Contact Activated Lancet Device

• US 20100305601A1
• Filed: 06/14/2010
• Published: 12/02/2010
• Est. Priority Date: 05/07/2004
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Wilkinson, Bradley M., Rutynowski, Wlodzinierz, Karbowniczek, Jacek Grzegorz
• Granted Patent: US 9,066,688 B2
• Time in Patent Office: Days
• US Class Current: 606/182
• 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 5/150519 Details of construction of hub, i.e. element used to attach the single-ended needle to a piercing device or sampling device
• CPC Class Codes: A61B 5/150549 Protectors removed by rotational movement, e.g. torsion or screwing
• CPC Class Codes: A61B 5/150564 Protectors removed by pulling or pushing
• CPC Class Codes: A61B 5/15061 by material engagement, e.g. welding, bonding
• 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 5/151 Devices specially adapted for taking samples of capillary blood, e.g. by lancets , needles or blades
• 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 5/15113 Manually triggered, i.e. the triggering requires a deliberate action by the user such as pressing a drive button
• CPC Class Codes: A61B 5/15115 Driving means for propelling the piercing element to pierce the skin, e.g. comprising mechanisms based on shape memory alloys, magnetism, solenoids, piezoelectric effect, biased elements, resilient elements, vacuum or compressed fluids
• 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 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 and a puncturing position wherein the puncturing element extends through an end of the housing;

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

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

wherein movement of the housing toward the lever element causes pivotal movement of the lever element to at least partially compress the biasing member and release the interference engagement between the lever element and the lancet structure, permitting the biasing member to drive the lancet structure through the housing toward the puncturing position.

2. The lancet device of claim 1, further comprising an internal contact within the housing, wherein movement of the housing toward the lever element causes the internal contact within the housing to pivot a portion of the lever element about a pivot point.

3. The lancet device of claim 1, wherein the lever element comprises a wedge-shaped structure including a shoulder in interference engagement with the lancet structure and a contact surface for engagement with the internal contact of the housing.

4. The lancet device of claim 1, wherein a pair of opposing lever elements provide interference engagement with the lancet structure and retain the lancet structure in the pre-actuated position and are adapted to retain the lancet structure against the bias of the biasing member.

5. The lancet device of claim 1, further comprising a shield extending through the forward end of the housing and movable with respect to the housing, with the lever element adjacent a rearward end of the shield.

6. The lancet device of claim 5, wherein the lancet structure and the shield include corresponding guiding surfaces for guiding the lancet structure through the shield, and the shield and the housing include corresponding guiding surfaces for guiding the shield through the housing.

7. The lancet device of claim 5, further comprising a retraction spring for retracting the lancet structure within the shield after the drive spring drives the lancet structure through the shield toward the puncturing position, and a locking structure extending between the shield and the housing for maintaining the shield in fixed relation to the housing after the biasing member drives the lancet structure through the shield toward the puncturing position.

8. A lancet device comprising:

a housing comprising a forward housing body and a rear housing body;

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 forward end of the housing;

a biasing member biasing the lancet structure toward the puncturing position;

a retaining hub retaining the lancet structure in the pre-actuated position against the bias of the biasing member, the retaining hub comprising a pivotal lever, the lever providing interference engagement with the lancet structure; and

an actuator adapted to pivot the lever, thereby releasing the lever from interference engagement with the lancet structure, permitting the biasing member to drive the lancet structure toward the puncturing position,

wherein the forward housing body and the rear housing body mate at a position substantially peripheral to the retaining hub within the housing.

9. The lancet device of claim 8, wherein the forward housing body and the rear housing body are affixed with an adhesive material or are affixed by a mechanical engagement therebetween.

10. 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 and a puncturing position wherein the puncturing element extends through an end of the housing;

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

a lever element comprising a class 1 lever for providing interference engagement with the lancet structure and retaining the lancet structure in the pre-actuated position and adapted to retain the lancet structure against the bias of the biasing member,

wherein movement of the housing toward the lever element causes pivotal movement of the lever element and release of the interference engagement between the lever element and the lancet structure, permitting the biasing member to drive the lancet structure through the housing toward the puncturing position.

11. A lancet device comprising:

a housing comprising a forward housing body and a rear housing body;

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 forward end of the housing;

a drive spring biasing the lancet structure toward the puncturing position;

a retaining hub retaining the lancet structure in the pre-actuated position against the bias of the drive spring, the retaining hub comprising a lever pivotal about a fulcrum, the lever providing interference engagement with the lancet structure; and

an actuator adapted to pivot the lever about the fulcrum, thereby releasing the lever from interference engagement with the lancet structure, permitting the drive spring to drive the lancet structure toward the puncturing position,

wherein the forward housing body and the rear housing body mate at a position substantially peripheral to the retaining hub within the housing.