scholarly journals Chronic obstructive pulmonary disease and smoking in COVID-19.

2021 ◽  
pp. 39-47
Author(s):  
A. Ishchenko
Keyword(s):  
Respiratory Function ◽  
High Probability ◽  
Literature Search ◽  
Chronic Obstructive ◽  
Extensive Literature ◽  
Direct Connection ◽  
Lethal Outcome ◽  
Obstructive Pulmonary Disease ◽  
Extensive Literature Search ◽  
The Relationship

COPD is a chronic disease that progressively worsens the patient's respiratory function. Infection with SARS-CoV-2 in a patient with COPD with initially low respiratory rates should theoretically lead to a more severe course and a high probability of lethal outcome. However, at present, no direct connection has been found between the presence of COPD, smoking and a high risk of being infected or severe course of SARS-CoV-2 infection. Of great importance in the study of these paradoxical facts is the interaction between the reninangiotensin and nicotinic cholinergic systems. In this review, we perform an extensive literature search for studies of the relationship between COPD, smoking, and SARS-CoV-2 infection.

scholarly journals Complexity Analysis of Surface Electromyography for Assessing the Myoelectric Manifestation of Muscle Fatigue: A Review

Entropy ◽  
2020 ◽  
Vol 22 (5) ◽  
pp. 529 ◽  
Author(s):  
Susanna Rampichini ◽  
Taian Martins Vieira ◽  
Paolo Castiglioni ◽  
Giampiero Merati
Keyword(s):  
Muscle Fatigue ◽  
Surface Electromyography ◽  
Literature Search ◽  
Complexity Analysis ◽  
Rehabilitation Medicine ◽  
Extensive Literature ◽  
Recurrence Plots ◽  
Semg Signal ◽  
Extensive Literature Search ◽  
The Relationship

The surface electromyography (sEMG) records the electrical activity of muscle fibers during contraction: one of its uses is to assess changes taking place within muscles in the course of a fatiguing contraction to provide insights into our understanding of muscle fatigue in training protocols and rehabilitation medicine. Until recently, these myoelectric manifestations of muscle fatigue (MMF) have been assessed essentially by linear sEMG analyses. However, sEMG shows a complex behavior, due to many concurrent factors. Therefore, in the last years, complexity-based methods have been tentatively applied to the sEMG signal to better individuate the MMF onset during sustained contractions. In this review, after describing concisely the traditional linear methods employed to assess MMF we present the complexity methods used for sEMG analysis based on an extensive literature search. We show that some of these indices, like those derived from recurrence plots, from entropy or fractal analysis, can detect MMF efficiently. However, we also show that more work remains to be done to compare the complexity indices in terms of reliability and sensibility; to optimize the choice of embedding dimension, time delay and threshold distance in reconstructing the phase space; and to elucidate the relationship between complexity estimators and the physiologic phenomena underlying the onset of MMF in exercising muscles.

scholarly journals Magnetic Suspension with Motorization to Measure the Speed of Gravity

2017 ◽  
Vol 45 ◽  
pp. 1760020
Author(s):  
Henrique Linares ◽  
Carlos Frajuca ◽  
Fabio S. Bortoli ◽  
Givanildo A. Santos ◽  
Francisco Y. Nakamoto
Keyword(s):  
High Speed ◽  
Literature Search ◽  
Magnetic Bearing ◽  
Magnetic Suspension ◽  
Extensive Literature ◽  
Sliding Bearing ◽  
Speed Of Gravity ◽  
Engineering Problems ◽  
Extensive Literature Search ◽  
Hybrid Bearing

This work aims to design a magnetic suspension for an experiment to measure gravitys velocity. Such device must rotate two objects symmetrically with the greatest mass and largest radius as possible, at the speed of [Formula: see text], which means this device falls into the high-speed machines category. The guidelines and solutions proposed in this paper constitute a contribution to this class of engineering problems and were based on an extensive literature search, contacts with experts, the tutors and author’s experience, as well as on experimental results. The main solution proposed is a hybrid bearing that combines a radial passive magnetic bearing with an axial sliding bearing, here called MPS (Magnetic Passive and Sliding) bearing.

scholarly journals Reproducibility and Respiratory Function Correlates of Exhaled Breath Fingerprint in Chronic Obstructive Pulmonary Disease

PLoS ONE ◽  
2012 ◽  
Vol 7 (10) ◽  
pp. e45396 ◽  
Author(s):  
Raffaele Antonelli Incalzi ◽  
Giorgio Pennazza ◽  
Simone Scarlata ◽  
Marco Santonico ◽  
Massimo Petriaggi ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Respiratory Function ◽  
Chronic Obstructive ◽  
Exhaled Breath ◽  
Obstructive Pulmonary Disease

