The catheter, a tube with a camera and a LASER on the end, could he threaded into the gall bladder and pancreas.

这根导管，是前端装有照像机和激光的管子，可被导入胆囊和胰腺。

youdao

In bladder instillation, the prescription medication dimethyl sulfoxide, or DMSO, (Rimso-50) is placed into your bladder through a thin, flexible tube (catheter) inserted through the urethra.

CNN: Interstitial cystitis

He'd spent eight years developing a special kind of Foley catheter--a flexible tube inserted into the bladder of hospital patients and disabled people to drain urine--that staved off inevitable infections.

FORBES: Magazine Article