DOI: 10.36347/sjams.2017.v05i01.025

Pages: 116-120

Cigarettes kill an estimated 5 million people annually worldwide. The World Health Organization reported that tobacco smoking killed 100 million people worldwide in the 20th century and warned that it could kill one billion people around the world in the 21st century. Cigarette smoking is the leading preventable cause of mortality .By the early 2030, tobacco related death would increase to about 10 million a year. After inhalation of cigarette smoke, nicotine is quickly distributed to the brain, and it can affect the central nervous system instantaneously. Tobacco smoke contains 4000 chemicals, out of which 60 are known carcinogens, which can lead to lung cancer. Spirometry is the most common and widely used for the quantitative analysis of ventilatory dysfunction and is the classic pulmonary function test that measures the volume of air inspired and expired as a function of time. It is the simplest of all respiratory function tests.