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Questions tagged [respiratory-system]

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1 answer
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What limits the VO2 (rate of oxygen consumption) in individuals?

I am quite confused regarding what limits the VO2 max, options are (1) number of mitochondria or (2) the ability of the cardiovascular system to deliver oxygen to tissues. I believe it should be the # ...
helplessstudent147's user avatar
1 vote
1 answer
33 views

Is there a nonchronic disease with similar effects to lungs like those of emphysema? [closed]

Can damage to the alveolar walls or reduction in the surface for gaseous exchange be reversible or can a non chronic disease cause these? If yes can you please name a condition in which these things ...
Alexander Pearson's user avatar
1 vote
0 answers
24 views

Why do obstructive lung diseases increase total lung capacity and residual volume?

The explanation I can find is that they restrict exhalation due to constricted airways. However, consequentially inspiration should be restricted too, right?
Ocelot's user avatar
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3 votes
1 answer
109 views

is there a way to approximate the waveform of PCO2 inside the lungs (alveolar PCO2), from a capnogram signal?

I'm doing a project modelling the human lung. This model considers two compartments - the lung and tissue compartments. In the model, the rate of ventilation is controlled only based on the ...
karun mathews's user avatar
11 votes
0 answers
144 views

Why is the flu more deadly to children than COVID-19?

Or better framed: Why are children not developing as severe reactions from COVID when they tend to fare much worse from seasonal flu? Is the answer something along the lines of: Those that don't die ...
Andrew Micallef's user avatar
1 vote
0 answers
38 views

What could cause the loss of dyspnea sensation in this historical account of drowning?

I'll start by invoking a century-old account of drowning from dr James Lowson. Many stories of people rescued from drowning follow a similar pattern. After what appeared to be ten or fifteen seconds, ...
user avatar
0 votes
1 answer
50 views

Is city air pollution causes allergy?

Is there any evidence (study) which shows correlation with city air to allergy (to anything) or any other breath health problems? If yes is this correlation different if someone lives in big city ...
Andrew Sasha's user avatar
1 vote
1 answer
123 views

Do oxygen and carbon dioxide move with Brownian motion? And, if so, do they get trapped by N95 masks?

Do oxygen and carbon dioxide move with brownian motion? And, if so, do they get trapped by N95 masks? Health professionals are experts agree: we should be wearing masks all day when in public during ...
Michael Altfield's user avatar
1 vote
0 answers
28 views

Why does the WHO's definition of respiratory droplets encompass such small diameters?

I frequently hear the World Health Organization (WHO) identify diameters of 5-10 μm as the size cutoff between "respiratory dropletes" and "droplet nuclei". For example, in a ...
Reed Espinosa's user avatar
1 vote
0 answers
10 views

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 ...
Kronimiciad's user avatar
4 votes
0 answers
45 views

Does being outdoors but in close proximity to someone make a difference in Covid-19 transmission?

In a recent news article I've read that Outdoor haircuts were allowed in California from Tuesday, under new rules announced by the mayor, but indoor salons remain shut. Is this kind of rule/...
against very long user names's user avatar
-1 votes
1 answer
54 views

Does COVID 19 hospitalization really helps? or not at all? [closed]

So I wanted to ask, given that most governments imposed quarantine in order to reduce risk of infection and/or not to overwhelm hospitals capacity, I wanted to know if it really makes a difference in ...
Adolf's user avatar
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2 votes
1 answer
82 views

Are (transparent) face shields without masks/respirators reasonably effective at preventing respiratory illness transmission?

You can see "splash guards" used by (almost) everyone in this video of a German tracing center, but (almost) nobody wears masks there. (Well, one spokesperson did wear mask and no shield.) So are ...
against very long user names's user avatar
2 votes
1 answer
59 views

Why is the immune response to RSV so short lived (and what else makes a vaccine for RSV difficult)?

From a Bio SE answer that doesn't delve into details on this (because it was a broad question on all "colds") one can't help but notice that RSV has the shortest antibody persistence listed in that ...
against very long user names's user avatar
1 vote
1 answer
48 views

Is there a term for this CPR technique that avoids direct respiration?

