High specific gravity intragastric device
First Claim
1. An untethered, high specific gravity, antrum-based, intragastric device, comprising:
- a single expandable casing having a biocompatible outer surface and, upon expansion, a predetermined shape for contacting the antrum of the stomach of a subject;
wherein,the expanded casing hasa minimum, cross-sectional dimension of at least about 40 mm during operation of the device in the subject to avoid passage of any portion of the device through the lower esophageal sphincter or pyloric sphincter of the subject after expansion, limiting the intragastric device to a minimum volume of π
(40 mm)3/6 or about 33 ml;
a maximum, cross-sectional dimension of the predetermined shape of about 70 mm for a positioning of the predetermined shape in the pyloric antrum of the subject, limiting the intragastric device to a maximum volume of π
(70 mm)3/6 or about 180 ml;
and,a high specific gravity material, wherein the high specific gravity material has a specific gravity that is greater than 1.2 and contributes to an in vivo specific gravity of the device that ranges from about 1.2 to about 2.1, wherein the specific gravity functions to direct the device to the pyloric antrum of the subject to induce gastric discomfort during use of the device;
wherein, the specific gravity of the device allows the device to move freely about the distal stomach and apply pressure to the antrum without otherwise affecting normal gastric function of the subject.
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Accused Products
Abstract
The teachings are directed to an intragastric device comprising a flexible and expandable bladder having a predetermined shape upon expansion for contacting the antrum of the stomach of a subject. The device is designed to avoid passage of any part of the device beyond the pylorus and lower esophageal sphincter while the bladder is expanded during use. In these embodiments, the bladder can contain a high specific gravity material when expanded; wherein, the high specific gravity material contributes to an in vivo specific gravity of the device that ranges from about 1.2 g/ml to about 2.1 g/ml and functions to direct the device to the pyloric antrum of the subject during use of the device. Moreover, these embodiments can include a filling material comprising a biocompatible fluid component and a hydrogel component to make the device substantially leakproof and contribute to the in vivo specific gravity of the device.
125 Citations
71 Claims
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1. An untethered, high specific gravity, antrum-based, intragastric device, comprising:
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a single expandable casing having a biocompatible outer surface and, upon expansion, a predetermined shape for contacting the antrum of the stomach of a subject;
wherein,the expanded casing has a minimum, cross-sectional dimension of at least about 40 mm during operation of the device in the subject to avoid passage of any portion of the device through the lower esophageal sphincter or pyloric sphincter of the subject after expansion, limiting the intragastric device to a minimum volume of π
(40 mm)3/6 or about 33 ml;a maximum, cross-sectional dimension of the predetermined shape of about 70 mm for a positioning of the predetermined shape in the pyloric antrum of the subject, limiting the intragastric device to a maximum volume of π
(70 mm)3/6 or about 180 ml;and, a high specific gravity material, wherein the high specific gravity material has a specific gravity that is greater than 1.2 and contributes to an in vivo specific gravity of the device that ranges from about 1.2 to about 2.1, wherein the specific gravity functions to direct the device to the pyloric antrum of the subject to induce gastric discomfort during use of the device; wherein, the specific gravity of the device allows the device to move freely about the distal stomach and apply pressure to the antrum without otherwise affecting normal gastric function of the subject. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. An intragastric device, comprising:
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a single flexible and expandable bladder having a biocompatible outer surface and, upon expansion, a predetermined shape for contacting the antrum of the stomach of a subject; and
,a means for expanding the bladder in vivo;
wherein,the flexible bladder has a diameter upon expansion that ranges from about 40 mm to about 70 mm, limiting the intragastric device to a minimum volume of π
(40 mm)3/6 or about 33 ml and a maximum volume of π
(70 mm)3/6 or about 180 ml; and
,a high specific gravity material, wherein the high specific gravity material has a specific gravity that is greater than 1.2 and contributes to an in vivo specific gravity of the device that ranges from about 1.2 to about 2.1 and functions to direct the device to the pyloric antrum of the subject to induce gastric discomfort during use of the device; wherein, the specific gravity of the device allows the device to move freely about the distal stomach and apply pressure to the antrum without otherwise affecting normal gastric function of the subject. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. An untethered, high specific gravity, hydrogel-containing, intragastric device that is at least substantially leakproof, wherein the device comprises:
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a single having a biocompatible outer surface, an inner compartment, and a sealable port in communication with the inner compartment for expanding the casing in vivo;
wherein, the casing hasa dimension ranging from a minimum of about 40 mm to a maximum of about 70 mm during operation of the device in a subject to avoid passage of any portion of the device through the lower esophageal sphincter or pyloric sphincter of the subject, limiting the intragastric device to a minimum volume of π
(40 mm)3/6 or about 33 ml and a maximum volume of π
(70 mm)3/6 or about 180 ml; and
,an aspect ratio ranging from about 1;
1 to about 2;
1 during operation of the device;a high specific gravity material, wherein the high specific gravity material has a specific gravity that is greater than 1.2 and contributes to a specific gravity of the device during use that ranges from about 1.2 to about 2.1, wherein the specific gravity functions to direct the device to the antrum of the stomach of the subject to induce gastric discomfort during use of the device; and, a hydrogel material; wherein, the intragastric device is at least substantially leakproof, functioning to provide a volume sufficient to avoid passage of any portion of the device through the lower esophageal sphincter or pyloric sphincter of the subject for a period of at least 9 months; and
,the specific gravity of the device allows the device to move freely about the distal stomach and apply pressure to the antrum without otherwise affecting normal gastric function of the subject. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. An untethered, high specific gravity, antrum-based, intragastric device, comprising:
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a single expandable casing having a biocompatible outer surface and, upon expansion, a predetermined shape for contacting the antrum of the stomach of a subject;
wherein,the expanded casing has a minimum, cross-sectional dimension of about 40 mm during operation of the device in the subject to avoid passage of any portion of the device through the lower esophageal sphincter or pyloric sphincter of the subject after expansion; a maximum, cross-sectional dimension of the predetermined shape of about 70 mm for a positioning of the predetermined shape in the pyloric antrum of the subject; the minimum and maximum cross-sectional dimensions limiting the intragastric device to a minimum volume of π
(40 mm)3/6 or about 33 ml and a maximum volume of π
(70 mm)3/6 or about 180 ml;and, a filling material comprising a biocompatible fluid component and a hydrogel component, wherein the filling material has a specific gravity greater than 1.2 and contributes to an in vivo specific gravity of the device that ranges from about 1.2 to about 2.1, the specific gravity functioning to direct the device to the pyloric antrum of the subject to induce gastric discomfort during use of the device; wherein, the specific gravity of the device allows the device to move freely about the distal stomach and apply pressure to the antrum without otherwise affecting normal gastric function of the subject. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61)
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62. An intragastric device, comprising:
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a single flexible and expandable bladder having a predetermined shape upon expansion for contacting the antrum of the stomach of a subject;
wherein,the device is designed to avoid passage of any part of the device beyond the pylorus and lower esophageal sphincter while the bladder is expanded during use in vivo; the bladder has a high specific gravity material when expanded; the high specific gravity material contributes to an in vivo specific gravity of the device that ranges from about 1.2 to about 2.1 and functions to direct the device to the pyloric antrum of the subject to induce gastric discomfort during use of the device; and, a filling material comprising a biocompatible fluid component and a hydrogel component, wherein the filling material has a specific gravity greater than 1.2; wherein, the intragastric device is limited to a minimum volume of π
(40 mm)3/6 or about 33 ml and a maximum volume of π
(70 mm)3/6 or about 180 ml;the intragastric device is at least substantially leakproof, functioning to provide a volume sufficient to avoid passage of any portion of the device through the lower esophageal sphincter or pyloric sphincter of the subject for a period of at least 9 months; and
,the specific gravity of the device allows the device to move freely about the distal stomach and apply pressure to the antrum without otherwise affecting normal gastric function of the subject. - View Dependent Claims (63, 64, 65, 66, 67, 68, 69, 70, 71)
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Specification