel KA, Freeburn B, Long G, Becker K. Improving services for prevention and treatment of substance misuse for Aboriginal communities in a Sydney Area Health Service. Drug Alcohol Rev 2008; 27:152-159]     

Gangliosides GM1 and GD1b are antigens for IgM M-protein in a patient with motor neuron disease

We studied a patient with an IgM M-protein and lower motor neuron disease to identify the antigens to which the M-protein bound. Gangliosides from peripheral nerve and spinal cord were separated by high-performance thin-layer chromatography and immunostained with the patient's serum. The serum IgM immunostained two gangliosides identified as GM1 and GD1b, and immunostaining was specific for the M-protein light chain type. IgM-binding to the two gangliosides was detectable by ELISA at serum dilutions of greater than 1:10,000, and the M-protein was selectively immunoabsorbed by liposomes containing GM1 or GD1b. The IgM M-protein also bound to asialo-GM1, indicating reactivity to the galactosyl(beta 1-3)N-acetylgalactosaminyl moiety shared by GM1, GD1b, and asialo-GM1.     

用PCR检测尖锐湿疣患者的6,11型人乳头瘤病毒

应用聚合酶链反应（ＰＣＲ）技术对１９８例尖锐湿疣、凝尖锐湿疣患者进行ＨＰＶ－６，１１感染的基因诊断。结果ＨＰＶ－６，１１阳性１４２例，阳性率７１．７％（１４２／１９８）。其中尖锐湿疣患者１０６例，ＨＰＶ－６，１１阳性７６例，生率７１．７０％（７６／１０６）；疑尖锐湿疣患者９２例，ＨＰＶ－６，１１阳性６６例，阳性率７１．７３％（６６／９２）。说明无明显临床症状者，经ＰＣＲ技术检测可得到诊断。     

Rapid estimation of the accuracy of automatic blood pressure measuring devices (READ).

We propose a rapid method for the evaluation of automatic blood pressure measurement devices (READ) in response to the claim to simplify the validation of those devices. The READ is based on numerous blood pressure (BP) measurements at rest and during a standardised postural challenge in a small number of subjects who exhibit a wide range of BPs. Automatic (AU) and mercury sphygmomanometric (MS) brachial BP were measured simultaneously in a blinded manner. An average of 30 measurements per patient were done in 10-min while in a supine position, followed by 30 min in head-up tilt and again supine for 10 min. Two Collin-8800 automated oscillometric devices were tested with the aid of the READ in 15 adults. The consistency of the MS standard was demonstrated by duplicate MS measurements showing minimal inter-observer differences consistent with class A of the British Hypertension Society (BHS) grading system. AU-to-MS differences of 447 measurements were mean systolic deltaBP = 1.1 +/- 11.4 mm Hg and mean diastolic deltaBP = -13.36 +/- 8.9 mm Hg, classifying into category D of the BHS. Both tested instruments, each subject, each phase of the tilt test (supine I, tilt, supine II) and each mode of measurement (at 5-min intervals or continuously) equally qualified as 'D'. We conclude that the READ permitted us to identify quickly and at low expense a grossly inaccurate automatic BP measuring device. Further studies will show whether the READ can be efficient as a pre-validation test, post-validation test, and for assessment of ambulatory BP measuring devices.     

Expression of melanocyte-associated markers gp-100 and Melan-A/MART-1 in angiomyolipomas

 Angiomyolipomas are tumours of uncertain histogenesis, most often occurring in association with the kidney. A characteristic finding is their reactivity with HMB-45, a monoclonal antibody to the melanocyte-associated antigen gp-100. We tested 18 angiomyolipomas for their reactivity with A103, a monoclonal antibody to Melan-A (MART-1), another melanocyte-associated marker, and compared it with HMB-45. All cases were positive with both antibodies, yet most cases showed a more homogeneous staining pattern with A103. Normal kidney was immunohistochemically negative for both antibodies. We also performed RT-PCR assays for gp-100 and Melan-A in 4 of the 18 angiomyolipoma samples and in three normal kidney samples. All 4 angiomyolipoma specimens revealed mRNA for both melanocyte differentiation markers. gp-100 mRNA was found in the samples of normal kidney, but Melan-A mRNA was not. Our study shows that angiomyolipomas express the melanocyte-associated antigens Melan-A and gp-100 at the protein and at the mRNA level, suggesting a true expression of these antigens rather than cross-reacting epitopes. Based on the mRNA expression pattern, immunohistochemical analysis is the preferred method for the detection of gp-100, while Melan-A can be used at the protein and mRNA levels. Our study demonstrates that A103 is a useful marker for the diagnosis of angiomyolipomas. Received: 3 December 1998 / Accepted: 5 January 1999     

Timing of abnormal interventricular septal motion after cardiopulmonary bypass operations. Lack of injury proved by preoperative, intraoperative, and postoperative echocardiography

Abnormal interventricular septal motion after cardiopulmonary bypass is a widely known occurrence. The cause and exact timing of this phenomenon remain unclear. We have studied 21 patients prospectively with preoperative, intraoperative, and postoperative two-dimensional and M-mode echocardiograms. Intraoperative studies were obtained with the pericardium closed and open and after completion of procedures performed with cardiopulmonary bypass. Fourteen patients had coronary artery bypass graft operations alone. Six patients had valve replacement with or without coronary bypass, and one patient had removal of a left atrial myxoma. All patients had normal interventricular septal motion before the operation, and none had abnormal septal motion intraoperatively. Four to eight days postoperatively, the septum still thickened normally in all patients, with five patients having normal, nine patients abnormal, and seven patients paradoxical interventricular septal motion. Studies in 11 patients 1 to 4 months postoperatively showed no change from the early postoperative study. The pericardium was left open postoperatively in all patients. Six patients were studied a few hours after sternal closure and all had abnormal interventricular septal motion. We conclude that abnormal interventricular septal motion after cardiac operations is not due to injury of the septum, adhesion formation, or loss of pericardial constraint. Closure of the chest wall itself, with the pericardium left open, is associated with this abnormality.