When I was performing NBC training (now called CBRN) in the military there was a technique used for when a person needed CPR and you were both wearing a gas mask (or the person was missing a nose and/...
mlhaufe's user avatar
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1 vote
1 answer
96 views

How is nitrogen not exchanged in respiration? [closed]

Air is 78% of nitrogen. When we inhale air, we inhale large amounts of nitrogen when compared to oxygen. How is nitrogen not exchanged? How is it exhaled?
RaMathuzen's user avatar
1 vote
2 answers
279 views

Bike pump as a ventilator?

I've been trying to think of the simplest, pre-existing item that could be used as a ventilator to support coronavirus patients that require it. I have come across this useful specification regarding ...
Will's user avatar
  • 11
0 votes
1 answer
121 views

Is open air spraying of disinfectant irritating the respiratory system and therefore increasing risk of infection such as COVID-19?

Recent articles and news items showed groups of people (mainly in Asia) spraying whole cities with disinfectant (as shown on a photo below). Apart from questions about the used substances, dose, ...
Bob Ortiz's user avatar
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1 vote
1 answer
58 views

What's the evidence for "flattening the curve" by social distancing measures in the context of contagious respiratory diseases?

This is more of Skeptics-style question, but since I only know of people on Stack Exchange challenging this (so it would not be a "notable claim" for Skeptics)... I'm asking here. For ...
against very long user names's user avatar
4 votes
1 answer
58 views

Does oxygen supplementation in case of pneumonia cause effects other than possibly preventing hypoxemia?

I've been reading about oxygen supplementation and have a question about the effects of oxygen supplementation in case of pneumonia. Patients with aspiration pneumonitis or pneumonia may progress to ...
Bob Ortiz's user avatar
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1 vote
0 answers
26 views

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 ...
Bob Ortiz's user avatar
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3 votes
1 answer
72 views

Would "working out" with a respiratory muscle training device improve survivability of ARDS in patients without access to a ventilator?

"Acute Respiratory Distress Syndrome" (ARDS) is characterized by a rapid onset of widespread inflammation of the lungs. The causes are many, and one such cause might become prominent in the near ...
Dale's user avatar
  • 115
0 votes
1 answer
191 views

What is the difference between Rhinitis, nasal congestion and runny nose?

Rhinitis, nasal congestion and runny nose → from prior reading on these terms I recognize somewhat inconsistency in regards to how people define them or use them in various articles. I personally ...
user avatar
3 votes
1 answer
43 views

Obstructive sleep apnea (OSA) - what level of respiratory dysregulation is involved and are respiratory stimulants relevant?

There are some people who when sleeping seem to power through obstructions to their breathing by breathing strongly such that they snore at a very loud volume. For people with obstructive sleep apnea ...
g491's user avatar
  • 323
2 votes
1 answer
97 views

Inspiratory and Expiratory Muscle Training

I'm interested in the scientific evidence of inspiratory and expiratory muscle training. There are various breathing training devices: According to their description, they enhance "strength and ...
user1170330's user avatar
5 votes
0 answers
71 views

When trapped in an air pocket does breathing slowly prolong the amount of time you have? [closed]

So there is roughly 21% oxygen in the air. When taking a "normal" breath you saturate your blood with oxygen and exhale air with roughly 16% oxygen. With that in mind, I am curious if changing your ...
Craig Smith's user avatar
4 votes
2 answers
68 views

What are clinically advised methods to improve nocturnal respiration other than CPAP?

Based on conventional medicine, what advice should a physician give a patient who experiences breathing difficulty during sleep that is not determined to require a CPAP machine and for which the root ...
Ryan Mortensen's user avatar
1 vote
0 answers
14 views

What is the difference between these two respiratory terms?

The difference between lung recoil pressure (Pel) vs Intrapleural pressure (Ppl).
Viv's user avatar
  • 111
2 votes
0 answers
49 views

Condition of mucus coated trachea, but clear lungs?

Is there a medical condition or illness (what's the terminology??) for when there is an acute incidence of when the trachea is coated with so much mucus and phlegm that it causes labored breathing and ...
Pills N Pillows's user avatar
1 vote
0 answers
17 views

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 ...
margalo's user avatar
  • 111