In laboratory medicine, a test result's accuracy depends not only on the analyser and analytical process but also on the quality of the specimen submitted for testing. Anticoagulant contamination of a serum (or other) sample is an important but often overlooked pre-analytical error that can produce misleading laboratory results, even when the analyser is functioning perfectly and internal quality control is within acceptable limits. Serum samples are generally collected in plain or serum-separator tubes and are allowed to clot before centrifugation. Contamination may occur when additives from other blood collection tubes inadvertently enter the serum specimen. This can happen because of an incorrect order of draw , inappropriate blood transfer between tubes, collection from an intravenous line, improper phlebotomy technique, or accidental use of the wrong tube . Anticoagulants are not simply inert substances. They contain chemicals specifically designed to alter coagulation or pre...
H1N1 influenza (commonly known as S wine Flu ) is a type of Influenza A infection that can cause anything from a mild respiratory illness to serious complications. The H1N1 virus that caused the 2009 pandemic has since become part of the viruses responsible for seasonal influenza. With influenza circulating in the community, awareness is important, not only to protect ourselves but also to prevent transmission to children, elderly people, pregnant women and those with underlying illnesses. What are the symptoms? H1N1 can begin suddenly. Common symptoms include fever, dry cough, sore throat, runny or blocked nose, headache, body aches, fatigue and chills . Some people may develop vomiting or diarrhoea, particularly children. Symptoms generally begin about 1-4 days after infection and most otherwise healthy people recover within about a week, although cough and tiredness may persist longer. Role of Laboratory Investigations: Importantly, symptoms alone cannot always distinguish influen...