Site Map

Home

About COPD

 

What Is It?/Who Develops It?

 

Should I See A Dr? (A Checklist)

 

Women & COPD

 

 

Talking To

Your Dr

 

Before You Go

 

Initial Visit Q's

 

Follow Up Visit Q's

 

What is a COPD Action Plan?

 

COPD Action Plan Link

Ask the RRT

 

 

Recent RRT Q&A's

 

Archived Q&A's (2008/09)

 

Archived Q's & A's (2010)

 

Archived Q & A's 2011

 

Archived Q & A's 2012

 

Medicines

 

 

The Different "Types"

 

Know Your Meds - A Reference Guide for Canadians

 

(pdf version)

 

Drug Names/Equivalents in Different Countries

 

Medical Acronyms

Are You Newly Diagnosed?

 

 

If Nothing Else, Read This

 

Just Between Us - From Your Fellow COPDer's

Breathing

 

Breathing Distress

 

Anxiety & Pursed Lip Breathing (PLB) (Part 1)

 

Pursed Lip Breathing   (Part 2)

 

Diagphagmatic Breathing

 

Exhale & Relax

Breathing Tests

(Understanding Them)

 

 

PFT (Pulmonary Function Test)

 

Spirometry Tests

 

Pulmonary Function 101 (Understanding How Your Lungs Work)

Finger Pulse Oximeters

 

About Them, Why Own One

Exercise

 

 

Why It's Important

 

 

Nutrition

 

 

Why It's Important

 

Nutritional Needs & Foods To Avoid

For COPD Caregivers & Support People

 

 

Dear family

 

Sick Lungs Don't Show

Lung Transplant

 

 

Lung Transplant Ctrs in Canada

 

Meet Melody (pre transplant ) The Waiting

 

Post Transplant Q's &A's of Melody

 

Follow a Couple of Tx Patients on Their Journey

This site & the information contained herein raymerd00@gmail.com

2005 - 2015

Pulmonary Function Tests (PFT) -

Part 1 - Spirometry

So, you’ve been told you have to have a Pulmonary Function Test or a Spirometry Test to check and see if you have COPD and to what extent. These tests are usually performed in a respiratory function lab by  qualified technicians who will guide you through them. The tests will check your air-flow, your lung volumes and your gas diffusion levels. They may or may not include an arterial blood gas test. We will be referring to the sample test below which is an actual PFT done at the QEII Respiratory Lab in Halifax, Nova Scotia. (Note:  the Numbers in Blue are not part of the lab print out  They are intended as reference to explain what they mean below)

We'll start with Spirometry: 

Disclaimer:  The information below is far from all inclusive.   Additionally it has NOT been reviewed by a Dr. It is intended solely for basic information purposes only. 

Spirometry:  This is one test that can also be performed in the doctor’s office if the doctor is so equipped or an asthma clinic.  It’s  a shorter,  simpler version of a PFT and though it doesn’t give as “complete” a picture as the PFT,  it can accurately tell a) whether you have COPD, b) whether there’s a reversible component as in asthma and c) at approx. what stage you are with COPD.

 Spirometry:  For this portion/test, reference everything ABOVE the Lung Volume. (This is usually the only values recorded on a Spirometry test) – Also; we will only be addressing the more important or significant numbers that many COPD patients are interested in.

Text Box: Ignore this portion for Spirometry

Spirometry: 

Before you take your test, you will be asked specific questions. The most important questions deal with your age, height and sex. From this information, a reference (ref) (column #7) or predicted number is determined. Your results are measured against these numbers.

#1 FVC - Forced Vital Capacity - the volume of air which can be forcibly and maximally exhaled out of the lungs until no more can be expired. It is usually measured in liters.

#2 FEV1 - Forced Expiation Value after 1 second - the volume of air which can be forcibly exhaled from the lungs in the first second of a forced expiratory maneuver. It too is measured in liters.

#3 FEV1/FVC - Forced Expiration Value after 1 second as a Percentage of Forved Vital Capacity- indicates what percentage of the total FVC was expelled from the lungs during the first second of forced exhalation.

Of these three, FEV1% is the one used by most COPD’ers to express their lung function. (Fig.1 – line #2 – column #12). When combined with your BMI (body mass index) and your "functional" dyspnea (shortness of breath) collectively, this is what indicates what "stage" you are in.

The standard below is what's been established by GOLD (Global Initiative for Obstructive Lung Disease) 2009

                   Stage                                         Degree                                           FEV1%

I

Mild

≥ 80% of Predicted

II

Moderate

50-80% of Predicted

III

Severe

30-50% of Predicted

IV

Very Severe

Less than 30% of Predicted or Less than 50% with Chronic Respiratory Failure

You will see Pre (#9) and Post (#11). The first time you take this test, you will establish a value for FEV1. This is your Pre-bronchodilator or inhaler value. You will then be given some puffs of a fast-acting inhaler and after twenty minutes you will take the test again. These results are your post-bronchodilator values and the difference between Pre  and Post are recorded. If your Post value of FEV1 is greater than 15%, you are considered to have an asthma component which can be reversed by inhalers. (In subsequent PFT’s or Spirometry tests you will probably not do a Pre and Post if it’s known that you do not have an Asthma component. You will see only Post results.)

Column (#10) gives us the % of predicated value before bronchodilator use. Column (#12) gives us the % of predicated value after bronchodilator use.

Column (#13) records the percentage change between Pre and Post values.

 

                             This way to Understanding a FULL PFT (Pulmonary Function Test)

 

This page was last updated April 4th, 2010

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Site Map

Home

About this Site

About Site Founder

Across Canada (COPD)

Pulmonary Rehab Facilities

Your Provincial Report Card

Provincial Health Ministers

Form Letters You Can Use

Socialized Medicine

Message Board/Forum

COPD in Canada & The World  Message Board/Forum open to the public-for patients - exchange info with your peers

Useful Links

 

Useful Resource Links 

 

COPD in Canada & The World Message Board Forum

 

General Info

 

 

 

References

/Bibliography

 

Report Broken Links

 

Newsletters

 

2013

Spring

Fall

2012

Spring

Summer

 Fall

2011

Spring

Summer  Fall/Winter

2010

Spring 

Summer

Fall     Winter (Dec)

2009

Spring,   Summer, Fall   Winter

2008

Spring,   Summer, Fall   Winter

COPD Pamphlets

 

 

It Could Be COPD

 

What Can I Do?

 

Has Closed

 

About

 

Full Contact Listing