原级：catheter
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1. 医用导管：100012 医用热气颤振器 Hot air vibrators for medical purposes | 100015 医用导管 Catheters | 100016 护理器械 Nursing appliances
2. 导管：123 case-control 病例-对照 | 124 catheters 导管 | 126 celiac disease 乳糜泻
1. The use of warfarin with the catheters to prevent clotting is controversial because there's no clear evidence that it's effective.
2. Robinson said many bears were still had catheters surgically implanted into their gall bladders although regulators had banned that painful method of bile extraction.