Sentence:  As all of the arteries are controlled by <WSD>snuggers</WSD> except the innominate artery, the cardioplegia can infuse only the ascending aorta and thereby the coronary arteries. Once this cardioplegia is administered, the <WSD>snuggers</WSD> on the innominate artery can be appropriately rearranged and the stopcock can be moved back for institution of regional perfusion. 
Meaning of the word marked with <WSD> tags:  (medicine) A threaded plastic tube used to clamp blood vessels during surgery.