Hi people...my names KLa and i'm from western australia. i've just turned 18 and in doing so moved from the childrens to the adults hospital. at the childrens hospital pfts were always measured in percent, my last one being 54%. not that im at the adults hospital they measure in litres...which i dont understand! i have recently been discharged from hospital with a pft of fev1 1.4 over fvc 1.9. everyone on here talks percent...so i was wondering why does everywhere else use percent and does anyone know how to convert litres?cheers!! <img src="i/expressions/face-icon-small-happy.gif" border="0">
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PFT: Percentage vs Litres
- Thread starter KLa
- Start date
KlaIm no expert by any means and someone else maybe able to chime in on this matter , but i know that there are two seperate set of values that drs. can base your "raw number" as expressed in liters. depending on which one of these averages you plug the number into you will get a different percentile of the predicted for a person of you height and age etc. the two formularies are based on varying values. basically many of the drs are starting to just look at the raw numbers because of how widely the percents very from the two systems.i was as you were hit with a percentage loss when i switched from "chrildrens" to "adult" setting. and again when my hopstial switched there system for transplant and research protocal. so from this i have learned to just ask the doc to convert it or ask your respiratory person for euither the chart or the formulary for what you used at your childrens hopsital so that you can realize some continuity when doing pfts cause i know for me that is where goals and a predictor of whether im sick or not. any other questions or anything i can help you with or you just want to chat drop me a line (grigsbone)take care bye for now SincerelyJoe 22 w/cf
it is still possible to work out your percentage, but u just get used to doing it in litres!!! in order to figure out your %, you need to know what your lung func SHOULD be in litres, and what it actually is, then its just a case of doing the maths! <img src="i/expressions/face-icon-small-smile.gif" border="0">
KLa,That is odd that they would not uise percent. I just switched ot the adult clinic a year ago and they use litres as well, but on the sheet it says both litres and percent.. Maybe try having a look at the form they print off after doing your PFTs. Thats the only way i would know othewise, is by peeking at them myself. Children's here used the percentags all the time too. But in both places the litres and percent were on the print out. Best wishes to you, Julie! 19 wcf, from BC Canada