US3877429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter placement device
Assignee: Individual
•
Filing: 1973-11-30
•
Granted: 1975-04-15
•
Expires: 1993-11-30
Abstract
Abstract The invention is a flexible cannula for introducing a catheter into a vein during a surgical cutdown procedure. The cannula includes a hollow plastic member having aa cylindrical portion and an integral conical portion with a truncated tip and two pairs of longitudinal slits one of which pairs extends nearly to the truncated tip so that the conical portion is split open when a catheter is moved through the cannula toward its tip.
Inventors
- 👤 David L Rasumoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:15
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M25/0668
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
104 words
A catheter placement device for introducing a catheter into a vein of a patient during a surgical cutdown procedure, comprising: a hollow plastic member including a conical portion having a base and a truncated distal end, said conical portion also including a first set of longitudinally disposed slits extending from said base axially along said conical portion to a point substantially adjacent said distal end but spaced inwardly therefrom and adapted to split thereat when a catheter is moved through said hollow plastic member toward said distal end the unsplit portion of said distal end initially retaining rigidity enough to dilate a collapsed vein.
Claim 2
Dependent Claim
104 words
A catheter placement device for introducing a catheter into a vein of a patient during a surgical cutdown procedure, comprising: a hollow plastic member including a conical portion having a base and a truncated distal end, said conical portion also including a first set of longitudinally disposed slits extending from said base axially along said conical portion to a point substantially adjacent said distal end but spaced inwardly therefrom and adapted to split thereat when a catheter is moved through said hollow plastic member toward said distal end the unsplit portion of said distal end initially retaining rigidity enough to dilate a collapsed vein.
Claim 3
Dependent Claim
44 words
The catheter placement device according to claim 1, also comprising a second set of slits in said conical portion extending from said base to a point intermediate said distal end, and wherein each of said sets of slits include two essentially oppositely disposed slits.
Claim 4
Dependent Claim
26 words
The catheter placement device according to claim 1 wherein said hollow, plastic member has a cylindrical portion coaxially contiguous to said base of said conical portion.
Claim 5
Dependent Claim
28 words
The catheter placement device according to claim 3 wherein the taper of said conical portion relative to said cylindrical portion is in the range of 10* to 20*.
Claim 6
Dependent Claim
47 words
The catheter placement device as in claim 4 wherein said first set of slitS includes two slits, and a second set of slits includes two longitudinally disposed slits along said conical portion extending from said base to a point intermediate to said distal end and said base.
Claim 7
Dependent Claim
23 words
The catheter placement device according to claim 5, wherein said device includes a tab extending from the open end of said cylindrical portion.
Claim 8
Dependent Claim
37 words
The catheter placement device according to claim 6 wherein one of said first set of slits extends from the base of said conical portion to the open end of said cylindrical portion of said hollow, plastic member.
Claim 9
Dependent Claim
35 words
The catheter placement device according to claim 1, wherein said hollow plastic member is of polyethylene plastic material in tubing form, said conical portion being a heated and drawn portion forming a gradual longitudinal taper.
References Cited (Backward Citations)
US668879A
Cited
US2269963A
Cited
US2512569A
Cited
US2842133A
Cited
US3550591A
Cited
US3788318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |