Single use lancet assembly

• US 20020077650A1
• Filed: 07/10/2001
• Published: 06/20/2002
• Est. Priority Date: 11/02/1999
• Status: Active Grant

• Current Assignee: Stat Medical Devices Incorporated
• Original Assignee: Stat Medical Devices Incorporated
• Inventors: Schraga, Steven
• Granted Patent: US 6,764,496 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 5/150412 Pointed piercing elements, e.g. needles, lancets for piercing the skin blade-like piercing elements A61B5/150442
• CPC Class Codes: A61B 5/150564 Protectors removed by pulling or pushing
• CPC Class Codes: A61B 5/150618 Integrally moulded protectors, e.g. protectors simultaneously moulded together with a further component, e.g. a hub, of the piercing element
• CPC Class Codes: A61B 5/150717 manually removed
• 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 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

A single use lancet device having a housing, with an open interior and an access opening defined therein, a lancet, with a body and a piercing tip, and disposed in the open interior of the housing so as to move between a cocked orientation and a piercing orientation, a driving assembly structured to move the lancet into the piercing orientation, and a restrictor assembly having a shoulder element and a restrictor panel operatively associated with the lancet and the housing and structured to pass over the restrictor panel upon the lancet moving from its cocked orientation to its piercing orientation, and to abut the restrictor panel upon attempted movement of the lancet back into its cocked orientation after movement into the piercing orientation, thereby preventing the lancet from moving back into the cocked orientation and preventing re-use of a contaminated piercing tip.

Claims

1. A single use lancet device comprising:

a housing, said housing including an at least partially open interior and an access opening defined therein;

a lancet, said lancet including a body and a piercing tip;

said lancet disposed in said open interior of said housing and structured to move at least between a cocked orientation and a piercing orientation;

an actuation assembly structured to release said lancet from said cocked orientation;

a driving assembly structured to move said lancet at least temporarily into said piercing orientation; and

a restrictor assembly structured to prevent said lancet from be oriented and maintained in a position which permits said driving assembly to move said lancet into said piercing orientation upon normal actuation of said actuation assembly, after said lancet has moved at least temporarily into said piercing orientation.

2. A single use lancet as recited in claim 1 wherein said driving assembly includes a biasing element operatively disposed between said lancet and said housing.

3. A single use lancet as recited in claim 2 wherein said biasing element comprises a spring.

4. A single use lancet as recited in claim 1 wherein said actuation assembly comprises a button structured to at least temporarily protrude from said housing when said lancet is disposed in said cocked orientation.

5. A single use lancet as recited in claim 1 wherein said restrictor assembly comprises and abutment structure cooperatively disposed between said housing and said lancet and structured to prevent said lancet from moving into said cocked orientation after movement into said piercing orientation.

6. A single use lancet as recited in claim 5 wherein said abutment structure comprises a shoulder element and a restrictor panel, said restrictor panel and said shoulder element structured to pass one another upon said lancet moving from said cocked orientation to said piercing orientation, and to abut one another upon attempted movement of said lancet into said cocked orientation after movement into said piercing orientation.

7. A single use lancet as recited in claim 6 wherein said shoulder element includes a sloped, at least partially biased configuration structured to at least partially retract to facilitate passage of said restrictor panel and said shoulder element past one another in a first direction corresponding movement of said lancet from said cocked orientation to said piercing orientation, and to expand subsequent said passage past one another in said first direction such that said shoulder element and said restrictor panel abut one another upon movement towards one another in a second direction generally opposite said first direction.

8. A single use lancet as recited in claim 7 wherein said shoulder element comprises a biased finger extending from said lancet, and said restrictor panel comprises a protruding element protruding from said housing.

9. A single use lancet as recited in claim 8 wherein said protruding element includes a sloped configuration which downwardly slopes away from said piercing tip of said lancet so as to facilitate passage thereof past said biased finger upon said lancet moving in a first direction towards said access opening.

10. A single use lancet as recited in claim 9 wherein said biased finger comprises an actuation button structured to release said lancet from said cocked orientation.

11. A single use lancet as recited in claim 1 further comprising a guide assembly operatively disposed between said lancet and said housing and structured to guide a substantially linear movement of said lancet through said housing.

12. A single use lancet as recited in claim 1 further comprising a protective cover structured to at least partially and removably cover said piercing tip of said lancet at least prior to movement of said lancet into said cocked orientation.