Wednesday Checkup

posted June 19th, 2013, 2:01 am


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April 26th, 2013, 9:44 pm

GreenKrog

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Dad! I know you read this webcomic! I'm going to tell you ONE MORE TIME, this is NOT me. You are the best dad I could ask for. I love you and wouldn't trade you for any other dad on earth! So git it out of yer dang fool head right now!
(Well, ok, maybe a dad who didn't pass down depression in his genes. And a Y chromosome. But otherwise! :) )

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If you haven't been to a hospital in a while, they have these neat white pressure sensor things that they put over a digit. I think they operate by light to detect pulse. Anyways, they don't work if you have polish or press-ons.

Generally, a doctor will discuss treatments with a patient when it comes to certain medications. However, there aren't a whole lot of diuretics, and going with the one Dan is most familiar with is the best *medical* choice he could make. The fact that it also happens to have anti-androgenic effects is a bonus. It has no long-term effects on most people when it is used for only a short time. Guess Toni didn't read that part of the wikipedia article, huh?

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June 19th, 2013, 7:20 am

Noodlez

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I just got interested in how heart rate monitors work, but I found that some heart rate monitors on fingers work as a pulse oximeter as well!

I took a biophotonics course last semester, and they taught me about the pulse oximeter (might be the sensor that you used, or it's a heart rate monitor :P ). It works by shining light into the skin on the finger prints. The amount of light absorbed is dependant on a number of things, but variation comes from blood oxygen content. They take multiple readings a second to plot how the oxygen content changes with time then compares the peak and trough value to a chart which gives blood oxygen content! (in order to get the pulse it uses the period of the readings I think :P ) Apparently most nail polishes would not affect the result, but black apparently might affect the result a bit.

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June 19th, 2013, 12:32 pm

GreenKrog

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@Noodlez: I spent the morning looking through heart rate monitors to find the one I've seen used in Canadian hospitals. The closest I can find is the 'Smart Q Heart Rate Sensor'. It says that black nail polish can cause 'falsely low readings', which seems to be fairly across the board with most hard-case monitors.

For other colours and press-ons I can't find any contraindication. So the nurses I had in Montreal might not have had their information correct, or they were using really poor equipment.

The best part? I spent the morning reading about stuff I didn't know! Infrared radiation! Wee!

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June 19th, 2013, 4:03 pm

Noodlez

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@GreenKrog: If you want something really cool to read about, I suggest looking up nuclear fission. I took a lot of courses about it in university!

Basically neutrons (neutral charged sub atomic particles) are able to hit the nucleus of an atom. They have no repulsion or attraction, which is because they have no charge! When they hit a heavy atom (something with a lot of neutrons and protons) the atom becomes unstable, it will split apart, but the splitting is usually uneven, and there's a probability curve showing which products are most likely! This releases a lot of energy and 3 or 4 neutrons.

These neutrons will shoot off and ricochet or be absorbed by other atoms. A perfectly stable reactor will have 1 neutron survive from one fission event (breaking) in order to cause another fission event! If you don't control it, it can go out of control, but there are a lot of computer systems controlling the amount of neutrons making it to other "heavy atoms"

Just figured I should share :)

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June 19th, 2013, 4:09 pm

GreenKrog

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@Noodlez: Heh, nuclear, quantum, and theoretical physics are something I have studied in depth. I love how the universe operates (scientifically). I could tell you the exact breakdown of the Chernobyl events and what the purpose of the Higgs-Boson is.
Studying science is what I do when I'm bored or my finger hurts too much to draw.
..you'll actually see a number of really odd examples of stuff I've learned come up as Toni tutors people. :)

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June 19th, 2013, 4:13 pm

Noodlez

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@GreenKrog cool ^^ I actually just graduated from university, in engineering. Now I just need to find a job XD

I'll look out for some sciency stuff you hide in the comics in the future :P

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