Kakizaki Hirohiko, Takahashi Yasuhiro, Miyazaki Hidetaka, Nakamura Yasuhisa, Ikeda Hiroshi, Asamoto Ken, Nakano Takashi
Department of Ophthalmology, Aichi Medical University, Nagakute , Aichi , Japan .
Orbit. 2013 Oct;32(5):294-7. doi: 10.3109/01676830.2013.815227.
The aim of this study was to examine the length and diameter of the intra-sac portion of the lacrimal canaliculus and to propose a modified functional valve model at the common internal ostium.
We examined 14 eyelid and orbital specimens from 10 cadavers (seven right, seven left; aged 45-85 years at death), fixed in 10% buffered formalin. Sliced specimens were dehydrated and embedded in paraffin, cut into 7 μm thickness sections, and stained with Masson's trichrome. We then measured the length and diameter of the intra-sac portion of the lacrimal canaliculus.
The average length of the intra-sac portion of the lacrimal canaliculus was 1344.9 μm (range, 920.2-1821.5 μm), and its average diameter was 287.5 μm (range, 199.1-523.3 μm).
The intra-sac portion of the lacrimal canaliculus had an average length and diameter of 1344.9 μm and 287.5 μm, respectively. The lacrimal sac mucosa changes its thickness with autonomic stimulation, and the length and diameter of the intra-sac portion of the lacrimal canaliculus is likely changed concurrently. The long length and small diameter of the intra-sac lacrimal canaliculus presumably contribute to it acting as an autonomic functional valve at the common internal ostium.
本研究旨在检测泪小管囊内段的长度和直径，并提出一种改良的泪囊总鼻泪管开口处功能性瓣膜模型。
我们检查了10具尸体（7例右侧，7例左侧；死亡时年龄45 - 85岁）的14个眼睑和眼眶标本，标本用10%中性福尔马林固定。切片标本经脱水后石蜡包埋，切成7μm厚的切片，并用马松三色染色法染色。然后我们测量了泪小管囊内段的长度和直径。
泪小管囊内段的平均长度为1344.9μm（范围920.2 - 1821.5μm），平均直径为287.5μm（范围199.1 - 523.3μm）。
泪小管囊内段的平均长度和直径分别为1344.9μm和287.5μm。泪囊黏膜随自主神经刺激而改变其厚度，泪小管囊内段的长度和直径可能也会随之改变。泪小管囊内段较长的长度和较小的直径可能有助于其在泪囊总鼻泪管开口处起到自主神经功能性瓣膜的作用。
