When a blood vessel or your broncheal tube is blocked, you open it and put in stent to keep it open. Usually a stent is a sping or basket weave, and they are left in place. But what about if they are in places where they could cause scar tissue and should be rmoved?
Mattsson evaluated and tried several different methods, but he found the ultimate solution in a pair of old socks. Mattsson's stent is knitted, and like a sock can be unraveled after it has been used. This allows the stent to be removed when it is not needed anymore.