US3867945A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter stylets
Assignee: Individual
•
Filing: 1973-05-14
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Granted: 1975-02-25
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Expires: 1993-05-14
Abstract
Abstract The present invention relates to a new adjunct to the insertion of a urethral catheter. It is a catheter stiffener and former made of a plastic rod which has the properties of being a flexible, resilient member capable of properly stiffening a urethral catheter or the like while also being sufficiently compliant to pre-shaping into various and multiple curvatures to facilitate insertion into a body cavity.
Inventors
- 👤 Wendell M Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:23
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0021; A61M25/0041; A61M25/01; A61M25/09; A61M25/09016; A61M25/09025; A61M25/10; A61M25/0043; A61M2025/0063; A61M25/0017
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
191 words
An improvement for use in combination with urethral catheters of the type having a drainage lumen and a reduced diameter inflation lumen disposed in parallel through the length thereof, a proximal end for insertion in the urinary bladder, and a distal end including an enlarged diameter drainage outlet communicating with the drainage lumen and an inflation control outlet communicating with said inflation lumen, the improvement consisting of a stiffener and former device comprising: rod means of uniform cross-sectional configuration and reduced length relative to said drainage lumen and extending from proximal to distal ends and having a diameter which is substantially less than that of said drainage lumen for insertion therein throughout the length thereof, said proximal end being formed with an optimal curvature; a handle portion secured to the distal end of said rod means, said handle portion being formed with uniform cross-section slightly larger than said drainage outlet; whereby said rod means may be inserted throughout the entire length of said drainage lumen with said handle means tightly received within the drainage outlet of said urethral catheter to stiffen the catheter while reducing its overall circumference for urethral insertion.
Claim 2
Dependent Claim
191 words
An improvement for use in combination with urethral catheters of the type having a drainage lumen and a reduced diameter inflation lumen disposed in parallel through the length thereof, a proximal end for insertion in the urinary bladder, and a distal end including an enlarged diameter drainage outlet communicating with the drainage lumen and an inflation control outlet communicating with said inflation lumen, the improvement consisting of a stiffener and former device comprising: rod means of uniform cross-sectional configuration and reduced length relative to said drainage lumen and extending from proximal to distal ends and having a diameter which is substantially less than that of said drainage lumen for insertion therein throughout the length thereof, said proximal end being formed with an optimal curvature; a handle portion secured to the distal end of said rod means, said handle portion being formed with uniform cross-section slightly larger than said drainage outlet; whereby said rod means may be inserted throughout the entire length of said drainage lumen with said handle means tightly received within the drainage outlet of said urethral catheter to stiffen the catheter while reducing its overall circumference for urethral insertion.
Claim 3
Dependent Claim
35 words
The improvement as set forth in claim 1 which is further characterized in that: said rod means proximal end curvature is formed as two substantially equal angular bends subtending an arc defining said optimal curvature.
Claim 4
Dependent Claim
27 words
The improvement as set forth in claim 1 which is further characterized in that: said rod means and said handle means are formed from resilient plastic material.
Claim 5
Dependent Claim
19 words
The improvement as set forth in claim 3 which is further characterized in that: said plastic material is nylon.
Claim 6
Dependent Claim
32 words
The improvement as set forth in claim 3 which is further characterized in that: said rod means and said handle means are unitarily formed as uniform, round elements having pre-determined respective diameters.
Claim 7
Dependent Claim
35 words
The improvement as set forth in claim 5 which is further characterized in that: said rod means has a diameter of approximately 1/16 inch and said handle means has a diameter of approximately three-eights inch.
Claim 8
Dependent Claim
26 words
The improvement as set forth in claim 6 which is further characterized in that: said rod means and said handle means are unitarily formed from nylon.
Claim 9
Dependent Claim
21 words
The improvement as set forth in claim 1 wherein: said urethral catheter is the type known as the Foley urethral catheter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |