Pulmonary Function Tests or PFTs are a set of tests that are used to determine, measure or observe the functioning of the lungs. The most common pulmonary function tests used are spirometry, gas diffusion, and lung plethysmography. 

Highlights of pulmonary function tests

A spirometry test is used to measure the amount of air inhaled and exhaled. It also measures the amount of time taken to complete a respiration cycle.
A lung plethysmography measures the amount of air in the lungs after the patient has taken a deep breath. It also measures the amount of air that remains in the lungs after the patient has exhaled as much air as possible.
What does a Pulmonary Function Test measure?
Pulmonary function tests would not only check how well the person is breathing but also how effectively the lungs are able to conduct oxygen to the rest of the body. In addition to air flow, these tests would measure the size and volume of the lung and lung diffusion.

These tests can also be used to measure

Total Lung Capacity   the amount of air present in the lungs after breathing in deeply
Forced Vital Capacity   the amount of air that can be exhaled after breathing in deeply
Minute Volume   the amount of air exhaled per minute
Vital Capacity   the total volume of air that can be breathed out after inhaling as much as possible
Tidal Volume   the amount of air inhaled or exhaled when breathing normally
Maximum voluntary ventilation   the amount of air that can be inhaled and exhaled in one minute
Functional Residual Capacity   the amount of air that remains in the lungs when breathing normally
Forced Expiratory Flow   the flow or volume of air during an exhalation
Peak Expiratory Flow Rate   the rate at which a person can exhale
When are Pulmonary Function Tests recommended?
A physician might recommend a patient undergo a PFT as part of a routine physical check-up. This test would be advised if the patient is experiencing any symptoms associated with lung problems or disorders such as asthma, respiratory infections, chronic obstructive pulmonary disease, COPD. A doctor would also use these tests to monitor and check whether a certain treatment prescribed for a lung disease or condition is working effectively.

Pulmonary function tests are safe as they are non-invasive but it is important to follow the instructions of the doctor or technician before, after and during the test. It is important to make your doctor aware of any surgeries, respiratory infections, chest pains or heart attacks that you might have experienced before the test. If you are taking any medications you might need to follow the advice of the doctor as to whether you can take them before the test.

Your doctor would also advice you on how to prepare for the test such as not eating a large meal, avoiding caffeine and wearing loose-fitting clothes. If you have any doubts, concerns or queries discuss them with your doctor.

Pulmonary Function Tests - Why Is It Required?

Asthma is a respiratory disease that takes place with a variety of symptoms including breathlessness, wheezing and coughing. It usually occurs when the airways get obstructed, which in turn leads to inflammation of the tubes. So how can you recognise the signs and symptoms of asthma? here is a list of ways!

Risk identification: it has been observed by doctors and medical science that there is no specific reason for the onset of this ailment. It can be caused due to genetic as well as environmental factors. So, in order to recognise the symptoms, you will first of all have to take stock of both these factors. Find out if you have any blood relatives who have suffered from this ailment and try to find out how it started and at what age, so that you can watch out for the same warning signs. Also, if you are more prone than others when it comes to allergic conditions like rhinitis and atopic dermatitis, then you are at risk. Other risk factors also include living in a high pollution zone, as well as being overweight, smoking, working within close range of exhaust fumes and other chemicals, and other such factors.

Symptom identification: to be able to identify whether or not you are at risk, you must identify the potential symptoms including persistent shortness of breath, which may strike regularly. Also, another symptom is not being able to sleep comfortably due to excessive coughing and breath shortness as well as shallow breathing and wheezing. You may also experience some amount of chest tightening or constriction. These symptoms will usually get worse if you happen to be suffering from the flu or a cold. 

Respiratory health: if you are suspecting the onset of this disease, it would be a good idea to watch your respiratory health by observing the rise and fall of your breath when you are doing energy consuming and strenuous activities like exercising or other such tasks. Sports induced asthma is an actual condition that can get worse when your lungs are faced with cold and dry air. Also, if you are facing exhaust fumes and chemicals as a part of your job, then you are at risk of occupational asthma, in which case you should watch your respiratory health very closely. These symptoms can also get worse when you are around animals and pets due to the allergens that may trigger wheezing and coughing. A lung function test can be conducted by the pulmonologist in case you are suffering from any of these symptoms and conditions on a persistence and prolonged basis. 

Knowing and reporting your symptoms to the doctor is important for getting timely treatment.

How to Recognise Asthma?

Is your child getting exhausted after a bout of cough? Does he or she suffer from constant wheezing and tightness of the chest? Does your child feel drained out after climbing a flight of stairs? Do you know a child who always seems to run out of breath and cannot participate in school sports tournaments or play outside for a long time? The child could be suffering from asthma, which is a serious breathing problem. Most children are affected by asthma. Staying in a polluted city just makes the condition worse.

Asthma - Know the disease

Asthma is a condition that causes inflammation of the airways, known as trachea and bronchioles.
The muscles around the airways constrict and prevent the smooth flow of air.
The lining of the bronchioles swell and block the airways.
Asthma is mostly triggered by an allergic reaction.
There is a difficulty in breathing out. Exhalation of air is often accompanied by a wheezing, that is, a whistling sound.
There is a constant shortness of breath, feeling out of breath and gasping for air.
There is an uncomfortable tightness in the chest, the feeling of not breathing in enough air.
Coughing bouts in the middle of the night, that leave the child feeling exhausted and completely out of breath.
Causes of Asthma 

Asthma is mostly triggered by asthma allergens. These allergens are mostly pollens and animal fur.

Exposure to pollution, such as dust and smoke
Heredity
Obesity
History of heartburn, GERD and acid reflux
Inflammation of sinus and airways
History of bronchial disorders and pneumonia
Viral infections
Chronic rhinitis
Low immunity causing constant cold and blockage of nose
Treatments of asthma

A nebulizer that turns asthma medicine into a mist can then be inhaled easily
An inhaler can be used to take in inhaled steroids into the lungs or a bronchodilutor
Try and avoid asthma triggers and allergens as much as possible
Avoid physical stress and heat
Get sufficient rest of about 7-8 hours every day

Troubled Breathing - Can It Be a Sign of Asthma?

How to diagnose asthma in children

Asthma in children under the age of 5 is a matter of concern. It is not a rare disease and early diagnosis is important. Common signs of asthma in children are:

1. Recurring bronchitis
2. Wheezing
3. Discomfort in the chest
4. Coughing
5. Trouble breathing

While some children have persistent yet mild symptoms, some children have severe attacks at times. Seasonal allergies and smoke make the symptoms worse.

What to notice?
While feeding an infant, if you notice that your child is facing shortness of breath, it might be a symptom of asthma. In a toddler, if your notice a decreased desire to run and play, or easy fatigue, then this could be a symptom of asthma. Asthma attacks for many children under the age of 5 are worsened when they catch cold or have any other respiratory infections. All these, if noticed should not be ignored and your child's pediatrician should be consulted.

The above mentioned symptoms were mild. Some children have it worse and the attacks can be life-threatening, needing immediate treatment. If your child is under the age of 5 and you see them doing one of the following, contact emergency services immediately:

1. Trouble in speaking because they have restricted breathing
2. When they are breathing in, the effort is so much that the abdomen is getting sucked in
3. Gasping for air.

Diagnosing asthma in a child can be tricky as symptoms like coughing, wheezing, etc can be for other conditions also. Once a child is a little older and if the symptoms persist, breathing and lung function tests are taken to gauge the situation. 

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How To Diagnose Asthma In Children, Before It Attacks?

There are many food items which would become stale after a few hours, but there are certain foods which may last forever without the need to can them or freeze or dehydrate. If an individual is new to the field of food storage, these staples can be an excellent way to begin.

