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Why is FEV1 low in asthmatics?
In asthmatics, the airways become narrowed due to inflammation and constriction of the smooth muscles around the airways. This leads to difficulty in exhaling air from the lungs, resulting in a lower FEV1 (forced expiratory volume in 1 second) value. Additionally, increased mucus production in the airways can further contribute to decreased airflow and lower FEV1 measurements in asthmatics.
What happened to the FEV1 percent as the radius of the airways was decreased?
FEV 1 (%) will decrease as the airway radius is decreased. FEV 1 (%) is the amount of air that can be expelled from the lungs in one second during forced expiration. If the airway becomes smaller, then the resistance to airflow will increase and FEV 1 (%) will become lower.
What is the reason for the decrease in concentration of N2 when the air passes from the atmosohere into the upper airways?
humidification
What is the percentage of African-American workers at airtran airways?
70 percent
What is the difference between the FEV1 and peak expiratory flow?
FEV1 (forced expiratory volume in 1 second) measures the amount of air a person can forcefully exhale in 1 second, which is an indicator of lung function. Peak expiratory flow (PEF) measures the maximum speed at which a person can exhale air during a forced breath, providing information on how well the airways are functioning. Both tests are used in the diagnosis and monitoring of respiratory conditions such as asthma and COPD.
Bronchial spasm decreased air movement air trapped alveoli?
Bronchial spasm can lead to a decrease in air movement through the bronchial tubes, causing air to become trapped in the alveoli. This can result in difficulty breathing and decreased oxygen exchange in the lungs, leading to symptoms like wheezing and shortness of breath. Treatment may involve bronchodilators to help relax the airways and improve airflow.
Why the results from the experiment suggest that there is an obstructive rather than restrictive pulmonary problem?
The results from the experiment indicate an obstructive pulmonary problem because there is a significant reduction in airflow, particularly during expiration, as evidenced by decreased forced expiratory volume (FEV1) relative to forced vital capacity (FVC). This pattern suggests that the airways are narrowed or blocked, making it difficult to exhale air fully. In contrast, restrictive pulmonary problems typically show a proportional reduction in both FEV1 and FVC, rather than a marked decrease in airflow. Thus, the specific airflow limitation points to an obstructive issue rather than a restrictive one.
What does ventilator peep do?
Positive End-Expiratory Pressure (PEEP) on a ventilator helps maintain airway pressure at the end of expiration, preventing the collapse of alveoli and promoting better gas exchange. By keeping the airways open, PEEP increases functional residual capacity and improves oxygenation. It can also reduce the work of breathing and enhance lung compliance in patients with respiratory distress or failure. However, excessive PEEP can lead to decreased cardiac output and barotrauma if not carefully monitored.
What was the Real reason concord was grounded?
British Airways officially stated reasons for ending Concorde flights were increased maintence expense and a decreased number of passengers (partly due to a Concorde crash in 2000, and to the decrease in air travel following the 9/11 attacks in 2001). While British Airways made a profit on Concorde flights, it has been suspected that they became convinced that it was even more profitable to fly the same passengers using conventional trans-Atlantic flights.
What causes inflammation constricted airways hoarseness and swollen glands in the throat?
can inflammation of the throat give cancer after a while, and what can i do to decrease inflammation of the throat
What does acetylcholine do to bronchioles?
Acetylcholine causes bronchoconstriction by binding to muscarinic receptors on smooth muscle in the bronchioles, leading to narrowing of the airways. This can result in difficulty breathing and decreased airflow to the lungs.
Why Would An Asthmatic Attack An Impact On The FEV And MVV?
During an asthmatic attack, airway inflammation and bronchoconstriction occur, which can significantly reduce airflow. This leads to a decrease in Forced Expiratory Volume (FEV), as the individual struggles to exhale forcefully due to narrowed airways. Additionally, the Maximum Voluntary Ventilation (MVV) may also be affected, as the ability to take in and expel air rapidly is compromised. Consequently, both FEV and MVV are diminished, reflecting the severity of the obstruction in airflow.
