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A cannula, gastrointestinal technology, applied in the field of implant systems, can solve problems such as implant migration, bacterial infection or system infection, tissue necrosis, etc.
Inactive Publication Date: 2014-03-12
METAMODIX
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Moreover, stents with active fixation facilities such as barbs that penetrate deeply into the surrounding tissue may cause tissue necrosis and corrosion of the implant passing through this tissue, which may lead to complications such as bacterial infection of mucosal tissue or systemic infection
Also, implants such as stents have a tendency to migrate due to the intermittent peristaltic action in the digestive tract
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[0138] figure 1 is a cross-sectional view of an embodiment of the invention implanted in a portion of the human digestive tract. When a person ingests food, the food enters the oral cavity 100 , is chewed, then travels along the esophagus 101 to the lower esophageal sphincter of the gastroesophageal junction 102 and into the stomach 103 . Food is mixed with enzymes in the mouth 100 and in the stomach 103 . Stomach 103 converts food into a semi-fluid substance called chyme. Chyme enters the pyloric antrum 104 and exits the stomach 103 through the pylorus 106 and pyloric foramen 105 . The pylorus (or pyloric sphincter) is a muscle group that regulates the diameter of the pyloric hole, thereby affecting the rate of chyme exiting the stomach. The pylorus (or pyloric sphincter) also has a width (or thickness), which is the distance the pylorus extends between the stomach and duodenum. In adults, the small intestine is about 21 feet long. The small intestine consists of three ...
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Abstract
A gastrointestinal device for implanting within a pylorus, a duodenal bulb, and a duodenum of a patient's gastrointestinal tract includes an expandable structure includes a proximal portion having a plurality of spring arms and a distal portion having a plurality of spring arms, the proximal and distal portions coupled by a rigid central cylinder having a diameter capable of fitting within the pylorus and having a length greater than a width of the pylorus. A membrane is coupled to and covering at least a portion of one of the proximal portion and the distal portion of the expandable structure. An intestinal bypass sleeve is coupled to at least one of the proximal and distal portions of the expandable structure and having a length sufficient to extend at least partially into the duodenum. In the expanded configuration, the proximal portion has a diameter larger than a maximum opening diameter of the pylorus and further wherein, in the expanded configuration, the distal portion has a diameter larger than a maximum opening diameter of the pylorus.
Description
[0001] Cross References to Related Applications [0002] This application claims the benefit under 35 U.S.C Section 119(e) of U.S. Provisional Patent Application 61 / 462,156, filed January 28, 2011, and U.S. Provisional Patent Application 61 / 519,207, filed May 24, 2011, both of which The entire contents are incorporated herein by reference. This application is a continuation-in-part of each of the following applications, each of which is incorporated herein by reference in its entirety: (1) U.S. Patent Application 12 / 752,697, filed April 1, 2010, which claims 2009 (2) U.S. Patent Application 12 / 833,605, filed July 9, 2010, which claims U.S. Provisional Patent Application 61, filed July 10, 2009 / 270,588; (3) U.S. Patent Application 12 / 986,268, filed January 7, 2011, which claims benefit of U.S. Provisional Patent Application 61 / 335,472, filed January 7, 2010; (4) November 2011 US Patent Application 13 / 298,867, filed on the 17th, which claims the benefit of US Provisional Paten...
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