Patent EP0830873A2 successfully refreshed from Google Patents.
EP0830873A2
Expired / Lapsed
EP
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Medical wire connected to an implanted device and method for using the same
Assignee: Kaneka Medix Corp
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Filing: 1997-09-10
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Granted: —
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Expires: 2017-09-10
Abstract
Abstract A medical wire includes a conductive guide wire and an implanted device, which are connected to each other through a joint member. The joint member is heated by applying a high-frequency current through the guide wire, whereby the joint member is melted and severed so as to detach the implanted device from the guide wire. The joint member is composed of a rod of a swelling resin, the outer diameter of which increases by at least 10% when brought into contact with water. The medical wire may be inserted into a patient's body through a catheter arranged in the patient's body, during which an impedance reducing phenomenon that occurs between the guide wire and a counter electrode provided on the patient's body is detected, thereby confirming that the implanted device has been deposited properly in the patient's body.
Inventors
- 👤 Atsushi Ogawa
- 👤 Waro Taki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 04:11
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12131; A61B17/1214; A61B17/12145; A61B17/12163; A61B17/12181; A61B17/1219; A61M; A61M25/00; A61M25/01; A61M25/09; A61M2025/09058; A61M2025/09083
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
90 words
A medical wire having an implanted device, in
which the implanted device is connected to a distal end of a
conductive guide wire through a joint member, and the joint
member is heated by applying a high-frequency current
through the guide wire, whereby the joint member is melted
and severed so as to detach the implanted device from the
guide wire, wherein the joint member is composed of a rod of
a swelling resin, the outer diameter of which increases by
at least 10% when brought into contact with water.
Claim 2
Dependent Claim
50 words
The medical wire according to Claim 1, wherein the
joint member is connected to the guide wire by inserting
its proximal part into a coiled distal part of the guide
wire and connected to the implanted device by inserting its
distal part into a coil portion forming the implanted
device.
Claim 3
Dependent Claim
44 words
The medical wire according to Claim 2, wherein the
outer diameter of the joint member in a swollen state is
greater than any of the outer diameters of the coiled distal
part of the guide wire and the coil portion forming the
implanted device.
Claim 4
Dependent Claim
24 words
The medical wire according to Claim 1, wherein the
joint member has an outer diameter of 0.10 to 0.35 mm in an
unswollen state.
Claim 5
Dependent Claim
24 words
The medical wire according to Claim 4, wherein the
joint member has an outer diameter of 0.25 to 1.00 mm in a
swollen state.
Claim 6
Dependent Claim
23 words
The medical wire according to Claim 1, wherein the
joint member has breaking strength of at least 100 g in a
swollen state.
Claim 7
Dependent Claim
21 words
The medical wire according to Claim 1, wherein the
joint member is made of poly(vinyl alcohol) or a vinyl
alcohol copolymer.
Claim 8
Dependent Claim
40 words
The medical wire according to Claim 1, wherein a
clearance between the distal end of the guide wire and the
proximal end of the implanted device connected through the
joint member to the guide wire, is 0.3 to 5.0 mm.
Claim 9
Dependent Claim
43 words
The medical wire according to Claim 1, wherein the
joint member is melted and severed by applying a high-frequency
current of a frequency of 100 to 5,000 kHz and
power of 0.1 to 20 W between the guide wire and a counter
electrode.
Claim 10
Independent Claim
122 words
A method for using a medical wire through a
catheter arranged in a patient's body, said medical wire
having an implanted device, in which the implanted device is
connected to a distal end of a conductive guide wire
through a joint member, and the joint member is heated by
applying a high-frequency current through the guide wire,
whereby the joint member is melted and severed so as to
detach the implanted device from the guide wire, wherein the
joint member is composed of a rod of a swelling resin, the
outer diameter of which increases by at least 10% when
brought into contact with water; the method comprises dipping the joint member in a
saline solution before insertion into the patient's body.
Claim 11
Independent Claim
171 words
A method for using a medical wire through a
catheter arranged in a patient's body, said medical wire
having an implanted device, in which the implanted device is
connected to a distal end of a conductive guide wire
through a joint member, and the joint member is heated by
applying a high-frequency current through the guide wire,
whereby the joint member is melted and severed so as to
detach the implanted device from the guide wire, wherein the
joint member is composed of a rod of a swelling resin, the
outer diameter of which increases by at least 10% when
brought into contact with water; the method comprises inserting the guide wire into the
catheter in a state that high-frequency voltage for
measurement is applied between the guide wire and a counter
electrode provided on the patient's body, and detecting an
impedance reducing phenomenon that an impedance between the
guide wire and the counter electrode reduces rapidly,
thereby confirming that the implanted device has been
deposited properly in the patient's body.
References Cited (Backward Citations)
No citation records indexed.
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