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Doctor insights on: Vital Capacity

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Why would a smoker may have a lower vital capacity?

Why would a smoker may have a lower vital capacity?

Structural damage: To the lungs. Smoking usually doesn't have effects of the vital capacity, but rather of the ability of the lungs to be elastic and push air out rapdily (forced vital capacity and expiratory volume). However, vital capacity can be affected by itself from smoking related damage. If you have a lower vc, your lungs are being damaged. Stop smoking, get help if you need it. Talk to doctor who did test. ...Read more

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How can asthma affect vital capacity?

How can  asthma affect vital capacity?

Slightly reduced: Asthma can cause a slight drop in vital capacity but a greater reduction in flow rates (such as fev1). Hence the ratio of fev1 to forced vital capacity is also reduced, suggestive of the characteristic pattern of obstruction. It is important to review the technique of pft to ensure adequate effort was put in while testing as that can also lead to falsely reduced vital capacity. Talk 2 yr lung doc. ...Read more

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Can low vital capacity be the effect of to less excercising for several years? Can excercising increase vital capacity?

Can low vital capacity be the effect of to less excercising for several years? Can excercising increase vital capacity?

Yes: There are many reasons for a decreasing vital capacity. Smoking, exposure to toxins, gasses, or airborne particles, and numerous diseases can affect this measure. You can improve this with exercise by improving your breathing muscles. ...Read more

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How bad does it mean when spirometry results only show the number 300 ml (vital capacity)? What is the average normal value for spirometry test?

How bad does it mean when spirometry results only show the number 300 ml (vital capacity)? What is the average normal value for spirometry test?

Depends on: The predicted normal lung function results are based on age, sex, ethnicity, gender, and height. Thus the normal value varies among individuals. You must have misread your vital capacity since no adult can live with a 300 ml vital capacity. Could it be 3, 000 ml? ...Read more

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I have pectus excavatum. Been told it's only cosmetic. But doesn't it affect my vital capacity in comparison to an exact individual without it?

I have pectus excavatum. Been told it's only cosmetic. But doesn't it affect my vital capacity in comparison to an exact individual without it?

No: Pectus excavatum is never clearly cosmetic. In children it can cause exercise intolerance, chest pain, and other symptoms. It can also have significant psychological issues that affect a child's development and socialization. New operations such as the nuss procedure make the correction much safer and of lower risk. The best age to repair is 11-15 years of age. ...Read more

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Vital capacity changed slightly, suggesting mild respiratory disturbance conductance (dvr) respiratory tract revealed. Doctor, what it means?

Vital capacity changed slightly, suggesting mild respiratory disturbance conductance (dvr) respiratory tract revealed. Doctor, what it means?

Makes no sense: Sounds like its been mis-read from a computer generated report. Double check the report wording. Then ask the doctor that did the study. Small changes in pfts are meaningless unless they are put into context, and even then they may not signify anything significant. ...Read more

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Vital capacity changed slightly, suggesting mild respiratory disturbance conductance (dvr) respiratory tract revealed. Result of spirometry, it means?

Vital capacity changed slightly, suggesting mild respiratory disturbance conductance (dvr) respiratory tract revealed. Result of spirometry, it means?

Makes no sense: This sounds like a computer generated report that might have been mis-interpreted by you. Regardless, minor changes in pfts cannot be interpreted out of context, just like strange noises your car makes cannot be diagnosed without looking at the car. ...Read more