As a systemic approach to consider the negative impact of middle turbinectomy MT), such as the excessive removal of turbinate, airflows inside a pre-surgery model and a series of virtual surgery models were numerically analyzed and compared.
UARS is not associated with apnea or diminished airflow, although snoring and excessive daytime somnolence (EDS) are common.
However, over time, excessive matrix deposition would lead to progressive fixed airflow obstruction, a feature characteristic of chronic steroid refractory asthma.
Uneven pressure distribution can cause insufficient exhaust airflows from hood fans, and can cause excessive exfiltration resulting in unwanted noise through any gap openings.
Importantly, excessive expiratory muscle recruitment has been shown in patients with airflow limitation to increase the oxygen cost of breathing threefold (Aliverti et al. 2004b).
It is characterized by recurrent airflow obstruction with symptoms and features such as excessive daytime sleepiness or hypersomnia, snoring, morning dry mouth upon awakening, and chest retraction during sleep [ 2].
Dissatisfaction was mostly caused by a lack of airflow and air movement in the space as well as excessive direct sunlight from the windows.
Firstly, work of breathing is increased as adipose tissue restricts the normal movement of the chest muscles and makes the chest wall less compliant, the diaphragm moves less effectively, respiratory muscles are fatigued more easily, and airflow in and out of the lung is impaired by excessive tissue in the head and neck area.
However, mucus that is excessive in amount or density cannot be cleared by ciliary action, blocking airflow and paradoxically providing a protected niche for microbial colonization.
The results showed that excessive and unevenly distributed water in different single PEM fuel cells could cause blockage of airflow or uneven distribution of air along the different flow channels.
Long-term occupational exposure to cotton dust that contains endotoxin is associated with chronic respiratory symptoms and excessive decline in forced expiratory volume in 1 sec (FEV1), but the mechanisms of endotoxin-related chronic airflow obstruction remain unclear.
