Lancet having adjustable penetration depth

• US 20030225430A1
• Filed: 06/18/2003
• Published: 12/04/2003
• Est. Priority Date: 06/11/1998
• Status: Active Grant

• Current Assignee: Stat Medical Devices Incorporated
• Original Assignee: Stat Medical Devices Incorporated
• Inventors: Schraga, Steven
• Granted Patent: US 7,311,718 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 5/150175 Adjustment of penetration depth
• 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 5/150198 Depth adjustment mechanism at the proximal end of the carrier of the piercing element
• CPC Class Codes: A61B 5/150351 Caps, stoppers or lids for sealing or closing a blood collection vessel or container, e.g. a test-tube or syringe barrel caps for bottles or containers in general B65D41/00
• 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 5/1513 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: Y10T 29/53657 to apply or remove a resilient article [e.g., tube, sleeve, etc.]

Abstract

Lancet device including a first housing. A first guide wall is disposed within the first housing. The first guide wall includes an opening. A cap removably mounted to the first housing. A needle holding member for holding a lancet. At least a portion of the needle holding member being able to move within the opening. A first spring for biasing the needle holding member toward an extended position. The first spring surrounding a portion of the needle holding member and being disposed between the first guide wall and a shoulder of the needle holding member. A movable trigger having a first position and a second position. A movable second housing including a proximal end, a distal end and a second guide wall arranged at the proximal end. The second guide wall including an opening. A portion of the needle holding member being able to move within the opening of the second guide wall. The second housing being configured to move the needle holding member to the retracted position when the second housing is moved away from the first housing. The proximal end of the second housing being configured to move axially within the distal end of the first housing. A second spring for biasing the second housing towards the first housing. The second spring surrounding a portion of the needle holding member and being disposed between the second guide wall and another shoulder of the needle holding member. At least a portion of the needle holding member is always retained within the first housing.

Claims

1. A lancet device comprising:

a first housing comprising a proximal end and a distal end;

a first guide wall disposed within the first housing;

the first guide wall comprising an opening;

a cap removably mounted to the proximal end of the first housing and for positioning the lancet device relative to a skin surface;

a needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing;

at least a portion of the needle holding member being able to move within the opening of the first guide wall;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member and being disposed between the first guide wall and a shoulder of the needle holding member;

a movable trigger arranged on a side of the first housing;

the trigger having a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a movable second housing comprising a proximal end, a distal end and a second guide wall arranged at the proximal end of the second housing;

the second guide wall comprising an opening;

at least a portion of the needle holding member being able to move within the opening of the second guide wall;

the second housing being configured to move the needle holding member to the retracted position when the second housing is moved away from the first housing;

the proximal end of the second housing being configured to move axially within the distal end of the first housing;

a second spring for biasing the second housing towards the first housing; and

the second spring surrounding a portion of the needle holding member and being disposed between the second guide wall and another shoulder of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the first housing.

2. The lancet device of claim 1, further comprising a lock retainer mounted to a distal end of the needle holding member.

3. The lancet device of claim 1, wherein the first housing, in transverse cross-section, is one of triangular, D-shaped, and polygonal.

4. The lancet device of claim 1, wherein the other shoulder of the needle holding member is arranged at a distal end of the needle holding member.

5. A lancet device comprising:

a first housing comprising a proximal end and a distal end;

a first guide wall arranged within the first housing;

the first guide wall comprising an opening;

a cap removably mounted to the proximal end of the first housing and for positioning the lancet device relative to a skin surface;

a needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing;

at least a portion of the needle holding member being able to move within the opening of the first guide wall;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member and being disposed between the first guide wall and a shoulder of the needle holding member;

a trigger arranged on a side of the first housing;

the trigger having a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a second housing comprising a proximal end, a distal end and a second guide wall;

the second housing being configured to move the needle holding member to the retracted position when the second housing is moved away from the first housing;

the second guide wall comprising an opening;

at least a portion of the needle holding member being able to move within the opening of the second guide wall;

the proximal end of the second housing being configured to move axially within the distal end of the first housing;

a second spring for biasing the second housing towards the first housing;

the second spring surrounding a distal portion of the needle holding member and being disposed between the second guide wall and a distal end of the needle holding member; and

a lock retainer mounted to the distal end of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the first housing.