The genus Carex (Cyperaceae) in Armenia

Phytotaxa ◽  
2021 ◽  
Vol 494 (1) ◽  
pp. 1-41
Author(s):  
JACOB KOOPMAN ◽  
TARON ALEKSANYAN ◽  
ALLA ALEKSANYAN ◽  
GEORGE FAYVUSH ◽  
MARINA OGANESIAN ◽  
...  
Keyword(s):  
Literature Search ◽  
Field Research ◽  
Extensive Literature ◽  
Extensive Literature Search

In this paper we present an updated checklist, key and maps for all the currently known Carex taxa present in Armenia. The present work is based on the revision of the vouchers in herbaria ERE, W and MW, extensive literature search, and field research carried out in 2015–2019. As a result, 71 species of Carex are known from Armenia. Besides, the first Carex hybrid in Armenia has been found and provided here with a binomial name.

scholarly journals THE RELATIONSHIP OF NT PRO BNP AND ECHOCARDIOGRAPHIC FEATURES OF RIGHT VENTRICLE DISFUNCTION WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE AT HAJI ADAM MALIK GENERAL HOSPITAL MEDAN

2020 ◽  
Vol 7 (12) ◽  
pp. 49-50
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Right Ventricular ◽  
Ventricular Dysfunction ◽  
Right Ventricular Dysfunction ◽  
Cardiovascular Complications ◽  
Chronic Obstructive ◽  
Pathological Findings ◽  
Obstructive Pulmonary Disease ◽  
The Relationship ◽  
Severe Copd

Background: Cardiovascular complications caused by Chronic Obstructive Pulmonary Disease (COPD) will affect structure and function of heart’s normal anatomy. This study aims to determine the relationship between the abnormality of NT Pro BNP levels and echocardiographic features of right ventricular (RV) dysfunction in COPD. Method: A cross-sectional study to assess the association between the abnormality of NT Pro BNP levels and echocardiographic features of right ventricular dysfunction in COPD in the outpatient unit of the Integrated Heart Center H. Adam Malik Hospital Medan. COPD patients were grouped based on GOLD criteria from spirometry examination into severe COPD (GOLD III) and very severe COPD (GOLD IV). Subjects then performed NT pro BNP and echocardiography examination to assess pathological changes in cardiac. Result: NT Pro BNP was higher in GOLD IV. Cut off value of NT Pro BNP > 172 pg/nl is the initial parameter of right ventricular dysfunction. Pulmonary hypertension was found in 93% of cases. The most common cardiac pathological findings were RV hypertrophy (71%), RV dysfunction (86.7%) and pulmonary regurgitation (87.5%). Pathological findings on echocardiography were more common in the GOLD IV group. COPD severity was associated with NT Pro BNP abnormalities (p <0.001) and associated with pathologic echocardiographic findings (p <0.001). Conclusion: Severe COPD is associated with increased NT pro-BNP abnormalities and pathological findings on echocardiography. Echocardiography facilitates early detection of cardiovascular complications in patients with severe and very severe COPD (GOLD III and IV).

scholarly journals Pulmonary comorbidity in chronic lymphoproliferative diseases: realities of the problem in the Dnipro region

2021 ◽  
Vol 26 (4) ◽  
pp. 62-67
Author(s):  
K.Yu. Gashynova  ◽  
G.V. Usenko
Keyword(s):  
Respiratory Function ◽  
Chronic Respiratory Disease ◽  
Community Acquired Pneumonia ◽  
Chronic Obstructive ◽  
Shortness Of Breath ◽  
Lymphoproliferative Diseases ◽  
Obstructive Pulmonary Disease ◽  
Pulmonary Pathology ◽  
Chronic Lymphoproliferative Diseases ◽  
Possible Cause

The prevalence of the chronic lymphoproliferative diseases is increasing worldwide with increase of the population age. It is known that the presence of comorbidities in such patients plays an important role in predicting treatment outcomes. The aim of the work was to study the prevalence and determine the structure of respiratory symptoms and comorbid pulmonary pathology in patients with chronic lymphoproliferative diseases (CLPD) in the Dnipro region of Ukraine. After analyzing 986 cards of inpatients of the hematology department, whose average age was 65 (56; 69) years, it was determined that 9.0% of patients had at least one chronic respiratory disease, the most common among which were chronic bronchitis, chronic obstructive pulmonary disease, as well as community-acquired pneumonia. Dyspnea and tachypnea are also common among patients with CLPD without established respiratory comorbidity, cardiovascular disease, or anemia. Based on the data obtained, we can recommend a study of the respiratory function and pulse oximetry, as well as a thorough collection of anamnesis of smoking and analysis of the results of chest computed tomography in all patients with CLPD in order to identify the possible cause of shortness of breath and establish the presence of respiratory comorbidity.

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