Common Mechanisms of Dyspnea in Chronic Interstitial and Obstructive Lung Disorders

被引：192

作者：

Faisal, Azmy ^{[1
,2
,3
]}

Alghamdi, Bader J. ^{[1
,2
,5
]}

Ciayaglia, Casey E. ^{[1
,2
]}

Elbehairy, Amany F. ^{[1
,2
,4
]}

Webb, Katherine A. ^{[1
,2
]}

Ora, Josuel ^{[1
,2
]}

Neder, J. Alberto ^{[1
,2
]}

O'Donnell, Denis E. ^{[1
,2
]}

机构：

[1] Queens Univ, Dept Med, Resp Invest Unit, 102 Stuart St, Kingston, ON K7L 2V6, Canada

[2] Kingston Gen Hosp, Kingston, ON K7L 2V7, Canada

[3] Univ Alexandria, Fac Phys Educ Men, Alexandria, Egypt

[4] Univ Alexandria, Fac Med, Dept Chest Dis, Alexandria, Egypt

[5] King Saud Bin Abdulaziz Univ Hlth Sci, King Abdullah Int Med Res Ctr, Jeddah, Saudi Arabia

来源：

AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE | 2016年 / 193卷 / 03期

关键词：

chronic obstructive pulmonary disease; dyspnea; exercise; restrictive lung disease; RESPIRATORY MUSCLE-ACTIVITY; CHEST-WALL VIBRATION; AIR-FLOW LIMITATION; QUALITATIVE ASPECTS; EXERTIONAL DYSPNEA; DYNAMIC HYPERINFLATION; EXERCISE INTOLERANCE; BREATHLESSNESS; VENTILATION; PERCEPTION;

D O I：

10.1164/rccm.201504-0841OC

中图分类号：

R4 [临床医学];

学科分类号：

1002 ; 100602 ;

摘要：

Rationale: The mechanisms underlying dyspnea in interstitial lung disease (ILD) and chronic obstructive pulmonary disease (COPD) are unknown. Objectives: To examine whether the relationship between inspiratory neural drive to the diaphragm and exertional dyspnea intensity is different in ILD and COPD, given the marked differences in static respiratory mechanics between these conditions. Methods: We compared sensory-mechanical relationships in patients with ILD, patients with COPD, and healthy control subjects (n = 16 each) during incremental cycle exercise with diaphragmatic electromyography (EMGdi) and respiratory pressure measurements. Measurements and Main Results: In patients with mild to moderate ILD or COPD with similarly reduced inspiratory capacity, the peak oxygen uptake, work rate, and ventilation were lower (P < 0.05) than in healthy control subjects. EMGdi expressed as a percentage of the maximum (EMGdi/EMGdi,max), respiratory effort (esophageal pressure expressed as percentage of the maximum), andventilation were higher (P < 0.05) at rest, and during exercise in both patients with ILD and patients with COPD than in control subjects. Each of these measurements was similar in the ILD and COPD groups. A VT inflection and critically reduced inspiratory reserve volume occurred at a lower (P < 0.05) ventilation in the ILD and COPD groups than in control subjects. Patients with ILD had greater diaphragmatic activity, whereas patients with COPD had greater expiratory muscle activity. The relationship between dyspnea intensity and EMGdi/EMGdi,max during exercise was similar in all three groups. In ILD and COPD, descriptors alluding to inspiratory difficulty were selected more frequently, with a greater disparity between EMGdi/EMGdi,max and V-T. Conclusions: Disease-specific differences in mechanics and respiratory muscle activity did not influence the key association between dyspnea intensity and inspiratory neural drive to the diaphragm.

引用

页码：299 / 309

页数：11

共 40 条

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