Lancet device

• US 20030220663A1
• Filed: 05/22/2002
• Published: 11/27/2003
• Est. Priority Date: 05/22/2002
• Status: Abandoned Application

• Current Assignee: Henry H. Fletcher, Ratan K. Bajaj, Scott T. Kaminski
• Original Assignee: Henry H. Fletcher, Ratan K. Bajaj, Scott T. Kaminski
• Inventors: Bajaj, Ratan K., Kaminski, Scott T., Fletcher, Henry H.
• Application Number:
  US10/154,087
• Publication Number:
  US 20030220663A1
• 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 5/150068 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• CPC Class Codes: A61B 5/150114 by tissue compression, e.g. with specially designed surface of device contacting the skin area to be pierced
• 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 5/150519 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 5/150748 Having means for aiding positioning of the piercing device at a location where the body is to be pierced means for aiding positioning of devices for bringing media into the body A61M5/427, locating blood vessels A61B5/489
• CPC Class Codes: A61B 5/150885 Preventing re-use
• 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 5/15142 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 for drawing blood from a digit of a patient. The lancet device is particularly directed to a disposable, pre-armed or armable device including an element for constricting the finger or digit of a patient or user from which the blood is to be drawn. The device includes a portion that functions in a tourniquet manner to increase the blood supply in the area where the lancet is to create an incision. The lancet portion and the structure of the device are designed to produce a substantially painless incision in the patient. The biasing elements of the device provide for forcing the lancet portion toward the target area and for retrieving the lancet into the device after an incision has been made. After use in making an incision, the parts of the device that contact the patient'"'"'s blood are withdrawn from possible inadvertent contact thus avoiding a chance of contamination of the user with the patient'"'"'s blood.

Claims

1. A lancet device for drawing blood from a target area of a digit, said lancet device comprising:

an outer sleeve;

means for constraining the digit relative to said outer sleeve;

an inner sleeve movably disposed relative to said outer sleeve;

a depressible lanceted plunger, said inner sleeve coaxially interposed between said outer sleeve and said lanceted plunger;

means for releasably engaging said lanceted plunger with said inner sleeve; and

means for biasing said lanceted plunger relative to said inner sleeve.

2. The lancet device of claim 1 wherein said means for biasing said lanceted plunger relative to said inner sleeve comprises means for propelling said lanceted plunger toward the target area for making an incision therein responsive to said lanceted plunger being depressibly disengaged from said inner sleeve and means for automatically retracting said lanceted plunger from the target area once the incision has been made.

3. The lancet device of claim 2 further including means for increasing blood supply to the target area, said means for increasing blood supply disposed at the distal end of said inner sleeve and responsive to the digit being compreseed between said means for constraining the digit and said inner sleeve.

4. The lancet device of claim 3 further including means for guiding said inner sleeve relative to said means for constraining the digit.

5. The lancet device of claim 4 further including means for gripping said outer sleeve.

6. The lancet device of claim 3 further including means for gripping said outer sleeve.

7. The lancet device of claim 2 further including means for biasing said inner sleeve relative to said outer sleeve.

8. The lancet device of claim 7 further including means for increasing blood supply to said target area, said means for increasing blood supply disposed at the distal end of said inner sleeve and responsive to the digit being compressed between said means for constraining the digit and said inner sleeve.

9. The lancet device of claim 8 further including means for guiding said inner sleeve relative to said means for constraining the digit.

10. The lancet device of claim 9 further including means for gripping said outer sleeve.

11. The lancet device of claim 8 further including means for gripping said outer sleeve.

12. A lancet device for drawing blood from a target area of a digit, said lancet device comprising:

an outer sleeve;

a digit-constraining member fixed relative to said outer sleeve;

an inner sleeve movably disposed relative to said outer sleeve;

a depressible lanceted plunger configured to releasably engage said inner sleeve, said inner sleeve coaxially interposed between said outer sleeve and said lanceted plunger; and

a first biasing element coupled to said lanceted plunger.

13. The lancet device of claim 12 wherein said first biasing element is adapted to propel said lanceted plunger toward the target area for making an incision therein responsive to said lanceted plunger being depressible disengaged form said inner sleeve, said first biasing element adapted to automatically retract said lanceted plunger from the target area once the incision has been made.

14. The lancet device of claim 13 wherein said first biasing element is coupled to said inner sleeve.

15. The lancet device of claim 13 further including at least one tissue-displacing element disposed at the distal end of said inner sleeve, said at least one tissue-displacing element configured to increase blood supply to the target area responsive to the digit being compressed between said digit-constraining member and said inner sleeve.

16. The lancet device of claim 15 further including a guide fixed relative to said inner sleeve, said guide movably engaging said digit-constraining member.

17. The lancet device of claim 15 further including at least one grip fixed relative to said outer sleeve.

18. The lancet device of claim 15 further including at least one grip fixed relative to said outer sleeve.

19. The lancet device o f claim 13 further including a second biasing element longitudinally interposed between said outer sleeve and said inner sleeve.

20. The lancet device of claim 19 wherein said second biasing element is coupled to said inner sleeve.

21. The lancet device of claim 19 further including at least one tissue-displacing element disposed at the distal end of said inner sleeve, said at least one tissue-displacing element configured to increase blood supply to the target area responsive to the digit being compressed between said digit-constraining member and said inner sleeve.

22. The lancet device of claim 21 further including a guide fixed relative to said inner sleeve, said guide movably engaging said digit-constraining member.

23. The lancet device of claim 22 further including at least one grip fixed relative to said outer sleeve.

24. The lancet device of claim 21 further including at least one grip fixed relative to said outer sleeve.