EP0894473B1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Medical diagnosis, treatment and imaging systems
Assignee: Biosense Webster Inc
•
Filing: 1995-01-24
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Granted: 2003-11-12
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Expires: 2015-01-24
Abstract
Abstract A locating system for determining the location and orientation of an invasive medical instrument, for example a catheter (10) or endoscope, relative to a reference frame, comprising: a plurality of field generators (18, 20 ,22) which generate known, distinguishable fields, preferably continuous AC magnetic fields, in response to drive signals; a plurality of sensors (30, 32, 34) situated in the invasive medical instrument (10) proximate the distal end thereof which generate sensor signals in response to said fields; and a signal processor (26) which has an input for a plurality of signals corresponding to said drive signals and said sensor signals and which produces the three location coordinates and three orientation coordinates of a point on the invasive medical instrument.
Inventors
- 👤 Shiomo Ben-Haim
- 👤 Daniel Osadchy
- 👤 Udi Peless
- 👤 Ilan Greenberg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 01:58
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/68; A61B5/6846; A61B5/6847; A61B5/6852; A61B5/6859; A61B18/00; A61B18/04; A61B18/12; A61B18/14; A61B18/1492; A61B34/00; A61B34/20; A61B5/06; A61B5/061; A61B5/062; A61B5/6801; A61B5/6843; A61B8/00; A61B8/08; A61B8/0833; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0133; A61M25/0147; A61B2018/00636; A61B2018/00773; A61B2018/00869; A61B2034/2046; A61B2034/2051; A61B90/00; A61B90/36; A61B2090/364; A61B2090/367; A61B90/37; A61B2090/378; A61B90/39; A61B2090/3954; A61B2090/3958; A61B2562/00; A61B2562/16; A61B2562/17; A61N; A61N1/00; A61N1/18; A61N1/32; A61N1/36; A61N1/362; A61N1/3627
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
76 words
A system comprising an invasive medical instrument (10) having three magnetic field sensors (14)
proximate the distal end (15) thereof, wherein each sensor comprises a coil (30, 32, 34),
said magnetic field sensors being arranged to generate sensor signals characterised in
that the system comprises a signal processor (26) which has an input for said sensor signals and
which produces three location coordinates and three orientation coordinates of the
distal end of the invasive medical instrument.
Claim 2
Dependent Claim
25 words
The system of claim 1, wherein said plurality of coils (30, 32, 34) have axes which
intersect within one of said coils (30, 32, 34).
Claim 3
Dependent Claim
25 words
The system of claim 1 or claim 2,
wherein said three coils (30, 32, 34) have axes which do not all intersect in a point.
Claim 4
Independent Claim
20 words
The system of any of the preceding claims, the instrument (10) further comprising an
ultrasound transducer at said distal end.
Claim 5
Dependent Claim
26 words
The system of claim 4 wherein said ultrasound
transducer provides a representation of the acoustic
properties of tissue beyond and along the axis of the
catheter.
Claim 6
Dependent Claim
13 words
The system of claim 5 wherein said representation
is a one dimensional representation.
Claim 7
Dependent Claim
13 words
The system of claim 5 wherein said representation
is a two dimensional representation.
Claim 8
Independent Claim
19 words
The system of any of Claims 1-3, the instrument (10) further
comprising an electrical probe at said distal end.
Claim 9
Dependent Claim
33 words
The system of claim 8, wherein said electrical
probe is adapted to sense electrical signals generated by
tissue which is in contact and conduct said signals to the
proximal end of the catheter.
Claim 10
Dependent Claim
25 words
The system of claim 8 or claim 9, wherein said
electrical probe is adapted to supply an ablative electrical
signal to tissue contacting said probe.
Claim 11
Independent Claim
19 words
The system of any of claims 1-3 and including a
sensor for measuring local chemistry at the distal end.
Claim 12
Independent Claim
16 words
The system of any of the preceding claims, wherein said instrument is a
catheter or endoscope.
Claim 13
Independent Claim
20 words
The system of any of the preceding claims, and also including means for
changing the orientation of the distal end.
Claim 14
Dependent Claim
73 words
The system of claim 13 wherein the means for
changing the orientation comprises; a relatively more flexible wire passing through the
medical instrument that is attached to the distal end and
has a bend near the distal end; a relatively more rigid sleeve which is straight near
the distal end and which slideably holds the wire thereat,
whereby when the sleeve is slid over the wire, the wire and
distal end are straightened.
Claim 15
Dependent Claim
24 words
A system according to claim 14 wherein instrument
has a lengthwise axis and wherein the wire is sited off the
axis of the instrument.
Claim 16
Dependent Claim
98 words
A system according to claim 13 wherein the means
for changing the orientation comprises; a flat relatively flexible portion being slit along a
portion of the length thereof to form two portions which are
attached at a first end thereof, said first end being
attached to the distal end of the instrument; a pair of wires, one end of each of which being
attached to one of said portions at a second end thereof;
and means for changing the relative lengths of the wires
whereby the flexible element is bent, thereby steering the
distal end of the instrument.
References Cited (Backward Citations)
No citation records indexed.
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