US5042486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter locatable with non-ionizing field and method for locating same
Assignee: Siemens AG
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Filing: 1990-09-12
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Granted: 1991-08-27
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Expires: 2010-09-12
Abstract
Abstract A catheter locatable with a non-ionizing field, such as an electromagnetic or acoustic field, has a transmitting or receiving antenna for the relevant field at its tip. Receiving or transmitting antennas for the non-ionizing field are attached to a patient in which the catheter is disposed. A receiver or transmitter is connected to these antennas, and converts the received field waves into electrical locating or image signals. The location of the catheter tip is then portrayed on a display combined with an image of the blood vessel structure acquired in a different manner, such as by x-ray imaging.
Inventors
- 👤 Manfred Pfeiler
- 👤 Helmut Ermert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:22
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/52; A61B8/5215; A61B8/5238; A61B34/00; A61B34/20; A61B5/00; A61B5/06; A61B5/061; A61B5/062; A61B8/08; A61B8/0833; A61B2034/2046; A61B2034/2051; A61B90/00; A61B90/39; A61B2090/3925; A61B2090/3929
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
56 words
A method for real-time locating of a catheter in a vessel in a patient comprising the steps of: obtaining a radiological vessel image; obtaining an image using ionizing radiation of a catheter in a vessel contained within said vessel image using a non-ionizing field; and superimposing said image of said catheter on said radiological vessel image.
Claim 2
Independent Claim
56 words
A method for real-time locating of a catheter in a vessel in a patient comprising the steps of: obtaining a radiological vessel image; obtaining an image using ionizing radiation of a catheter in a vessel contained within said vessel image using a non-ionizing field; and superimposing said image of said catheter on said radiological vessel image.
Claim 3
Dependent Claim
38 words
A method as claimed in claim 1 wherein the step of obtaining an image of said catheter using a non-ionizing field is further defined by obtaining an image of a tip of said catheter using said non-ionizing field.
Claim 4
Dependent Claim
86 words
A method as claimed in claim 1 wherein the step of obtaining an image of said catheter using a non-ionizing field is further defined by the steps of: operating an antenna disposed at a tip of said catheter as a transmitting antenna for non-ionizing field signals; receiving the non-ionizing field signals from said transmitting antenna by a plurality of receiving antennas disposed externally at a surface of said patient; and converting the received signals into electrical image signals for generating an image of said catheter tip.
Claim 5
Dependent Claim
86 words
A method as claimed in claim 1 wherein the step of obtaining an image of said catheter using a non-ionizing field is further defined by the steps of: operating an antenna disposed at a tip of said catheter as a receiving antenna for non-ionizing field signals; transmitting the non-ionizing field signals to said receiving antenna from a plurality of transmitting antennas disposed externally at a surface of said patient; and converting the received signals into electrical image signals for generating an image of said catheter tip.
Claim 6
Dependent Claim
35 words
A method as claimed in claim 1 wherein the step of obtaining an image of said catheter using a non-ionizing field is further defined by obtaining an image of said catheter using an electromagnetic field.
Claim 7
Dependent Claim
35 words
A method as claimed in claim 1 wherein the step of obtaining an image of said catheter using a non-ionizing field is further defined by obtaining an image of said catheter using an acoustic field.
Claim 8
Dependent Claim
55 words
A method as claimed in claim 1 wherein the step of obtaining an image of said catheter using a non-ionizing field as further defined by the step of: locating the successive positions of said catheter in a chronological sequence to describe a continuous image of the path which the tip of said catheter has traversed.
Claim 9
Dependent Claim
38 words
A method as claimed in claim 1 comprising the additional steps of: providing said catheter with a plurality of individually locatable segments; and identifying the location and direction of a tip of said catheter using said locatable segments.
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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) | 1994-08-26 | 1995-02-25 | 1995-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-26 | 1999-02-25 | 1999-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-26 | 2003-02-25 | 2003-08-27 | $7700.00 | Window Closed / Lapsed |