EP0832670A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Radiation delivery catheter with reinforcing mandrel
Assignee: Abbott Cardiovascular Systems Inc
•
Filing: 1997-08-28
•
Granted: —
•
Expires: 2017-08-28
Abstract
Abstract The invention is directed to a rapid exchange-type intravascular catheter suitable for maintaining patency of a body lumen for a period of time sufficient to permit delivery of a radiation source to the body lumen. The catheter utilizes a reinforcing mandrel to improve the pushability and strength of the catheter as it tracks along a guide wire, and permits blood flow through an inflatable member while radiation therapy is being provided.
Inventors
- 👤 Gary Schneiderman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 00:44
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/10; A61M25/104; A61N; A61N5/00; A61N5/10; A61N5/1001; A61N5/1002; A61M25/0043; A61M2025/0063; A61M25/01; A61M2025/0183; A61M2025/1043; A61M2025/1056; A61M2025/1072; A61M2025/1086; A61M25/1002; A61N2005/1003
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
238 words
An intravascular catheter (10) for delivering and maintaining a
radioactive dose in a body lumen, comprising: an elongated catheter body (11) having a proximal end and a distal
end; an inflation lumen (16) extending within the elongated catheter
body to a location on a distal portion of the elongated body; an inflatable member (12) disposed on the distal portion of the
elongated catheter body and having an interior in fluid communication with the inflation
lumen; a guide wire lumen (14) extending through a portion of the
elongated catheter body for receiving a guide wire (18); a first guide wire port (15) in the distal end of the catheter body in
communication with the guide wire lumen and a second guide wire port (17) in the distal
portion of the catheter body which is spaced a short distance from the distal end of the
catheter body and a substantial distance from the proximal end of the catheter body and
which is in communication with the guide wire lumen; a blind lumen (19) extending with the elongated catheter body from
the proximal end of the catheter body and terminating at a position near the distal end
of the inflatable member, the blind lumen adapted to receive a radiation source wire
(23); and a reinforcing mandrel (21) disposed within the elongated catheter
body for increasing the pushability and stiffness of the catheter body as it is tracked
along a guide wire.
Claim 2
Dependent Claim
17 words
The catheter of claim 1, wherein the reinforcing mandrel (21) is
disposed within the blind lumen (19).
Claim 3
Dependent Claim
17 words
The catheter of claim 2, wherein the reinforcing mandrel (21) is
movable within the blind lumen (19).
Claim 4
Dependent Claim
18 words
The catheter of claim 1, wherein the reinforcing mandrel (21) is
permanently affixed within the elongated catheter body.
Claim 5
Dependent Claim
51 words
The catheter of claim 1, wherein the inflatable member (12) is an
inflatable balloon and further including a plurality of a plurality of collars (33) affixed
over the inflatable balloon to create a plurality of balloon sections (34) for enhancing
centering of the radiation source wire (23) within the body lumen.
Claim 6
Dependent Claim
27 words
The catheter of claim 1, wherein the radiation source wire (23) has
a proximal end and a distal end which has a radiation source (24) associated therewith.
Claim 7
Dependent Claim
34 words
The catheter of claim 6, wherein the radiation source wire (23)
delivers a low dosage of radiation to the body lumen at a position (31, 32) where the
inflatable balloon contacts the body lumen.
Claim 8
Dependent Claim
27 words
The catheter of claim 7, wherein the level of radiation delivered is
in the range of about 20 to 3000 rads in no less than two minutes.
Claim 9
Dependent Claim
36 words
The catheter of claim 1, wherein the inflatable member (12) is
configured to center the radiation source wire (23) within the body lumen so that
substantially equal amounts of radiation are directed to the body lumen.
Claim 10
Dependent Claim
30 words
The catheter of claim 1, wherein the blind lumen (19) terminates
in the distal end of the elongated catheter body and is sealed from bodily fluids in the
body lumen.
Claim 11
Dependent Claim
26 words
The catheter of claim 1, wherein the body lumen is a coronary
artery and the catheter (10) is sized for intraluminal delivery into the coronary arteries.
Claim 12
Dependent Claim
33 words
The catheter of claim 6, wherein the radiation source wire (23)
includes a radiation source (24) taken from the group of radiation sources having a half
life of less than one hundred days.
Claim 13
Dependent Claim
37 words
The catheter of claim 6, wherein the radiation source wire (23)
includes a radiation source (24) taken from the group which includes iridium 192 , cobalt 60 ,
vanadium 48 , gold 198 and phosphorus 32 .
Claim 14
Dependent Claim
27 words
The catheter of claim 6, wherein the radiation source wire (23)
includes a radiation source (24) taken from the group which includes alpha-, beta- and
gamma-emitting radiation.
Claim 15
Independent Claim
380 words
A method of maintaining the patency of a body lumen for a period
of time sufficient to permit delivery of a radiation source to the body lumen, comprising: a) providing a catheter (10) having: an elongated catheter body (11) having proximal and distal
ends; an inflation lumen (16) extending within the elongated
catheter body to a location on a distal portion of the elongated body; an inflatable member (12) disposed on the distal portion of
the elongated catheter body and having an interior in fluid communication with the
inflation lumen; a guide wire lumen (14) extending through a portion of the
elongated catheter body for receiving a guide wire (18); a first guide wire port (15) in the distal end of the catheter
body in communication with the guide wire lumen and a second guide wire port (17) in
the distal portion of the catheter body which is spaced a short distance from the distal
end of the catheter body and a substantial distance from the proximal end of the catheter
body and which is in communication with the guide wire lumen; a blind lumen (19) extending with the elongated catheter
body from the proximal end of the catheter body and terminating at a position near the
distal end of the inflatable member, the blind lumen adapted to receive a radiation source
wire (23); and a reinforcing mandrel (21) disposed within the elongated
catheter body for increasing the pushability and stiffness of the catheter body as it is
tracked along a guide wire; b) positioning the guide wire (18) in the body lumen; c) advancing the catheter (10) over the guide wire by inserting
the guide wire into the first guide wire port (15) of the catheter body and into the guide
wire lumen; d) advancing the elongated catheter body over the guide wire
by manipulating the reinforcing mandrel (21) until the inflation member is positioned in
the body lumen; e) expanding the inflatable member (12) into contact with the
body lumen; f) centering the blind lumen (19) in the body lumen; g) inserting a radiation source wire (23) in the blind lumen for
delivering a radiation dose to the body lumen; h) deflating the inflatable member; and I) withdrawing the catheter and the radiation source wire from
the lumen.
References Cited (Backward Citations)
US5158548A
Cited
US5242399A
Cited
US5344426A
Cited
WO1992017236A1
Cited
US5421955A
Cited
US5514154A
Cited
US5421955B1
Cited
US5360401A
Cited
US5503613A
Cited
EP0688580A1
Cited
WO1996010436A1
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.