LANCET

• US 20150080929A1
• Filed: 04/17/2013
• Published: 03/19/2015
• Est. Priority Date: 04/20/2012
• Status: Active Grant

• Current Assignee: Clinical Innovations LLC (Clinical Innovations)
• Original Assignee: Medipurpose PTE. LTD.
• Inventors: Yi, Patrick, Gibb, Robert L.
• Granted Patent: US 9,724,031 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150175 Adjustment of penetration depth
• CPC Class Codes: A61B 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• CPC Class Codes: A61B 5/150442 Blade-like piercing elements, e.g. blades, cutters, knives, for cutting 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 5/150893 by indicating if used, tampered with, unsterile or defective
• CPC Class Codes: A61B 5/150916 by blocking components, e.g. piston, driving device or fluid passageway
• 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 5/15128 comprising 2D- or 3D-shaped elements, e.g. cams, curved guide rails or threads comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

The invention relates to a lancet for performing an incision. The lancet has a blade for providing an incision and a trigger housed in a housing. The trigger has a first trigger arm, a second trigger arm and a flexible member connected to the second trigger arm. A resilient member may be disposed within the housing in a pre-cutting state in which it stores energy and arranged to exert a force for moving the second trigger arm and the blade from a first stowed position through a cutting position and to a second stowed position.

Claims

1. A lancet comprising:

a blade;

a housing;

a trigger comprising a first trigger arm, a second trigger arm connected to the first trigger arm through a hinge, and a flexible member connected to the second trigger arm, the flexible member configured to allow the blade to be manoeuvred, upon activation of the trigger, in a cutting path from a first stowed position through a cutting position to a second stowed position; and

a resilient member disposed within the housing in a pre-cutting state in which it stores energy and arranged to exert a force for moving the second trigger arm upon activation of the trigger.

2. The lancet as claimed in claim 1, wherein the resilient member is disposed between the first trigger arm and the second trigger arm.

3. The lancet as claimed in claim 1, wherein the flexible member is connected to an end of the second trigger arm.

4. The lancet as claimed in claim 1, wherein the housing comprises:

a first stop surface for abutting the second trigger arm with the blade in the first stowed position; and

a second stop surface for abutting the second trigger arm with the blade in the second stowed position, wherein the blade is within the housing in the first stowed and second stowed positions.

5. The lancet as claimed in claim 4, wherein the second trigger arm is configured to slide relative to the first stop surface upon movement of the first trigger arm.

6. The lancet as claimed in claim 5, wherein the second trigger arm has a chamfered surface.

7. The lancet as claimed in claim 4, wherein the housing includes a rear member having the first stop surface and the second stop surface, the rear member positioned to define a gap between the second stop surface and an inner wall of the housing for receiving the second trigger arm and the blade in the second stowed position.

8. The lancet as claimed in claim 7, further comprising a blade holder connected to the flexible member for holding the blade, the blade holder being configured to allow the blade to be manoeuvred.

9. The lancet as claimed in claim 1, wherein the housing includes cam elements of a size and shape for guiding the blade through a path to define the cutting path.

10. The lancet as claimed in claim 9, wherein the cam elements are configured for guiding the blade through a substantially parabolic path to define a cutting path for performing the incision.

11. The lancet as claimed in claim 9, wherein the housing includes a cam configured for guiding the blade holder and the blade towards the second stowed position.

12. The lancet as claimed in claim 1, wherein the first trigger arm includes a base portion connected to the second trigger arm through the hinge, a second portion extending from the base portion, and a slider portion connected to the second portion, the second portion being configured, upon movement of the trigger, to allow the trigger to rotate about a pivot in the housing.

13. The lancet as claimed in claim 12, wherein the slider portion is configured to be slideable along surfaces in the housing.

14. The lancet as claimed in claim 1, wherein the resilient member is one of:

a helical torsion spring, a leaf spring, a cantilever spring or a helical compression spring.

15. The lancet as claimed in claim 14, wherein the resilient member is a cantilever spring integral with the trigger, the cantilever spring being configured to store energy in the pre-cutting state.

16. The lancet as claimed in claim 1, wherein the resilient member is made of a resilient metal.

17. The lancet as claimed in claim 16, wherein the resilient member is made of one of:

high carbon steel, stainless steel, alloy steel and nickel-base alloy.

18. The lancet as claimed in claim 1, further comprising a trigger lock for preventing movement of the trigger.

19. The lancet as claimed in claim 1, wherein the flexible member has a substantially S-shaped profile.