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?

What is Allergic Asthma?

Allergic asthma is the condition in which the symptoms of an asthmatic attack appear after exposure to certain allergens. 90% of the cases of asthma in children are allergy driven, while in adults, the percentage is said to be around 50%.

An allergy happens when an individual's immune system exhibits massive reaction or fights vigorously against substances like pollen, dust, animal dander or certain other minute particles which are actually not harmful to the body but are considered so by the immune system.

Symptomatic changes in cases of allergic asthma:

If the symptoms of an asthma attack occur only when you are subjected to these triggers or irritant particles, your case is allergy driven.

In such cases, the airway reacts aggressively to the entry of such allergens.

The airway muscles tighten up and inflammation is observed.

Breathing becomes painful and compromised, and mucus accumulation sets in very quickly.

Coughing is a common phenomenon, as the body tries to expel the mucus accumulated.

The allergens mentioned above are not the only triggering agents. Basically, anything that causes irritation could trigger an allergy and an asthmatic attack thereafter. Symptoms in the case of allergy driven asthma are more or less the same as seen in other asthmatic cases.

Confirming the cause of asthma as allergic or not:

The doctor would give you a much better clarification on whether you're asthma is allergy driven or not. There are pretty much two ways to decipher the same:

One is to administer a tiny amount of allergen to the skin and making a note of the reaction to that. Whether the reaction is a normal one or an aggressive one would tell if an individual has an allergy or not.

Specific IgE test may be done to confirm the cause, or to test the presence of an allergic reaction in the individual.

All your queries pertaining to allergic asthma and asthma, in general, are more than welcome.

What is Allergic Asthma?

Has your child been coughing frequently? Is the cough chronic in nature, making your child breathe rapidly and does he/she complain about a tightened chest? These symptoms signify that your child is having asthma. Asthma is a medical condition characterized by paroxysmal wheezing respiration dyspnoea. It is common in children and an affected child experiences difficulty in breathing, and a whizzing sound is produced, especially during expiration. Asthma may lead to severe health complications and needs immediate diagnosis and treatment.

Diagnosis: The diagnosis of asthma is based on the symptoms, medical history and a physical examination of the child.

The different modes of asthma diagnosis are as follows:

    Medical history and symptoms: You must tell the doctor about any history of breathing trouble with your child or whether there are chances of other inherited health conditions. You must explain your child's symptoms properly, which may include coughing, wheezing, chest pain or tightness and others if observed.
    Physical examination: A physical exam will be carried out in your child where the doctor will listen to his heart and lungs, and look for eye or nose allergies.
    Medical tests: A chest X-ray of the child has to be carried out, along with a simple lung function test known as spirometry. This test measures the amount of air present in the lungs and determines how fast it can be exhaled. Spirometry enables a doctor to determine the severity of the asthma. Some other tests are also carried out for the identification of asthma triggers. They include allergy skin testing, blood tests and X-rays to know if sinus infections are affecting the asthma. An asthma test determines the amount of nitric oxide in your child's breath.

Treatment: Based on your child's severity of asthma symptoms and his medical history, the doctor will provide you with an action plan to treat the same. This action plan explains all the medications your child requires, the dosage and schedule of the medicines. The plan also includes points on what to do when the asthma worsens and when an emergency treatment is required. Anti-inflammatory drugs are prescribed to children who require bronchodilator medication. All asthma medicines used by adults can be used in case of children but in lower dosages.

You should give the asthma medications to your child using a home nebulizer or a breathing machine. A nebulizer delivers asthma drugs by transforming them from liquid to a mist. The child gets the drug by breathing it via a face mask.

In order to control and manage asthma in children, they must avoid the triggers and should keep away from any source of smoke. A doctor must be consulted to know about the best diagnosis and treatment methods.

Asthma in Children: Diagnosis and Treatment

Asthma is a condition that can flare up anytime; be it at your child's soccer practice or during the middle of the night. Whenever the condition sets in, it leads to your child struggling for breath. For a parent to witness this situation can be hard; but you should know the techniques to keep the situation under control.

