LANCING DEVICE AND LANCET

• US 20130072818A1
• Filed: 11/13/2012
• Published: 03/21/2013
• Est. Priority Date: 12/18/2008
• Status: Active Grant

• Current Assignee: Facet Technologies LLC
• Original Assignee: Facet Technologies LLC
• Inventors: LAMPS, Gregory, COLLINS, Brian M., PUSEY, Lauren R.
• Granted Patent: US 9,095,294 B2
• Time in Patent Office: Days
• US Class Current: 600/583
• 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 5/15019 Depth adjustment mechanism using movable stops located inside the piercing device housing and limiting the travel of the drive mechanism mechanisms using distal end caps A61B5/150183, mechanisms at the piercing element carrier proximal end A61B5/150198
• 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 5/150442 Blade-like piercing elements, e.g. blades, cutters, knives, for cutting the skin
• 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 5/1513 comprising linear sliding guides comprising tooth-shaped elements A61B5/15132
• CPC Class Codes: A61B 5/15132 comprising tooth-shaped elements, e.g. toothed wheel or rack and pinion
• CPC Class Codes: A61B 5/1519 comprising driving means, e.g. a spring, for propelling the piercing unit
• 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 lancing device and lancet are provided with depth-control, lancet ejection, and/or guidance mechanisms. The depth-control mechanism includes a dial rotationally mounted at a distal end of the housing of the lancing device, the dial being coupled to a linkage whereby rotation of the dial imparts translational movement to a stop surface of the linkage to limit the stroke of the lancet and thereby control lancing penetration depth. The ejection mechanism includes an ejector that is advanced into contact with a transversely flared flange of the lancet to discharge the lancet from the lancing device. The guidance mechanism includes an inner guidance housing for restricting out-of-axis movement of a lancet carrier.

Claims

1. A lancing device comprising:

a lancet carrier comprising a lancet carrier stop;

a drive spring for propelling the lancet carrier along a lancing stroke defining a stroke distance; and

a depth control mechanism comprising;

a dial that is rotational about a center of rotation, the dial further comprising a mounting pin eccentrically offset from the center of rotation; and

a stop bar having a first end mounted to the mounting pin of the dial and a second end comprising a stop surface for contact with the lancet carrier stop to adjust the stroke distance of the lancet carrier.

2. The lancing device of claim 1, wherein the stop bar has a generally T-shaped profile with a lengthwise axis and a transverse rib forming the stop surface and extending generally perpendicular to the lengthwise axis.

3. The lancing device of claim 1, wherein the lancet carrier comprises a distal extension arm having the lancet carrier stop extending therefrom.

4. The lancing device of claim 3, wherein the lancet carrier stop comprises a sleeve retained on the distal extension arm.

5. The lancing device of claim 1, wherein rotation of the dial drives an axial component of motion of the stop bar and a transverse component of motion of the stop bar.

6. The lancing device of claim 5, wherein the axial and transverse components of motion generate a pivotal motion of the stop bar.

7. The lancing device of claim 1, wherein the lancet carrier, the drive spring and the stop bar are enclosed within a housing, and wherein a rearward end of the housing is radiused to generally match a profile of the dial, with only an outer periphery of the dial projecting beyond the rearward end of the housing.

8. A lancing device comprising:

a lancet carrier axially movable within a housing, the lancet carrier further comprising a lancet carrier stop;

a drive spring for propelling the lancet carrier along a lancing stroke defining a stroke distance; and

a depth control mechanism comprising;

a dial rotationally mounted to the housing defining an axis of rotation, the dial comprising a centrally positioned arcuate flange and a pin eccentrically offset therefrom; and

an arm having a first end mounted to the pin of the dial and a second end comprising a stop surface for contact with the lancet carrier stop to adjust the stroke distance of the lancet carrier.

9. The lancing device of claim 8, wherein the housing is generally elongate and extends from a proximal end to a distal end.

10. The lancing device of claim 8, wherein the dial rotates in a horizontal plane along the medial axis of the housing, and wherein the axis of rotation of the dial is generally perpendicular to a path of travel of a lancet engaged with the lancet carrier and moving along the lancing stroke.

11. The lancing device of claim 9, wherein the dial is mounted at the distal end of the housing.

12. The lancing device of claim 11, wherein the arcuate flange of the dial is engaged with an arcuate channel formed within the housing.

13. The lancing device of claim 8, wherein rotation of the dial drives an axial component of the arm and a transverse component of the arm.

14. The lancing device of claim 13, wherein the axial and transverse components of motion generate a pivotal motion of the stop bar.

15. The lancing device of claim 8, wherein the arm comprises guidance features which engage the housing.

16. The lancing device of claim 15, wherein the guidance features permit the stop bar to translate in an axis parallel to the path of travel of the lancet along its lancing stroke but to rotate freely around an axis parallel to the axis of rotation of the dial.

17. A lancing device comprising:

a housing defining a proximal end having a lancet opening formed therein, a distal end opposite the proximal end, and a lengthwise axis extending between the proximal and distal ends, and wherein a medial plane divides the housing into an upper housing half and a lower housing half;

a lancet carrier axially movable within the housing;

a drive spring for propelling the lancet carrier along a lancing stroke; and

a depth control mechanism comprising a dial mounted between the upper housing half and the lower housing half, and rotational about an axis of rotation generally perpendicular to the medial plane, and an arm having a first end eccentrically coupled to the dial and a second end comprising a stop surface for contacting the lancet carrier to limit movement of the lancet carrier.

18. The lancing device of claim 17, wherein the second end of the arm is connected to an eccentric pin extending from the dial.

19. The lancing device of claim 17, wherein the distal end of the housing is radiused to generally match a profile of the dial, with only an outer periphery of the dial projecting beyond the housing.

20. The lancing device of claim 17, wherein the arm comprises a lengthwise axis and a transverse rib forming the stop surface and extending generally perpendicular to the lengthwise axis.