203 research outputs found
Endoscopic tympanoplasty vs microscopic tympanoplasty in tubotympanic csom: a comparative study of 44 cases
Background: Tympanoplasty is one of the commonest operations performed on the middle ear. Endoscopes are increasingly used for various middle ear surgeries. The objective was to determine merits and demerits of the endoscope as compared to the microscope in myringoplasty surgery and to compare the results of both group.Methods: Between the time period of January 2014 to September 2014, 44 patients underwent myringoplasty, 22 were endoscope assisted and 22 were microscope assisted. Results of surgery were compared at the end of 3 months post surgery.Results: In both groups, equal number of patients i.e. 15 (68.18%) had a successful outcome.Conclusion:Panoramic, wide angle, and magnified view provided by endoscope as well as ability to easily negotiate through EAC and provide uninterrupted image overcomes most of the disadvantage of microscope. In our study success rate was equal between endoscopic and microscopic technique. In terms of morbidity and postoperative recovery endoscope produced better results. Loss of depth perception and one handed technique are some of the disadvantage of endoscope that can be overcome with practice. Thus, Endoscopic tympanoplasty can be a good alternative of microscopic tympanoplasty
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Consumer Prices for Surgical Management of Ankle Arthritis: Limited Availability and Wide Variability.
Background: Healthcare costs for the surgical management of ankle arthritis continue to rise. Patients are generally unaware of the prices of the services they use. Understanding the costs associated with surgical management of ankle arthritis is an important facet of patient care. The purposes of this study were to (1) determine the access to the surgical cost of total ankle arthroplasty (TAAs) and ankle arthrodesis and (2) the variability of the price between the two procedures.
Methods: Fifty foot and ankle centers (25 academic, 25 private) that perform TAAs and ankle arthrodeses were contacted using a standardized patient script. The described patient was a 63-year-old man who had failed conservative treatment of ankle arthritis. Each institution was contacted up to three times in an attempt to obtain a full-bundled surgical quote for a TAA and an ankle arthrodesis.
Results: Twenty-one centers (42%, 14 academic, 7 private) were able to provide a quote for a TAA and an ankle arthrodesis. The mean bundled price for a TAA was 25,744), with the mean academic and private center quote being 37,937, respectively. The mean bundled price for an ankle arthrodesis was 26,033), with the mean academic and private center quote being 29,037, respectively. No statistically significant difference was found between the bundled prices for TAA and ankle arthrodesis.
Discussion: This study demonstrated limited availability of consumer prices for TAA and ankle arthrodesis. When comparing different institutions for surgical management of ankle arthritis, there was a wide range of quotes for both TAA and ankle arthrodesis. When comparing the choice of surgical management for ankle arthritis, no statistically significant difference was observed in price between TAA and ankle arthrodesis
Faster linearizability checking via -compositionality
Linearizability is a well-established consistency and correctness criterion
for concurrent data types. An important feature of linearizability is Herlihy
and Wing's locality principle, which says that a concurrent system is
linearizable if and only if all of its constituent parts (so-called objects)
are linearizable. This paper presents -compositionality, which generalizes
the idea behind the locality principle to operations on the same concurrent
data type. We implement -compositionality in a novel linearizability
checker. Our experiments with over nine implementations of concurrent sets,
including Intel's TBB library, show that our linearizability checker is one
order of magnitude faster and/or more space efficient than the state-of-the-art
algorithm.Comment: 15 pages, 2 figure
Conservation laws of semidiscrete canonical Hamiltonian equations
There are many evolution partial differential equations which can be cast
into Hamiltonian form. Conservation laws of these equations are related to
one-parameter Hamiltonian symmetries admitted by the PDEs. The same result
holds for semidiscrete Hamiltonian equations. In this paper we consider
semidiscrete canonical Hamiltonian equations. Using symmetries, we find
conservation laws for the semidiscretized nonlinear wave equation and
Schrodinger equation.Comment: 19 pages, 2 table
Approximation of excitonic absorption in disordered systems using a compositional component weighted CPA
Employing a recently developed technique of component weighted two particle
Green's functions in the CPA of a binary substitutional alloy we
extend the existing theory of excitons in such media using a contact potential
model for the interaction between electrons and holes to an approximation which
interpolates correctly between the limits of weak and strong disorder. With our
approach we are also able to treat the case where the contact interaction
between carriers varies between sites of different types, thus introducing
further disorder into the system. Based on this approach we study numerically
how the formation of exciton bound states changes as the strengths of the
contact potentials associated with either of the two site types are varied
through a large range of parameter values.Comment: 27 pages RevTeX (preprint format), 13 Postscript figure file
The effect of age on muscle characteristics of the abductor hallucis in people with hallux valgus: a cross-sectional observational study
Gene Expression Signature of DMBA-Induced Hamster Buccal Pouch Carcinomas: Modulation by Chlorophyllin and Ellagic Acid
Chlorophyllin (CHL), a water-soluble, semi-synthetic derivative of chlorophyll and ellagic acid (EA), a naturally occurring polyphenolic compound in berries, grapes, and nuts have been reported to exert anticancer effects in various human cancer cell lines and in animal tumour models. The present study was undertaken to examine the mechanism underlying chemoprevention and changes in gene expression pattern induced by dietary supplementation of chlorophyllin and ellagic acid in the 7,12-dimethylbenz[a]anthracene (DMBA)-induced hamster buccal pouch (HBP) carcinogenesis model by whole genome profiling using pangenomic microarrays. In hamsters painted with DMBA, the expression of 1,700 genes was found to be altered significantly relative to control. Dietary supplementation of chlorophyllin and ellagic acid modulated the expression profiles of 104 and 37 genes respectively. Microarray analysis also revealed changes in the expression of TGFβ receptors, NF-κB, cyclin D1, and matrix metalloproteinases (MMPs) that may play a crucial role in the transformation of the normal buccal pouch to a malignant phenotype. This gene expression signature was altered on treatment with chlorophyllin and ellagic acid. Our study has also revealed patterns of gene expression signature specific for chlorophyllin and ellagic acid exposure. Thus dietary chlorophyllin and ellagic acid that can reverse gene expression signature associated with carcinogenesis are novel candidates for cancer prevention and therapy
Comorbidity Burden in Trial-Aligned Patients with Established Gout in Germany, UK, US, and France: a Retrospective Analysis
Commercial Sales In Cable Television - An Overview And A Linear Model
This paper deals with the sales of commercial advertisements in the cable television industry. It describes in detail the dynamics of the entire process, and develops the notion of an audience loss function, the minimization of which is equally desirable to both networks as well as advertisers. A simple, yet robust linear model is described for optimizing this loss function, subject to the constraints that are typically inherent in the process. This is followed by a numerical illustration that uses real-world data, and a discussion on the use of the model. 1 Management Science Associates, Pittsburgh, PA 15232 2 Department of Industrial Engineering, University of Pittsburgh, Pittsburgh, PA INTRODUCTION In the United States, approximately 64 million households have access to cable television and there are approximately 80 channels which are carried by cable operators. New channels, both basic as well as premium, are sprouting by the day, and cable networks have shown a steady annua..
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