US6004316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the treatment of patent ductus arteriosus
Assignee: Terumo Corp
•
Filing: 1998-09-21
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Granted: 1999-12-21
•
Expires: 2018-09-21
Abstract
Abstract A device and method for treating patent ductus arteriosus in a human. A catheter having a collapsible/expandable heating element at a distal end for entering an infant transcutaneously and being advanced to the ductus arteriosus. A method of heating the inner surface of the ductus arteriosus with the heating element to a temperature sufficient to produce a material change in the collagen of the ductus arteriosus such that the ductus arteriosus passage shrinks to closure.
Inventors
- 👤 Michael D. Laufer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:03
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/18; A61B18/20; A61B18/22; A61B18/28; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B17/00; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2018/00053; A61B2018/00214; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B18/1206; A61B2018/1246; A61B2018/1253; A61B2018/126; A61B2018/1405; A61B2018/1435
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
A method for closing a patent ductus arteriosus of a patient, comprising the steps of: entering the vascular system of the patient; advancing a catheter having a non-laser heating element associated with a distal end portion through the vascular system of the patient into the ductus arteriosus; positioning the heating element within the ductus arteriosus at a first position; and energizing the heating element to reduce at least the first portion of the ductus arteriosus without ablating tissue of the ductus arteriosus.
Claim 2
Independent Claim
82 words
A method for closing a patent ductus arteriosus of a patient, comprising the steps of: entering the vascular system of the patient; advancing a catheter having a non-laser heating element associated with a distal end portion through the vascular system of the patient into the ductus arteriosus; positioning the heating element within the ductus arteriosus at a first position; and energizing the heating element to reduce at least the first portion of the ductus arteriosus without ablating tissue of the ductus arteriosus.
Claim 3
Dependent Claim
42 words
The method of claim 1 further comprising: withdrawing the catheter a sufficient distance to position the heating element at a second position; and energizing the heating element to a temperature sufficient to reduce at least a second portion of the ductus arteriosus.
Claim 4
Dependent Claim
33 words
The method of claim 1 further comprising: sensing a predetermined parameter; and automatically decreasing the magnitude of the energy being delivered by the heating element when the predetermined parameter reaches a preselected value.
Claim 5
Dependent Claim
18 words
The method of claim 1 wherein the non-laser heating element is energized by applying radio frequency electric energy.
Claim 6
Dependent Claim
27 words
The method of claim 4 wherein the power of the radio frequency electric energy applied is in the range of about 1 watt to about 10 watts.
Claim 7
Dependent Claim
28 words
The method of claim 1 wherein the radio frequency electric energy is applied for a length of time in the range of about 10 to about 120 seconds.
Claim 8
Dependent Claim
24 words
The method of claim 1 further comprising: focusing the energy at a distal most portion of the heating element as the ductus arteriosus closes.
Claim 9
Dependent Claim
27 words
The method of claim 1 wherein the energizing step comprises controlling the amount of energy applied such that closing occurs without rupturing or perforating the ductus arteriosus.
Claim 10
Dependent Claim
27 words
The method of claim 1 wherein the heating element is energized to a temperature in the range of about 50 degrees Celsius to about 98 degrees Celsius.
Claim 11
Dependent Claim
14 words
The method of claim 1 further comprising sensing the closing of the ductus arteriosus.
Claim 12
Dependent Claim
28 words
The method of claim 1 further comprising maintaining the heating element in contact with the ductus arteriosus as the at least first portion of the ductus arteriosus closes.
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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) | 2002-12-20 | 2003-06-21 | 2003-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-12-20 | 2007-06-21 | 2007-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-12-20 | 2011-06-21 | 2011-12-21 | $7700.00 | Window Closed / Lapsed |