Lub catheter yog ua los ntawm tshwj xeeb nylon nrog zoo elasticity, siab tensile lub zog, tsis yooj yim rau tawg. Nws yog nrog cov cim meej meej thiab X-ray obstructing kab, uas zoo txhim kho qhov chaw. Nws tuaj yeem muab tso rau hauv tib neeg lub cev tau ntev, thiab siv tshuaj loog ua ntej thiab tom qab ua haujlwm.