Pulmonary Function Testing (PFT) is a standard test that can help diagnose chronic obstructive pulmonary disease (COPD). The results may also determine how severe your disease is, and how well treatment is working.
A main part of the testing involves placing your mouth over a mouthpiece, blocking your nose with clamps, inhaling as deeply as you can, and forcibly exhaling as long and hard as you can until no more breath comes out. These results are recorded.
FVC . Forced Vital Capacity. Total amount of air you can exhale after deep inhalation.
TLC . Total Lung Capacity. How much air remains in your lungs after you completely exhale.
RV . Residual Volume. Air that remains inside your lungs even after the most forcible exhalation. Some air stays inside to keep your lungs open.
FEV1 . Forced Expiratory Volume at the one second mark of FVC.
FEV1/ FVC . Expresses FEV1 as a percentage of the predicted value. This test is very sensitive, and a good m...
An insulin testis a blood test that measures the amount of insulin, a hormone that regulates blood sugar.
How the test is performed
Blood is drawn from a vein on the inside of the elbow or the back of the hand. The puncture site is cleaned with antiseptic, and an elastic band is placed around the upper arm to apply pressure and restrict blood flow through the vein. This causes veins below the band to fill with blood.
A needle is inserted into the vein, and the blood is collected in an air-tight vial or a syringe. After the blood is drawn, the band is removed to restore circulation. Then, the needle is removed, and the puncture site is covered to stop any bleeding.
For an infant or young child:
The area is cleansed with antiseptic and punctured with a sharp needle or a lancet. The blood may be collected in a pipette (small glass tube), on a slide, onto a test strip, or into a small container. Cotton or a bandage may be applied to the puncture site i...
Did you know that Linda Ronstadt, Mary-Louise Parker, Oprah, Kim Cattrall and George and Barbara Bush have thyroid disease? Probably not. Thyroid problems don't make the news, at least not as often as mental health issues do. But if you believe that you have clinical depression, or have been diagnosed with clinical depression, you should make sure that your doctor rules out thyroid disease as a cause or contributing factor.
We are all taught how our brain and the nerves in our body act as an electrical control system for everything we do, but we rarely learn about how our endocrine system controls all of the biological processes in our bodies. The endocrine system consists of a series of glands scattered throughout the body. These glands include the pituitary, the pineal, the hypothalamus, the thyroid, the parathyroid, the pancreas, the testes and ovaries, the liver, the adrenal glands and a host of lesser known glands. Each of these glands release hormones into our blood that ...
You should knowAnswers to your question are meant to provide general health information but should not replace medical advice you receive from a doctor. No answers should be viewed as a diagnosis or recommended treatment for a condition. Content posted by community members does not necessarily reflect the views of Remedy Health Media, which also reserves the right to remove material deemed inappropriate.