6. The lancet device of claim 5, wherein the second spring is arranged between the lock retainer and the second guide wall.

7. The lancet device of claim 5, wherein the first housing is one of triangular, D-shaped, and polygonal.

8. The lancet device of claim 5, wherein the distal end of the needle holding member comprises a shoulder.

9. A lancet device comprising:

a first housing comprising a proximal end and a distal end;

a first guide wall arranged inside the first housing;

the first guide wall comprising an opening;

a cap removably mounted to the proximal end of the first housing;

the cap having a proximal end for engaging a skin surface;

a movable needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing;

at least a portion of the needle holding member being able to move within the opening of the first guide wall;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding at least a portion of the needle holding member;

the first spring being disposed between the first guide wall and a shoulder of the needle holding member;

a trigger arranged on a side wall of the first housing;

the trigger being movable between a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a movably mounted second housing comprising a proximal end and a distal end;

the second housing comprising a second guide wall;

the second housing being configured to move the needle holding member to the retracted position when the second housing is moved axially away from the first housing;

the second guide wall comprising an opening;

at least a portion of the needle holding member being able to move within the opening of the second guide wall;

the proximal end of the second housing being configured to move axially within the distal end of the first housing;

a second spring for biasing the second housing towards the first housing;

a lock retainer mounted to a distal end of the needle holding member; and

the second spring surrounding a portion of the needle holding member and being disposed between the second guide wall and the lock retainer,

wherein at least a portion of the needle holding member is always retained within the first housing.

10. The lancet device of claim 9, wherein the first housing is one of triangular, D-shaped, and polygonal.

11. The lancet device of claim 9, wherein the distal end of the needle holding member comprises a shoulder.

12. A lancet device comprising:

a main housing comprising a proximal end and a distal end;

a guide wall arranged in the main housing and extending transverse to an axis running through the main housing;

the guide wall comprising an opening;

a cap removably mounted to the proximal end of the main housing;

the cap having a proximal end for engaging a skin surface;

a movable needle holding member for holding a lancet, the needle holding member being at least partially contained within the main housing;

at least a portion of the needle holding member being able to move within the opening of the guide wall;

a first spring that biases the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member;

the first spring being arranged between the guide wall and a shoulder of the needle holding member;

a trigger arranged on a side wall of the main housing;

the trigger being movable between a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a distal housing comprising a proximal end and a distal end;

the distal housing comprising a guide wall;

the distal housing being configured to move the needle holding member to the retracted position when the distal housing is moved away from the main housing;

the guide wall of the distal housing comprising an opening;

at least a portion of the needle holding member being able to move within the opening of the guide wall of the distal housing;

the proximal end of the distal housing being configured to move axially within the distal end of the main housing;

a second spring for biasing the distal housing towards the main housing;

a lock retainer mounted to a distal end of the needle holding member; and

the second spring surrounding a distal portion of the needle holding member and being disposed between the guide wall of the distal housing and the lock retainer,

wherein at least a portion of the needle holding member is always retained within the first housing.

13. The lancet device of claim 12, wherein the main housing is one of triangular, D-shaped, and polygonal.

14. The lancet device of claim 12, wherein the distal end of the needle holding member comprises a shoulder.

15. A lancet device comprising:

a main housing comprising a proximal end and a distal end;

a guide wall arranged in the main housing and extending transverse to an axis running through the main housing;

the guide wall comprising an opening;

a cap removably mounted to the proximal end of the main housing;

the cap having a proximal end for engaging a skin surface;

a movable needle holding member for holding a lancet, the needle holding member being at least partially contained within the main housing;

at least a portion of the needle holding member being able to move within the opening of the guide wall;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member;

the first spring being disposed between the guide wall and a shoulder of the needle holding member;

a movable trigger arranged on a side of the main housing;

the trigger being movable between a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a distal housing arranged at the distal end of the main housing;

the distal housing comprising a proximal end, a distal end and a guide wall arranged at the proximal end of the distal housing;

the distal housing being configured to move the needle holding member to the retracted position when the distal housing is moved away from the main housing;

the guide wall of the distal housing comprising an opening;

a portion of the needle holding member being able to move within the opening of the guide wall of the distal housing;

the proximal end of the distal housing being configured to move axially within the distal end of the main housing;

a second spring that biases the distal housing towards the main housing; and

the second spring surrounding a portion of the needle holding member and being disposed between the guide wall of the distal housing and a distal end of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the first housing.

16. The lancet device of claim 15, further comprising a lock retainer mounted to the distal end of the needle holding member.

17. The lancet device of claim 15, wherein the main housing is one of triangular, D-shaped, and polygonal.

18. The lancet device of claim 16, further comprising a distal shoulder arranged at the distal end of the needle holding member.

19. The lancet device of claim 18, wherein the needle holding member comprises a mechanism that cooperates with the trigger to retain the needle holding member in a retracted position.

20. The lancet device of claim 19, wherein the mechanism comprises a shoulder.

21. The lancet device of claim 18, further comprising a fastening mechanism for securing the cap to the main housing.

22. The lancet device of claim 18, wherein the proximal end of the main housing is open and wherein the distal end of the main housing is open.

23. A lancet device comprising:

a first housing comprising a proximal end and a distal end;

a first guide wall disposed within the first housing;

the first guide wall comprising an opening;

a cap removably mounted to the proximal end of the first housing and for positioning the lancet device relative to a skin surface;

a needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing;

at least a portion of the needle holding member being able to move within the opening of the first guide wall;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member and being disposed between the first guide wall and a shoulder of the needle holding member;

a movable trigger arranged on a side of the first housing;

the trigger having a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a movable second housing comprising a proximal end, a distal end, a shoulder arranged between the proximal end and the distal end, and a second guide wall arranged at the proximal end of the second housing;

the second guide wall comprising an opening;

a portion of the needle holding member being able to move within the opening of the second guide wall;

the second housing being configured to move the needle holding member to the retracted position when the second housing is moved away from the first housing;

the proximal end of the second housing being configured to move axially within the distal end of the first housing;

a second spring for biasing the second housing towards the first housing; and

the second spring surrounding a portion of the needle holding member and being disposed between the second guide wall and another shoulder of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the first housing.

24. The lancet device of claim 23, further comprising a lock retainer mounted to a distal end of the needle holding member.

25. The lancet device of claim 23, wherein the first housing is one of triangular, D-shaped and polygonal.

26. The lancet device of claim 23, wherein the other shoulder of the needle holding member is arranged at a distal end of the needle holding member.

27. The lancet device of claim 23, wherein the shoulder of the second housing is sized to be larger than the proximal end of the second housing, whereby the shoulder of the second housing limits movement of the second housing towards the first housing.

28. A lancet device comprising:

a first housing comprising a proximal end and a distal end;

a second housing at least partially disposed in the first housing;

a guide wall arranged on the second housing;

the guide wall being disposed within the first housing;

the guide wall comprising an opening;

a removably mounted cap for positioning the lancet device relative to a skin surface;

a needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing and the second housing;

at least a portion of the needle holding member being able to move within the opening of the guide wall of the second housing;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member and being disposed between the guide wall of the second housing and a shoulder of the needle holding member;

a trigger arranged on a side of the first housing;

the trigger having a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a third housing comprising a proximal end, a distal end and a guide wall;

the third housing being configured to move the needle holding member to the retracted position when the third housing is moved away from the first housing;

the guide wall of the third housing comprising an opening;

at least a portion of the needle holding member being able to move within the opening of the guide wall of the third housing;

the proximal end of the third housing being configured to move axially within the distal end of the first housing;

a second spring for biasing the third housing towards the first housing;

the second spring surrounding a distal portion of the needle holding member and being disposed between the guide wall of the third housing and a distal end of the needle holding member; and

a lock retainer mounted to the distal end of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the first housing.

