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Respiratory rate is the number of breathing cycles per unit time. It is one component of pulmonary ventilation, alongside the volume moved in each breath. Equal respiratory rates can therefore accompany different total airflow, and equal total airflow need not produce equal effective alveolar ventilation.
The subjective experience of uncomfortable breathing. It is distinct from an objectively measured breathing rate or oxygen level, although these observations can help explain it.
Pulmonary oedema occurring after re-expansion of a previously compressed or collapsed lung. It connects a change in lung mechanics with vascular leakage and differs from simply assuming all edema reflects cardiac failure.[ref]
Pleural Procedures by the British Thoracic Society (2023). Complications of pleural drainage
Use of ultrasound to investigate structures of the chest. Fluid and superficial interfaces can be examined directly, whereas air and bone restrict access to deeper structures.
Imaging that combines computed tomography with intravascular contrast to display blood vessels. It produces an anatomical view of contrast-filled vessels; image timing and spatial resolution affect which abnormalities can be seen.
Reduction of the drive or effectiveness of breathing, which can impair carbon dioxide elimination and oxygenation. It is a physiological effect with several causes, including some medicines and nervous-system disorders.
In current usage, usually viral upper-airway inflammation with a barking cough and stridor. Historical membranous croup could overlap with laryngeal diphtheria.
Inflammation involving the larynx and trachea. Viral laryngotracheitis is commonly described as croup; the anatomical term indicates the involved structures without uniquely specifying a pathogen.[ref]
Croup by the Royal Children's Hospital Melbourne. Background
Inflammation of the epiglottic and nearby supraglottic tissues, potentially obstructing the upper airway. The site differs from the predominantly subglottic narrowing of croup.[ref]
Acute upper airway obstruction by the Royal Children's Hospital Melbourne. Differential diagnosis
Bacterial infection and inflammation of the trachea, potentially narrowing the airway through swelling and secretions. It is distinct from ordinary viral croup despite overlapping noisy-breathing symptoms.[ref]
Acute upper airway obstruction by the Royal Children's Hospital Melbourne. Differential diagnosis
An inflammatory nasal syndrome with discharge and congestion, commonly associated with an upper respiratory infection. It describes symptoms and location rather than a unique causative microorganism.
Administration of oxygen to increase the oxygen available for gas exchange. The delivered concentration and the tissue response are different quantities; oxygen delivery does not by itself correct every cause of inadequate ventilation or blood circulation.
Pinned article: Introduction to the OurBigBook Project
Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
Intro to OurBigBook
. Source. We have two killer features:
- topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculusArticles of different users are sorted by upvote within each article page. This feature is a bit like:
- a Wikipedia where each user can have their own version of each article
- a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
Figure 1. Screenshot of the "Derivative" topic page. View it live at: ourbigbook.com/go/topic/derivativeVideo 2. OurBigBook Web topics demo. Source. - local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
- to OurBigBook.com to get awesome multi-user features like topics and likes
- as HTML files to a static website, which you can host yourself for free on many external providers like GitHub Pages, and remain in full control
Figure 2. You can publish local OurBigBook lightweight markup files to either OurBigBook.com or as a static website.
Figure 3. Visual Studio Code extension installation.
Figure 5. . You can also edit articles on the Web editor without installing anything locally. Video 3. Edit locally and publish demo. Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension. 
- Infinitely deep tables of contents:
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact