Bronchodilatation

Bronchodilatation, or bronchodilation, is a reduction in airway resistance caused by the relaxation of airway smooth muscle. It is the opposite of bronchoconstriction.^[1]^[2]

Medically, bronchodilatation is used in the treatment of certain respiratory disorders, where it can reduce respiratory symptoms and/or improve lung function. Pharmacologically, bronchodilatation is achieved via bronchodilators.^[1]^[2]

References

^ ^a ^b Almadhoun, Khaled; Sharma, Sandeep (2023), "Bronchodilators", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 30085570, retrieved 2023-12-20
^ ^a ^b Prakash, Y. S. (2013-12-15). "Airway smooth muscle in airway reactivity and remodeling: what have we learned?". American Journal of Physiology. Lung Cellular and Molecular Physiology. 305 (12): L912–L933. doi:10.1152/ajplung.00259.2013. ISSN 1040-0605. PMC 3882535. PMID 24142517.

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v t e Respiratory physiology
Respiration	breath inhalation exhalation obligate nasal breathing respiratory rate respirometer pulmonary surfactant compliance elastic recoil hysteresivity airway resistance bronchial hyperresponsiveness constriction dilatation mechanical ventilation
Control	pons pneumotaxic center apneustic center medulla dorsal respiratory group ventral respiratory group chemoreceptors central peripheral pulmonary stretch receptors Hering–Breuer reflex
Lung volumes	VC FRC Vt dead space CC PEF calculations respiratory minute volume FEV1/FVC ratio Lung function tests spirometry body plethysmography peak flow meter nitrogen washout
Circulation	pulmonary circulation hypoxic pulmonary vasoconstriction pulmonary shunt
Interactions	ventilation (V) Perfusion (Q) Ventilation/perfusion ratio V/Q scan zones of the lung gas exchange pulmonary gas pressures alveolar gas equation alveolar–arterial gradient hemoglobin oxygen–hemoglobin dissociation curve (Oxygen saturation 2,3-BPG Bohr effect Haldane effect) carbonic anhydrase (chloride shift) oxyhemoglobin respiratory quotient arterial blood gas diffusion capacity (DLCO)
Insufficiency	high altitude death zone oxygen toxicity hypoxia