ostium

基本解释

This technique enables a "single shot" PVI by placing the balloon at the PV ostium and ablating circumferentially around the PV ostia with a single energy application, the researchers explain.
研究人员解释说这项技术能通过置于肺静脉口的球囊单次射出“一枪”的能量环形消融肺静脉口。
In cases where the posterior fontanel is identified, the division between the natural ostium and the fontanel should be resected to allow free communication between the two.
如果确定有前卤存在，应该将前卤和上颌窦口之间的间隔切除，使两者相通。
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Programmed stimulation was delivered at coronary sinus ostium, distal coronary sinus and lateral wall of left atrium.
分别通过冠状窦口电极、冠状窦远端电极和左房侧壁电极进行程控刺激。

Each is lined with tissue called the mucosa, which secretes mucus continuously along hairy cells called cilia and out a tiny passageway called an ostium, through which the mucus drains into the nasal cavity and down the back of the throat, where it is swallowed (unless you blow your nose).
FORBES: Balloon Therapy
They ended up producing a flexible catheter tube that goes a bit of the way up the nostrils, then a guide wire is inserted into the targeted sinus. (In live patients this is done via an endoscope and fluoroscope.) A balloon catheter is advanced over the guide wire and positioned against the blocked ostium.
FORBES: Balloon Therapy