DETACHABLE, HOLLOW GUIDE NEEDLE

• US 3,651,807 A
• Filed: 02/19/1970
• Issued: 03/28/1972
• Est. Priority Date: 02/19/1970
• Status: Expired due to Term

• Current Assignee: James A. Huggins
• Original Assignee: James A. Huggins
• Inventors: Huggins, James A.
• Primary Examiner(s): Gaudet, Richard A.
• Assistant Examiner(s): McGowan, J. C.
• Application Number:
  US05/012,649
• Time in Patent Office: 768 Days
• Field of Search: 128/214,214.2,214.4,215,221,347,348,346,349 24/137,255,255.1
• US Class Current: 604/161
• CPC Class Codes: A61M 25/065 Guide needles
• CPC Class Codes: A61M 25/0668 splittable, tear apart

Abstract

A detachable hollow guide needle for piercing body portions, such as tissues, muscles, veins, to locate a flexible catheter tube in the selected body portion for withdrawing or introducing fluids relative thereto, and which includes a longitudinally split tube with the edges thereof normally adjacent one another to substantially enclose an included catheter tube, the tube having a sharpened end configuration for body insertion and wing members adjacent the opposite end diverging from adjacent edges of the split tube for pressure application to spread the tube edges a distance sufficient to remove the same from the body inserted catheter initially associated therewith.

Claims

1. A thin, one-piece hollow guide needle for insertion into a body porTion and locating a flexible tube in the body portion for withdrawing or introducing fluid relative thereto;

and comprising an elongate longitudinally split tubular member with the longitudinal edges thereof normally in close adjacency forming a substantially circumferentially closed tube for receiving therein a flexible cather tube and having a sharpened end configuration for body insertion locating the catheter tube therein, and wings adjacent the opposite end of the tubular member which are folded from adjacent said longitudinal tube edges to a diverging position extending in a direction away from the side of said needle opposite said split to move the wings toward one another when the guide needle is withdrawn along the catheter tube from the body portion, said wings each being provided with reinforcing ribs to make them relatively rigid, said tubular member being provided with longitudinal recess means extending from adjacent the opposite ends thereof and disposed diametrically opposite to the adjacent longitudinal tube edges to concentrate hinged opening movement of the tubular member along the recess means, said recess tending to close up when said wings are moved toward one another, whereby the adjacent edges of the split tube will be separated sufficiently to permit complete removal of the guide needle from association with the body-inserted catheter tube.

2. A detachable hollow guide needle as claimed in claim 1, wherein the recess means comprises a slot which leaves end portions of the tubular member as the hinge areas during opening and closing thereof.

3. A detachable hollow guide needle as claimed in claim 2, wherein there is provided a spacer clip detachably engaging the wings to prevent inadvertent opening or closing movements thereof until removed from body insertion.