§
Luxuse
Patent Intelligence
Sign In
← Back to Patent Explorer
US4668221A Expired / Lapsed US ⏱️ 0.0 years remaining

Assembly of stylet and catheter

Assignee: Luther Medical Products Inc
•
Filing: 1985-06-22
•
Granted: 1987-05-26
•
Expires: 2005-06-22
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract A grooved stylet having a puncture point aligned with the stylet axis is mounted through a catheter to form an assembly. The aligned puncture point enables more accurate piercing of a vein, and reduces the possibility of double piercing the vein. The stylet near its proximal end is provided with a circular shoulder which abuts the proximal end of the catheter, and the catheter end is positioned on the stylet so that only the stylet puncture point projects beyond the catheter. The catheter is constructed of a hydrophilic polymer which expands away from the stylet and permits the stylet to be withdrawn from the puncture site, leaving the catheter in place in the vein. If desired, a plurality of bores may be provided in the catheter for separate attachment to different I.V. solutions; this enables various solutions to be fed at different rates to the patient through a single I.V. puncture site.

Inventors

  • 👤 Ronald B. Luther

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-22 19:04
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/01; A61M25/06; A61M25/0606; A61M25/065; A61M2025/0656; A61M25/0662; A61M2025/0687

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 137 words
An assembly for piercing a vein, artery, organ, and the like, comprising: a. a needle defining an outer surface, distal and proximal ends, and a bevel portion including a curved distal area; b. a puncture tip formed at the proximal end of the needle; c. a catheter comprising a hydrophilic polymer disposed over the needle, the catheter defining an inner surface, a distal end, and a proximal end in contact with, and occluding the curved distal area, the inner surface being in close contact with the outer surface of the needle, whereby, the catheter and needle are enabled to enter a puncture site with reduced `coring` and slippage, and upon contact with liquid in the puncture site, the catheter will expand and enable the needle to be withdrawn, leaving the catheter in place in the puncture site.
Claim 2
Dependent Claim 137 words
An assembly for piercing a vein, artery, organ, and the like, comprising: a. a needle defining an outer surface, distal and proximal ends, and a bevel portion including a curved distal area; b. a puncture tip formed at the proximal end of the needle; c. a catheter comprising a hydrophilic polymer disposed over the needle, the catheter defining an inner surface, a distal end, and a proximal end in contact with, and occluding the curved distal area, the inner surface being in close contact with the outer surface of the needle, whereby, the catheter and needle are enabled to enter a puncture site with reduced `coring` and slippage, and upon contact with liquid in the puncture site, the catheter will expand and enable the needle to be withdrawn, leaving the catheter in place in the puncture site.
Claim 3
Dependent Claim 22 words
The assembly of claim 1, in which the catheter is shrink fitted over the distal area and outer surface of the needle.
Claim 4
Dependent Claim 20 words
The assembly of claim 1, in which the catheter provides a sidewall and a plurality of I.V. bores defined therein.
Claim 5
Dependent Claim 30 words
The assembly of claim 1, in which a time release medication is incorporated into the catheter, and the medication is adapted to be leached out by passage of I.V. fluid.
Claim 6
Dependent Claim 19 words
The assembly of claim 1, in which the catheter provides a hardness of less than about 70 SHORE A.

References Cited (Backward Citations)

US3063451A Cited
US3598127A Cited
US3566874A Cited
US4183884A Cited
US3995623A Cited
US4072146A Cited
US4392848A Cited
US4479795A Cited
US4381380A Cited
US4406656A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1990-05-25 1990-11-24 1991-05-26 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1994-05-25 1994-11-24 1995-05-26 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1998-05-25 1998-11-24 1999-05-26 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag