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Published 20 hours ago • verified publisher icon MIT-LCP

could not find P(A-a)O2 (AaDO2) in apacheApsVar

Open imzhizi opened this issue 6 years ago • 4 comments

Hi~ PaO2 and PAaO2 are used in ApacheIII, however, I can not find PAaO2 in the table apacheApsVar . Could you tell me how to get it? Thank you for any info.

imzhizi avatar Oct 09 '19 08:10 imzhizi

The APS var table only has variables in the acute physiology score.

PaO2 is in the overall APACHE equation, so it's in the pred var table: https://eicu-crd.mit.edu/eicutables/apachepredvar/

alistairewj avatar Oct 09 '19 12:10 alistairewj

I'm trying to calculate the ApacheIII. According to the rule, when fio2 >=50, P(A-a)O2 is used for scoring. I'm confusing that what i ask is P(A-a)O2 rather than PaO2, and I can not find it in the pred var table.

imzhizi avatar Oct 09 '19 12:10 imzhizi

Oh I see you are looking for AaDO2! I wasn't familiar with calling it P(A-a)O2. Not sure where it is - @obadawi ?

alistairewj avatar Oct 09 '19 12:10 alistairewj

If anyone else is looking for this information, I found a resource to calculate AaDO2 from the variables included in apacheApsVar. See https://icucycle.com/wp-content/uploads/2018/06/PROSPECT-APACHE-II-Calculation-Worksheet.pdf

which provides the following equation:

Oxygenation: [A-aDO2 = (FiO2 x 710) – (PCO2 x 1.25) – PO2]

brendamcgrath avatar Feb 09 '22 21:02 brendamcgrath