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Ahmed Salah
from Cairo, Egypt wrote on December 4, 2025
I don't really know how to start this off, but "thanks" is honestly the least I can say. I read your entire article titled "How anesthesia circle breathing systems work" twice. Once in July earlier this year, and again in December, since I was preparing for some veterinary board exams. And because the idea of inhalation anesthesia was always interesting and equally annoying, especially since I live in a country where such a machine is a bit too niche for veterinary patients. I only saw the machine once back in vet school, and it was never taught in any meaningful way. I got enrolled with the Canadian Veterinary Medical Association and have to pass some exams. I already did the first one, and it covers medical basics, including anesthesia. There was one question where I had to point a cursor at a specific item on a photo of an anesthesia... Read more
I don't really know how to start this off, but "thanks" is honestly the least I can say.
I read your entire article titled "How anesthesia circle breathing systems work" twice. Once in July earlier this year, and again in December, since I was preparing for some veterinary board exams. And because the idea of inhalation anesthesia was always interesting and equally annoying, especially since I live in a country where such a machine is a bit too niche for veterinary patients. I only saw the machine once back in vet school, and it was never taught in any meaningful way.
I got enrolled with the Canadian Veterinary Medical Association and have to pass some exams. I already did the first one, and it covers medical basics, including anesthesia.
There was one question where I had to point a cursor at a specific item on a photo of an anesthesia machine. Drumroll. It was the adjustable pressure-limiting valve. The question basically said the pressure in the bag was building up and about to explode, so I had to point to the thing we should adjust.
I’ve never seen a machine in real life except that one time back in vet school, so there I was, staring at an HD picture from a vet hospital, and I had to identify it. And I did. I guessed it based on the circuit system I had in mind, and it matched the descriptions perfectly. I checked again after the exam using Google Images, and I became pretty confident I chose the right thing.
Big thanks once again for your awesome notes and illustrations. I was really hopeful to find any topic about radiography and its physics, but couldn’t find anything as enjoyable as your content, so please consider making one.... Collapse
Michael Wall
from Los Angeles wrote on November 16, 2025
The reason I came here to read this is that while watching Apollo13 I found that a key step is missing, and it is missing from your article as well. They created a square filter holder that now is connected to a hose. How does the hose fit into the “round hole” of the lem Air scrubber? Im sure its obvious to some, but I dont know, was the lem air return path constructed with a convenient hose connector?
The reason I came here to read this is that while watching Apollo13 I found that a key step is missing, and it is missing from your article as well. They created a square filter holder that now is connected to a hose. How does the hose fit into the “round hole” of the lem Air scrubber? Im sure its obvious to some, but I dont know, was the lem air return path constructed with a convenient hose connector?... Collapse
Admin Reply by: notanrimepls
Please email me at the email on the contact page. i.e. web21@ ...............
Please email me at the email on the contact page.
i.e. web21@ .................. Collapse
Fernando
from Sao Paulo wrote on June 21, 2025
Greetins from Brazil, anesthesia resident here. Loved your explanation, thank you so much!
Greetins from Brazil, anesthesia resident here. Loved your explanation, thank you so much!... Collapse
Arun
from London wrote on June 2, 2025
Thanks so much for all your work on this site. I use it for my own learning and for teaching junior residents. Could you possibly do a section on lasers?
Thanks so much for all your work on this site. I use it for my own learning and for teaching junior residents. Could you possibly do a section on lasers?... Collapse
Mel
from Canada wrote on May 20, 2025
I am a Canadian anesthesia resident studying for the royal college exam, and this website has been a lifesaver to my co-residents and I! If you have a page on NIBP/arterial lines or neuromuscular monitoring, we would love to review it before our exam in a few months. Thanks for all the help!
I am a Canadian anesthesia resident studying for the royal college exam, and this website has been a lifesaver to my co-residents and I! If you have a page on NIBP/arterial lines or neuromuscular monitoring, we would love to review it before our exam in a few months. Thanks for all the help!... Collapse
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