29. The lancet device of claim 28, wherein the second spring is arranged between the lock retainer and the guide wall of the third housing.

30. The lancet device of claim 28, wherein the first housing is one of triangular, D-shaped, and polygonal.

31. The lancet device of claim 28, wherein the distal end of the needle holding member comprises a shoulder.

32. A lancet device comprising:

a first housing comprising a proximal end and a distal end;

a first guide wall arranged on a second housing;

the second housing being at least partially disposed within the first housing;

the first guide wall being disposed inside the first housing;

the first guide wall comprising an opening;

a removably mounted cap;

the cap having a proximal end for engaging a skin surface;

a movable needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing;

at least a portion of the needle holding member being able to move within the opening of the first guide wall;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding at least a portion of the needle holding member;

the first spring being disposed between the first guide wall and a shoulder of the needle holding member;

a trigger arranged on a side wall of the first housing;

the trigger being movable between a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a movably mounted third housing comprising a proximal end and a distal end;

the third housing comprising a second guide wall;

the third housing being configured to move the needle holding member to the retracted position when the third housing is moved axially away from the first housing;

the second guide wall comprising an opening;

a portion of the needle holding member being able to move within the opening of the second guide wall;

the proximal end of the third housing being configured to move axially within the distal end of the first housing;

a second spring for biasing the third housing towards the first housing;

a lock retainer mounted to a distal end of the needle holding member; and

the second spring surrounding a portion of the needle holding member and being disposed between the second guide wall and the lock retainer,

wherein at least a portion of the needle holding member is always retained within the first housing.

33. The lancet device of claim 32, wherein the first housing is one of triangular, D-shaped, and polygonal.

34. The lancet device of claim 32, wherein the distal end of the needle holding member comprises a shoulder.

35. A lancet device comprising:

a main housing comprising a proximal end and a distal end;

an inner housing being at least partially disposed in the first housing;

a guide wall arranged at an end of the inner housing;

the guide wall extending transverse to an axis running through the main housing;

the guide wall comprising an opening;

a cap disposed at the proximal end of the main housing;

the cap being removable and having a proximal end for engaging a skin surface;

a movable needle holding member for holding a lancet, the needle holding member being at least partially contained within the main housing;

at least a portion of the needle holding member being able to move within the opening of the guide wall;

a first spring that biases the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member;

the first spring being arranged between the guide wall and a shoulder of the needle holding member;

a trigger arranged on a side wall of the main housing;

the trigger being movable between a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a distal housing comprising a proximal end, a distal end and a guide wall;

the distal housing being configured to move the needle holding member to the retracted position when the distal housing is moved away from the main housing;

the guide wall of the distal housing comprising an opening;

a portion of the needle holding member being able to move within the opening of the guide wall of the distal housing;

the proximal end of the distal housing being configured to move axially within the distal end of the main housing;

a second spring for biasing the distal housing towards the main housing;

a lock retainer mounted to a distal end of the needle holding member; and

the second spring surrounding a distal portion of the needle holding member and being disposed between the guide wall of the distal housing and the lock retainer,

wherein at least a portion of the needle holding member is always retained within the first housing.

36. The lancet device of claim 35, wherein the main housing is one of triangular, D-shaped, and polygonal.

37. The lancet device of claim 35, wherein the distal end of the needle holding member comprises a shoulder.

38. A lancet device comprising:

a main housing comprising an open proximal end and an open distal end;

an inner housing at least partially disposed in the main housing;

a guide wall arranged on the inner housing and within the main housing;

the guide wall comprising an opening;

a removably mounted cap;

the cap having a proximal end for engaging a skin surface;

a movable needle holding member for holding a lancet, the needle holding member being at least partially contained within the main housing;

a portion of the needle holding member being able to move within the opening of the guide wall;

a first spring for biasing the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member;

the first spring being disposed between the guide wall and a shoulder of the needle holding member;

the needle holding member having a proximal end that projects from the open proximal end of the main housing when the needle holding member is in the extended position;

a movable trigger arranged on a side of the main housing;

