Trap in barrel one handed retracted intervenous catheter device

• US 5,129,884 A
• Filed: 08/17/1990
• Issued: 07/14/1992
• Est. Priority Date: 01/16/1990
• Status: Expired due to Term

• Current Assignee: Dynovation Medical Devices (Dynovation Medical Incorporated)
• Original Assignee: Edward D. Dysarz
• Inventors: Dysarz, Edward D.
• Primary Examiner(s): YASKO JR, JOHN D
• Application Number:
  US07/569,089
• Time in Patent Office: 697 Days
• Field of Search: 604/195, 604/263, 604/158, 604/159, 604/162, 604/163, 604/164, 604/198, 604/110, 604/187
• US Class Current: 604/164.08
• CPC Class Codes: A61M 2005/3224 Means to disalign the needle tip and syringe nozzle
• CPC Class Codes: A61M 2005/3235 triggered by radial deflection of the anchoring parts between needle mount and syringe barrel or needle housing, e.g. spreading of needle mount retaining hooks having slanted surfaces by engagement with correspondingly shaped surfaces on the piston at the end of an injection stroke
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/0631 having means for fully covering the needle after its withdrawal, e.g. needle being withdrawn inside the handle or a cover being advanced over the needle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 5/3202 Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: A61M 5/3232 Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means

Abstract

An intervenous catheter device having a needle cannula fixed to a slidable piston. The slidable piston is held within the elongated hollow barrel of said intervenous catheter device by a compressed spring and a latch means. When said latch means is disengaged with said slidable piston fixed to said needle cannula, said slidable piston and said needle cannula are thrust into said elongated hollow barrel of said intervenous catheter device by said spring, said spring further holds said needle cannula fixed to said slidable piston within said elongated hollow barrel and is further prevented from being pushed out of said elongated hollow barrel by a rim in said elongated hollow barrel thus preventing any accidental injection of bacteria, virus or other undesirable material into others. The disengagement of said latch means with said slidable piston is accomplished with only one and the same hand that is used to inject the needle cannula into a body or into a vein inside of said body.

Claims

1. What is claimed as invention is:

an intervenous catheter device held by fingers and thumb for inserting a needle cannula and a catheter into a body and withdrawing said needle cannula from said body comprising;

an elongated hollow barrel having a first end and a second end and having an inner surface and an outer surface and further having a longitudinal axis in the center of the said elongated hollow barrel, parallel in most part of the said inner surface and said outer surface of the said elongated hollow barrel and further extending from said first end to said second end of said elongated hollow barrel;

a barrel flange fixed near to said first end of said elongated hollow barrel, said barrel flange further including a needle cannula tunnel formed in said barrel flange to allow said needle cannula to extend past said barrel flange;

a slidable piston inside of said elongated hollow barrel, said slidable piston having a first end and a second end and said first end of said slidable piston is nearer said first end of said elongated hollow barrel;

a soft catheter, said soft catheter having a first end and a second end, said second end is fixed to said first end of said elongated hollow barrel, said soft catheter further has a cannula extending from said first end of said soft catheter to said second end of said soft catheter;

a soft catheter fitting fixing said soft catheter to said elongated hollow barrel;

a needle cannula having a first end a second end, said first end of said needle cannula extends past said first end of said elongated hollow barrel and said second end of said needle cannula is fixed to said first end of said slidable piston, said needle cannula is disposed within said cannula of said soft catheter and said first end of said needle cannula extends past said first end of said soft catheter;

a spring means having a first end and a second end, said first end of said spring means is integral with said barrel flange of said elongated hollow barrel and said second end of said spring means is integral with said slidable piston, and spring means is further compressed between said barrel flange of said elongated hollow barrel and said slidable piston;

at least one piston notch formed into said slidable piston, said piston notch is near perpendicular to said longitudinal axis of said elongated hollow barrel;

a tunnel, said tunnel is formed inside of the said slidable piston, said tunnel is fixed to the needle cannula to allow fluid or blood to flow through the said needle cannula and into and through said tunnel formed in said slidable piston;

a needle cannula tunnel in said barrel flange;

at least one latch means for engaging and locking said slidable piston to said elongated hollow barrel and for disengaging said slidable piston and releasing said slidable piston from said elongated hollow barrel wherein said slidable piston is no longer restrained and said spring pushes said slidable piston and said needle cannula in the direction of the second end of said elongated hollow barrel until the said needle cannula is past the said barrel flange of the elongated hollow barrel, thus enclosing said needle cannula in said elongated hollow barrel and said barrel flange.

2. The intervenous catheter device of claim 1, wherein said slidable piston has a slope on the second end of said slidable piston.

3. The intervenous catheter device of claim 1, wherein said elongated hollow barrel has a cap on the second end, said cap to prevent said slidable piston and said needle cannula from being removed unintentionally.

4. The intervenous catheter device of claim 3, wherein when said slidable piston and said needle cannula are retracted into said elongated hollow barrel, and wherein said slope at said second end of said slidable piston will push against the said cap at said second end of said elongated hollow barrel further causing said slidable piston and said needle cannula to slope inside of said elongated hollow barrel.

5. The intervenous catheter device of claim 3, wherein said soft catheter will remain in said body or vein or artery after said needle cannula has been removed from said body or vein or artery

6. The intervenous catheter of claim 1 wherein said elongated hollow barrel may be disengaged with said soft catheter fitting.

7. The intervenous catheter device of claim 1 wherein said soft catheter and said soft catheter fitting may be attached to other suitable devices.