Patent EP0079719A1 successfully refreshed from Google Patents.
EP0079719A1
Expired / Lapsed
EP
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Dual lumen subclavian cannula
Assignee: Shiley Inc
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Filing: 1982-11-03
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Granted: —
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Expires: 2002-11-03
Abstract
Abstract A dual lumen subclavian cannula is disclosed for use in hemodialysis where the lumens (7,8) are formed by a septum (6) dividing an essentially circular tube (1) longitudinally. The blood return lumen (8) is closed at its side wall proximal to the point (9). The blood inlet lumen (7) has an open distal end (11) plus openings (12) in the side wall which are proximal to the analogous openings (10) in the blood return lumen (8). A manifold (3,4,5) at the proximal end of the tube (1) separately distributes blood into the return lumen (8) and collects blood from the inlet lumen (7).
Inventors
- 👤 William Edelman
- 👤 Michael Baranowski
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 01:07
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/158; A61M5/1582; A61B; A61B90/00; A61B90/39; A61M25/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M25/003; A61M2025/0031; A61M2025/0037
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
A flexible dual lumen subclavian cannula suitable for semi-permanent use having at its proximal end a manifold for separately collecting fluid from said first lumen and distributing fluid into said second lumen, characterized by having: a flexible tube (1) divided into first (7) and second (8) flow lumens by a longitudinal septum (16); the distal end of the tube wall enclosing said second lumen tapered to a closed blunt point (9) against said septum, and provided with a distal opening by at least one aperture (10) proximal to the tapered section of the tube wall; the distal end of the tube wall enclosing said first lumen extended to a position substantially opposite the proximal end of the tapered section of said second lumen and not closed, to provide a first distal opening (11) for said first lumen; and a second distal opening for said first lumen provided by at least one aperture (12) in the tube wall proximal to said distal opening in said second lumen.
Claim 2
Dependent Claim
166 words
A flexible dual lumen subclavian cannula suitable for semi-permanent use having at its proximal end a manifold for separately collecting fluid from said first lumen and distributing fluid into said second lumen, characterized by having: a flexible tube (1) divided into first (7) and second (8) flow lumens by a longitudinal septum (16); the distal end of the tube wall enclosing said second lumen tapered to a closed blunt point (9) against said septum, and provided with a distal opening by at least one aperture (10) proximal to the tapered section of the tube wall; the distal end of the tube wall enclosing said first lumen extended to a position substantially opposite the proximal end of the tapered section of said second lumen and not closed, to provide a first distal opening (11) for said first lumen; and a second distal opening for said first lumen provided by at least one aperture (12) in the tube wall proximal to said distal opening in said second lumen.
Claim 3
Dependent Claim
24 words
A cannula according to claim 1 where the interior of said second lumen distal of its distal opening is filled with inert plastic (13).
Claim 4
Dependent Claim
43 words
A cannula according to claims 1 or 2 where the open areas provided by said at least one aperture in the tube wall enclosing each of said lumens total for each lumen at least the cross sectional area for flow of that lumen.
Claim 5
Dependent Claim
37 words
A cannula according to claims 1 or 2 where said at least one aperture in the tube walls enclosing each of said channels consists of five holes of diameter approximately equal to one-half the tubing internal diameter.
Claim 6
Dependent Claim
24 words
A cannula according to claims 1 or 2 where said tube (1) and said septum (6) are composed of radio-opaque fluorinated ethylene propylene polymer.
Claim 7
Dependent Claim
14 words
A cannula according to claim 5 where said tube is of circular cross section.
References Cited (Backward Citations)
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Cited
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