Patent US4576590A successfully refreshed from Google Patents.
US4576590A
Expired / Lapsed
US
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Intraluminal membrane oxygenator method for a tubular organ of the gastrointestinal tract
Assignee: Instrumentarium Oyj
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Filing: 1983-12-29
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Granted: 1986-03-18
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Expires: 2003-12-29
Abstract
Abstract Apparatus and method for intraluminal membrane oxygenation of internal organs. A catheter having a walled chamber is introduced to dispose the chamber against the lumen of an internal organ. The wall of the chamber is of a material which is freely permeable to gases, such as oxygen and carbon dioxide, and poorly permeable to liquid. Oxygen is introduced into the catheter and perfused through the walled chamber. Oxygen passes through the wall of the chamber to the organ while carbon dioxide from the organ passes through the wall of the chamber.
Inventors
- 👤 Richard G. Fiddian-Green
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:21
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/14; A61M1/16; A61M1/1678; A61M25/00; A61M25/01; A61M25/0105; A61M25/0127; A61M25/10; A61M1/1698; A61M2202/00; A61M2202/02; A61M2202/0208; A61M2202/0225; A61M2210/00; A61M2210/10; A61M2210/1042; A61M2210/106
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
202 words
A method for intraluminal membrane oxygenation of a tubular internal organ of the gastrointestinal tract independently of the vascular blood supply to the organ which comprises introducing a catheter having a closed cylindrical walled chamber on a tube into the organ so as to dispose the wall of the chamber in contact with and against the lumen of the organ, said tube having an entrance to and an exit from said chamber which are disposed axially spaced apart along the length of the catheter, the wall of said chamber comprising a material which is freely permeable to gas but poorly permeable to liquid, perfusing the interior of the chamber via said tube with oxygen to create a pressure gradient between the chamber and the lumen of the organ so as to cause oxygen to diffuse through the wall of the chamber to the lumen of the organ by introducing oxygen into the tube at an external inlet, conducting the oxygen through the tube and into the chamber, thence axially through the chamber along the wall thereof, and thence from the chamber through the tube to an external outlet, and continuing the perfusion step for a sufficient time to conduct the oxygenation procedure.
Claim 2
Independent Claim
202 words
A method for intraluminal membrane oxygenation of a tubular internal organ of the gastrointestinal tract independently of the vascular blood supply to the organ which comprises introducing a catheter having a closed cylindrical walled chamber on a tube into the organ so as to dispose the wall of the chamber in contact with and against the lumen of the organ, said tube having an entrance to and an exit from said chamber which are disposed axially spaced apart along the length of the catheter, the wall of said chamber comprising a material which is freely permeable to gas but poorly permeable to liquid, perfusing the interior of the chamber via said tube with oxygen to create a pressure gradient between the chamber and the lumen of the organ so as to cause oxygen to diffuse through the wall of the chamber to the lumen of the organ by introducing oxygen into the tube at an external inlet, conducting the oxygen through the tube and into the chamber, thence axially through the chamber along the wall thereof, and thence from the chamber through the tube to an external outlet, and continuing the perfusion step for a sufficient time to conduct the oxygenation procedure.
Claim 3
Dependent Claim
29 words
A method as set forth in claim 1 in which oxygen is carried by a fluid and introduced into the catheter via a pumping mechanism connected with the tube.
Claim 4
Dependent Claim
29 words
A method as set forth in claim 2 in which the fluid is provided with blood or a blood substitute to enhance the oxygen bearing capacity of the fluid.
Claim 5
Dependent Claim
22 words
A method as set forth in claim 1 in which a vasodialator is also introduced via the catheter to enhance local oxygenation.
Claim 6
Dependent Claim
38 words
A method as set forth in claim 1 in which carbon dioxide which diffuses from the lumen of the organ through the wall of the chamber is conveyed with returning flow passing from the chamber through the tube.
Claim 7
Dependent Claim
21 words
A method as set forth in claim 1 in which oxygen is introduced at a PO 2 of about 760 mm.Hg.
References Cited (Backward Citations)
FR1280481A
Cited
US3505686A
Cited
US3512517A
Cited
US4265249A
Cited
US4387711A
Cited
US4448188A
Cited
US4451251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |