Method of setting lancing member to lancing device, lancing device and cam mechanism

• US 20050261716A1
• Filed: 07/01/2003
• Published: 11/24/2005
• Est. Priority Date: 07/02/2002
• Status: Active Grant

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Matsumoto, Daisuke, Sakata, Tetsuya
• Granted Patent: US 7,879,057 B2
• Time in Patent Office: Days
• US Class Current: 606/181
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/1486 using enzyme electrodes, e.g. with immobilised oxidase
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150099 by negative pressure, other than vacuum extraction into a syringe by pulling on the piston rod or into pre-evacuated tubes
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• 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 5/150618 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 5/150725 removal procedure linked to further actions, e.g. cocking of the piercing device, which indicate that the piercing device is used or tempered
• CPC Class Codes: A61B 5/150732 Needle holders, for instance for holding the needle by the hub, used for example with double-ended needle and pre-evacuated tube,
• CPC Class Codes: A61B 5/150755 Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
• 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 5/1519 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 member (2) is integrally provided with a cap (29) for covering a needle (21). Upon or after being attached to a holder (5) of a lancing device (A), the lancing member (2) is rotated relative to a cap (29) by a rotator (C). As a result, the boundary (28) between the cap (29) and the lancing member (2) is broken easily to expose the needle (21).

Claims

1. A method of setting a lancing member to a lancing device, the method comprising:

a first step for causing a lancing member formed integral with a cap covering a needle to be held by a holder of a lancing device; and

a second step for breaking a boundary between the cap and the lancing member by rotating the lancing member relative to the cap utilizing a rotating means prearranged at the lancing device, the second step performed during or after the first step.

2. The method according to claim 1, further comprising a third step for exposing the needle by detaching the cap from the lancing member after the second step.

3. The method according to claim 1, wherein the lancing device comprises a housing including a tip end formed with an opening, the holder being reciprocally movable in the housing, and

wherein the rotating means comprises a cam mechanism for rotating the holder and the lancing member utilizing a pressing force exerted when the holder is pressed into the housing by the lancing member.

4. The method according to claim 3, wherein the lancing member is held by a supporting member including a sheath, and

wherein in the first step, the sheath is slidably fitted to an end of the housing, the lancing member being pressed against the holder to be pushed into the housing.

5. The method according to claim 4, wherein the supporting member holds an analyzer, and

wherein in the first step, the analyzer is attached to the lancing device when the lancing member is held by the holder.

6. The method according to claim 1, wherein the rotating means comprises a motor, and wherein in the second step, the lancing member is rotated by driving force of the motor.

7. A lancing device comprising:

a holder for holding a lancing member;

a moving mechanism for advancing the holder in a predetermined direction; and

rotating means for rotating the lancing member when the lancing member is about to be held by the holder or after the lancing member is held by the holder.

8. The lancing device according to claim 7, wherein the holder holds the lancing member in a manner such that the holder and the lancing member are not rotatable relative to each other,

wherein the rotating means rotates the holder together with the lancing member.

9. The lancing device according to claim 8, wherein the rotating means comprises a cam mechanism for rotating the holder when the holder retracts in a direction opposite to the predetermined direction.

10. The lancing device according to claim 9, further comprising a cylindrical housing that contains the holder therein and includes a tip end formed with an opening,

wherein the cam mechanism includes a first groove which is provided at one of the housing and the holder and is inclined relative to a longitudinal axis of the housing, and also includes a protrusion which is provided at the other one of the housing and the holder and is fitted in the first groove.

11. The lancing device according to claim 10, wherein the cam mechanism further includes a second groove connected to the first groove and extending in parallel to the axis of the housing, and

wherein the protrusion passes through the second groove when the holder advances.

12. The lancing device according to claim 8, wherein the rotating means comprises a motor and a member for transmitting rotating force of the motor to the holder.

13. The lancing device according to claim 7, further comprising a holding portion for removably holding an analyzer used for analyzing a sample taken by piercing process.

14. The lancing device according to claim 13, further comprising a control circuit for analyzing the sample using the analyzer.

15. A cam mechanism comprising:

a cylindrical housing;

a movable member contained in the housing for moving reciprocally in first and second directions parallel to a longitudinal axis of the housing;

a first groove inclined relative to the axis of the housing and a second groove connected to the first groove and extending linearly in parallel to the axis of the housing, the first and the second grooves being provided at one of the housing and the movable member; and

a protrusion provided at the other one of the housing and the movable member, the protrusion extending into the first groove and the second groove;

wherein the protrusion moves in the first groove when the movable member moves in the first direction, and moves in the second groove when the movable member moves in the second direction.