In medical terms, a stent is a plastic or a metal tube that is used for penetrating into the patient’s lumen of an anatomic vessel or duct to keep the passageway open. A stent is a small tube that is expandable, and is used in the treatment of narrowed arteries. It is also placed in weak arteries to improve the blood flow and to prevent the arteries from bursting. Stenting is what the placement of a stent is called, and there are various different ways for the stents insertion. A variety of stents is used for different purposes, right from expandable biliary (procedure to open the obstructed bile duct), coronary, and vascular stents, to simple plastic stents that allow the flow of urine between the kidney and bladder. On the other hand, a gel stent is a type of hydrophilic tube, which consists of porcine gelatin that is cross-linked with glutaraldehyde. This type of stent is a rigid tube which softens upon hydration.
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