Puncturing needle cartridge and puncturing instrument

• US 9,486,166 B2
• Filed: 04/05/2013
• Issued: 11/08/2016
• Est. Priority Date: 05/18/2012
• Status: Active Grant

• Current Assignee: PHC Holdings Corporation
• Original Assignee: Panasonic Healthcare Holdings Co., Ltd.
• Inventors: Nagao, Akio
• Primary Examiner(s): MILES, JONATHAN WADE
• Assistant Examiner(s): MILES, JONATHAN WADE
• Application Number:
  US14/401,983
• Publication Number:
  US 20150142037A1
• Time in Patent Office: 1,313 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/1411 by percutaneous method, e.g. by lancet
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150389 Hollow piercing elements, e.g. canulas, needles, for piercing the skin
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/150549 Protectors removed by rotational movement, e.g. torsion or screwing
• CPC Class Codes: A61B 5/150641 comprising means to impede repositioning of protection sleeve from covering to uncovering position
• CPC Class Codes: A61B 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15117 comprising biased elements, resilient elements or a spring, e.g. a helical spring, leaf spring, or elastic strap
• CPC Class Codes: A61B 5/15186 Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
• CPC Class Codes: A61B 5/15194 fully automatically retracted, i.e. the retraction does not require a deliberate action by the user, e.g. by terminating the contact with the patient's skin

Abstract

A puncture needle cartridge (2) comprises: a columnar lancet body (6) having a puncture needle on the front end side and a puncture instrument mount (5) on the rear end side; a protective cap (13) covering the puncture needle and having a shape extending toward the front end; a skin contact part (10) placed in front of the tip of the puncture needle, having a planar shape perpendicular to the puncture needle, and formed with a through hole to put the protective cap (13) through; an elongate plate-like extension (9) extending from the skin contact part (10) toward the rear end; and an elastic object (8) for coupling the extension (9) to the lancet body (6) and making the tip of the puncture needle be biased to be located in the rear end side behind the skin contact part (10).

Claims

1. A puncture instrument comprising:

a puncture needle cartridge comprising;

a columnar lancet body having a puncture needle on a front end side thereof and a puncture instrument mount on a rear end side thereof;

a protective cap covering the puncture needle;

a skin contact part positioned in front of a tip of the puncture needle, having a planar shape perpendicular to the puncture needle, and formed with a through hole to put the protective cap through;

an elongate extension extending from the skin contact part toward a rear end of the puncture needle cartridge;

an elastic object for coupling the elongate extension to the columnar lancet body and biasing the tip of the puncture needle toward the rear end side of the columnar lancet body behind the skin contact part;

a holder into which the puncture instrument mount is inserted;

a biasing object for accumulating biasing force against the columnar lancet body in a state in which the puncture needle cartridge is held by the holder; and

a puncture operation part for releasing the biasing force of the biasing object,

wherein a rear portion of the elongate extension is deformable toward the columnar lancet body,

wherein a space is defined between the columnar lancet body and a bent portion of the elastic object which bends convexly toward the columnar lancet body, and

wherein the columnar lancet body, the elastic object, the elongate extension, the skin contact part, and the protective cap are integrally formed of plastic.

2. The puncture instrument according to claim 1, wherein:

the bent portion of the elastic object is a first bent portion,

the elastic object comprises a second bent portion, and

a space is defined between the columnar lancet body and the second bent portion of the elastic object which bends convexly toward the elongate extension.

3. The puncture instrument according to claim 1, wherein the protective cap is coupled, via a breakable separating part, to a puncture needle holder of the columnar lancet body for holding the puncture needle, and has an operation part on a front end side thereof.

4. The puncture instrument according to claim 1, wherein the elongate extension is one of two elongate extensions, the two elongate extensions being opposed to each other across the through hole.

5. The puncture instrument according to claim 1, wherein the elongate extension is plate-shaped.

6. The puncture instrument according to claim 1, wherein the elastic object is folded elongate plate-shaped.