Questions tagged [lungs]

Questions pertaining to each of the pair of organs situated within the rib cage, consisting of elastic sacs with branching passages into which air is drawn, so that oxygen can pass into the blood and carbon dioxide be removed.

26 questions with no upvoted or accepted answers
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What's caused by the chemicals, and what's caused by the smoke

The great many downsides of smoking are certainly well-documented by now (to say the least), but something I've struggled to find an answer to is the following: When looking at health risks of ...
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775 views

Carbon Dioxide Poisoning in Everyday Situations

I am wondering whether slight CO2 poisoning (hypercapnia) can be induced by everyday bad behaviour. I am particularly interested in the consequences of The prolonged use of a surgical mask (a.k.a. ...
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Is black spotting on the lungs a common benign variance, or a sign of pathology?

I recently found this article which shows an externally-healed lung donation before transplant. The left image is supposedly the lung pre-treatment, and right is post. In both of these images, black ...
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Are there probiotics for upper respiratory tract tissue?

If the lungs can be subject to bacterial infection, why do there not exist beneficial probiotics that live in lung tissue to combat "bad" bacteria proliferation?
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Is sinus mucus inhalation a high risk of pneumonia?

I understand that inhalation of food or stomach contents has a very high risk of causing pneumonia. Is routine sinus mucus , not caused by a cold of other illness, likely to cause pneumonia if inhaled ...
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Why oligohydramnios leads to hypoplasia of lung?

What I found for the question is that due to - Oligohydramnios reduces the intrathoracic cavity size, thus disrupting fetal lung growth and leading to pulmonary hypoplasia. decreased fetal breathing ...
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Does tidal volume have any significance in a pulmonary function test?

In a pulmonary function test (PFT) two important parameters are forced vital capacity (FVC), forced expiratory volume in one sec (FEV1). These are useful for diagnosing obstructive and restrictive ...
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40 y/o woman admitted with ARDS but normal values

Second year medical student asking: A 40 year old woman is admitted to the ICU with acute respiratory distress syndrome due to a life threatening case of pneumonia. Her respiratory values are as ...
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Is the IQOS heat-not-burn cigarette safe?

I am researching the topic of electronic cigarettes and have recognized that Philip Morris has recently introduced in some markets the IQOS heat-not-burn cigarettes. What is their safety profile in ...
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Will running next to a highway cause me to inhale more particulates?

I'm wondering if running next to a highway will cause humans to inhale more particulate matter and harmful substances.
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Why are inhaled corticosteroids not used in the treatment of pneumonia?

Common sense made me think of the need for inflammation reduction in case of pneumonia and the anti-inflammatory characteristics of inhaled corticosteroids. I Googled and found a study1 from 2017 that ...
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Effects of Exposure to Periodic, Long-term PM2.5 Pollution

The EPA's AQI quantifies air pollution, sets out ranges of pollution, and associates health risks with each range. Quoting from PurpleAir: "101-150: Members of sensitive groups may experience ...
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Is it possible, and what would be required to modify a ventilator to support two patients concurrently?

An article from a pediatrician on NYT suggested this as a possibility, I'm keen to know if it could be done in an emergency/shortage situation. If so: What would the challenges be from a mechanical/...
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Can bromhexine decrease severity of respiratory diseases and viral respiratory infections such as COVID-19?

According to this article https://www.vox.com/2020/3/3/21161724/coronavirus-symptoms-covid-19-sars-cough-fever one (less frequent) symptom of COVID-19 is thick mucus from coughs (sputum). Respiratory ...
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What's the primary body entrance + surface of infection for catching the flu?

I realize there are multiple ways, but if you tallied up all the people who caught the flu or a cold last year, what would be the majority... Entrance for infection: Mouth Nose Eyes Ears Skin Bio ...
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Why and how is it possible for one’s lungs to burst from breath-holding against a moderate decompression?

You often hear that you should never, ever hold your breath when the ambient pressure around you is decreasing at a significant rate (for instance, during egress from a submarine ten meters down, or ...
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What could cause a stroke soon after a lung transplant? Is it even known?

Recently a youtuber died of a thrombotic stroke a week after a lung transplant operation. Skimming over abstracts on Pubmed, it appears that strokes and more generally thrombosis is a frequent ...
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Amount of Bleeding from Wounded Lungs

For a game, I need at least a vague estimate on how much the lungs will bleed. One person mentioned that a deer shot through both lungs with a hunting rifle would be stopped by the bleeding within 10 ...
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Research paper on living in areas with fresh air after living for more than 20 years in polluted area and impact on health

Are there any reasearch paper which shows impact on health for the person which is moving from the city with high air pollution to the areas with more fresh air (like countryside)? Below are 2 main ...
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Have there been any tests of e-cigs vs cigarettes?

After some years of e-cigarette popularity, no labs have yet published side by side comparisons of cell cultures or mice exposed to 10 cigarettes per day, compared to 10 e-cigs. Many labs have ...
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Exercise-Induced Asthma Daily Medication Use Short and Long Term Effects?

I have Exercise-Induced Asthma. I only feel satisfied when I'm either exhausted or when my muscles won't push any further. In general I don't like medication, I've always at least tried to have my ...
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Why are lower respiratory infections so prevalent in undeveloped countries?

As you can see here, lower respiratory infections are a major cause of death in undeveloped and developing countries, especially in central Africa. What are the primary causes of lower respiratory ...
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59 views

What are the effects of regularly passively smoking marijuana?

Does the regular passive smoking of marijuana have specific effects in addition to those of passive cigarette smoking?
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47 views

Cardiopulmonary capacity assessment

Is it possible to determine someone's cardiopulmonary capacity from organ/tissue/blood samples alone? No other clues allowed. Think about a non cooperative patient, who can lie in an anamnesis, or ...
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What is the actual function of PGE2 on bronchial smooth muscles?

At first ,i have understood that PGE2 function on bronchial smooth muscle is relaxation of smooth muscles and it is even used as inhalant in case of bronchoconstriction (eg.asthma) Source:Katzung-...
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How much time can a human withstand without breathing? (after expelling all the air from the lungs)

How much time (how many seconds) can a human withstand without breathing? (after expelling all the air from the lungs)? Any paper? Thanks!