And why? I think so but Im not 100% sure so... any help on this topic is greatly appreciated.
2007-03-26 10:57:33 · 3 answers · asked by College Student 2 in Health ➔ Diseases & Conditions ➔ Respiratory Diseases
Yes.
People will "flow" issues can have normal vital capacity but impaired FEV. People with Flow issues typically have obstructive disorders. (Yet another reason to never, ever start smoking)
In the case of COPD, most folks who have it will have a very small FEV1 (the amount of volume moved after 1 second of forced exhalation)... but if you let them blow out long enough, their FVC (Forced Vital Capacity) can reach normal limits. If you ever watch an emphysematic blow out, you'll see how badly the flow is impaired (lack of elastic recoil). This is in fact, the reason ATS requires FVL (Flow Volume Loop) maneuver be greater than 6 seconds, and preferably greater than 8 seconds. However, if you're doing a SVC (Slow Vital Capacity) anyway, you can use that data to infer obstructive versus restrictive impairment.
That's about it in a nutshell. I'll see if I can dig up some graphs on-line to post in the source section.
Good luck.
2007-03-27 05:56:50 · answer #1 · answered by sam_of_losangeles 4 · 1⤊ 1⤋
Vital Capacity Normal Range
2016-12-30 08:43:43 · answer #2 · answered by suzette 3 · 0⤊ 0⤋
Normal Vital Capacity
2016-10-01 06:57:09 · answer #3 · answered by mcclair 4 · 0⤊ 0⤋