PFT

PFT (Pulmonary fucntion test) refers to one or different types of tests that are conducted on a patient to assess the condition of his lungs and their efficiency in transfering oxygen to the blood. PFT aids in measuring occupational hazards of exposure to contaminants such as asbestos or radon. It helps monitor of disease treatment.

Spirometry is a vital PFT that measures how well the lungs exhale. This diagnostic test is prescribed for patients suffering from asthma or COPD. This tests involves breathing into a mouthpiece that is connected to a spirometer. The amount of air and rate of exhalation are measured over a specific time.

Lung volume measurement test can aid detection of restrictive lung diseases. Such patients are often unable to inhale normal volumes of air due to inflammation or scarring of lung tissue. This PFT can be done as a body plethysmograph.

Gas diffusion test measures the amount of oxygen and other gases that are absorbed into your body from your lungs.

Inhalation challenge test aids in identifying possible allergens that can cause asthma or severe respiratory allergy. Other tests to measure lung function include residual volume, gas diffusion tests, body plethysmography, inhalation challenge tests, and exercise stress tests.

Patients scheduled for PFT must restrain from use of bronchodilators or inhaler medications for few hours prior to the test. Patients are advised not to eat a heavy meal or smoke for a few hours prior to the PFT. Typical normal values for pulmonary function tests are based on the age, height, ethnicity, and sex of the person being tested. Factors such history of smoking, wheezing and obesity can affect results of PFT. Pulmonary function tests are not advised for patients who have recently suffered heart attack.

Chronic Obstructive Pulmonary Disease

Chronic Obstructive Pulmonary Disease (CPOD)encompasses a group of lung disorders that include chronic bronchitis, emphysema, chronic obstructive airways disease and chronic asthma. CPOD affects millions of people worldwide and this disease is mostly attributed to smoking. Air pollution, working in an environment with harmful effluents and passive smoking are also likely causes for Chronic Obstructive Pulmonary Disease. Sometimes a patient may suffer an inherited form of emphysema due to a deficiency of alpha-1-antitrypsin. With chronic bronchitis, the air passages and mucus glands are enlarged thereby leading to severe cough. Over time, the enlargement can lead to reduced oxygen supply to the lungs. Elevated blood pressure is noticed. This condition is more predominant in those who smoke or have a history of respiratory illness. While some patients develop wheezing and shortness of breath, others notice mucus while coughing. Chronic bronchitis is noticed with symptoms such as continuous cough, rapid breathing and cyanosis (bluish tint to the lips and nails). Morning headaches may be noticed on account of inability to remove carbon dioxide from the blood. Patients with severe case of COPD may face hemoptysis (blood while coughing). Emphysema occurs when the tiny alveoli in the lungs are destroyed thereby hampering efficiency of the lungs. It leads to labored breathing and the patient often feels out of breath. Other symptoms are loss of weight, disturbed sleep and tight constriction in the chest.

Diagnostic tests for COPD include blood tests and pulmonary function test. The pulmonary function test is an indicator of the extent of blockage of the lungs. Chest x-rays help in identifying damaged areas of the lungs and areas of fluid collection as well as any masses in the lungs. Sputum culture can identify any respiratory infection. A spirometry test measures the amount of air a person can blow in a second. Arterial blood gas analysis indicates how efficiently the lungs bring oxygen into the blood and remove carbon dioxide.

Antibiotics can help in tackling the bacterial infections in the lungs. Bronchodilators open up the air passages in the lungs thereby alleviating some of the symptoms of Chronic Obstructive Pulmonary Disease. Inhaled corticosteroids will reduce airway inflammation. In severe cases, oxygen is administered. In addition, some lifestyle changes must be followed:

Lung Cancer

Lung cancer has been commonly associated with cigarette smoking and use of tobacco. Lung cancer can surface in any part of the lung, though most instances of lung cancer are noticed in the epithelial lining. Smoking is the cause for nearly 90%of the cases of lung cancer. Tobacco smoke contains carcinogens that contribute towards the development of lung cancer. Women smokers are at greater risk of lung cancer than men smokers. Even passive smoking is fraught with risks. Another cause for lung cancer is exposure to asbestos fibers. This gives rise to mesothelioma. A small percentage of lung cancer cases are attributed to radon gas exposure. Persons suffering from COPD (chronic obstructive pulmonary disease) at at increased risk for lung cancer. Air pollution arising from vehicular and industrial effluents can increase the risk of lung cancer.

Symptoms of lung cancer include coughing and wheezing and chest pain. A patient suffering from lung cancer may notice blood while coughing. There might be extreme fatigue and unexplained weight loss. Lung cancer patients are more likely to face repeated respiratory infections such as bronchitis and pneumonia. Other symptoms of lung cancer include difficulty in swallowing and enlargement of lymph nodes on the neck.

The physician will look into the lungs with a bronchoscope. Tissue samples are often taken for biopsy. Sputum cytology is also conducted to detect presence of lung cancer cells. Chest x-ray and examination is done. Tisue biopsy of lymph nodes is done to diagnose lung cancer. Chemotherapy and radiotherapy are used in the treatment of lung cancer.