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From: werner
Date: 02/21/02
Time: 12:22:46 AM
I spent some hours searching the web for endoscopic pictures of the LES.
I found a summary of endoscopic sites in French at: http://www.sfed.org/ressourcespro/imagerie.htm
Best found picture was http://www.gastrolab.net/bcar-06.jpg I liked these images from Finnish Gastrolab best. I didn't try the sites, where a password or registration was needed.
Other good pictures (pediatrics) at: http://www.vh.org/Providers/TeachingFiles/Endoscopic/Esophagus/nlles.html
Also : http://www.mindspring.com/~atlsouthgastro/
Now , all these LESs were below the z-line = ora serrata = squamo-columnar-line.
I've read at: www.inxpress.net/~oastiennon/webdoc25.htm
that the LES is 0.2-3 cm above the z-line and is 8-11mm in length.
I.e. the pictures at http://www.vh.org/Providers/TeachingFiles/Endoscopic/Esophagus/ seem to suggest that the sphincter is exactly at the entry of the stomach , where the diameter of the esophagus suddenly becomes much larger. This can be seen best in the upward looking pictures , viewed from stomach.
Now I'm wondering : are there 2 LESs ? Do some people have both functioning ? and some people only one of them ("upper" LES , "lower" LES , distance between them = 2-5 cm (?) ) ? and some people regretfully none ?
The sudden transient closing at lower-LES area , which I had observed on my endo-video was probably a "peristaltic wave in the antrum of the stomach" which was demonstrated on one of the picture-sites (don't remember which)
