Which type of stent is frequently used for colorectal obstruction?

Metallic stents are commonly used for colorectal obstruction because of their strength and durability, which are crucial for maintaining lumen patency in the gastrointestinal tract. These stents are typically made from either stainless steel or nitinol and can help alleviate obstructions caused by tumors or strictures in the colon. They provide a permanent solution to support the intestinal wall, allowing for a quicker recovery and reduced risk of re-obstruction.

In contrast, plastic stents, while used in certain applications, are not as robust for long-term colorectal use due to their lower strength and potential for collapsing under pressure. Biliary stents, designed for the biliary tree, and ureteral stents, which are meant for the urinary system, are not appropriate for treating colorectal obstructions, as their design and function cater to different anatomical requirements and clinical scenarios. Thus, the metallic stent stands out as the most suitable and frequently used choice in these cases.