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It was not until a year later that Hugo Wilhelm von Ziemssen demonstrated diaphragm pacing on a 27-year-old woman asphyxiated on charcoal fumes by rhythmically faradizing her phrenic nerves, saving her life. [8] [10]: 49 Duchenne would later in 1872 declare the technique the "best means of imitating natural respiration". [11]
Air enters the lungs as the diaphragm strongly contracts, but unlike during traditional relaxed breathing the intercostal muscles of the chest do minimal work in this process. The belly also expands during this type of breathing to make room for the contraction of the diaphragm. [3]
Diaphragmatic excursion is the movement of the thoracic diaphragm during breathing. Normal diaphragmatic excursion should be 3–5 cm, but can be increased in well-conditioned persons to 7–8 cm. This measures the contraction of the diaphragm. It is performed by asking the patient to exhale and hold it.
Pursed-lip breathing increases positive pressure generated in the conducting branches of the lungs. [4] This can hold open bronchioles in patients with high lung compliance, such as those with emphysema. [4] Pursed-lip breathing also accesses the parasympathetic nervous system, which reduces stress during episodes of shortness of breath. [5]
Structure of diaphragm shown using a 3D medical animation still shot. The thoracic diaphragm, or simply the diaphragm (/ ˈ d aɪ ə f r æ m /; [1] Ancient Greek: διάφραγμα, romanized: diáphragma, lit. 'partition'), is a sheet of internal skeletal muscle [2] in humans and other mammals that extends across the bottom of the thoracic ...
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[12] [13] Diaphragm pacing is a technique used by persons with spinal cord injuries who are on a mechanical ventilator to aid with breathing, speaking, and overall quality of life. It may be possible to reduce reliance on a mechanical ventilator with diaphragm pacing. [ 14 ]
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