White rice: There are numerous researchers who have found that polished or white rice keeps up their nutrient content and flavour for almost 30 years if it can be stored in oxygen-free containers in temperatures that range below 40 degrees Fahrenheit. Brown rice, on the other hand, doesn t last more than six months owing to the availability of natural oils in the bran layer.
Honey: Honey is preferably the only food that would last forever due to the perfect chemistry and the handiwork of the bees. The nectar extracted from the flower gets mixed with the enzymes present in the bees  bodies which alter the composition of the nectar. The nectar is further broken down into simple sugars and is accumulated in the honeycombs. The processing, as well as sealing of the honey, is primarily responsible for the incredible shelf life.
Salt: Since sodium chloride is a mineral which is taken from the natural components of the earth, its shelf-life should come as a natural consequence. It is used for centuries as a means of preserving other food products as it can extract out all the moisture. But this doesn t indicate that the table salt would last forever. Experts say that the addition of the iodine to the table salt reduces the shelf life of the salt which means that if the label says that it is an iodized salt, it will not last over five years.
Soy sauce: When left unopened, a container filled with soya sauce would last for a significantly long period. But it is also dependent on the type of soy sauce and the additives used. Even if the soy sauce has been opened, this salty condiment will last for many years if stored in the refrigerator.
Sugar: Quite similar to many items, the storage process of the sugar determines whether the sugar is going to last for long or not. Granulated and powdered sugar must be kept under an airtight condition to steer clear of moisture. Although retailers are needed to provide the manufacturing dates of the sugar, manufacturers say that the sugar remains edible even if it has hardened and become brown.
Pure maple syrup: Pure maple syrup, as well as commercial sugars such as granular sugars and honey, has an irresistible life owing to its shield against any kinds of microbial growth. Unopened maple syrup shall last forever, and in case there is the formation of mould, boiling it to a certain degree and skimming the surface and ultimately pouring it to a clean and air-tight container would eliminate all the problems.
Clarified butter: This kind of butter is boiled unless the total moisture is extracted which is the reason that it doesn t go bad. As long as the clarified butter or ghee is stored in sealed container under cool temperature, it would last for about 100 years.

7 Foods That Never Expire!

Asthma is a chronic lung condition wherein the air passage gets blocked or constricted due to the production of extra mucus. It is an age old condition which has been creating problems for people since a long time. Despite the seriousness of the condition, there are various myths people tend to believe about asthma.

Here are a few myths about asthma and the usage of inhalers:

Regular Usage of Inhalers is Addictive: This is a total myth. Using inhalers is not at all addictive, it is a necessity. Just because you use your inhaler regularly does not mean you are addicted to it.  Just like brushing your teeth every day isn't an addiction, taking your daily medicine from an inhaler isn't an addiction as well. Using an inhaler will just help you with your asthma condition.
Oral Medicine Gets Better Results than Inhalers: Absolutely not. In fact, it is proven that inhalers give better results than oral medications. Oral medication takes longer to act during a sudden asthma attack while inhalers deliver the drug directly to the lungs.
Inhalers Are Meant For Severe Asthma Cases: Well, this again is not true. Inhalers are used for treating asthma. Period. Asthma is a condition where your lungs inflame which is best cured with steroids, and the easiest way to have steroids administered to you is through the inhalation method. When you use the inhalers, the steroids are delivered directly to your lungs. They also have a minimum number of side effects when administered through inhalers.
Asthma is Curable: You might tend to think that asthma can be cured with the help of proper medications. You might think that asthma is not a constant condition. But it is not what you think. The symptoms of asthma might not be present all the time but that doesn't mean you do not have asthma. Asthma is a long-term condition where the airways swell up causing you to suffer from breathlessness. If you suddenly stop taking your daily medicines because the symptoms have not surfaced, then it will take you a long time before you will be able to totally recover from the next attack you suffer from.
If you have asthma, remember to take your medicines daily and timely. 

Debunking Asthma Myths

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