Push-button lance device and method

• US 8,043,318 B2
• Filed: 02/08/2007
• Issued: 10/25/2011
• Est. Priority Date: 02/08/2007
• Status: Active Grant

• Current Assignee: Stat Medical Devices Incorporated
• Original Assignee: Stat Medical Devices Incorporated
• Inventors: Schraga, Steven
• Primary Examiner(s): Hughes; Tom
• Assistant Examiner(s): Eastwood; David
• Application Number:
  US11/672,684
• Publication Number:
  US 20080195132A1
• Time in Patent Office: 1,720 Days
• Field of Search: 606/181, 606/182, 606/183, 606/184, 600/583
• US Class Current: 606/182
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150183 Depth adjustment mechanism using end caps mounted at the distal end of the sampling device, i.e. the end-caps are adjustably positioned relative to the piercing device housing for example by rotating or screwing
• 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 5/15113 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 5/15186 Devices loaded with a single lancet, i.e. a single lancet with or without a casing is loaded into a reusable drive device and then discarded after use; drive devices reloadable for multiple use
• 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

Lancet device utilizing a body, a holding member configured to receive a lancet having the lancet needle, a first spring structured and arranged to move the holding member between at least a retracted position and an extended position, and a second spring structured and arranged to move the holding member between at least an intermediate position and the retracted position. The first spring is at least one of smaller in diameter than the second spring and compressible by expansion of the second spring. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Claims

1. A lancet device comprising:

a body;

a front cover comprising a skin engaging end that includes a lancet opening through which a lancet needle may extend;

a holding member movably mounted within the body and comprising a front end and a rear end;

the front end being configured to receive a lancet having the lancet needle;

a first spring structured and arranged to move the holding member between at least a retracted position and an extended position;

a second spring structured and arranged to move the holding member between at least an intermediate position and the retracted position; and

a push-button arranged on a rear end of the body,

wherein, when the push-button is depressed, the second spring is compressed by the push-button, and

wherein, when the push-button is released, the second spring expands and the holding member is caused to move to a trigger-set position via a force generated by the second spring, and

wherein, when the holding member is caused to move to the trigger-set position by the release of the push-button, the first spring is caused to be compressed.

2. The lancet device of claim 1, wherein at least one of:

the lancet device has an adjustable depth of penetration arrangement;

the lancet device is a single-use lancet device; and

the lancet device is a multiple-use lancet device.

3. The lancet device of claim 1, wherein at least one of:

the lancet device comprises an adjustable depth of penetration arrangement; and

the lancet device comprises an intermediate member that is at least one of axially adjustably connected to the body and threadably connected to the body.

4. The lancet device of claim 3, wherein the intermediate member is non-removably connected to the body and wherein the front cover is movably and removably connected to the intermediate member.

5. The lancet device of claim 3, wherein movement of the intermediate member adjusts a depth of penetration of the lancet needle.

6. The lancet device of claim 3, wherein the front cover is non-rotatably mounted to the intermediate member.

7. The lancet device of claim 1, wherein the front cover is devoid of moving parts.

8. The lancet device of claim 1, wherein the front cover comprises a one-piece plastic or synthetic resin member.

9. The lancet device of claim 3, wherein movement of the intermediate member changes an overall length of the lancet device and wherein the intermediate member is spaced from the front cover.

10. The lancet device of claim 1, wherein axial expansion of the second spring causes axial compression of the first spring.

11. The lancet device of claim 1, wherein the second spring is sized to resist greater compression forces than the first spring.

12. The lancet device of claim 1, wherein the second spring is larger in diameter than the first spring.

13. The lancet device of claim 1, wherein the second spring is made from a wire having a larger diameter than a wire of the first spring.

14. The lancet device of claim 1, wherein each of the first and the second springs comprise helical compression springs.

15. The lancet device of claim 1, wherein the first spring has one end coupled to a portion of the body and another end coupled to a portion of the holding member.

16. The lancet device of claim 1, wherein the second spring biases the push-button towards an extended position.

17. The lancet device of claim 1, wherein the lancet device is structured and arranged to allow for replacement of the lancet and for multiple use.

18. The lancet device of claim 1, wherein the lancet is removably connected to the front end of the holding member.

19. The lancet device of claim 1, further comprising an arrangement for moving the holding member to a retracted or trigger-set position.

20. The lancet device of claim 1, wherein the holding member comprises a generally cylindrical cross-section.

21. The lancet device of claim 1, wherein the holding member comprises a generally polygonal cross-section.

22. The lancet device of claim 1, further comprising a locking member structured and arranged to releasably lock with the holding member and thereby retain the holding member in the retracted position.

23. The lancet device of claim 1, further comprising a deflecting member coupled to the holding member, wherein the deflecting member is engagable with a trigger.

24. The lancet device of claim 1, further comprising a trigger movably mounted to the body.

25. The lancet device of claim 1, further comprising a fixed stop surface that is contacted by a movable stop surface when the holding member moves to an extended position.

26. The lancet device of claim 1, wherein the front cover is removably and non-threadably mounted to a front portion of the body and further comprising an intermediate member non-removably mounted to a rear portion of the body.

27. The lancet device of claim 1, further comprising a mechanism for at least temporarily maintaining a depth setting position.

28. The lancet device of claim 1, wherein the holding member comprises an integrally formed deflecting member that engages a surface of the body.

29. The lancet device of claim 1, wherein the front end of the holding member comprises an opening that is configured to removably receive the lancet.

30. The lancet device of claim 1, further comprising at least one deflectable member configured to be deflected by a trigger thereby causing movement of the holding member to the extended position.

31. The lancet device of claim 30, wherein the at least one deflectable member is coupled to the push-button.

32. The lancet device of claim 30, wherein the at least one deflectable member is integrally formed with the push-button.

33. The lancet device of claim 1, further comprising indicia arranged on at least one of an intermediate member and the body.

34. The lancet device of claim 33, wherein the indicia is arranged on an outer circumferential surface of the body.

35. The lancet device of claim 33, wherein the indicia is arranged on an outer circumferential surface of the intermediate member.

36. The lancet device of claim 1, wherein the front cover rotates about an axis that runs through the lancet opening and the holding member without changing an overall length of the lancet device.

37. The lancet device of claim 1, wherein the second spring is disposed between a trigger and a back cap or the push-button.

38. The lancet device of claim 1, wherein the body comprises a two-piece body.

39. The lancet device of claim 1, wherein the body comprises an ergonomic shape.

40. The lancet device of claim 1, wherein the body comprises a plastic material.

41. The lancet device of claim 1, further comprising an intermediate member that comprises at least one of an external high-friction gripping surface and gripping protrusions.

42. The lancet device of claim 1, further comprising threads connecting an intermediate member to the body.

43. A method of puncturing a surface of skin using the lancet device of claim 1, the method comprising:

adjusting a set depth of penetration by rotating the intermediate member to a desired set position;

disposing the skin engaging end against a user'"'"'s skin; and

compressing the second spring and thereafter allowing the second spring to automatically expand thereby causing compression of the first spring.

44. A method of puncturing a surface of skin using the lancet device of claim 1, the method comprising:

adjusting a set depth of penetration by rotating the intermediate member to a desired set position;

disposing the skin engaging end against a user'"'"'s skin; and

compressing the second spring while the first spring remains in an unstressed state and thereafter allowing the second spring to expand thereby causing compression of the first spring.

45. A method of puncturing a surface of skin using the lancet device of claim 1, the method comprising:

disposing the skin engaging end against a user'"'"'s skin; and

compressing the second spring while the first spring remains in an unstressed state and thereafter allowing the second spring to expand thereby automatically causing compression of the first spring.

50. The lancet device of claim 1, wherein, when the holding member is caused to move via the second spring to the trigger-set position by the release of the push-button and rearward movement of the push-button, the first spring is caused to be compressed by an expansion force of the second spring.

51. The lancet device of claim 1, wherein the first spring is arranged to surround a portion of the lancet holding member.

52. The lancet device of claim 1, wherein the first spring and the second spring each have a center axis arranged parallel to an axis of the lancet holding member.

53. The lancet device of claim 1, wherein the first spring and the second spring each have a center axis arranged parallel to one another.

54. The lancet device of claim 1, wherein the first spring and the second spring are axially spaced from one another.

55. The lancet device of claim 1, wherein the lancet device is cocked and trigger by rearward movement of the push-button.

56. The lancet device of claim 1, wherein the lancet device is cocked and trigger by rearward movement of the push-button which is caused by axial expansion of the second spring.

57. The lancet device of claim 1, wherein the lancet device is automatically cocked and trigger by rearward movement of the push-button and axial expansion of the second spring.

58. The lancet device of claim 1, wherein the lancet device is automatically triggered after the push-button is released and moves back away from the body to a pre-determined position.

46. An adjustable depth of penetration lancet device, the lancet device comprising:

a body;

a front cover comprising a skin engaging end that includes a lancet opening through which a lancet needle may extend;

a holding member movably mounted within the body and comprising a front end and a rear end;

the front end being configured to receive a lancet having the lancet needle;

a first spring structured and arranged to move the holding member between at least a retracted position and an extended position;

a second spring structured and arranged to at least one of;

move the holding member between at least an intermediate position and the retracted position; and

cause compression of the first spring;

a push-button member structured and arranged to cause compression of the second spring when the push-button is depressed and to cause compression of the first spring when the push-button is released; and

the push button also being structured and arranged to move the holding member to the retracted position after a portion of the push-button is releasably connected to a portion of the holding member.

47. A lancet device comprising:

a body having a front end and a rear end;

a holding member configured to receive a lancet having the lancet needle;

a first spring structured and arranged to move the holding member between at least a retracted position and an extended position; and

a second spring structured and arranged to move the holding member between at least an intermediate position and the retracted position,

wherein expansion of the second spring automatically causes compression of the first spring and movement of the holding member to the retracted position, and wherein, after the holding member moves to a trigger-set position, the lancet device is automatically triggered,

wherein the first spring is arranged axially closer to the front end of the body than the second spring and is at least one of;

smaller in diameter than the second spring; and

compressible by expansion of the second spring.

48. The lancet device of claim 47, further comprising at least one of:

a push-button member structured and arranged to cause compression of the second spring and to move the holding member to the retracted position; and

a triggering arrangement structured and arranged to releasably engage with the holding member.

49. A lancet device comprising:

a body;

a movable lancet holding member structured and arranged to receive a removable lancet; and

a cocking and triggering system structured and arranged to automatically cock and trigger the lancet device when activated by a user,

wherein the cocking and triggering system includes a push-button arranged on a rear end of the body which, when depressed, compresses one spring and moves to a position so as to allow the push-button to releasably connect to the lancet holding member and, when released, releasably connects to the lancet holding member and moves the lancet holding member towards a trigger-set position and causes compression of another spring, and then automatically disconnects from the lancet holding member.