Medications

Oral corticosteroid bursts carry risk for severe adverse events

(HealthDay)—Prescriptions for oral steroid bursts are associated with a 1.8- to 2.4-fold increased risk for severe adverse events within the first month after initiation of drug therapy, according to a study published online ...

Diseases, Conditions, Syndromes

Defining paths to possible mother to child coronavirus transmission

UC Davis Health researchers took a critical step in defining the possible paths for the severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) causing COVID-19 to get transmitted from the mother to her newborn baby. ...

Diseases, Conditions, Syndromes

Virus outbreak could spin 'out of control' in South Sudan

It began with a dry cough, weakness and back pain. For Reagan Taban Augustino, part of South Sudan's small corps of health workers trained in treating COVID-19 patients, there was little doubt what he had.

Medical research

COVID-19 mouse model will speed search for drugs, vaccines

The global effort to quickly develop drugs and vaccines for COVID-19 has been hampered by limited numbers of laboratory mice that are susceptible to infection with SARS-CoV-2, the virus that causes COVID-19. Now, researchers ...

Diseases, Conditions, Syndromes

Can tear gas and pepper spray increase virus spread?

Police departments have used tear gas and pepper spray on protesters in recent weeks, raising concern that the chemical agents could increase the spread of the coronavirus.

Immunology

ANCA-associated vasculitis: The ADVOCATE study

ANCA-associated vasculitis (AAV) is a systemic disease involving the formation of special autoantibodies (so-called anti-neutrophil cytoplasmic antibodies/ANCA) and vascular inflammation. There are several diseases associated ...

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Respiratory tract

In humans the respiratory tract is the part of the anatomy that has to do with the process of respiration.

The respiratory tract is divided into 3 segments:

The respiratory tract is a common site for infections. Upper respiratory tract infections are probably the most common infections in the world.

Most of the respiratory tract exists merely as a piping system for air to travel in the lungs; alveoli are the only part of the lung that exchanges oxygen and carbon dioxide with the blood.

Moving down the respiratory tract starting at the trachea, the tubes get smaller and divide more and more. There are estimated to be about 20 to 23 divisions, ending up at an alveolus.

Even though the cross-sectional area of each bronchus or bronchiole is smaller, because there are so many, the total surface area is larger. This means there is less resistance at the terminal bronchioles. (Most resistance is around the 3-4 division from the trachea due to turbulence.)

This text uses material from Wikipedia, licensed under CC BY-SA