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[[File:DIY Altitude Training.JPG|none|thumb|800px]]
* '''Hypoxicator'''. You will need to build a hypoxicator, which is detailed under [[DIY Hypoxicator]]. This is the only bit of fabrication you'll need to do. This should only cost around $20 or so to build.
* '''CO2 Scrubber'''. As detailed in the [[DIY Hypoxicator]] instructions, the The CO2 scrubber is a consumable, so buy enough to last you for a few weeks. I typically buy 3-5 bags at a time. See [[DIY Hypoxicator]] for details on the CO2 scrubber and where to buy it.
* '''Pulse Oximeter'''. To monitor and control your altitude training, and to keep you safe, you need to measure your [[SpO2|SpO<sub>2</sub>]] with a [[Pulse Oximeter]]. You can get a good one for about $35, or one with a PC interface for recording and analysis with the [[Hypoxic Timer]] software for $85. Using this system without a [[Pulse Oximeter]] is dangerous as you may drop your [[SpO2|SpO<sub>2</sub>]] too low.
* '''Timer'''. You will need to time your hypoxic and recovery periods, either with a simple countdown timer or with some software like the [[Hypoxic Timer]] .
* The mouthpiece should plug directly into the antiviral filter so that there is very little unfiltered air in the system.
* All tubing and equipment should be cleaned periodically. You really don't want to breathe in any mold or bacteria.
* The CO<sub>2</sub> scrubber can produce Carbon Monoxide, but this appears to only occur if the CO<sub>2</sub> scrubber becomes desiccated (dried out) and comes into contact with anesthetic gasses<ref name="AhmedMannion2011"/>. As altitude training does not involve anesthesia (the primary use of CO<sub>2</sub> scrubber), this should not apply. However, if you're concerned, you can use a latest generation scrubber such as Amsorb Plus which does not produce carbon monoxide.
=Using the System=
* Connect all the parts as shown in the pictures above.
=IHE Plans=
Guidance on the plans for the pattern of hypoxic exposure and recovery can be found at [[Intermittent Hypoxic Exposure]].
=HypoxicTimer Hypoxic Timer =I've created a simple utility that interfaces to a [[Pulse Oximeter]] and displays the real-time [[SpO2|SpO<sub>2</sub>]], as well is calculating the hypoxic dose (Hypoxic Training index, or HTi). You can find more details at [[Hypoxic Timer]].)
{| class="wikitable"
|- valign="top"
|[[File:HypoxiaWithAltoLab.JPG|none|thumb|800px|Example of [[SpO2|SpO<sub>2</sub>]] from an IHE training session. The green vertical line marks the end of the hypoxic time and the red vertical line marks the beginning of the hypoxic time. The red line is [[SpO2|SpO<sub>2</sub>]], with the green fill showing above 90%, blue fill showing 90-75% and the pink fill showing below 75%. The blue line is heart rate.]]
|[[File:HypoxicTimer.jpg|none|thumb|500px| A screenshot of the hypoxic timer[[Hypoxic Timer]].]]|}oxy
=After Use=
After you've finished using the system, disconnect the parts to let them dry out. However, the hypoxicator should not be dried out as moisture is part of the CO2 scrubber. Put the hypoxicator into a plastic bag and seal it so that it is airtight. You will see quite a bit of condensation in the hypoxicator, which is quite normal.
|[[File:Ted DIY 2.jpg|none|thumb|500px|Bag close-up]]
|}
=References=
<references>
<ref name="AhmedMannion2011">Osman Ahmed, Stephen Mannion, The Cost Implications of Replacing Soda Lime with Amsorb Plus in Clinical Practice, ISRN Anesthesiology, volume 2011, 2011, pages 1–4, ISSN [http://www.worldcat.org/issn/2090-5548 2090-5548], doi [http://dx.doi.org/10.5402/2011/730483 10.5402/2011/730483]</ref>
</references>