Needle for bloodless IV

• US 8,182,448 B2
• Filed: 02/23/2010
• Issued: 05/22/2012
• Est. Priority Date: 12/27/2004
• Status: Active Grant

• Current Assignee: Hoyt Frenzel, Michael Emmert
• Original Assignee: Hoyt Frenzel, Michael Emmert
• Inventors: Emmert, Michael, Frenzel, Hoyt
• Primary Examiner(s): Lucchesi, Nicholas
• Assistant Examiner(s): BERDICHEVSKY, AARTI
• Application Number:
  US12/710,557
• Publication Number:
  US 20100217195A1
• Time in Patent Office: 819 Days
• Field of Search: 604/264, 604/272, 604/273, 604/164.08, 604/167.01, 604/167.02, 604/167.03, 604/167.04
• US Class Current: 604/167.02
• CPC Class Codes: A61M 2025/0018 having a plug, e.g. an inflatable plug for closing catheter lumens
• CPC Class Codes: A61M 2025/0266 using pads, patches, tapes or the like
• CPC Class Codes: A61M 25/0097 characterised by the hub connectors A61M39/10
• CPC Class Codes: A61M 25/02 Holding devices, e.g. on the body
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/0618 having means for protecting only the distal tip of the needle, e.g. a needle guard
• CPC Class Codes: A61M 25/0631 having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle
• CPC Class Codes: A61M 25/0643 Devices having a blunt needle tip, e.g. due to an additional inner component
• CPC Class Codes: A61M 25/0693 Flashback chambers

Abstract

An intravenous catheter system having a retractable needle system and a body system is disclosed. The retractable needle system includes a housing, a needle, a docking feature, and an optional anti-shearing mechanism. The body system includes a body, at least one hub, a catheter connector, at least one plug, a plug recoil mechanism, a locking mechanism, a flash chamber, and a flash window.

Claims

1. A retractable needle for use with an intravenous catheter having a body proximal to a catheter, a housing distal from the catheter, and a plug separating the housing and the body, the needle comprising:

a hollow full diameter portion that extends through the catheter adjacent the body;

a flat portion that extends from the housing, through a through hole in the plug, and extends into the body, the diameter of the flat portion being less than that of the full diameter portion;

a transitional portion located between the full diameter portion and the flat portion configured to interface with the plug to gradually transfer compressive forces upon retraction of the needle from the catheter; and

a flash hole disposed in the full diameter portion of the needle, the flash hole being aligned with a flash window in the intravenous catheter, the flash hole shaped and located such that blood is shot from the flash hole toward the flash window for detection of blood;

wherein the flat portion is selectively configured to generate less compressive force on the plug than the full diameter portion and the transitional portion while the retractable needle is in an extended position.

2. The needle according to claim 1, wherein the transitional portion is tapered.

3. The needle according to claim 1, wherein the transitional portion is abrupt.

4. The needle according to claim 1, wherein the transitional portion is configured such that the full diameter portion and the flat portion are offset from each other.

5. The needle according to claim 1, wherein the transitional portion is configured such that the full diameter portion and the flat portion are coaxial with each other.