Stewart G D, Lakshmi M V, Jackson A
Department of Radiology, Manchester Royal Infirmary, UK.
J Accid Emerg Med. 1994 Sep;11(3):201-3. doi: 10.1136/emj.11.3.201.
The aluminium ring pulls associated with the latest designs of drinks cans can be relatively easily detached from their mounting on the top of the can and subsequently aspirated. Their small size predisposes them to lodge as foreign bodies (FBs) in the throat. The similarity of atomic number between soft tissue (7.5) and aluminium (13) makes detection of these FBs difficult on soft tissue radiography. If aspiration is suspected direct visualization and removal may be indicated even if radiography is negative.
与最新款饮料罐相关的铝环拉片相对容易从其在罐顶的固定处分离，随后被吸入。它们体积小，容易作为异物卡在喉咙里。软组织（原子序数为7.5）和铝（原子序数为13）的原子序数相似，这使得在软组织X线摄影中很难检测到这些异物。如果怀疑有吸入情况，即使X线摄影结果为阴性，也可能需要直接观察并取出异物。
