# EtCO2 fraction
**URL:** https://discourse.kitware.com/t/etco2-fraction/494
**Category:** Pulse Physiology Engine
**Created:** [June 30, 2020, 7:25pm UTC](https://discourse.kitware.com/t/etco2-fraction/494 "2020-06-30T19:25:11Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@bob.marinier](https://discourse.kitware.com/u/bob.marinier)
#### Post date: [June 30, 2020, 7:25pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/1 "2020-06-30T19:25:11Z")
I’m running the Pulse 3.0 in Java with the Soldier@0s.json state file. I have a data request for EtCO2 like this:
```java
SEDataRequest etco2 = new SEDataRequest();
etco2.setCategory(eCategory.Physiology);
etco2.setPropertyName("EndTidalCarbonDioxideFraction");
etco2.setUnit("unitless");
dataRequests.getRequestedData().add(etco2);
```
When I get the data while the engine is running, this value hovers between 0.045 and 0.046, which seems very low. My understanding is that normal is 35-45% (0.35-0.45), which is an order of magnitude higher.
Is this a bug, or am I doing something wrong?
---
### Author:  [@coolwebb](https://discourse.kitware.com/u/coolwebb)
#### Post date: [June 30, 2020, 7:38pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/2 "2020-06-30T19:38:20Z")
That seems like the correct values. The accepted standard healthy EtCO2 values are 35mmHg-45mmHg, which equivalent to ~4%-6% or 0.04-0.06. You probably want to get “EndTidalCarbonDioxidePressure” with unit of “mmHg”.
---
### Author:  [@bob.marinier](https://discourse.kitware.com/u/bob.marinier)
#### Post date: [June 30, 2020, 7:46pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/3 "2020-06-30T19:46:05Z")
You are right! Thanks for helping me find my mistake 🙂
Btw, is there a comprehensive list of what properties can be requested? I was looking at [this](https://pulse.kitware.com/_scenario_file.html) and got myself confused. But even if I had noticed my error, I wouldn’t have known about this other property.
---
### Author:  [@bob.marinier](https://discourse.kitware.com/u/bob.marinier)
#### Post date: [June 30, 2020, 7:52pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/4 "2020-06-30T19:52:38Z")
With the correct data request, I’m getting a value between 34 and 35, which still seems slightly low, but maybe the soldier patient falls outside of normal because he’s unusually fit or something?
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### Author:  [@abray](https://discourse.kitware.com/u/abray)
#### Post date: [June 30, 2020, 8:18pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/5 "2020-06-30T20:18:36Z")
System and Compartment Data is described here
[https://pulse.kitware.com/physeng.html#SystemsInterface](https://pulse.kitware.com/physeng.html#SystemsInterface)
Follow the links to each system table to see all the strings supported
---
### Author:  [@bob.marinier](https://discourse.kitware.com/u/bob.marinier)
#### Post date: [June 30, 2020, 8:25pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/6 "2020-06-30T20:25:24Z")
I tried the links, but I get 403 permission denied errors.
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### Author:  [@abray](https://discourse.kitware.com/u/abray)
#### Post date: [June 30, 2020, 8:46pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/7 "2020-06-30T20:46:47Z")
Sorry about that
Try now, had to push a fix to the site
(Let us know of any other issues on the site if you see anything)
---
### Author:  [@bob.marinier](https://discourse.kitware.com/u/bob.marinier)
#### Post date: [June 30, 2020, 8:55pm UTC](https://discourse.kitware.com/t/etco2-fraction/494/8 "2020-06-30T20:55:45Z")
That’s working. Thanks!