Patent EP0476796A1 successfully refreshed from Google Patents.
EP0476796A1
Expired / Lapsed
EP
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Pressure responsive valve catheter
Assignee: Angiodynamics Inc
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Filing: 1991-09-13
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Granted: —
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Expires: 2011-09-13
Abstract
Abstract A catheter (10) for introducing material into the vascular system is provided. The catheter includes an elongated catheter body (12) having a side wall (14) defining a catheter lumen (16). The catheter body has a proximal portion (18). Material can be introduced into the catheter lumen at its proximal portion. The catheter body has a distal portion (22). The distal portion has a single wall in an exit zone (24). At least one pressure responsive exit (26) is formed in the side wall of the distal portion of the catheter body. The pressure responsive exit permits material to exit from the catheter lumen in response to a pressure over a first pre-determined amount while preventing material from entering into the catheter lumen at a pressure less than a second pre- determined amount.
Inventors
- 👤 William M. Appling
- 👤 Joseph J. Bookstein
- 👤 Eamonn Hobbs
- 👤 Daniel K. Recinella
- 👤 Arthur L. Zimmet
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 07:54
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0074; A61M25/0075; A61B; A61B17/00; A61B17/22; A61B2017/22082; A61B2017/22084
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
113 words
A catheter for introducing material into the vascular system comprising: an elongated catheter body having a sidewall defining a catheter lumen, the catheter body having a proximal portion with means through which material is introduced into the catheter lumen and a distal portion, said distal portion being a single wall in an exit zone; and at least one pressure responsive exit formed in the sidewall of the distal portion of said catheter body, said pressure responsive exit permitting material to exit from said catheter lumen in response to a pressure over a first predetermined amount while preventing material from entering into said catheter lumen at a pressure less than a second predetermined amount.
Claim 2
Dependent Claim
113 words
A catheter for introducing material into the vascular system comprising: an elongated catheter body having a sidewall defining a catheter lumen, the catheter body having a proximal portion with means through which material is introduced into the catheter lumen and a distal portion, said distal portion being a single wall in an exit zone; and at least one pressure responsive exit formed in the sidewall of the distal portion of said catheter body, said pressure responsive exit permitting material to exit from said catheter lumen in response to a pressure over a first predetermined amount while preventing material from entering into said catheter lumen at a pressure less than a second predetermined amount.
Claim 3
Dependent Claim
17 words
The catheter of claim 1 wherein said second predetermined amount is less than said first predetermined amount.
Claim 4
Dependent Claim
21 words
The catheter of claim 1 wherein said sidewall, at the vicinity of said pressure responsive exit, is composed of resilient material.
Claim 5
Dependent Claim
20 words
The catheter of claim 3 wherein said at least one pressure responsive exit is a slit formed in said sidewall.
Claim 6
Dependent Claim
28 words
The catheter of claim 3 wherein there are a plurality of spaced apart pressure responsive exits formed in the sidewall of the distal portion of the catheter body.
Claim 7
Dependent Claim
22 words
The catheter of claim 4 wherein each of said plurality of pressure responsive exits are slits formed in said catheter body sidewall.
Claim 8
Dependent Claim
18 words
The catheter of claim 6 wherein said plurality of slits are longitudinally and radially displaced from one another.
Claim 9
Dependent Claim
35 words
The catheter of claim 3 wherein said distal catheter portion is an exposed coil having a first state in which it is compressed and a second non-compressed state where said coil defines a spiral slit.
Claim 10
Dependent Claim
23 words
The catheter of claim 3 wherein said distal catheter portion is an exposed braid having a plurality of small openings between interwoven wires.
Claim 11
Dependent Claim
21 words
The catheter of claim 6 wherein said slits are equal in size and wherein said slits are equidistant from one another.
Claim 12
Dependent Claim
21 words
The catheter of claim 10 wherein said slits are at an angle of about forty-five degrees to a longitudinal sidewall line.
Claim 13
Dependent Claim
15 words
The catheter of claim 10 wherein said slits are parallel to a longitudinal sidewall line.
Claim 14
Dependent Claim
15 words
The catheter of claim 10 wherein the distal portion is about 0.98 inches in length.
Claim 15
Dependent Claim
15 words
The catheter of claim 10 wherein the distal portion is about 8.0 inches in length.
Claim 16
Dependent Claim
50 words
The catheter of claim 13 or 14 wherein the slits are longitudinally spaced apart from one another by about 0.1 inches and radially spaced apart from one another by 90 degrees to thus provide four slits at 0.1 inch intervals along the length of the distal portion of the catheter.
Claim 17
Dependent Claim
21 words
The catheter of claim 15 wherein said slits are at an angle of about forty-five degree to a longitudinal sidewall line.
Claim 18
Dependent Claim
15 words
The catheter of claim 15 wherein said slits are parallel to a longitudinal sidewall line.
Claim 19
Dependent Claim
54 words
The catheter of claim 13 or 14 wherein the slits are curved, and wherein the slits are longitudinally spaced apart from one another by 0.2 inches and radially spaced apart from one another by 90 degrees to provide one slit at 0.1 inch intervals along the length of the distal portion of the catheter.
Claim 20
Dependent Claim
12 words
The catheter of claim 6 wherein said catheter is made of nylon.
Claim 21
Dependent Claim
31 words
The catheter of claim 19 and further including an end hole formed at the end of the distal portion said end hole shaped and dimensioned to receive therethrough a guide wire.
Claim 22
Dependent Claim
53 words
The catheter of claim 21 wherein said catheter lumen is tapered at its distal end and wherein an occluding wire and ball are removably receivable in said catheter lumen. Said occluding ball shaped and dimensioned to sit in said tapered distal end to block said end hole and prevent material from exiting therethrough.
Claim 23
Dependent Claim
24 words
The catheter of claim 8 or 9 wherein at least the distal portion of the catheter is made of stainless steel coil or braid.
Claim 24
Dependent Claim
18 words
The catheter of claim 22 and further including means to adjust the tension on the coil or braid.
Claim 25
Dependent Claim
21 words
The catheter of claim 22 and further including a polymer sleeve positioned between the coil or braid and a catheter hub.
Claim 26
Dependent Claim
22 words
The catheter of claim 5 and further comprising sleeve means for selectively blocking said pressure responsive exits to prevent fluid flow therefrom.
Claim 27
Dependent Claim
15 words
The catheter of claim 25 wherein said sleeve means is made of a low-friction polymer.
Claim 28
Dependent Claim
13 words
The catheter of claim 25 wherein said sleeve means is formed of polyolefin.
Claim 29
Dependent Claim
13 words
The catheter of claim 26 wherein said sleeve means is formed of fluoropolymer.
Claim 30
Dependent Claim
24 words
The catheter of claim 25 wherein said sleeve means is shaped and dimensioned to fit over at least a portion of the catheter sidewall.
Claim 31
Dependent Claim
23 words
The catheter of claim 29 wherein said catheter sidewall has markings thereon to indicate the position of said sleeve means on said catheter.
Claim 32
Dependent Claim
32 words
The catheter of claim 8 and further including adjusting means for adjusting the force on said coil to allow said coil to be moved from its compressed state to its non-compressed state.
Claim 33
Dependent Claim
50 words
The catheter of claim 31 wherein said adjusting means includes a tension screw, an adjusting nut, a pre-loaded spring, and a connecting wire, said connecting wire serving to transfer force from said adjusting nut and said pre-loaded spring to said distal coil to control the tension on said distal coil.
Claim 34
Dependent Claim
82 words
The catheter of claim 31 wherein said adjusting means includes a hub body, a compression spring, a platform, a cap, and a connecting wire, said connecting wire being attached to said platform and said coil, said platform abutting said compression spring, and wherein a force is transferred from said compression spring to said distal coil when said hub body is turned and wherein a force is transferred from said coil to said compression spring when fluid pressure is exerted on said coil.
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