Patent EP0804936A2 successfully refreshed from Google Patents.
EP0804936A2
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EP
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A medical device for fluid delivery
Assignee: Cook Inc
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Filing: 1997-04-22
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Granted: —
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Expires: 2017-04-22
Abstract
Abstract A method for predetermining the controlled and uniform discharge rate of a fluid from a single lumen tubular body having passageways radially extending through the wall of the tubular body has been developed and is described. The method involves predetermining such parameters as the transverse cross-sectional areas of the passageways extending through the wall of the tubular body, the spacing of the passageways, the pressure at each of the passageways, and the rate of flow at each of the passageways. One specific preferred application of such a tubular body is an infusion catheter for delivering various fluids to designated areas of the body for either a therapeutic treatment and/or diagnostic purposes. For example, such a catheter may be adapted to deliver controlled and uniform quantities of thrombolytic agents, chemotherapeutic agents as well as such diagnostic agents as fluorescent dies and radioactive agents.
Inventors
- 👤 Joseph F. Ely
- 👤 Leo Rothbarth
- 👤 Frank J. Miller
- 👤 David St. John
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 21:29
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/007
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A single lumen medical device comprising an elongated tubular body with proximal and distal ends, means for permitting fluid to be supplied to the body at or adjacent to the proximal end, and a plurality of ports extending through the sidewall of the body, wherein the cross sectional areas of the ports increases in size as the distance of respective ports from the proximal end also increases in size.
Claim 2
Dependent Claim
129 words
A single lumen medical device, comprising: a) an elongated tubular body having proximal and distal ends; (b) means at the proximal end of the tubular body for permitting fluid to enter into the lumen, and (c) a plurality of longitudinally spaced fluid passageways which extend through the sidewall of the elongated tubular body over a length or section of the sidewall, wherein at least one of the spacing of the passageways along the tubular body, the fluid flow rate out of the tubular body or the pressure of the fluid in the tubular body at each passageway is predetermined; and the transverse cross-sectional area or areas of the passageways and/or the distances between the passageways are precisely predetermined to control the rate of discharge of fluid from the passageways.
Claim 3
Dependent Claim
154 words
A medical device comprising an elongated tubular body, means adjacent the proximal end thereof to supply fluid to the body, and passageways through the wall of the body, wherein the transverse cross-sectional area of each passageway is determined according the the following formula: D i = 3840 µ Q i π P i - P amb 1/3 wherein D i is the diameter of each i th passageway, Q i is the constant rate of flow of fluid discharged out of each passageway, µ is the viscosity of the fluid directed into the proximal end of the tubular body, P amb is the pressure outside the tubular body and P i is the pressure at each i th passageway and wherein the spacing of the i th passageways is set at a constant value, or according to an equivalent formula adapted to compensate for unequal spacing between passageways, or to compensate for non-circular passageways.
Claim 4
Dependent Claim
22 words
The device according to claim 1 or 2, or 3, wherein said fluid is either a therapeutic agent, or a diagnostic agent.
Claim 5
Dependent Claim
48 words
The device according to claim 1 wherein the transverse cross-sectional shape of the fluid passageways is cylindrical, or conical, and/or the passageways are spiraled 90° along the length of the tubular body, or at least two passageways are located in a single cross-sectional plane of the tubular body.
Claim 6
Dependent Claim
35 words
The device according to claim 1,2, or 3, wherein the tubular body is segmented with respect to different fluid discharge rates, and wherein the discharge from the passageways within each segment is controlled and uniform.
Claim 7
Dependent Claim
58 words
The device according to claim 1,2 or 3, wherein said tubular body is of flexible material and wherein the distal tip of the tubular body is radiopaque and a radiopaque band is positioned at the proximal terminus of the fluid passageways in order to mark the boundaries of the section of the medical device containing said fluid passageways.
Claim 8
Dependent Claim
23 words
The device according to claim 7, wherein said flexible material is nylon and said proximal radiopaque band is comprised of Pt and Ir.
Claim 9
Dependent Claim
65 words
The device according to claim 1, 2 or 3, wherein the device is designed so that the flow of the fluid within the lumen of the tubular body is laminar, and/or wherein the wall thickness of the tubular body varies along the length of the tubular body and the exterior wall of the catheter comprises a hydrophilic coating, and/or the device contains a guide wire.
References Cited (Backward Citations)
No citation records indexed.
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