642 research outputs found
Throw Out Your Books: Designing Libraries for Their New Roles
Designing libraries based on student experience rather than book storage provides the potential to cater to a wider variety of students and learning styles, transforming libraries from an afterthought for prospective students to an asset for recruitment. This session will use recent library projects to study the effect of major program shifts on student behavior and discourse. We will look at both larger capital improvement projects and “small wins” that can be readily executed.
Learning Outcomes Pilot small library design projects on campus to see how students react and engage. Create a dialogue with library administrators and admissions/recruitment professionals to discuss how the library can become more of an asset. Engage campus leaders and students through workshops to imagine a new type of learning space for your campus. Develop a plan for the future of your library, even if it starts with “small wins”
Standardization of Prothrombin Time/International Normalized Ratio (PT/INR)
The prothrombin time (PT) represents the most commonly used coagulation test in clinical laboratories. The PT is mathematically converted to the international normalized ratio (INR) for use in monitoring anticoagulant therapy with vitamin K antagonists such as warfarin in order to provide test results that are adjusted for thromboplastin and instrument used. The INR is created using two major PT �correction factors�, namely the mean normal PT (MNPT) and the international sensitivity index (ISI). Manufacturers of reagents and coagulometers have made some efforts to harmonizing INRs, for example, by tailoring reagents to specific coagulometers and provide associated ISI values. Thus, two types of ISIs may be generated, with one being a �general� or �generic� ISI and others being reagent/coagulometer-specific ISI values. Although these play a crucial role in improving INR results between laboratories, these laboratories reported INR values are known to still differ, even when laboratories use the same thromboplastin reagent and coagulometer. Moreover, ISI values for a specific thromboplastin can vary among different models of coagulometers from a manufacturer using the same method for clot identification. All these factors can be sources of error for INR reporting, which in turn can significantly affect patient management. In this narrative review, we provide some guidance to appropriate ISI verification/validation, which may help decrease the variability in cross laboratory reporting of INRs. © 2020 John Wiley & Sons Lt
International survey on D-dimer test reporting: a call for standardization
D-dimer is the biochemical gold standard for diagnosing a variety of thrombotic disorders, but result reporting is heterogeneous in clinical laboratories. A specific five-item questionnaire was developed to gain a clear picture of the current standardization of D-dimer test results. The questionnaire was opened online (December 24, 2014-February 10, 2015) on the platform "Google Drive (Google Inc., Mountain View; CA)," and widely disseminated worldwide by newsletters and alerts. A total of 409 responses were obtained during the period of data capture, the largest of which were from Italy (136; 33%), Australia (55; 22%), Croatia (29; 7%), Serbia (26; 6%), and the United States (21; 5%). Most respondents belonged to laboratories in general hospitals (208; 51%), followed by laboratories in university hospitals (104; 26%), and the private sector (94; 23%). The majority of respondents (i.e., 246; 60%) indicated the use of fibrinogen equivalent unit for expressing D-dimer results, with significant heterogeneities across countries and health care settings. The highest prevalence of laboratories indicated they were using "ng/mL" (139; 34%), followed by "mg/L" (136; 33%), and "\ub5g/L" (73; 18%), with significant heterogeneity across countries but not among different health care settings. Expectedly, the vast majority of laboratories (379; 93%) declared to be using a fixed cutoff rather than an age-adjusted threshold, with no significant heterogeneity across countries and health care settings. The results of this survey attest that at least 28 different combinations of measurement units are currently used to report D-dimer results worldwide, and this evidence underscores the urgent need for more effective international joined efforts aimed to promote a worldwide standardization of D-dimer results reporting
Hybrid strategy for unstable patients with severe carotid and cardiac disease requiring surgery
Background: Concurrent severe carotid and cardiac disease is a challenging situation where staged surgery is probably the most common strategy. However, in patients with an unstable clinical presentation, the best approach is still a matter of debate. The aim of the study was to report in-hospital and midterm outcome in patients who received carotid artery stenting and synchronous cardiac surgery. Methods: From June 1998 to July 2012, 54 consecutive patients who were treated at a high-volume university medical center with this hybrid approach were included in the study. All of the patients received carotid angioplasty while being administered aspirin and regular unfractionated heparin. Then, all of the patients were immediately transferred to the operating room for coronary and/or cardiac valve surgery. All of the patients were administered aspirin and clopidogrel once bleeding was ruled out, after surgery. Results: There were 5 in-hospital surgical related deaths, and no patient suffered a stroke or required carotid urgent re-intervention. At follow-up (55 ± 28 months; range 1–144 months), there were no new neurological deficits, while one additional death occurred. Conclusions: In this series, synchronous carotid stenting and cardiac surgery were feasible with an acceptable complication rate in a high-surgical-risk population, which could not undergo staged procedures.
The arterial blood supply of the temporomandibular joint: an anatomical study and clinical implications.
Purpose: The aim of this study was to analyze three-dimensional images of the arterial supply to the temporomandibular
joint.
