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Capnography provides a rapid way to directly assess ventilation status and indirectly assess cardiac function. Clinical studies are expected to uncover further uses of capnography in asthma , congestive heart failure , diabetes , circulatory shock, pulmonary embolus , acidosis , and other conditions, with potential implications for the ...
The way that the pressure support ventilation works is by assisting the patient with a constant pressure until the patient's inspiratory flow falls below a threshold. The longer, deeper inspiratory flows by the patient will result in a larger tidal volume. This method of mechanical ventilation will help patients assume more work of breathing. [28]
It is an oscillation of ventilation between apnea and hyperpnea with a crescendo-diminuendo pattern, and is associated with changing serum partial pressures of oxygen and carbon dioxide. [ 2 ] Cheyne–Stokes respiration and periodic breathing are the two regions on a spectrum of severity of oscillatory tidal volume.
This matching may be assessed in the lung as a whole, or in individual or in sub-groups of gas-exchanging units in the lung. On the other side Ventilation-perfusion mismatch is the term used when the ventilation and the perfusion of a gas exchanging unit are not matched. The actual values in the lung vary depending on the position within the lung.
The disease puts strain on the heart, which may lead to heart failure and leg swelling. Obesity hypoventilation syndrome is defined as the combination of obesity and an increased blood carbon dioxide level during the day that is not attributable to another cause of excessively slow or shallow breathing. [2]
Cardiac asthma is the medical condition of intermittent wheezing, coughing, and shortness of breath that is associated with underlying congestive heart failure (CHF). [1]
In High-frequency oscillatory ventilation (HFOV) the airway is pressurized to a set mean airway pressure (called continuous lung-distending pressure) through an adjustable expiratory valve. Small pressure oscillations delivered at a very high rate are superimposed by the action of a “loudspeaker” oscillator membrane.
Cardiac physiology or heart function is the study of healthy, unimpaired function of the heart: involving blood flow; myocardium structure; the electrical conduction system of the heart; the cardiac cycle and cardiac output and how these interact and depend on one another.
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