Here are a few tips on how to manage the situation:

1. Find out the triggers in your home: Asthma is triggered due to substances that your child may be allergic to. Examples are cigarette smoke, fur of pets and dust. If possible, keep your child away from the known triggers so that the condition does not flare up again.

2. Keep records of the following: It is good to have an action plan ready for your child when the bouts of asthma strike. When you visit the doctor to discuss about your child's condition then make sure that you have these records at hand.

The triggers that caused the bout of asthma
How many times did your child have wheezing episodes?
The number of times your child has been admitted for the same reason
The medications that your child is currently taking, dosage and/or whether they have been changed
How often does he/she need medications if he/she has acute symptoms?
3. Knowledge of the test your child may require: Asthma control test is a type of test that allows parents and children to grade asthma symptoms without a doctor. A pulmonary function test is used to detect the capacity of the lungs and flow of air.

4. See how your child responds to the treatments: You should consider changing the treatments for your child if he/she has recurrent symptoms of asthma attack and require frequent visits to the Emergency Room even after taking medications for an extended duration.

5. Long term treatment plans require patience: Any asthma treatment plan requires patience as they might not immediately cure symptoms.

How to Manage if Your Child Is Suffering From Asthma

Bronchial asthma is a medical condition. It happens when the airways of your lungs swell up and become narrow. This limits the amount of air that can pass through the passages and this leads to respiratory distress. Asthma can affect anyone and usually, it starts from childhood.

What are the Symptoms of Bronchial Asthma?
Some common symptoms of bronchial asthma are-

  Wheezing and breathlessness
  Tightness of the chest
  Frequent bouts of coughing which are more common at night or in the early morning, making sleep difficult. 

Bronchial asthma does not go away on its own. It requires treatment.

What is Siddha?
Siddha is a very ancient system of medication and treatment that originated in Tamil Nadu. According to Siddha, the individual is a microcosm of the entire universe. And it is made up of some fundamental elements- earth, air, fire, water and ether as well as three humours- Vata, Pitta and Kapha. An imbalance of these components causes an ailment. So, the chief goal of Siddha is to restore the right balance to root out any illness.

Types of Asthma according to Siddha -
We find mention of asthma in Siddha literature. It is called Eraippu Noi. There are five types of asthma -

  Vazhi Eraippu Noi - Digestive troubles may lead to accumulation of Vata. This is not a grave form of asthma and can easily be cured.

  Iya Eraippu Noi - Exposure to cold climes or freezing winds or being drenched in rain can cause Kapha to build up in the system, which triggers this form of asthma. It is accompanied by symptoms such as the runny nose, nasal congestion, breathing trouble when lying down.

  Iyavazhi Eraippu Noi - Both Vata and Kapha accumulate to trigger this kind of asthma. Its symptoms include breathlessness, bloating, indigestion, disorientation, etc.

  Mukkuttra Eraippu Noi - An imbalance of all three humours- Vata, Pitta and Kapha are the culprits behind mukkuttra Eraippu Noi. A person who has contracted it might experience severe chest pain, constipation and even loss of consciousness.

  Mel nokku Eraippu Noi - This is the gravest form of bronchial asthma and requires extensive treatment.

Treatment of Asthma according to Siddha -

Siddha will first try to understand what kind of imbalance has caused your asthma. The medication depends on the type of asthma. Siddha medicines are made from particular parts of herbs that will induce you to either vomit or defecate to get rid of the excess humour that has accumulated in your body. Thus, the balance of Kapha, Pitta and Vata is restored.

You might also be suggested a few breathing exercises to strengthen your lungs and diaphragm.
Siddha follows a holistic way to curing bronchial asthma and targets it at its source. Unlike allopathic medication, medicines prescribed by Siddha are herbal and have no side effects.

Siddha Approach In Treating Bronchial 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?

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