Expandable sheath for percutaneous upper gastrointestinal tract access
First Claim
1. An expandable endogastric access sheath for providing minimally invasive access to the upper digestive tract, the sheath comprising:
- an axially elongate sheath with a proximal end, a distal end, and a central lumen that extends therethrough, a distal region of the sheath being located generally at the distal end of the sheath and being configured to be is expandable in circumference in response to outward pressure applied therein, a hub coupled to the proximal end of the sheath tube;
an obturator positioned in the central lumen, the obturator configured to occlude the central lumen of the sheath during insertion, the obturator including a hub, a guidewire lumen extending through the obturator, and an expandable portion configured to expand the distal region of the sheath from a collapsed configuration to an expanded configuration;
a radially expandable distal anchor positioned on the sheath; and
a radially expandable proximal anchor positioned on the sheath proximal to the distal anchor.
1 Assignment
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Accused Products
Abstract
Disclosed is an expandable percutaneous sheath, for introduction into the body while in a first, low cross-sectional area configuration, and subsequent expansion of at least a part of the distal end of the sheath to a second, enlarged cross-sectional configuration. The sheath is configured for use in the upper gastrointestinal tract and has utility in the performance of procedures in the esophagus and stomach. The access route is through the anterior abdominal wall to the stomach. The distal end of the sheath is maintained in the first, low cross-sectional configuration during advancement through the abdominal wall and into the stomach. The distal end of the sheath is subsequently expanded using a radial dilatation device. In an exemplary application, the sheath is utilized to provide access for a diagnostic or therapeutic procedure such as diagnosis and repair of gastro esophageal reflux disease. The sheath further can be secured within the gastrointestinal system and be used to draw the stomach wall against the abdominal wall.
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Citations
20 Claims
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1. An expandable endogastric access sheath for providing minimally invasive access to the upper digestive tract, the sheath comprising:
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an axially elongate sheath with a proximal end, a distal end, and a central lumen that extends therethrough, a distal region of the sheath being located generally at the distal end of the sheath and being configured to be is expandable in circumference in response to outward pressure applied therein, a hub coupled to the proximal end of the sheath tube;
an obturator positioned in the central lumen, the obturator configured to occlude the central lumen of the sheath during insertion, the obturator including a hub, a guidewire lumen extending through the obturator, and an expandable portion configured to expand the distal region of the sheath from a collapsed configuration to an expanded configuration;
a radially expandable distal anchor positioned on the sheath; and
a radially expandable proximal anchor positioned on the sheath proximal to the distal anchor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of proving access to a stomach of a patient, the method comprising the steps of:
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inserting a guidewire through the abdominal wall into the stomach;
inserting a sheath with at least a distal region in a collapsed configuration and with a pre-inserted dilator positioned within a lumen in the sheath into the patient over the guidewire;
advancing the sheath to a treatment or diagnostic site within the stomach or upper digestive tract;
expanding the distal region of the sheath with the dilator;
collapsing the dilator;
removing the dilator from the sheath, inserting a instrument through the lumen of the sheath into the stomach;
performing therapy or diagnosis with the instrument; and
removing the sheath from the patient. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification