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The closing capacity (CC) is the volume in the lungs at which its smallest airways, the respiratory bronchioles, collapse. It is defined mathematically as the sum of the closing volume and the residual volume. The alveoli lack supporting cartilage and so depend on other factors to keep them open.
A nitrogen washout can obtain the following parameters: Closing volume (CV); the amount of air remaining in the lungs beyond that of the residual volume when the flow from the lower sections of the lungs becomes severely reduced or halts altogether during expiration as the small airways begin to close.
The patient takes a series of normal tidal breaths for approximately one minute. During this tidal breathing, a series of rapid interruptions occurs, with a shutter opening and closing, measuring pressure and volume. [3] Lung volume measurements taken with cabinless plethysmography are considered equivalent to body plethysmography. [4]
2 This was the Dow's close at the peak on June 4, 1890. 3 This was the Dow's close at the peak on January 19, 1906. 4 This was the Dow's close at the peak on November 3, 1919. 5 This was the Dow's close at the peak of the 1920s bull market on Tuesday, September 3, 1929 before the stock market crash. This level would not be seen again until ...
Rather than using the open, high, low, and close values for a given time interval, candlesticks can also be constructed using the open, high, low, and close of a specified volume range (for example, 1,000; 100,000; 1 million shares per candlestick).
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Functional residual capacity (FRC) is the volume of air present in the lungs at the end of passive expiration. [1] At FRC, the opposing elastic recoil forces of the lungs and chest wall are in equilibrium and there is no exertion by the diaphragm or other respiratory muscles. [1]
An open-high-low-close chart (OHLC) is a type of chart typically used in technical analysis to illustrate movements in the price of a financial instrument over time. Each vertical line on the chart shows the price range (the highest and lowest prices) over one unit of time, e.g., one day or one hour.