the trigger being movable between a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a distal housing disposed at the distal end of the main housing;

the distal housing comprising a proximal end, a distal end and a guide wall arranged at the proximal end of the distal housing;

the distal housing being configured to move the needle holding member to the retracted position when the distal housing is moved away from the main housing;

the guide wall of the distal housing comprising an opening;

a portion of the needle holding member being able to move within the opening of the guide wall of the distal housing;

the proximal end of the distal housing being configured to move axially within the distal end of the main housing;

a second spring that biases the distal housing towards the main housing; and

the second spring surrounding a portion of the needle holding member and being disposed between the guide wall of the distal housing and a distal end of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the first housing.

39. The lancet device of claim 38, further comprising a lock retainer mounted to the distal end of the needle holding member.

40. The lancet device of claim 38, wherein the main housing is one of triangular, D-shaped, and polygonal.

41. The lancet device of claim 38, further comprising a distal shoulder arranged at the distal end of the needle holding member.

42. The lancet device of claim 38, wherein the needle holding member comprises a mechanism that cooperates with the trigger to retain the needle holding member in the retracted position.

43. The lancet device of claim 42, wherein the mechanism comprises a shoulder.

44. The lancet device of claim 38, further comprising a fastening mechanism for securing the cap to the main housing.

45. A lancet device comprising:

a first housing comprising a proximal end and a distal end;

a movable trigger arranged on a side wall of the first housing;

a first guide wall disposed within the first housing;

the first guide wall extending transverse to an axis running through the first housing and comprising an opening;

a removably mounted cap for positioning the lancet device relative to a skin surface;

a needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing;

at least a portion of the needle holding member being able to move within the opening of the first guide wall;

a first spring that biases the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member and being disposed between the first guide wall and a shoulder of the needle holding member;

the needle holding member comprising a projecting portion arranged between a proximal end of the needle holding member and the shoulder of the needle holding member;

the projecting portion acting to retain the needle holding member in the retracted position;

the trigger having a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a movable second housing comprising a proximal end, a distal end and a second guide wall arranged at the proximal end of the second housing;

the second guide wall comprising an opening;

a portion of the needle holding member being able to move within the opening of the second guide wall;

the second housing being configured to move the needle holding member to the retracted position when the second housing is moved away from the first housing;

the proximal end of the second housing being configured to move axially within the distal end of the first housing;

a second spring for biasing the second housing towards the first housing; and

the second spring surrounding a portion of the needle holding member and being disposed between the second guide wall and a distal end of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the first housing.

46. A lancet device comprising:

a main housing comprising a proximal end and a distal end;

a movable trigger arranged on a side wall of the first housing;

a guide wall disposed within the first housing;

the guide wall comprising an opening;

a removably mounted cap for positioning the lancet device relative to a skin surface;

a needle holding member for holding a lancet, the needle holding member being at least partially contained within the first housing;

at least a portion of the needle holding member being able to move within the opening of the guide wall;

a first spring that biases the needle holding member toward an extended position;

the first spring surrounding a portion of the needle holding member and being disposed between the guide wall and a shoulder of the needle holding member;

the needle holding member comprising a projecting portion arranged between a proximal end of the needle holding member and the shoulder of the needle holding member;

the projecting portion acting to retain the needle holding member in the retracted position;

the trigger having a first position and a second position, wherein when the trigger is moved to the second position, the needle holding member is allowed to move from a retracted position to an extended position;

a movable distal housing comprising a proximal end, a distal end and a guide wall arranged at the proximal end of the distal housing;

the guide wall of the distal housing comprising an opening;

a portion of the needle holding member being able to move within the opening of the guide wall of the distal housing;

the distal housing being configured to move the needle holding member to the retracted position when the distal housing is moved away from the main housing;

the proximal end of the distal housing being configured to move axially within the distal end of the main housing;

a second spring that biases the second housing towards the first housing; and

the second spring surrounding a portion of the needle holding member and being disposed between the guide wall of the distal housing and a distal end of the needle holding member,

wherein at least a portion of the needle holding member is always retained within the main housing.