US5800411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter
Assignee: Olympus Corp
•
Filing: 1996-09-06
•
Granted: 1998-09-01
•
Expires: 2016-09-06
Abstract
Abstract A catheter to be used as an injection tube includes a flexible sheath to be inserted into a celom through an insertion channel of an endoscope for injecting a medicinal solution or the like into the celom through the sheath. The sheath includes a distal end portion which has a distal aperture smaller than the inside diameter of the sheath, a frontmost portion rounded with a radius of curvature larger than the thickness of the wall of the sheath, and at least one slit extending to the distal aperture.
Inventors
- 👤 Mamoru Nakada
- 👤 Minoru Shinozuka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:02
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0067; A61M25/0068; A61M25/0074; A61M25/007; A61M25/0075
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
118 words
A catheter comprising a flexible sheath to be inserted into a celom through an insertion channel of an endoscope for injecting liquid such as a medicinal solution into the celom through the flexible sheath, wherein the flexible sheath has an inside diameter and a wall having a thickness and comprises a distal end portion which has a distal aperture having a diameter smaller than the inside diameter of the flexible sheath, a frontmost part of the distal end portion being rounded with a radius of curvature larger than the thickness of the wall of the flexible sheath, and at least one slit extending to the aperture, wherein the at least one slit is covered by an elastic film.
Claim 2
Dependent Claim
118 words
A catheter comprising a flexible sheath to be inserted into a celom through an insertion channel of an endoscope for injecting liquid such as a medicinal solution into the celom through the flexible sheath, wherein the flexible sheath has an inside diameter and a wall having a thickness and comprises a distal end portion which has a distal aperture having a diameter smaller than the inside diameter of the flexible sheath, a frontmost part of the distal end portion being rounded with a radius of curvature larger than the thickness of the wall of the flexible sheath, and at least one slit extending to the aperture, wherein the at least one slit is covered by an elastic film.
Claim 3
Dependent Claim
28 words
The catheter of claim 1, wherein the aperture has a diameter of at least 0.1 mm and at most half of the inside diameter of the flexible sheath.
Claim 4
Dependent Claim
28 words
The catheter of claim 1, wherein the distal end portion has a wall whose thickness is not more than the thickness of the wall of the flexible sheath.
Claim 5
Dependent Claim
22 words
The catheter of claim 1, wherein the at least one slit extends from the aperture to the wall of the flexible sheath.
Claim 6
Dependent Claim
39 words
The catheter of claim 1, wherein the flexible sheath has an outside diameter D, the aperture has a diameter d, and the radius of curvature of the frontmost part of the distal end portion is substantially equal to (D-d)/2.
Claim 7
Dependent Claim
19 words
The catheter of claim 1, wherein the flexible sheath has an outside diameter of 1.5 mm to 2.5 mm.
Claim 8
Dependent Claim
19 words
The catheter of claim 1, wherein the inside diameter of the flexible sheath is 0.7 mm to 1.7 mm.
Claim 9
Dependent Claim
15 words
The catheter of claim 1, wherein the flexible sheath is made of a thermoplastic resin.
Claim 10
Dependent Claim
23 words
The catheter of claim 8, wherein the thermoplastic resin is selected from the group consisting of polytetrafluorethylene (PTFE) and fluorinated ethylene propylene (FEP).
Claim 11
Dependent Claim
15 words
The catheter of claim 1, wherein the number of the slits is at least four.
Claim 12
Dependent Claim
24 words
The catheter of claim 1, wherein the distal end portion of the flexible sheath has an outer surface on which a marker is provided.
Claim 13
Dependent Claim
22 words
The catheter of claim 1, wherein the flexible sheath has a central axis and the aperture is eccentric to the central axis.
Claim 14
Dependent Claim
53 words
The catheter of claim 12, wherein the flexible sheath has an outer surface and an outside diameter and the frontmost part of the flexible sheath extends from the outer surface to the eccentric aperture and rounded with a radius of curvature substantially equal to half of the outside diameter of the flexible sheath.
Claim 15
Dependent Claim
26 words
The catheter of claim 1, wherein the distal end portion of the flexible sheath has an outer surface on which an X-ray untransmissive member is provided.
Claim 16
Dependent Claim
26 words
The catheter of claim 14, wherein the X-ray untransmissive member is made of a material selected from the group consisting of stainless steel, platinum and tungsten.
