名詞 catheter:

1. a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open

cath.e.ter

n.（名詞）
A hollow, flexible tube for insertion into a body cavity, duct, or vessel to allow the passage of fluids or distend a passageway. Its uses include the drainage of urine from the bladder through the urethra or insertion through a blood vessel into the heart for diagnostic purposes.
導(dǎo)管：可彎曲的中空管子，用以插入體腔管道或血管以導(dǎo)入液體或擴(kuò)張通道。其作用包括通過尿道從膀胱引流液體或通過血管插入心臟以達(dá)到檢查的目的

來源：
Late Latin
后期拉丁語
from Greek kathetôr
源自 希臘語 kathetôr
from kathienai [to send down]
源自 kathienai [放下]
kat-, kata- [cata-]
kat-, kata- [前綴，表.向下，相反.]
hiônai hô- [to send] * see yô-
hiônai hô- [送] *參見 yô-