Contact Activated Lancet Device

• US 20100249821A1
• Filed: 06/14/2010
• Published: 09/30/2010
• Est. Priority Date: 05/07/2004
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Rutynowski, Wlodzinierz, Karbowniczek, Jacek Grzegorz, Wilkinson, Bradley
• Granted Patent: US 8,906,055 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• CPC Class Codes: A61B 2017/00424 ergonomic, e.g. fitting in fist
• 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 5/150259 Improved gripping, e.g. with high friction pattern or projections on the housing surface or an ergonometric shape
• 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 5/150503 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 5/150618 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 5/150824 by visual feedback
• CPC Class Codes: A61B 5/15111 Semi-automatically triggered, e.g. at the end of the cocking procedure, for instance by biasing the main drive spring or when reaching sufficient contact pressure, the piercing device is automatically triggered without any deliberate action by the user
• 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 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable
• CPC Class Codes: A61B 5/15144 comprising driving means, e.g. a spring, for retracting the piercing unit into the housing

Abstract

A lancet device including a housing and a lancet structure having a puncturing element. The lancet structure disposed within the housing and adapted for movement between a retaining or pre-actuated position wherein the puncturing element is retained within the housing, and a puncturing position wherein the puncturing element extends through a forward end of the housing. The lancet device includes a drive spring disposed within the housing for biasing the lancet structure toward the puncturing position, and a retaining hub retaining the lancet structure in the retracted position against the bias of the drive spring. The retaining hub includes a pivotal lever in interference engagement with the lancet structure. An actuator within the housing pivots the lever, thereby moving the lancet structure toward the rearward end of the housing to at least partially compress the drive spring, and releasing the lever from interference engagement with the lancet structure.

Claims

1. A medical puncturing device, comprising:

a housing having a proximal end and a distal end;

a shield having a proximal end and a distal end, the shield proximal end disposed within the housing and comprising at least one flexure member, and the shield movable relative to the housing; and

a skin puncturing assembly disposed within the housing and comprising a movable carrier and a skin puncturing element mounted to the carrier, a distal end of the skin puncturing element adapted for puncturing the skin of a patient, the carrier movable from a retracted position wherein the distal end of the skin puncturing element is disposed within the shield to a puncturing position wherein the distal end is exposed from the shield to puncture the skin of the patient, the carrier maintained in the retracted position by engagement of the at least one flexure member with the carrier and moved from the retracted position to the puncturing position upon release of the at least one flexure member from the carrier. ‘

2. The medical puncturing device of claim 1, further comprising a drive spring disposed within the housing, the drive spring adapted to move the carrier from the retracted position to the puncturing position upon release of the at least one flexure member from the carrier.

3. The medical puncturing device of claim 2, further comprising a retraction spring disposed within the shield, the retraction spring adapted to return the carrier to a position within the housing wherein the shield encompasses the skin puncturing element after the carrier reaches the puncturing position.

4. The medical puncturing device of claim 1, wherein the shield is movable relative to the housing only in a proximal direction into the housing.

5. The medical puncturing device of claim 1, wherein the housing further comprises an actuating member adapted to co-act with the at least one flexure member to release the at least one flexure member of engagement with the carrier when the shield is moved relative to the housing.

6. The medical puncturing device of claim 5, wherein the actuating member and the at least one flexure member comprise opposing camming surfaces for causing the at least one flexure member to release engagement with the carrier when the shield is moved relative to the housing.

7. The medical puncturing device of claim 5, wherein at least one flexure member comprises an inward-directed projection engaging an edge on the carrier to maintain the carrier in the retracted position.

8. The medical puncturing device of claim 7, wherein the projection extends into a circumferential recess defined in the carrier and forming the engaged edge of the carrier.

9. The medical puncturing device of claim 7, wherein the at least one flexure member is adapted to flex radially outward when the shield is displaced into the housing, such that the at least one flexure member is released of engagement with the carrier.

10. The medical puncturing device of claim 9, wherein the at least one flexure member is adapted to break when flexed radially outward a preset distance.

11. A lancet device comprising:

a housing;

a lancet structure comprising a puncturing element, the lancet structure disposed within the housing and adapted for movement between a pre-actuated position wherein the puncturing element is retained within the housing and a puncturing position wherein the puncturing element extends through a front opening of the housing;

a drive spring disposed between a rearward end of the housing and the lancet structure for biasing the lancet structure toward the puncturing position; and

a retaining hub retaining the lancet structure in the pre-actuated position and adapted to retain the lancet structure against the bias of the drive spring, the retaining hub comprising a pivotal cam element, the cam element providing interference engagement with the lancet structure,

wherein axial movement of the housing toward the retaining hub causes the cam element to pivot, thereby moving the lancet structure toward the rearward end of the housing to at least partially compress the drive spring and release the cam element from interference engagement with the lancet structure, permitting the drive spring to drive the lancet structure through the housing toward the puncturing position.

12. The lancet device of claim 11, further comprising an internal contact within the housing, wherein movement of the housing toward the retaining hub causes the internal contact within the housing to pivot the cam element.

13. The lancet device of claim 12, wherein the cam element comprises a contact surface for engagement with the internal contact of the housing.

14. The lancet device of claim 13, wherein the internal contact of the housing comprises an integrally formed cam surface for cooperative engagement with the contact surface of the cam element.

15. The lancet device of claim 12, wherein the retaining hub comprises an annular rim, the annular rim comprising a pair of opposed support members connected by a pair of pivotal cam elements.

16. The lancet device of claim 15, wherein the cam elements comprise pivotal shafts connecting the support members.

17. The lancet device of claim 11, wherein the cam element defines a recess which releases the cam element from the interference engagement with the lancet structure when the cam element is pivoted

18. The lancet device of claim 17, wherein the interference engagement with the lancet structure is released when the cam element is pivoted about 180°

.

19. A lancet device comprising:

a housing;

a lancet structure comprising a puncturing element, the lancet structure disposed within the housing and adapted for movement between a pre-actuated position wherein the puncturing element is retained within the housing and a puncturing position wherein the puncturing element extends through an opening of the housing;

a biasing member in cooperation with the lancet structure for biasing the lancet structure toward the puncturing position; and

a retaining hub retaining the lancet structure in the pre-actuated position and adapted to retain the lancet structure against the bias of the biasing member, the retaining hub comprising a pivotal cam element, the cam element providing interference engagement with the lancet structure,

wherein axial movement of the housing toward the retaining hub causes the cam element to pivot, thereby moving the lancet structure toward the rearward end of the housing to at least partially compress the biasing member and release the cam element from interference engagement with the lancet structure, permitting the drive spring to drive the lancet structure through the housing toward the puncturing position.

20. The lancet device of claim 19, further comprising an internal contact within the housing, wherein movement of the housing toward the retaining hub causes the internal contact within the housing to pivot the cam element.

21. The lancet device of claim 20, wherein the retaining hub comprises an annular rim, the annular rim comprising a pair of opposed support members connected by a pair of pivotal cam elements.

22. The lancet device of claim 21, wherein the cam elements comprise pivotal shafts connecting the support members.

23. The lancet device of claim 19, wherein the cam element defines a recess which releases the cam element from the interference engagement with the lancet structure when the cam element is pivoted.

24. The lancet device of claim 23, wherein the interference engagement with the lancet structure is released when the cam element is pivoted about 180°

.