Airflow Obstruction
Airflow Obstruction - Related Videos
02:19
Unilateral Ureteral Obstruction Murine Model: A Surgical Procedure to Obstruct the Urinary Flow from a Kidney in Mouse Models
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2023
This video demonstrates the procedure to generate a unilateral ureteral obstruction mouse model. The procedure involves cutting one of the ureters of the mouse to obstruct urine flow.
14:05
A Murine Model of Irreversible and Reversible Unilateral Ureteric Obstruction
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Cited by 47 •
2014
The murine model of irreversible unilateral ureteric obstruction (UUO) is presented together with the model of reversible UUO in which the ureteric obstruction is relieved by anastomosis of the severed ureter into the bladder. These models enable the study of renal inflammation and scarring as well as tissue remodeling.
07:42
Nerve-sparing Mid-urethral Obstruction (NeMO) in Female Small Rodents
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Cited by 7 •
2017
Traditional modeling of partial bladder outlet obstruction in rodents is fraught with animal mortality. A denervation injury from dissection around the proximal urethra and bladder neck is also of major concern. We developed and evaluated a safe and reliable mid-urethral obstruction model, avoiding the shortcomings of the traditional model.
01:11
Pyloric Obstruction
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2026
Pyloric obstruction, also referred to as gastric outlet obstruction, is a condition characterized by narrowing or blockage at the pylorus—the muscular valve regulating the flow of stomach contents into the duodenum. When this passage becomes impaired, the stomach cannot effectively empty its contents into the small intestine. This disruption leads to a range of gastrointestinal symptoms, including early satiety, bloating, epigastric pain, postprandial nausea, persistent vomiting, and...
01:29
Intestinal Obstruction I: Introduction
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2026
Intestinal obstruction is a partial or complete blockage of the small or large intestine that disrupts the normal flow of intestinal contents through the lumen. This interruption impairs digestion, absorption, and fluid balance, and may lead to serious complications if not treated promptly.Mechanical ObstructionMechanical obstruction occurs when a physical blockage prevents intestinal contents from passing, arising from within the lumen or the bowel wall, or from external compression.Adhesions,...
FAQs
Airflow obstruction becomes especially limiting during expiration because narrowed airways, blockages, or reduced elastic support increase resistance as air leaves the lungs. For a given pressure gradient, the resulting flow is therefore lower than expected. This mechanical relationship explains why expiratory airflow is important when characterizing the problem and assessing its physiological effect.
Reduced elastic support can allow the airway to narrow more readily, increasing resistance to expiration. In airflow obstruction, this mechanism acts alongside airway narrowing or blockage, so the same pressure gradient produces less flow. Recognizing the mechanical contribution helps researchers connect airway structure with measured breathing performance.
The key distinction is the pattern of airflow measured during lung function testing. Spirometry can help separate obstructive from restrictive patterns rather than treating every ventilation problem as the same. That comparison supports assessment of physiological impairment and helps researchers relate test findings to underlying respiratory mechanics.
Spirometry provides a way to measure airflow during breathing and determine whether results fit an obstructive or restrictive pattern. In studies of airflow obstruction, those measurements can also support assessment of severity. The technique therefore connects a physiological mechanism with quantitative evidence used in respiratory research and evaluation.
Repeated airflow measurements can show whether respiratory function changes after treatment, making them useful for evaluating response. In asthma and chronic obstructive pulmonary disease, spirometry provides a structured way to compare observed airflow patterns and severity over time. The resulting measurements help relate treatment-associated changes to the underlying respiratory problem.
It provides a link between airway structure, breathing mechanics, and gas exchange. When reduced airflow limits ventilation, researchers can examine how the respiratory system supports oxygen delivery and carbon dioxide removal under altered conditions. This makes airflow obstruction relevant not only to disease characterization, but also to broader studies of respiratory physiology.