CATHETER INSERTION DEVICE

• US 3,827,434 A
• Filed: 06/21/1972
• Issued: 08/06/1974
• Est. Priority Date: 06/21/1972
• Status: Expired due to Term

• Current Assignee: John A. Gula, Thomas C. Thompson
• Original Assignee: John A. Gula, Thomas C. Thompson
• Inventors: Thompson, Thomas C., Gula, John A.
• Primary Examiner(s): Truluck, Dalton L.
• Application Number:
  US05/264,888
• Time in Patent Office: 776 Days
• Field of Search: 128/214R,214.4,221,348,35R,DIG.16
• US Class Current: 604/160
• CPC Class Codes: A61M 25/065 Guide needles

Abstract

A catheter insertion device having a needle assembly comprising a hollow slotted needle with a needle hub affixed to its proximal end and a catheter assembly comprising a flexible catheter having a sealing segment with an enlarged outside diameter to prevent bleedback and a hollow catheter hub secured to its proximal end, the two assemblies being releasably locked together to prevent relative longitudinal movement of the catheter in the needle, the locking being releasable without relative longitudinal movement of the catheter and needle. The catheter is provided with a wire stylet having an enlarged rounded distal tip.

Claims

1. A catheter insertion device comprising:

a hollow slotted needle;

a needle hub secured to the needle and having a pair of axially spaced, oppositely facing locking surfaces;

a catheter lying in the needle; and

a catheter hub secured to the proximal portion of the catheter having a pair of oppositely facing complimentary locking surfaces axially spaced substantially equally to the spacing of the needle hub locking surfaces and engaging said needle hub locking surfaces to prevent relative longitudinal movement of the catheter and needle, said catheter hub being movable by relative lateral movement from said engagement to a second position, in which said locking surfaces are not engaged.

2. The device of claim 1, in which the needle hub includes a flat base extending proximally of the needle, and said pair of needle hub locking surfaces comprise spaced facing shoulders upstanding from said base.

3. A catheter insertion device comprising:

a hollow slotted needle having a pointed distal end and a proximal end;

a needle hub secured to the proximal end of the needle and having a distally facing shoulder formed thereon spaced from the proximal end of the needle;

a catheter lying in the needle; and

a catheter hub secured to the proximal portion of the catheter having a complimentary proximally facing shoulder formed thereon and spaced from the proximal end of the needle an amount substantially equal to the spacing of the needle hub shoulder from the proximal end of the needle and engaging said needle hub shoulder to prevent relative proximal longitudinal movement of the catheter with respect to the needle, said catheter hub being movable by relative lateral movement from said engagement to a second position, in which said shoulders are not engaged.

4. A catheter insertion device comprising:

a hollow slotted needle having a pointed distal end;

a needle hub secured to the proximal end of the needle and having a base for releasably receiving a catheter hub;

a pair of axially spaced facing shoulders on said base for receiving a catheter hub therebetween;

a catheter lying in the needle; and

a catheter hub extending from the proximal end of the catheter and releasably held between said spaced facing shoulders on the needle hub to prevent longitudinal movement of the catheter with respect to the needle.