My name is Wahid Zia. I am collecting stamps since the last 36 years (1980). I created a blog which includes the information of Pakistan all stamps. W/W new issues & all issues of Pakistan from 1947 to date are available on this blog. I invite you to visit my blog and get useful information.

Monday, August 30, 2010

Medical Breakthroughs

The United Kingdom has been at the forefront of medical research and technology since William Harvey first described the circulation of the blood in 1628. British physicians and scientists can justly take credit for the discovery and application of smallpox vaccination, anesthetics, anti-septic surgery and many public health measures, but perhaps some of the most important breakthroughs have taken place in the last 120 years.1st Class – Heart-regulating beta-blockers synthesized by Sir James Black 1962Beta blockers are used for various indications, but particularly for the management of cardiac arrhythmias, cardioprotection after myocardial infarction (heart attack), and hypertension. Propranolol was the first clinically useful beta adrenergic receptor antagonist. Invented by Sir James W. Black in the late 1950s, it revolutionized the medical management of angina pectoris and is considered to be one of the most important contributions to clinical medicine and pharmacology of the 20th century.
58p – Antibiotic properties of penicillin discovered by Sir Alexander Fleming 1928The discovery of penicillin is attributed to Scottish scientist and Nobel laureate Alexander Fleming in 1928 He showed that, if penicillium notatum was grown in the appropriate substrate, it would exude a substance with antibiotic properties, which he dubbed penicillin. This serendipitous observation began the modern era of antibiotic discovery
60p – Total hip replacement operation pioneered by Sir John Charnley 1962Sir John Charnley began his research into hip replacement in 1949 when he moved his clinical practice as an orthopedic surgeon to Wrightington Hospital near Wigan. While suffering many setbacks during its development Charnley finally performed the first successful hip replacement operation in 1962. This subsequently became the gold standard treatment for this condition and has remained the most successful surgical and radiological procedure up to the present day.
67p – Artificial lens implant surgery pioneered by Sir Harold Ridley 1949Whilst working with Royal Air Force casualties during World War II, Ridley noticed that when splinters of perspex from aircraft cockpit canopies became lodged in the eyes of wounded pilots, they did not trigger rejection, leading him to propose the use of artificial lenses in the eye to correct cases of cataracts. He had a lens manufactured using an identical plastic – Perspex CQ made by ICI – and on 29 November 1949 at St Thomas’ Hospital, Harold Ridley achieved the first implant of an intraocular lens.
88p – Malaria parasite transmitted by mosquitoes proved by Sir Ronald Ross 1897In 1897, Ronald Ross discovered the presence of the malarial parasite within a specific species of mosquito, the Anopheles. He initially called them dapple-wings and following the hypothesis of Sir Patrick Manson that the agent that causes malaria was spread by the mosquito, he was able to find the malaria parasite in a mosquito that he artificially fed on a malaria patient. Later using birds that were sick with malaria, he was able to ascertain the entire life cycle of the malarial parasite, including its presence in the mosquito’s salivary glands. He demonstrated that malaria is transmitted from infected birds to healthy ones by the bite of a mosquito, a finding that suggested the disease’s mode of transmission to humans.
97p – Computed tomography scanner invented by Sir Godfrey Hounsfield 1971While on an outing in the country, Hounsfield came up with the idea that one could determine what was inside a box by taking X-ray readings at all angles around the object. Hounsfield built a prototype head scanner and tested it first on a preserved human brain, then on a fresh cow brain from a butcher shop, and later on himself. In September 1971, CT scanning was introduced into medical practice with a successful scan on a cerebral cyst patient at Atkinson Morley Hospital in Wimbledon, London.
Title: Medical Breakthroughs
Date of Issue: 1 September 2010
Country: Great Britain
Denominations: 1st, 58p, 60p, 67p ,88p ,97p