This presents a mixture of answers as there is no ONE thing which causes DVT.
Taking into account the various opinions within the USA, Europe and the UK, the following seems to be a shared general response.
Blood flows through the veins of the body at a regular rate, pumped, filtered and spread to all the parts of the body to keep it functioning and healthy.
Blood is kept fluid and flowing by a complex system which carries nutrients and oxygen to cells of the body whilst also transporting metabolic waste products from the cells. It also helps the body to repair itself by being the transportation system for your immune and defence system against disease and injury. A remarkable design of nature.
To enable the flow of blood, the veins have what is often refereed to as valves, preventing the flow of blood from reversing in effect. Muscles via the smallest bodily movement will help squeeze blood vessels which helps with the healthy flow of blood throughout the body without even realising.
•Commonly, DVT in the leg is as a result of either immobility or being static in a seated position, but there are occasions when even an active and healthy person will develop DVT.
•Immobility over a period of hours causes blood flow in the veins to become slower flowing than normally. Slow-
•A surgical procedure where the person is asleep and static between 60 -
Your legs are totally still when you are under anaesthetic, and because even the muscles in your body have been paralysed, albeit temporarily, the blood flow in your veins can become very slow and make the chance of a clot more likely.
Certain types of surgery (particularly operations on the pelvis or legs) increase the risk of DVT even more.
It has become common for patients seen at risk of developing a DVT, to be issued compression stockings, before, during and after surgery.
Any illness or injury that causes a person to become immobile, will increases the risk of developing DVT.
This includes having a leg in a hard plaster cast after a fracture.
People who are admitted to intensive care units are at an increased risk of DVT as are anyone that finds themselves bed-
In recent years the connection between air travel and DVT has been highlighted and brought into the media on numerous occasions as a point of education and indeed prevention. However, despite this, it is still expected that between 3% and 6% of air travellers will develop DVT.
As a direct result of all the publicity with air travel and DVT, a plethora of gadgets, appliances and behavioural methods, has hit the markets all aimed at preventing DVT.