From Greek pylorus; pyl- = gate, -orus = guard. The inferior part of the stomach.
The pylorus is the region of the stomach that connects to the duodenum. It is divided in two parts: the pyloric antrum, which connects to the body of the stomach, and the pyloric canal, which connects to the duodenum. The pyloric sphincter, or valve, is a strong ring of smooth muscle at the end of the pyloric canal and lets food pass from the stomach to the duodenum. In anatomy, the stomach (in ancient Greek στόμαχος) is an organ in the alimentary canal used to digest food. ... In anatomy of the digestive system, the duodenum is a hollow jointed tube that connects the stomach to the jejunum. ... From late Latin sphincter, from Greek sphinkter, band, contractile muscle, from sphingein, to bind tight. ... A valve is a mechanical device that regulates the flow of fluids (either gases, fluidised solids, slurries or liquids) by opening, closing, or partially obstructing various passageways. ...
One medical condition associated with the pylorus is pyloric stenosis. Pyloric stenosis is an uncommon pediatric condition where there is a congenital narrowing of the pylorus (the opening at the lower end of the stomach). ...
In such conditions as stomach cancer, when tumours may partly block the pyloric canal, a special tube can be implanted surgically to connect the stomach to the duodenum to assist food to pass from one to the other. This tube is called a "pyloric stent".
Your pyloricvalve continues to regulate the emptying of the stomach contents into the duodenum and all of the hormones and secretions that occur in the duodenum continue after surgery.
Since our pyloricvalve and duodenum are left functioning as before, we DS patients don't have dumping syndrome, nor a risk of staple line problems, clogging of the anastamosis, ulcers at the stoma, etc. (remember, we don't have pouches or stomas).
The pyloricvalve is a sphincter muscle that opens and closes to regulate the release of stomach contents into the digestive tract.
The pyloric orifice communicates with the duodenum, and its position is usually indicated on the surface of the stomach by a circular groove, the duodenopyloric constriction.
In the pyloric portion are seen: (a) the elevation corresponding to the incisura angularis, and (b) the circular projection from the duodenopyloric constriction which forms the pyloricvalve; the separation of the pyloric antrum from the rest of the pyloric part is scarcely indicated.
The pyloricvalve (valvula pylori) is formed by a reduplication of the mucous membrane of the stomach, covering a muscular ring composed of a thickened portion of the circular layer of the muscular coat.
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