US4619644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clinical catheterization technique and apparatus for performing same
Assignee: Individual
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Filing: 1984-09-06
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Granted: 1986-10-28
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Expires: 2004-09-06
Abstract
Abstract An improved clinical techique for central venous catheterization and apparatus for performing same. The catheterization apparatus includes a small gauge hollow steel needle having a long plastic catheter introducer covering all but the very tip of the needle. The needle positions the plastic introducer into the vein whereupon the needle is removed. Next, a guide wire is inserted into the introducer and into the vein. After the guide wire is in place, the introducer is peeled away from the guide wire, and the guide wire and plastic catheter are threaded into the central venous system. Once the catheter is in place, the guide wire is removed, the catheter is attached to an intravenous unit and the catheter is sutured to the skin.
Inventors
- 👤 Van E. Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:02
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0662; A61M25/0668
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
A catheterization techinque for use in rapid catheterization of a subject, said technique comprising the steps of: (a) locating and preparing an insertion site; (b) inserting into said site a needle having a shaft portion, a tip portion, and a base portion, said shaft portion being enclosed from proximate said base portion to proximate said tip portion within a hollow cylindrical introducer having a generally planar end adjacent said base portion and a lengthwise slit; (c) pushing said needle and said introducer into said subject to a desired location; (d) withdrawing said needle from said introducer; (e) temporarily covering said planar end of said introducer to prevent the ingress of air; (f) passing a guide wire having a catheter mounted thereon through said introducer into said subject; (g) withdrawing said introducer from said location and said site; (h) removing said introducer from said wire at said lengthwise slit; (i) threading a catheter positioned about said wire into said subject to a desired location; (j) withdrawing said wire from said catheter.
Claim 2
Dependent Claim
170 words
A catheterization techinque for use in rapid catheterization of a subject, said technique comprising the steps of: (a) locating and preparing an insertion site; (b) inserting into said site a needle having a shaft portion, a tip portion, and a base portion, said shaft portion being enclosed from proximate said base portion to proximate said tip portion within a hollow cylindrical introducer having a generally planar end adjacent said base portion and a lengthwise slit; (c) pushing said needle and said introducer into said subject to a desired location; (d) withdrawing said needle from said introducer; (e) temporarily covering said planar end of said introducer to prevent the ingress of air; (f) passing a guide wire having a catheter mounted thereon through said introducer into said subject; (g) withdrawing said introducer from said location and said site; (h) removing said introducer from said wire at said lengthwise slit; (i) threading a catheter positioned about said wire into said subject to a desired location; (j) withdrawing said wire from said catheter.
Claim 3
Dependent Claim
78 words
The improved catheterization technique of claim 1 further comprising the following steps: (a) initially attaching a syringe having a plunger to said base portion of said hypodermic needle; (b) withdrawing said plunger from said syringe as said needle and introducer are inserted into said site toward said location; (c) determining arrival of said needle and introducer at said desired location by the accumulation of fluid in said syringe, said fluid being found in large quantities at said location.
Claim 4
Dependent Claim
24 words
The improved catheterization technique of claim 1, wherein said wire is initially positioned in said catheter prior to passing said wire through said introducer.
Claim 5
Dependent Claim
38 words
The improved catheterization technique of claim 1, wherein said wire has a greater length than said catheter wherein said introducer may be withdrawn from said location and said site and removed from said wire without disturbing said 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) | 1989-10-27 | 1990-04-28 | 1990-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-27 | 1994-04-28 | 1994-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-27 | 1998-04-28 | 1998-10-28 | $7700.00 | Window Closed / Lapsed |