US4368739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long intestinal catheter
Assignee: Individual
•
Filing: 1981-04-29
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Granted: 1983-01-18
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Expires: 2001-04-29
Abstract
Abstract A catheter for insertion into the small intestine via the nose, the esophagus, the stomach and the duodenum. The catheter has a pair of inflatable balloons, a first one at its downstream end, and another a short distance (10 inches or 25 cm.) upstream of the first one. The two balloons are inflated when the catheter approaches the duodenum to facilitate passage through a portion of the duodenum which is inaccessible to a doctor who has access to the jejunum during surgery. The catheter may be advanced through the small intestine by grasping one or the other of the inflated balloons through the wall of the small intestine. When one of the balloons is in the inaccessible portion of the duodenum, the other is accessible, and vice versa.
Inventors
- 👤 Richard L. Nelson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:05
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/1011; A61M2210/00; A61M2210/06; A61M2210/0618; A61M2210/10; A61M2210/1042; A61M2210/106
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
231 words
A catheter for insertion into the jejunum via the stomach and the duodenum, said catheter comprising: a flexible tube having upstream and downstream ends connected by a lumen; opening means adjacent each end of said tube; a first inflatable balloon surrounding said tube adjacent its downstream end; means for introducing an inflating gas into said first balloon; a second inflatable balloon surrounding said tube at a location spaced a fixed predetermined distance from said first balloon; all of the balloons on said catheter being spaced apart and in non-abutting, non-overlapping relation with any other balloon in all conditions of inflation of said balloons; each of said balloons comprising means manually manipulable to advance said catheter through the duodenum; means comprising said predetermined distance between said first and second inflatable balloons for placing the second balloon at an accessible location in the gastrointestinal tract, upstream of the retroperitoneal portion of the duodenum, where the second balloon can be manually manipulated to advance the catheter through the duodenum whenever the first balloon is inaccessible in said retroperitoneal portion, and for placing said first balloon at an accessible portion of the gastrointestinal tract, downstream of said retroperitoneal portion, where the first balloon can be manually manipulated to advance the catheter through the duodenum whenever the second balloon is inaccessible in the retroperitoneal portion; and means for introducing an inflating gas into said second balloon.
Claim 2
Dependent Claim
231 words
A catheter for insertion into the jejunum via the stomach and the duodenum, said catheter comprising: a flexible tube having upstream and downstream ends connected by a lumen; opening means adjacent each end of said tube; a first inflatable balloon surrounding said tube adjacent its downstream end; means for introducing an inflating gas into said first balloon; a second inflatable balloon surrounding said tube at a location spaced a fixed predetermined distance from said first balloon; all of the balloons on said catheter being spaced apart and in non-abutting, non-overlapping relation with any other balloon in all conditions of inflation of said balloons; each of said balloons comprising means manually manipulable to advance said catheter through the duodenum; means comprising said predetermined distance between said first and second inflatable balloons for placing the second balloon at an accessible location in the gastrointestinal tract, upstream of the retroperitoneal portion of the duodenum, where the second balloon can be manually manipulated to advance the catheter through the duodenum whenever the first balloon is inaccessible in said retroperitoneal portion, and for placing said first balloon at an accessible portion of the gastrointestinal tract, downstream of said retroperitoneal portion, where the first balloon can be manually manipulated to advance the catheter through the duodenum whenever the second balloon is inaccessible in the retroperitoneal portion; and means for introducing an inflating gas into said second balloon.
Claim 3
Dependent Claim
58 words
A catheter as recited in claim 1 and comprising: means at said upstream end of said tube for connecting said tube to suction means; and means, including said opening means at the downstream end of the tube, for aspirating the contents of the small bowel through said tube in response to a suction applied at said upstream end.
Claim 4
Dependent Claim
33 words
A catheter as recited in claim 1 wherein said tube comprises: means, including said lumen and said opening means at the two ends of the tube, for allowing fluid flow through said tube.
Claim 5
Dependent Claim
85 words
A catheter as recited in claim 1 wherein said means for introducing an inflating gas into said first balloon comprises: a second lumen having a first end adjacent said upstream end of said tube; means at the first end of the second lumen for connecting said second lumen to a gas source; and channel means connecting said second lumen with said first balloon for inflating the first balloon in response to the introduction of an inflating gas at said first end of the second lumen.
Claim 6
Dependent Claim
52 words
A catheter as recited in claim 4 wherein said means for introducing an inflating gas into said second balloon comprises: channel means connecting said second lumen with said second balloon for inflating the second balloon in response to the introduction of an inflating gas at said first end of the second lumen.
Claim 7
Dependent Claim
85 words
A catheter as recited in claim 4 wherein said means for introducing an inflating gas into said second balloon comprises: a third lumen having a first end adjacent said upstream end of said tube; means at the first end of the third lumen for connecting said third lumen to a gas source; and channel means connecting said third lumen with said second balloon for inflating the second balloon in response to the introduction of an inflating gas at said first end of the third lumen.
Claim 8
Dependent Claim
24 words
A catheter as recited in claim 6 wherein: said third lumen has a relatively small cross-section compared to the cross-section of said first lumen.
Claim 9
Dependent Claim
22 words
A catheter as recited in claim 7 wherein: said second lumen has a cross-section comparable to the cross-section of said third lumen.
Claim 10
Dependent Claim
24 words
A catheter as recited in claim 4 wherein: said second lumen has a relatively small cross-section compared to the cross-section of the first lumen.
Claim 11
Dependent Claim
22 words
A catheter as recited in claim 13 wherein: said predetermined distance between said first and second inflatable balloons is about ten inches.
Claim 12
Dependent Claim
34 words
A catheter as recited in claim 1 wherein: said tube has a length sufficient to extend at least from the distal end of the small bowel back through the small bowel into the stomach.
Claim 13
Dependent Claim
32 words
A catheter as recited in claim 1 wherein: said tube has a length sufficient to extend from the distal end of the small bowel back through the nose and outside the nose.
Claim 14
Independent Claim
271 words
A method for inserting into the jejunum, via the stomach and the duodenum, a catheter comprising a flexible tube having upstream and downstream ends connected by a lumen, a first inflatable balloon surrounding said tube adjacent said downstream end, and means for introducing an inflating gas into said first balloon, said first balloon comprising means manipulable to advance said catheter through the duodenum, said method comprising the steps of: providing said catheter with a second inflatable balloon surrounding said tube at a location spaced a fixed predetermined distance from said first balloon and with means for introducing an inflating gas into said second balloon, said second balloon comprising means manipulable to advance said catheter through the duodenum; all of the balloons in said catheter being spaced apart and in non-abutting, non-overlapping relation with any other balloon in all conditions of inflation of said balloons; advancing said catheter through the gastrointestinal tract by manually manipulating one of said balloons until said first balloon is inaccessible in the retroperitoneal portion of the duodenum; the predetermined distance between said first and second inflatable balloons being such as to place the second balloon at an accessible location in the gastrointestinal tract, upstream of the retroperitoneal portion of the duodenum, whenever the first balloon is inaccessible in said retroperitoneal portion, and to place said first balloon at an accessible portion of the gastrointestinal tract, downstream of said retroperitoneal portion, whenever the second balloon is inaccessible in the retroperitoneal portion; and then advancing said catheter further through the duodenum downstream of said retroperitoneal portion by manually manipulating said second balloon until the first balloon again becomes accessible.
Claim 15
Independent Claim
271 words
A method for inserting into the jejunum, via the stomach and the duodenum, a catheter comprising a flexible tube having upstream and downstream ends connected by a lumen, a first inflatable balloon surrounding said tube adjacent said downstream end, and means for introducing an inflating gas into said first balloon, said first balloon comprising means manipulable to advance said catheter through the duodenum, said method comprising the steps of: providing said catheter with a second inflatable balloon surrounding said tube at a location spaced a fixed predetermined distance from said first balloon and with means for introducing an inflating gas into said second balloon, said second balloon comprising means manipulable to advance said catheter through the duodenum; all of the balloons in said catheter being spaced apart and in non-abutting, non-overlapping relation with any other balloon in all conditions of inflation of said balloons; advancing said catheter through the gastrointestinal tract by manually manipulating one of said balloons until said first balloon is inaccessible in the retroperitoneal portion of the duodenum; the predetermined distance between said first and second inflatable balloons being such as to place the second balloon at an accessible location in the gastrointestinal tract, upstream of the retroperitoneal portion of the duodenum, whenever the first balloon is inaccessible in said retroperitoneal portion, and to place said first balloon at an accessible portion of the gastrointestinal tract, downstream of said retroperitoneal portion, whenever the second balloon is inaccessible in the retroperitoneal portion; and then advancing said catheter further through the duodenum downstream of said retroperitoneal portion by manually manipulating said second balloon until the first balloon again becomes accessible.
Claim 16
Dependent Claim
30 words
A method as recited in claim 13 and comprising: advancing said catheter further downstream, when said second balloon is inaccessible in said retroperitoneal portion, by manually manipulating said first balloon.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |