scholarly journals Orbital Wegener's granuloma resulting from direct extension of nasal disease through a surgical rhinostomy

1998 ◽  
Vol 82 (2) ◽  
pp. 196b-196b ◽  
Author(s):  
A. S L KWAN ◽  
G. E ROSE
Keyword(s):  
Direct Extension ◽  
Nasal Disease ◽  
Wegener's Granuloma

Asymptotic behavior of repeated eigenvalues of perturbed self-adjoint elliptic operators

2021 ◽  
pp. 1-16
Author(s):  
Alexander Dabrowski
Keyword(s):  
General Type ◽  
Differential Operators ◽  
Laplacian Operator ◽  
Variational Characterization ◽  
Repeated Eigenvalues ◽  
Direct Extension ◽  
Asymptotic Formulae ◽  
Elliptic Differential Operators ◽  
Domain Perturbations ◽  
Boundary Deformation

A variational characterization for the shift of eigenvalues caused by a general type of perturbation is derived for second order self-adjoint elliptic differential operators. This result allows the direct extension of asymptotic formulae from simple eigenvalues to repeated ones. Some examples of particular interest are presented theoretically and numerically for the Laplacian operator for the following domain perturbations: excision of a small hole, local change of conductivity, small boundary deformation.

Intraorbital Abscess: A Rare Cause of Orbit Compression

FACE ◽  
2021 ◽  
pp. 273250162110050
Author(s):  
Samuel Ruiz ◽  
Rizal Lim
Keyword(s):  
Pediatric Population ◽  
Rare Complication ◽  
Disease Process ◽  
Rare Condition ◽  
External Drainage ◽  
Direct Extension ◽  
Life Threatening ◽  
History Of ◽  
High Index Of Suspicion ◽  
Prompt Diagnosis

Introduction: Intraorbital abscess is a rare complication of rhinosinusitis that affects most commonly the pediatric population. It is thought to be caused by direct extension or venous spread of infections from contiguous sites and can lead to life-threatening complications, like permanent visual loss and cerebral abscesses. Objectives: Intraorbital abscess is a rare condition that requires prompt diagnosis and treatment to avoid serious complications. Our objectives are to provide an overview of this rare disease process and its management including our successful treatment experience. Case Description: We present a 2 case report of a 13-year-old pediatric male and a 66-year-old male with history of chronic sinusitis who presented with a right intraorbital abscess successfully treated with external drainage with decompression of the orbit. Conclusion: When intraorbital abscess is encountered, a high index of suspicion is needed to allow prompt and accurate diagnosis for this infrequent condition. Timely surgical drainage of the abscess is needed to prevent the development of fatal complications.

scholarly journals Observables in inhomogeneous ground states at large global charge

2021 ◽  
Vol 2021 (8) ◽  
Author(s):  
Simeon Hellerman ◽  
Nozomu Kobayashi ◽  
Shunsuke Maeda ◽  
Masataka Watanabe
Keyword(s):  
Ground State Energy ◽  
Ground State ◽  
State Energy ◽  
Point Function ◽  
Ground State Configuration ◽  
Charge Densities ◽  
Direct Extension ◽  
Fixed Set ◽  
State Configuration ◽  
Large Charge

Abstract As a sequel to previous work, we extend the study of the ground state configuration of the D = 3, Wilson-Fisher conformal O(4) model. In this work, we prove that for generic ratios of two charge densities, ρ1/ρ2, the ground-state configuration is inhomogeneous and that the inhomogeneity expresses itself towards longer spatial periods. This is the direct extension of the similar statements we previously made for ρ1/ρ2 ≪ 1. We also compute, at fixed set of charges, ρ1, ρ2, the ground state energy and the two-point function(s) associated with this inhomogeneous configuration on the torus. The ground state energy was found to scale (ρ1 + ρ2)3/2, as dictated by dimensional analysis and similarly to the case of the O(2) model. Unlike the case of the O(2) model, the ground also strongly violates cluster decomposition in the large-volume, fixed-density limit, with a two-point function that is negative definite at antipodal points of the torus at leading order at large charge.

Canine Nasal Disease

2020 ◽  
Vol 50 (2) ◽  
pp. 359-374
Author(s):  
Leah A. Cohn
Keyword(s):  
Nasal Disease

Wegener’s granuloma harbors B lymphocytes with specificities against a proinflammatory transmembrane protein and a tetraspanin

2011 ◽  
Vol 36 (1) ◽  
pp. 87-90 ◽  
Author(s):  
Lorenz Thurner ◽  
Antje Müller ◽  
Martine Cérutti ◽  
Thierry Martin ◽  
Jean-Louis Pasquali ◽  
...  
Keyword(s):  
B Lymphocytes ◽  
Transmembrane Protein ◽  
Wegener's Granuloma

Approaches to the Identification and Recording of Nasal Lesions in Toxicology Studies

1991 ◽  
Vol 19 (4_part_1) ◽  
pp. 337-351 ◽  
Author(s):  
Kevin T. Morgan
Keyword(s):  
Bilateral Symmetry ◽  
Lesion Detection ◽  
Care Staff ◽  
Critical Feature ◽  
Adequate Knowledge ◽  
Nasal Disease ◽  
Systematic Nomenclature ◽  
Gross Lesions ◽  
Clinical Changes ◽  
Nasal Pathology

The identification, recording, and interpretation of nasal lesions can be a difficult task in toxicology studies. The objective of this article is to provide some guidelines for approaches to nasal toxicologic pathology, based on the author's experience and information available in the published literature. Identification of treatment-induced nasal lesions requires adequate in-life and post-mortem observation, and thorough histopathology. Histopathologic assessment is dependent upon high quality and consistent histologic preparations, adequate knowledge of nasal anatomy and histology, and experience with the range of aging, background, and treatment-induced lesions that may be encountered. In recent years there has been a marked increase in the number of articles reporting nasal pathology in studies for which materials were delivered by inhalation and by non-inhalation routes. Because of the increasing size of this database, it is recommended that standardized and systematic nomenclature be developed for these changes. The following points are considered to be particularly important: 1) alert animal care staff to clinical changes that may indicate nasal lesions; 2) screen animals for nasal disease, such as nasal nematodes in non-human primates; 3) record gross lesions during trimming of decalcified nasal tissues; 4) save spare tissue in fixative; 5) remember that the normal bilateral symmetry of the nose can be a valuable diagnostic aid; 6) avoid excessive lumping or splitting of diagnoses; 7) develop a logical order for recording of lesions (the approach preferred by the author is degenerative, inflammatory, regenerative, proliferative, for each of the epithelial types in a logical anatomical order, such as squamous, transitional, respiratory, and olfactory); 8) accurately determine the site of toxic responses; 9) keep a notebook of interesting or important observations and ideas if you are using a computerized data acquisition system; 10) consider the role of factors that may account for lesion distribution (regional dose and tissue susceptibility) during interpretation of tissue responses; and 11) during preparation of the descriptive narrative, clearly define what occurred, where and when it occurred, and consider the use of simple anatomical diagrams as an adjunct to the text. Adequate lesion detection and characterization by the toxicologic pathologist is often a critical feature of toxicology studies, and can play an important role in determination of human risks associated with exposure to xenobiotics. A systematic but flexible approach is recommended.

Nasal mucociliary clearance in patients with diabetes mellitus

1989 ◽  
Vol 103 (9) ◽  
pp. 853-855 ◽  
Author(s):  
W. L. Yue
Keyword(s):  
Diabetes Mellitus ◽  
Mucociliary Clearance ◽  
Mean Value ◽  
Nasal Disease ◽  
Patients With Diabetes ◽  
History Of ◽  
Insulin Dependent ◽  
Mucociliary Function ◽  
The Mean ◽  
Nasal Mucociliary Clearance

AbstractFifty insulin-dependent diabetics and 50 non-diabetics without a history of nasal disease have been studied for nasal problems including mucociliary function complicated by diabetes mellitus. For the diabetics, the mean value of nasal mucociliary clearance was considerably decreased and this was more often associated with dry noses but increased pH-values, both of which were higher than those for non-diabetics (p<0.05). As suggested in earlier literature, more aggressive nasal moistening therapy must be recommended for those patients presenting with these conditions in the light of systemic diabetic abnormalities.

scholarly journals Nonstationary First Threshold Crossing Reliability for Linear System Excited by Modulated Gaussian Process

2018 ◽  
Vol 2018 ◽  
pp. 1-17
Author(s):  
Rita Greco ◽  
Giuseppe Carlo Marano ◽  
Alessandra Fiore ◽  
Ivo Vanzi
Keyword(s):  
Linear System ◽  
Gaussian Process ◽  
Time Domain ◽  
Reliability Evaluation ◽  
Random Input ◽  
Common Assumption ◽  
Direct Extension ◽  
Threshold Crossing ◽  
The Time Domain

A widely used approach for the first crossing reliability evaluation of structures subject to nonstationary Gaussian random input is represented by the direct extension to the nonstationary case of the solution based on the qualified envelope, originally proposed for stationary cases. The most convenient way to approach this evaluation relies on working in the time domain, where a common assumption used is to adopt the modulation of stationary envelope process instead of the envelope of modulated stationary one, by utilizing the so-called “preenvelope” process. The described assumption is demonstrated in this work, also showing that such assumption can induce some errors in the envelope mean crossing rate.

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