Patent US2762001A successfully refreshed from Google Patents.
US4384584A
Expired / Lapsed
US
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Method and means for esophageal feeding
Assignee: Individual
•
Filing: 1981-10-28
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Granted: 1983-05-24
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Expires: 2001-10-28
Abstract
Abstract A naso-esophageal catheter is provided with an inflatable balloon at its distal end and a signal-emitting device is located within the balloon so that the location of the distal end of the catheter can be determined when it is advanced into the patient's esophagus. After the catheter has been advanced into the patient's esophagus, the balloon is inflated. Thereafter, a trans-cervical esophageal catheter is directed through the patient's neck towards the center of the inflated balloon. After the balloon has been punctured the naso-esophageal catheter is withdrawn and the patient can then be fed with liquid nutrients through the trans-cervical esophageal catheter.
Inventors
- 👤 Allen S. Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:29
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0069; A61J; A61J15/00; A61J15/0003; A61M25/01; A61M25/0105; A61M25/06; A61J15/0015; A61J15/0026; A61J15/003; A61J15/0046; A61J15/0049; A61M2205/00; A61M2205/33; A61M2205/3317; A61M25/0127
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
220 words
The method of inserting a catheter type feeding tube into a patient's esophagus which comprises inserting a soft flexible first catheter into the oral or nasal passage of the patient and advancing the catheter until its distal end is located within the esophagus, said catheter comprising a tube having a collapsed balloon adjacent its distal end adapted to be inflated by fluid directed through a passageway in the catheter extending from within the balloon to the proximal end of the catheter, inflating the balloon to expand the surrounding portion of the esophagus, determining the location of the expanded portion of the esophagus on the exterior surface of the patient's neck, penetrating at said location through the patient's neck and into the expanded esophagus and balloon with a second catheter comprising a tube provided with a projecting needle at its distal end to collapse the balloon and simultaneously position the distal end of the second catheter within the esophagus, retracting the needle from the second catheter and, thereafter, disengaging the distal end of the second catheter from within the balloon and completely withdrawing the first catheter through the nasal or oral passageway in the patient whereby the proximal end of the second catheter is adapted to be connected to a source of liquid nutrient for conducting it into the patient's esophagus.
Claim 2
Independent Claim
220 words
The method of inserting a catheter type feeding tube into a patient's esophagus which comprises inserting a soft flexible first catheter into the oral or nasal passage of the patient and advancing the catheter until its distal end is located within the esophagus, said catheter comprising a tube having a collapsed balloon adjacent its distal end adapted to be inflated by fluid directed through a passageway in the catheter extending from within the balloon to the proximal end of the catheter, inflating the balloon to expand the surrounding portion of the esophagus, determining the location of the expanded portion of the esophagus on the exterior surface of the patient's neck, penetrating at said location through the patient's neck and into the expanded esophagus and balloon with a second catheter comprising a tube provided with a projecting needle at its distal end to collapse the balloon and simultaneously position the distal end of the second catheter within the esophagus, retracting the needle from the second catheter and, thereafter, disengaging the distal end of the second catheter from within the balloon and completely withdrawing the first catheter through the nasal or oral passageway in the patient whereby the proximal end of the second catheter is adapted to be connected to a source of liquid nutrient for conducting it into the patient's esophagus.
Claim 3
Dependent Claim
22 words
The method called for in claim 1 wherein the second catheter is advanced further into the esophagus after the balloon is collapsed.
Claim 4
Dependent Claim
24 words
The method called for in claim 1 wherein the first and second catheters are advanced further into the esophagus after the balloon is collapsed.
Claim 5
Dependent Claim
33 words
The method called for in claim 1 wherein the second catheter is directed through said location in the patient's neck and into the inflated balloon in a direction inclined downwardly into the esophagus.
Claim 6
Dependent Claim
40 words
The method called for in claim 4 wherein the first catheter is advanced further into the esophagus relative to the second catheter after the balloon is collapsed to disengage the distal end of the second catheter from within the balloon.
Claim 7
Dependent Claim
22 words
The method called for in claim 5 wherein the second catheter is advanced further into the esophagus before the needle is retracted.
Claim 8
Dependent Claim
38 words
The method called for in claim 1 wherein the balloon is inflated with a liquid which, when the balloon is penetrated by said needle, flows through the second catheter to visibly indicate that the balloon has been punctured.
Claim 9
Dependent Claim
31 words
The method called for in claim 7 wherein the liquid is colored and the determination that the balloon has been punctured is visibly indicated through the tube of the second catheter.
Claim 10
Dependent Claim
33 words
The method called for in claim 1 wherein said first catheter has a signal-emitting member in said balloon which enables determination of the location of the balloon from exteriorly of the patient's neck.
Claim 11
Dependent Claim
45 words
The method called for in claim 9 wherein the signal-emitting member comprises a light source and the determination of the location of the distal end of the first catheter within the esophagus is made by visually observing said light source exteriorly of the patient's neck.
Claim 12
Dependent Claim
39 words
The method called for in claim 9 wherein said signal-emitting member comprises a magnetic body and the determination of the location of the distal end of the first catheter within the esophagus is accomplished by utilizing a magnetic indicator.
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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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |