scholarly journals Factors for the Variability of Three Acceptable Maximal Expiratory Flow–Volume Curves in Chronic Obstructive Pulmonary Disease

2021 ◽  
Vol Volume 16 ◽  
pp. 415-422
Author(s):  
Masafumi Yamamoto ◽  
Satoshi Konno ◽  
Hironi Makita ◽  
Katsuaki Nitta ◽  
Kaoruko Shimizu ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Chronic Obstructive ◽  
Flow Volume ◽  
Obstructive Pulmonary Disease ◽  
Maximal Expiratory Flow ◽  
Expiratory Flow

scholarly journals Shape of the Expiratory Flow-volume Curve of Chronic Obstructive Pulmonary Disease and Interstitial Pneumonia Patients at Rest and during Exercise

2012 ◽  
Vol 27 (4) ◽  
pp. 379-383
Author(s):  
Masafumi NOZOE ◽  
Kyoshi MASE ◽  
Shigefumi MURAKAMI ◽  
Makoto OKADA ◽  
Tomoyuki OGINO ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Interstitial Pneumonia ◽  
Chronic Obstructive ◽  
Flow Volume ◽  
Obstructive Pulmonary Disease ◽  
Volume Curve ◽  
Flow Volume Curve ◽  
Expiratory Flow

scholarly journals Tidal expiratory flow limitation induces expiratory looping of the alveolar pressure-flow relation in COPD patients

2020 ◽  
Vol 129 (1) ◽  
pp. 75-83
Author(s):  
Matteo Pecchiari ◽  
Dejan Radovanovic ◽  
Camilla Zilianti ◽  
Laura Saderi ◽  
Giovanni Sotgiu ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Chronic Obstructive ◽  
Flow Limitation ◽  
Alveolar Pressure ◽  
Expiratory Flow Limitation ◽  
Obstructive Pulmonary Disease ◽  
Copd Patients ◽  
Expiratory Flow ◽  
Spontaneously Breathing

In stable chronic obstructive pulmonary disease (COPD) patients spontaneously breathing at rest, tidal expiratory flow limitation is the major determinant of the occurrence of expiratory looping in the plethysmographic flow-alveolar pressure diagram. In these patients the magnitude and the characteristics of the loop can be used as predictors of the presence of tidal expiratory flow limitation.

Forced Expiratory Flow Is Reduced by 100% Oxygen in Patients With Chronic Obstructive Pulmonary Disease

1995 ◽  
Vol 88 (4) ◽  
pp. 443-449 ◽  
Author(s):  
LTC JAMES E. JOHNSON ◽  
MAJ MARK D. PEACOCK ◽  
CPT JACKIE A. HAYES ◽  
MAJ MICHAEL J. MORRIS ◽  
MAJ GREGG T. ANDERS ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Forced Expiratory Flow ◽  
Expiratory Flow

scholarly journals Effect of manually assisted cough and mechanical insufflation on cough flow of normal subjects, patients with chronic obstructive pulmonary disease (COPD), and patients with respiratory muscle weakness

Thorax ◽  
2001 ◽  
Vol 56 (6) ◽  
pp. 438-444
Author(s):  
P Sivasothy ◽  
L Brown ◽  
I E Smith ◽  
J M Shneerson
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Flow Rate ◽  
Peak Expiratory Flow Rate ◽  
Respiratory Muscle ◽  
Normal Subjects ◽  
Chronic Obstructive ◽  
Respiratory Muscle Weakness ◽  
Obstructive Pulmonary Disease ◽  
Expiratory Flow

BACKGROUNDIt has been suggested that cough effectiveness can be improved by assisted techniques. The effects of manually assisted cough and mechanical insufflation on cough flow physiology are reported in this study.METHODSThe physiological actions and patient self-assessment of manually assisted cough and mechanical insufflation were investigated in 29 subjects (nine normal subjects, eight patients with chronic obstructive pulmonary disease (COPD), four subjects with respiratory muscle weakness (RMW) with scoliosis, and eight subjects with RMW without scoliosis).RESULTSThe peak cough expiratory flow rate and cough expiratory volume were not improved by manually assisted cough and mechanical insufflation alone or in combination in normal subjects. The median increase in peak cough expiratory flow in subjects with RMW without scoliosis with manually assisted cough alone or in combination with mechanical insufflation of 84 l/min (95% confidence interval (CI) 19 to 122) and 144 l/min (95% CI 14 to 195), respectively, reflects improvement in the expulsive phase of coughing by these techniques. Manually assisted cough and mechanical insufflation in combination raised peak expiratory flow rate more than either technique alone in this group. The abnormal chest shape in scoliotic subjects and the fixed inspiratory pressure used made effective manually assisted cough and mechanical insufflation difficult in this group and no improvements were found. In patients with COPD manually assisted cough alone and in combination with mechanical insufflation decreased peak expiratory flow rate by 144 l/min (95% CI 25 to 259) and 135 l/min (95% CI 30 to 312), respectively.CONCLUSIONSManually assisted cough and mechanical insufflation should be considered to assist expectoration of secretions in patients with RMW without scoliosis but not in those with scoliosis.

Genome-wide Linkage of Forced Mid-expiratory Flow in Chronic Obstructive Pulmonary Disease

2004 ◽  
Vol 170 (12) ◽  
pp. 1294-1301 ◽  
Author(s):  
Dawn L. DeMeo ◽  
Juan C. Celedón ◽  
Christoph Lange ◽  
John J. Reilly ◽  
Harold A. Chapman ◽  
...  
Keyword(s):  
Chronic Obstructive Pulmonary Disease ◽  
Pulmonary Disease ◽  
Chronic Obstructive ◽  
Obstructive Pulmonary Disease ◽  
Genome Wide ◽  
Expiratory Flow
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