EP0537136A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Catheters and methods of using such catheters
Assignee: Bard Access Systems Inc
•
Filing: 1987-10-01
•
Granted: —
•
Expires: 2007-10-01
Abstract
Abstract An indwelling catheter tube 30 has a proximal end and a distal end and at least one lumen, the transverse shape of each internal lumen being characterised by an asymmetrical liquid passageway comprising at least one corner so that occlusion of flow is prevented even when the catheter tube is inadvertently kinked.
Inventors
- 👤 Colins J. Nichols
- 👤 Gregory N. Nordgren
- 👤 Harvey Robert Moorehead
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 12:16
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/0102; A61M25/0021; A61M25/0023; A61M25/0026; A61M25/003; A61M25/0032; A61M25/0067; A61M25/0074; A61M25/0075
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
61 words
An indwelling catheter tube having an external surface and comprising a proximal end, a distal end and at least one lumen internally defined by wall means, the transverse shape of each internal lumen being characterised by an asymmetrical liquid passageway comprising at least one corner means whereby kinking, folding and collapsing of a catheter tube will alleviate occlusion of the lumen.
Claim 2
Dependent Claim
62 words
An indwelling catheter tube having an internal surface and comprising a proximal end, and a distal end, and at least one lumen internally defined by wall means, the transverse shape of each internal lumen being characterised by an asymmetrical liquid passageway, comprising at least two corner means whereby kinking, folding and collapsing of the catheter tube will alleviate occlusion of the lumen.
Claim 3
Dependent Claim
14 words
An indwelling catheter tube according to claim 2 which comprises two corner means only.
Claim 4
Dependent Claim
18 words
An indwelling catheter tube according to claim 2 wherein the at least one lumen comprises four corner means.
Claim 5
Dependent Claim
24 words
An indwelling catheter tube according to claim 2 wherein each corner means comprise a wall surface comprising a fillet corner having a small radius.
Claim 6
Dependent Claim
24 words
An indwelling catheter tube according to claim 2 wherein each corner means comprise a wall surface comprising a fillet corner having a large radius.
Claim 7
Dependent Claim
19 words
An indwelling catheter tube according to claim 2 wherein each corner means comprise angle creating linear wall surface means.
Claim 8
Dependent Claim
21 words
An indwelling catheter tube according to claim 2 wherein each corner means comprise an angle created by curved wall surface means.
Claim 9
Dependent Claim
216 words
An indwelling multi-lumen catheter comprising a catheter tube having a distal end portion comprising exterior distal end covering means and wall means at the distal end within the covering means defining at least in part a plurality of internal independently operable lumens, the distal end of each lumen essentially laterally interfacing with the distal end covering means, the sheath means being characterised at each lumen interface by flow control means to accommodate selective influent or effluent liquid flow into or from any selected lumen in respect to a body cavity of a medical patient; the catheter tube further comprising a proximal end portion comprising exterior proximal end covering means terminating in a single hub at the trailing end thereof; the portion of the catheter tube between the distal end covering means and the proximal end covering means being sheathless and comprising separate exposed transversely severable wall means defining each lumen; whereby the distal end portion of the catheter tube is adapted for indwelling placement within the body cavity of said patient, the proximal end is adapted for unitary manipulation to a desired exposed site on the patient, the proximal end portion adapted to be discarded prior to liquid flow after the exposed lumen-defining wall means are severed and each lumen equipped with an independent proximal hub.
Claim 10
Dependent Claim
15 words
A catheter according to claim 9 wherein the flow control means comprise slit valve means.
Claim 11
Independent Claim
212 words
A method of using an indwelling multi-lumen catheter comprising the steps of: providing a catheter tube having a distal end portion comprising exterior distal end covering menas and wall means at the distal end within the covering means defining at least in part a plurality of internal independently operable lumens, the distal end of each lumen essentially laterally interfacing with the distal end covering means, the covering means being characterised at each lumen interface by flow control means, proximal end portion comprising exterior proximal end covering means terminating in a single hub at the trailing end thereof, the portion of the catheter tube between the distal end covering means and the proximal end covering means being sheathless and comprising separate exposed transversely severable wall means defining each lumen; placing the distal end portion of the catheter tube within the body cavity of a medical patient; unitarily manipulating the proximal end of the catheter tube to a desired exposed site on the patient; transversely severing the separate lumen-defining wall means; discarding the severed distal end portion of the catheter tube; attaching a proximal connector to each lumen-defining wall means; selectively causing influent or effluent liquid flow independently along at least one lumen across the associated port means and across the associated proximal connector.
Claim 12
Dependent Claim
35 words
A method according to claim 11 comprising the step of selectively preventing and accommodating liquid flow at each port means across a normally closed three position slit valve placed in the distal end covering means.
Claim 13
Dependent Claim
37 words
A method according to claim 11, wherein the unitary manipulating step comprises trocar displacement of the proximal end portion of the catheter tube subcutaneously from one exposed patient body site to a second exposed patient body site.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.