Needle tip guard for percutaneous entry needles

• US 20100137815A1
• Filed: 08/01/2009
• Published: 06/03/2010
• Est. Priority Date: 02/27/1996
• Status: Abandoned Application

• Current Assignee: B Braun Melsungen AG (B. Braun Holding GmbH & Co. KG)
• Original Assignee: B Braun Melsungen AG (B. Braun Holding GmbH & Co. KG)
• Inventors: Cohen, Richard, Ohnemus, Randall E., Smith, Craig W., Kuracina, Thomas C., Rollo, David
• Application Number:
  US12/462,299
• Publication Number:
  US 20100137815A1
• Time in Patent Office: Days
• US Class Current: 604/263
• CPC Class Codes: A61B 5/15003 for venous or arterial blood
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150488 Details of construction of shaft
• CPC Class Codes: A61B 5/150496 Details of construction of hub, i.e. element used to attach the double-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/150572 Pierceable protectors, e.g. shields, caps, sleeves or films, e.g. for hygienic purposes
• CPC Class Codes: A61B 5/150641 comprising means to impede repositioning of protection sleeve from covering to uncovering position
• CPC Class Codes: A61B 5/150732 Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube,
• CPC Class Codes: A61B 5/154 Devices using pre-evacuated means
• CPC Class Codes: A61M 2005/2414 from the side
• CPC Class Codes: A61M 2005/3109 Caps sealing the needle bore by use of, e.g. air-hardening adhesive, elastomer or epoxy resin
• CPC Class Codes: A61M 2005/3246 being squeezably deformable for locking or unlocking purposes, e.g. with elliptical cross-section
• CPC Class Codes: A61M 2005/325 Means obstructing the needle passage at distal end of a needle protection sleeve
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/0612 Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
• CPC Class Codes: A61M 25/0625 with a permanent connection to the needle hub, e.g. a guiding rail, a locking mechanism or a guard advancement mechanism
• CPC Class Codes: A61M 5/002 Packages specially adapted therefor, e.g. for syringes or needles, kits for diabetics needle protection, e.g. caps, A61M5/3202; for sharps A61B50/3001
• CPC Class Codes: A61M 5/24 Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic ampoules or carpules A61J1/06
• 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 5/3243 being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel devices for protecting guide needles in combination with catheters A61M25/0612
• CPC Class Codes: A61M 5/3257 : Semi-automatic sleeve extension, i.e. in which triggering of the sleeve extension requires a deliberate action by the user, e.g. manual release of spring-biased extension means
• CPC Class Codes: A61M 5/3273 : freely sliding on needle shaft without connection to syringe or needle
• CPC Class Codes: A61M 5/3275 : being connected to the needle hub or syringe by radially deflectable members, e.g. longitudinal slats, cords or bands
• CPC Class Codes: A61M 5/329 : characterised by features of the needle shaft
• CPC Class Codes: A61M 5/3291 : Shafts with additional lateral openings
• CPC Class Codes: Y10S 128/919 : Syringe, means to protect user
• CPC Class Codes: Y10T 29/49826 : Assembling or joining

Abstract

A needle tip protective device for use with percutaneous entry needles. In one embodiment, the needle tip protective device includes a needle guard slidably mounted on a hypodermic needle, the latter having a needle tip located at the distal end thereof, and a change of profile formed medially there along. The needle guard is movable along the hypodermic needle and engageable with the change in profile formed thereon. The engagement with the change in profile is configured to correspond with the ability of the needle trap to entrap the needle tip once the needle trap has advanced the sufficient distance distally along the hypodermic needle. In further refinements, the needle trap may be biased toward the distal needle tip of the needle.

Claims

1-13. -13. (canceled)

14. A needle protective device comprising:

an elongate needle comprising a shaft having a proximal end and a sharpened distal end and a change in axis comprising a bend formed between the proximal end and the sharpened distal end;

a plastic needle guard mounted and slidable along a portion of the needle between the proximal end and the sharpened distal end;

a separate bushing located within the plastic needle guard, the bushing sized to slide along the needle shaft and functions to stop the plastic needle guard in a protective position to at least substantially circumferentially cover at least a distal-most portion of the needle shaft located distal to the bend, the bushing being engageable with the bend such that the distal advancement of the bushing is stopped at the bend; and

a separate metallic needle tip cover attached to the plastic needle guard that covers the sharpened distal end of the needle substantially coincident with when the bushing engages the bend.

15. The needle protective device of claim 14 wherein the metallic needle tip cover is transitional between a first retracted configuration and a second operative configuration wherein the metallic needle tip cover covers the sharpened distal end of the needle.

16. The needle protective device of claim 15 wherein the metallic needle tip cover is biased against the needle shaft when the metallic needle tip cover is in the first retracted configuration.

17. The needle protective device of claim 14 wherein the needle is selected from the group consisting of an epidural needle, a blood collection needle, a biopsy needle, a Seldinger needle, a Huber needle, an aspirating needle, and a solid stylet.

18. The needle protective device of claim 15 wherein when the metallic needle tip cover transitions from the first retracted configuration to the second operative configuration, the bushing subsequently engages with the change in axis.

19. The needle protective device of claim 15 wherein when the bushing is operative to engage with the change in axis, the metallic needle tip cover subsequently transitions from the first retracted configuration to the second operative configuration.

20. The needle protective device of claim 14 wherein the plastic needle guard is of a plastic molded construction.

21. A composite needle protective device comprising:

a Huber needle comprising a shaft having a proximal end and a sharpened distal end and a change in axis comprising a bend formed between the proximal end and the sharpened distal end;

a plastic needle guard of a plastic molded construction mounted and slidable along a portion of the Huber needle between the proximal end and the sharpened distal end;

a separate bushing located within the plastic needle guard, the bushing sized to slide along the Huber needle shaft and functions to stop the plastic needle guard in a protective position to at least substantially circumferentially cover at least a distal-most portion of the Huber needle shaft located distal to the bend, the bushing being engageable with the bend such that the distal advancement of the bushing is stopped at the bend; and

a separate metallic needle tip cover attached to the plastic needle guard that covers the sharpened distal end of the needle substantially coincident with when the bushing engages the bend.

22. The needle protective device of claim 21 wherein the metallic needle tip cover is transitional between a first retracted configuration and a second operative configuration wherein the metallic needle tip cover covers the sharpened distal end of the Huber needle.

23. The needle protective device of claim 22 wherein the metallic needle tip cover is biased against the Huber needle shaft when the metallic needle tip cover is in the first retracted configuration.

24. The needle protective device of claim 22 wherein when the metallic needle tip cover transitions from the first retracted configuration to the second operative configuration, the bushing subsequently engages with the change in axis.

25. The needle protective device of claim 22 wherein when the bushing is operative to engage with the change in axis, the metallic needle tip cover subsequently transitions from the first retracted configuration to the second operative configuration.