Claim 17
Dependent Claim
14 words
The catheter of claim 1, wherein the film is made of a thermoplastic resin.
Claim 18
Dependent Claim
19 words
The catheter of claim 16, wherein the thermoplastic resin is selected from the group consisting of polyurethane and silicone.
Claim 19
Dependent Claim
126 words
A catheter comprising a flexible sheath to be inserted into a pancreatic duct or a bile duct through an insertion channel of a duodenal endoscope for injecting a contrast medium into the pancreatic duct or the bile duct through the flexible sheath, wherein the flexible sheath has an inside diameter and a wall having a thickness and comprises a distal end portion which has a distal aperture having a diameter smaller than the inside diameter of the flexible sheath, a frontmost part of the distal end portion being rounded with a radius of curvature larger than the thickness of the wall of the flexible sheath, and at least one slit extending to the aperture, wherein the at least one slit is covered by an elastic film.
Claim 20
Dependent Claim
126 words
A catheter comprising a flexible sheath to be inserted into a pancreatic duct or a bile duct through an insertion channel of a duodenal endoscope for injecting a contrast medium into the pancreatic duct or the bile duct through the flexible sheath, wherein the flexible sheath has an inside diameter and a wall having a thickness and comprises a distal end portion which has a distal aperture having a diameter smaller than the inside diameter of the flexible sheath, a frontmost part of the distal end portion being rounded with a radius of curvature larger than the thickness of the wall of the flexible sheath, and at least one slit extending to the aperture, wherein the at least one slit is covered by an elastic film.
Claim 21
Dependent Claim
28 words
The catheter of claim 18, wherein the aperture has a diameter of at least 0.1 mm and at most half of the inside diameter of the flexible sheath.
Claim 22
Dependent Claim
28 words
The catheter of claim 18, wherein the distal end portion has a wall whose thickness is not more than the thickness of the wall of the flexible sheath.
Claim 23
Dependent Claim
22 words
The catheter of claim 18, wherein the at least one slit extends from the aperture to the wall of the flexible sheath.
Claim 24
Dependent Claim
39 words
The catheter of claim 18, wherein the flexible sheath has an outside diameter D, the aperture has a diameter d, and the radius of curvature of the frontmost part of the distal end portion is substantially equal to (D-d)/2.
Claim 25
Dependent Claim
19 words
The catheter of claim 18, wherein the flexible sheath has an outside diameter of 1.5 mm to 2.5 mm.
Claim 26
Dependent Claim
19 words
The catheter of claim 18, wherein the inside diameter of the flexible sheath is 0.7 mm to 1.7 mm.
Claim 27
Dependent Claim
15 words
The catheter of claim 18, wherein the flexible sheath is made of a thermoplastic resin.
Claim 28
Dependent Claim
23 words
The catheter of claim 25, wherein the thermoplastic resin is selected from the group consisting of polytetrafluorethylene (PTFE) and fluorinated ethylene propylene (FEP).
Claim 29
Dependent Claim
15 words
The catheter of claim 18, wherein the number of the slits is at least four.
Claim 30
Dependent Claim
24 words
The catheter of claim 18, wherein the distal, end portion of the flexible sheath has an outer surface on which a marker is provided.
Claim 31
Dependent Claim
22 words
The catheter of claim 18, wherein the flexible sheath has a central axis and the aperture is eccentric to the central axis.
Claim 32
Dependent Claim
53 words
The catheter of claim 29, wherein the flexible sheath has an outer surface and an outside diameter and the frontmost part of the flexible sheath extends from the outer surface to the eccentric aperture and rounded with a radius of curvature substantially equal to half of the outside diameter of the flexible sheath.
Claim 33
Dependent Claim
26 words
The catheter of claim 18, wherein the distal end portion of the flexible sheath has an outer surface on which an X-ray untransmissive member is provided.
Claim 34
Dependent Claim
26 words
The catheter of claim 31, wherein the X-ray untransmissive member is made of a material selected from the group consisting of stainless steel, platinum and tungsten.
Claim 35
Dependent Claim
14 words
The catheter of claim 18, wherein the film is made of a thermoplastic resin.
Claim 36
Dependent Claim
19 words
The catheter of claim 33, wherein the thermoplastic resin is selected from the group consisting of polyurethane and silicone.
References Cited (Backward Citations)
EP0208787A1
Cited
DE8710340U1
Cited
US5066278A
Cited
EP0547463A1
Cited
FR2707505A1
Cited
US5593412A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |