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Comparison of Continuous and Discrete Measurements of Dyspnea During Exercise in Patients With COPD and Normal Subjects: Results

The absolute threshold for breathlessness was taken as the X variables accompanying the first time the black bar on the screen matched or surpassed the No. 0.5 (“just noticeable”) on the Borg scale. Starting with values beyond the absolute threshold, Read More

Comparison of Continuous and Discrete Measurements of Dyspnea During Exercise in Patients With COPD and Normal Subjects: Breathlessness

The subjects were told that they could use the entire scale including values between integers. For the continuous method, the subject adjusted the vertical length of a black bar (0.7 cm wide) on the screen by changing the location of Read More

Comparison of Continuous and Discrete Measurements of Dyspnea During Exercise in Patients With COPD and Normal Subjects:

Cardiopulmonary exercise testing was conducted while the subject was seated on the electronically braked cycle ergometer (Ergo-Metrics 800S; SensorMedics; Yorba Linda, CA) and breathing ambient air through a mouthpiece. Expired gas was analyzed for Ve and Vo2 with every breath, Read More

Comparison of Continuous and Discrete Measurements of Dyspnea During Exercise in Patients With COPD and Normal Subjects: Materials and Methods

Our specific hypotheses were as follows: (1) the continuous method provides high test-retest reliability that is at least comparable to the discrete method, (2) the slopes of the linear regressions for power production, oxygen consumption (Vo2), and minute ventilation (Ve) Read More

Comparison of Continuous and Discrete Measurements of Dyspnea During Exercise in Patients With COPD and Normal Subjects

Exercise testing provides a direct approach to examine an individual’s perception of breathlessness based on the principles of psychophysics. The traditional approach has been to ask the patient at specific time intervals (eg, each minute of an incremental or ramp Read More

The Overlap Between Respiratory Bronchiolitis and Desquamative Interstitial Pneumonia: Conclusion

Our study suggests that in some individuals with PLCH, extensive RB/ DIP-like changes may be the lesion responsible for the majority of physiologic and clinical abnormalities, rather than the lesions of PLCH. Irrespective of how one defines the final pathologic Read More

The Overlap Between Respiratory Bronchiolitis and Desquamative Interstitial Pneumonia: PLCH biopsy specimens

Whereas RB is an extremely common lesion that refers to the universal inflammatory reaction found in the respiratory bronchioles of cigarette smokers, RB-ILD is an uncommon ILD that occurs in a small proportion of smokers. In analogy to DIP, the Read More

The Overlap Between Respiratory Bronchiolitis and Desquamative Interstitial Pneumonia: Discussion

No correlation was found between the degree of RB/DIP-like changes and pulmonary function parameters, including TLC (r = — 0.22, p = 0.45), Dlco (r = — 0.42, p = 0.13), or FEV1 (r = 0.11, p = 0.71). Although Read More

The Overlap Between Respiratory Bronchiolitis and Desquamative Interstitial Pneumonia: Radiographic

Cystic change was identified as the sole HRCT abnormality in three cases. Ground-glass attenuation was detected on HRCT in three patients (Table 2). Emphysema was detected in two cases on HRCT (14%). Mild sub-carinal and pretracheal adenopathy (1 to 2 Read More

The Overlap Between Respiratory Bronchiolitis and Desquamative Interstitial Pneumonia: Clinical and Radiographic Characteristics

The second patient (patient 2 in Tables 1, 2) was a 48-year-old white man with a 30-pack-year smoking history referred for evaluation of progressive dyspnea. Although claiming to have quit smoking several months prior to evaluation, arterial blood gas analysis Read More

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