Materials and Methods: Ten patients (five men and five women, mean age 36 years) without signs or symptoms of
temporomandibular disorders, who underwent contrast-enhanced computed tomographic (CT) scanning with
intravenous contrast, were studied. The direct volume rendering technique of CT images was used, and a data set of
images to visualize the vasculature of the human temporomandibular joint in three dimensions was created. After
elaboration of the data through post-processing, the arterial supply of the temporomandibular joint was studied.
Results: The analysis revealed the superficial temporal artery, the anterior tympanic artery, the deep temporal
artery, the auricular posterior artery, the transverse facial artery, the middle meningeal artery, and the maxillary
artery with their branches as the main arterial sources for the lateral and medial temporomandibular joint.
Conclusion: The direct volume rendering technique was found to be successful in the assessment of the arterial
supply to the temporomandibular joint. The superficial temporal artery and maxillary artery ran along the lateral
and medial sides of the condylar neck, suggesting that these arteries are at increased risk during soft-tissue procedures
such as an elective arthroplasty of the temporomandibular joint
High temperature thermoreflectance imaging and transient Harman characterization of thermoelectric energy conversion devices
Advances in thin film growth technology have enabled the selective engineering of material properties to improve the thermoelectric figure of merit and thus the efficiency of energy conversion devices. Precise characterization at the operational temperature of novel thermoelectric materials is crucial to evaluate their performance and optimize their behavior. However, measurements on thin film devices are subject to complications from the growth substrate, non-ideal contacts, and other thermal and electrical parasitic effects. In this manuscript, we determine the cross-plane thermoelectric material properties in a single measurement of a 25 mu m InGaAs thin film with embedded ErAs (0.2%) nanoparticles using the bipolar transient Harman method in conjunction with thermoreflectance thermal imaging at temperatures up to 550K. This approach eliminates discrepancies and potential device degradation from the multiple measurements necessary to obtain individual material parameters. In addition, we present a strategy for optimizing device geometry to mitigate the effect of both electrical and thermal parasitics during the measurement. Finite element method simulations are utilized to analyze non-uniform current and temperature distributions over the device area as well as the three dimensional current path for accurate extraction of material properties from the thermal images. Results are compared with independent in-plane and 3 omega measurements of thermoelectric material properties for the same material composition and are found to match reasonably well; the obtained figure of merit matches within 15% at room and elevated temperatures. (C) 2014 AIP Publishing LLC
Severe combined hyperlipidaemia and retinal lipid infiltration in a patient with Type 2 diabetes mellitus
Severe combined hyperlipidaemia has occasionally been associated with infiltration of tissues in addition to arteries and the skin. We report a woman with Type 2 diabetes mellitus (DM) and severe combined hyperlipidaemia who developed retinal lipid infiltration, resulting in blindness. A 61-year-old woman with a 15-year history of Type 2 DM was admitted following a two-week history of progressive visual loss. Examination identified lipid infiltration into the retina. Phenotypically she had severe combined hyperlipidaemia with elevated IDL cholesterol and a broad beta band on lipoprotein electrophoresis, raising the possibility of familial dysbetalipoproteinaemia. However, gene sequencing analysis indicated that the patient was homozygous for the E3/E3 allele of the ApoE gene with no mutations detected in either the coding region or intron-exon boundaries. Her lipid profile improved following dietary therapy and gemfibrozil treatment, but this had little effect on either her fundal appearances or her visual acuity. Type 2 DM plays a vital role both in allowing expression of severe combined hyperlipoproteinaemia, in addition to serving as a risk factor for complications such as tissue infiltration
Expression of muscle-specific integrins in masseter muscle fibers during malocclusion disease.
Targeting CD83 in mantle cell lymphoma with anti-human CD83 antibody
Objectives: Effective antibody–drug conjugates (ADCs) provide potent targeted cancer therapies. CD83 is expressed on activated immune cells including B cells and is a therapeutic target for Hodgkin lymphoma. Our objective was to determine CD83 expression on non-Hodgkin lymphoma (NHL) and its therapeutic potential to treat mantle cell lymphoma (MCL) which is currently an incurable NHL. Methods: We analysed CD83 expression on MCL cell lines and the lymph node/bone marrow biopsies of MCL patients. We tested the killing effect of CD83 ADC in vitro and in an in vivo xenograft MCL mouse model. Results: CD83 is expressed on MCL, and its upregulation is correlated with the nuclear factor κB (NF-κB) activation. CD83 ADC kills MCL in vitro and in vivo. Doxorubicin and cyclophosphamide (CP), which are included in the current treatment regimen for MCL, enhance the NF-κB activity and increase CD83 expression on MCL cell lines. The combination of CD83 ADC with doxorubicin and CP has synergistic killing effect of MCL. Conclusion: This study provides evidence that a novel immunotherapeutic agent CD83 ADC, in combination with chemotherapy, has the potential to enhance the efficacy of current treatments for MCL
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