Pursed-lip breathing in Asthma
Pursed-lip breathing (PLB) produces a positive air pressure which will help maintaining your airways open longer in ways that more carbon dioxide escapes which can be substituted with clean air. This method of breathing has several advantages especially to asthmatics. Some of them are listed below: breathing
� Increases the volume of inhaled and exhaled air (vital capacity)
� It helps each of the stale air to emerge from from lungs.
� It lengthens the time in which the airways remain open and so less effort is necessary for breathing.
� It leads to better alveolar exchange of gases and so more oxygen can type in the bloodstream plus much more carbon dioxide can exit.
� It relaxes the body by enhancing the parasympathetic nervous system.
Within an asthma attack, less air reaches the lungs because bronchiget inflamed and secrete excess mucus that makes one's body keep working harder to breathe.
Pursed-lip breathing makes breathing more efficient because it cuts down on the the energy for work to breathe by helping the utilisation of the diaphragm and also the intercostal muscles as opposed to chest and neck muscles.
Oxygen Saturation (SO2) refers back to the area of haemoglobin which is fully combined with oxygen. Oxygen Saturation falls in asthmatic attacks on account of airway obstruction.
PO2 (Partial Pressure of Oxygen) will be the level of oxygen contained in the bloodstream. It reflects the efficacy of lungs in getting oxygen into the blood external to. It falls in asthmatics especially in attacks.
Inhalation of air can be an active movement regarding the contraction of diaphragm and auxiliary muscles to produce negative pressure which pulls air to the lungs. Exhalation generally is a passive movement because air flows over the pressure gradient which doesn�t require energy and so no muscular activity is needed. Since inhalation is active and exhalation is passive, respirationinfluences the autonomous neurological system such as inhalation there is an rise in sympathetic activity while during exhalation it comes with an boost in parasympathetic activity. Thus heartbeat increases during inhalation as muscle sympathetic activity is suppressed and reduces during exhalationdue to muscle sympathetic activity.This is whats called respiratory sinus arrhythmia that's linked to vagal tonus.
PLB induces pulse rate changes just like what's observed in respiratory sinus arrhythmia. Many experts have linked to better efficiency in pulmonary gas exchanges, thereby producing better alveolar perfusion and ventilation. breathing