Collar lancet device

• US 5,628,764 A
• Filed: 03/21/1995
• Issued: 05/13/1997
• Est. Priority Date: 03/21/1995
• Status: Expired due to Term

• Current Assignee: Stat Medical Devices Incorporated
• Original Assignee: Stat Medical Devices Incorporated
• Inventors: Schraga, Steven
• Primary Examiner(s): Tucker, Guy V.
• Assistant Examiner(s): RASCHE, PATRICK WILLIAM
• Application Number:
  US08/407,758
• Time in Patent Office: 784 Days
• Field of Search: 606/182, 606/181, 606/167, 606/170, 606/183
• 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 5/150519 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 5/150564 Protectors removed by pulling or pushing
• 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 5/15113 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 5/15194 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

An improved collar lancet device having a lancet housing with an open first end and a plunger element contained within the housing such that a receiving end slides towards the open first end in such a manner as to be urged into a piercing orientation wherein the receiving end protrudes up to a maximum amount from the lancet housing upon triggered firing thereof. Further, the lancet device includes a disposable cap element including a lancet contained in a sheathed relation by a cap body structured for secure yet removable fitted engagement on the lancet housing, the lancet contained therein being structured for engagement within the receiving end of the plunger element such that when the plunger element moves to its piercing orientation a tip of a piercing member of the lancet protrudes from an aperture in the top end of the cap body before retracting to concealed orientation within the cap body. Further, the lancet and cap body are engaged with one another such that they cannot be removed from one another yet the lancet is able to slide relative to the cap body, and upon removal of the cap body from its fitted position atop the lancet housing the cap body will be locked into a sheathed orientation over the lancet, thereby preventing further repeated use of the used and possibly contaminated lancet contained therein.

Claims

1. An improved collar lancet device comprising:

(a) a lancet housing, said lancet housing including a generally open first end,

(b) a plunger element slidably disposed in said lancet housing, said plunger element including a receiving end structured and disposed to move towards said generally open end of said lancet housing,

(c) firing means structured and disposed to rapidly and momentarily urge said plunger element into a piercing orientation wherein said receiving end of said plunger element moves a maximum amount through said generally open end of said lancet housing,

(d) triggering means structured and disposed to initiate the action of said firing means, and

(e) a disposable cap element structured to be removably secured on said generally open end of said lancet housing, said disposable cap element comprising;

a lancet, said lancet including a generally elongate body with a distal end and a proximal end,

said lancet further including a piercing member extending from said distal end of said generally elongate body,

a cap body disposed in sheathing relation over said lancet, said cap body including a top end, a substantially open bottom end and surrounding side wall structure,

said open bottom end of said cap body being structured for secure, yet removable fitted engagement on said generally open first end of said lancet housing such that said cap body substantially encloses said plunger element,

said top end of said cap body including an aperture disposed therein which is structured and disposed to permit passage of a tip of said piercing member of said lancet therethrough,

said proximal end of said elongate body of said lancet being structured for secure, fitted engagement in said receiving end of said plunger element such that upon said receiving end of said plunger element being momentarily urged into said piercing orientation said tip of said piercing member of said lancet extends momentarily through said aperture in said top end of the said cap body before retracting to a concealed orientation within said cap body,

engagement means disposed between said generally elongate body of said lancet and an interior of said surrounding side wall structure of said cap so as to maintain said lancet slidably secured to said cap body,

said engagement means including at least one guide element having first fixedly secured end and a second slidable guide end, and

lock means structured and disposed to immovably captivate said second slidable guide end of said guide element upon pulled removal of said cap body from said secure, yet removable fitted engagement on said generally open first end of said lancet housing, thereby preventing further slided movement of said lancet relative to said cap body and retaining said lancet in a sheathed orientation in said cap body.

2. An improved lancet device as recited in claim 1 wherein said disposable cap element further includes a protective element removably disposed in covering relation on said tip of said piercing end of said lancet and protruding through said aperture in said top end of said cap body so as to facilitate preliminary positioning of said proximal end of said elongate body of said lancet in said receiving end of said plunger element.

3. An improved lancet device as recited in claim 1 wherein said first end of said guide element is fixedly secured to said generally elongate body of said lancet and said second end of said guide element is slidably disposed in at least one guide track disposed in said interior of said surrounding side wall structure of said cap body.

4. An improved lancet device as recited in claim 3 wherein said locking means includes a recess disposed at a bottom end of said guide track in said interior of said surrounding side wall structure of said cap body, said recess being structured to securely and non-removably receive said second end of said guide element therein, upon pulled removal of said cap body from said secure, yet removable fitted engagement on said generally open first end of said lancet housing, thereby preventing movement of said lancet towards said top end of said cap body.

5. An improved lancet device as recited in claim 4 including at least two of said guide elements extending from opposite sides of said generally elongate body of said lancet into a corresponding one of at least two of said guide tracks disposed on opposite sides of said interior of said surrounding side wall structure of said cap body.

6. An improved lancet device as recited in claim 1 wherein said guide element includes a guide collar structured and disposed such that said first end of said guide element is fixedly secured to said generally elongate body of said lancet and said second end of said guide element is slidably disposed along said interior of said surrounding wall structured of said cap body.

7. An improved lancet device as recited in claim 1 wherein said first end of said guide element is fixedly secured to said interior of said surrounding wall structure of said cap body and said second end of said guide element is slidably disposed in at least one guide track disposed on an exterior of said generally elongate body of said lancet.

8. An improved lancet device as recited in claim 7 wherein said locking means includes a recess disposed at a bottom end of said guide track on said exterior of said generally elongate body of said lancet, said recess being structured to securely and non-removably receive said second end of said guide element therein, upon pulled removal of said cap body from said secure, yet removable fitted engagement on said generally open first end of said lancet housing, thereby preventing movement of said lancet towards said top end of said cap body.

9. An improved lancet device as recited in claim 8 including at least two of said guide elements extending from opposite sides of said interior of said surrounding side wall structure of said cap body into a corresponding one of at least two of said guide tracks disposed on opposite sides of said generally elongate body of said lancet.

10. An improved lancet device as recited in claim 1 wherein said guide element includes a guide collar structured and disposed such that said first end of said guide element is fixedly secured to said interior of said surrounding wall structure of said cap body and said second end of said guide element is slidably disposed along an exterior of said generally elongate body of said lancet.

11. A disposable lancet cap element to be used with a lancet device having a lancet housing, said lancet housing including a generally open first end, a plunger element slidably disposed in said lancet housing, said plunger element including a receiving end structured and disposed to move towards said generally open end of said lancet housing, firing means structured and disposed to rapidly urge said plunger element into a piercing orientation wherein said receiving end of said plunger element moves a maximum amount through said generally open end of said lancet housing, and triggering means structured and disposed to initiate the action of said firing means, said disposable lancet cap element comprising:

a lancet, said lancet including a generally elongate body with a distal end and a proximal end,

said lancet further including a piercing member extending from said distal end of said generally elongate body,

a cap body disposed in sheathing relation over said lancet, said cap body including a top end, a substantially open bottom end, and a surrounding side wall structure,

said open bottom end of said cap body being structured for secure, yet removable fitted engagement on said generally open first end of said lancet housing such that said cap body substantially encloses said plunger element,

said top end of said cap body including an aperture disposed therein which is structured and disposed to permit passage of a tip of said piercing member of said lancet therethrough,

said proximal end of said elongate body of said lancet being structured for engagement with said receiving end of said plunger element such that upon said receiving end of said plunger element being urged into said piercing orientation said tip of said piercing member of said lancet extends through said aperture in said top end of said cap body,

engagement means disposed between said generally elongate body of said lancet and an interior said surrounding side wall structure of said cap body so as to maintain said lancet slidably secured to said cap body,

said engagement means including at least one guide element having a first fixedly secured end and a second slidable guide end, and

locking means structured and disposed to immovably captivate said second slidable guide end of said guide element upon pulled removal of said cap body from said secure, yet removable fitted engagement on said generally open end of said lancet housing, thereby preventing further slided movement of said lancet relative to said cap body and retaining said lancet in a sheathed orientation in said cap body.

12. A disposable lancet cap element as recited in claim 11 wherein said first end of said guide element is fixedly secured to said generally elongate body of said lancet and said second end of said guide element is slidably disposed in at least one guide track disposed in said interior of said surrounding side wall structure of said cap body.

13. A disposable lancet cap element as recited in claim 12 wherein said locking means includes a recess disposed at a bottom end of said guide track in said interior of said surrounding side wall structure of said cap body, said recess being structured to securely and non-removably receive said second end of said guide element therein, upon pulled removal of said cap body from said secure, yet removable fitted engagement on said generally open first end of said lancet housing, thereby preventing movement of said lancet towards said top end of said cap body.

14. A disposable lancet cap element as recited in claim 13 including at least two of said guide elements extending from opposite sides of said generally elongate body of said lancet into a corresponding one of at least two of said guide tracks disposed on opposite sides of said interior of said surrounding side wall structure of said cap body.

15. A disposable lancet cap element as recited in claim 11 wherein said guide element includes a guide collar structured and disposed such that said first end of said guide element is fixedly secured to said generally elongate body of said lancet and said second end of said guide element is slidably disposed along said interior of said surrounding wall structured of said cap body.

16. A disposable lancet cap element as recited in claim 11 wherein said first end of said guide element is fixedly secured to said interior of said surrounding wall structure of said cap body and said second end of said guide element is slidably disposed in at least one guide track disposed on an exterior of said generally elongate body of said lancet.

17. A disposable lancet cap element as recited in claim 16 wherein said locking means includes a recess disposed at a bottom end of said guide track on said exterior of said generally elongate body of said lancet, said recess being structured to securely and non-removably receive said second end of said guide element therein, upon pulled removal of said cap body from said secure, yet removable fitted engagement on said generally open first end of said lancet housing, thereby preventing movement of said lancet towards said top end of said cap body.

18. A disposable lancet cap element as recited in claim 17 including at least two of said guide elements extending from opposite sides of said interior of said surrounding side wall structure of said cap body into a corresponding one of at least two of said guide tracks disposed on opposite sides of said generally elongate body of said lancet.

19. A disposable lancet cap element as recited in claim 11 wherein said guide element includes a guide collar structured and disposed such that said first end of said guide element is fixedly secured to said interior of said surrounding wall structure of said cap body and said second end of said guide element is slidably disposed along an exterior of said generally elongate body of said lancet.

20. A disposable lancet cap element as recited in claim 11 further including depth adjustment means structured and disposed to vary an amount which said tip of said piercing member of said lancet protrudes through said aperture in said top end of said cap body.