Comparison Between Measurements of Functional Residual Capacity and Thoracic Gas Volume in Chronic Obstructive Pulmonary Diseases

Author(s):  
L. J. Corbeel
1982 ◽  
Vol 52 (4) ◽  
pp. 995-999 ◽  
Author(s):  
C. S. Beardsmore ◽  
J. Stocks ◽  
M. Silverman

Thoracic gas volume (TGV) was measured with a whole-body plethysmograph in 20 infants at functional residual capacity (FRC) and at a series of higher lung volumes achieved by artificial inflation of the lungs with known volumes of air after airway occlusion. There was a discrepancy between the corrected values of TGV measured at high and low lung volumes in nine infants; in six cases TGV measured at high lung volumes exceeded that measured at FRC, and in three cases it was reduced when compared with the measurement made at FRC. These changes were not related to age, size, or clinical status and could be explained by airway closure at FRC, combined with an uneven distribution of pleural pressure.


1962 ◽  
Vol 17 (6) ◽  
pp. 871-873 ◽  
Author(s):  
Donald F. Tierney ◽  
Jay A. Nadel

We made concurrent measurements of the functional residual capacity (FRC) with the body plethysmograph (thoracic gas volume) and by 7-min and prolonged open-circuit nitrogen dilution methods (communicating gas volume). The mean difference between the 7-min communicating gas volume and the thoracic gas volume in 13 healthy subjects was only 0.13 liters. The thoracic gas volume averaged 0.99 liters larger than the communicating gas volume after 7 min of O2 breathing in 13 patients with emphysema. The communicating gas volume at 12–18 min was the same as the thoracic gas volume in 11 of 13 patients but was smaller in the other 2. When the thoracic gas volume was used to measure FRC, the total lung capacity averaged 142% of predicted normal in 13 patients with emphysema. Submitted on January 4, 1962


2021 ◽  
Vol 6 (1) ◽  
pp. 1285-1290
Author(s):  
Nilam Kumari Jha ◽  
Komal Kant Jha

Introduction: Anxiety and Depression is a common comorbidity in chronic obstructive pulmonary disease patients. Impaired lung function is a risk factor for depression In COPD patients, reduced recreational activities and social Isolation is a major risk factor resulting in anxiety and depression.  Objective: The objective of this study is to evaluate the prevalence of Anxiety and Depression among the COPD patients at Pulmonology unit of Nobel Medical College Teaching Hospital.  Methodology: A hospital based cross- sectional research design was used for the study. A total of 185 patients with previously diagnosed COPD. Data were collected by using a face to face interview technique in patients to evaluate anxiety and depression using Nepali version of Hospital Anxiety and Depression Scale questionnaire at Nobel Medical College Teaching Hospital, Biratnagar, Nepal from May to August 2020. Data analysis were done by descriptive and inferential statistics.  Results: A total of 185 patients participated in the study, 157 patients (84.9%) had anxiety, 107 patients (57.8%) had depression and 102 patients (55.1%) had both anxiety and depression. There was statistically significant association of anxiety and depression in COPD patients with age, religion, occupation, smoking status, duration of illness, history of previous hospitalization, number of hospitalization in previous year, type of family, domiciliary oxygen therapy.  Conclusion: The study concluded that anxiety and depression had been most prevalent in COPD patients. Therefore health personnel working in the Pulmonology unit should be aware the early assessment and treatment of anxiety and depression of chronic obstructive pulmonary diseases patients. 


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