Lancet sensor assembly and meter

• US 20100191149A1
• Filed: 04/12/2010
• Published: 07/29/2010
• Est. Priority Date: 07/26/2004
• Status: Active Grant

• Current Assignee: Avi M. Robbins, Chris Ruf, Garland O'Connell, James Fowler, James S. Sidwell, Jeffrey T. Stout, Robert Daggett
• Original Assignee: Avi M. Robbins, Chris Ruf, Garland O'Connell, James Fowler, James S. Sidwell, Jeffrey T. Stout, Robert Daggett
• Inventors: Stout, Jeffrey T., Robbins, Avi M., Fowler, James, Daggett, Robert, O'Connell, Garland, Sidwell, James S., Ruf, Chris
• Granted Patent: US 7,972,281 B2
• Time in Patent Office: Days
• US Class Current: 600/583
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• 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 5/150213 Venting means
• 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 5/150458 Specific blade design, e.g. for improved cutting and penetration characteristics
• CPC Class Codes: A61B 5/150465 Specific design of proximal end
• 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 5/1519 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 method of obtaining a test sample from a specimen using a lancet system includes engaging a lancet driver against a drive wing of a lancet system, the lancet system having a major portion of a lancet member slidably engaged within a lancet carrier and a sensor strip with a sample chamber attached to the lancet carrier, the lancet system having a lance connected to a first end of a lancet body of the lancet member wherein the lance is movable from a retracted position within the lancet carrier to an extended position outside the lancet carrier, the drive wing extending outwardly and transversely from the lancet body, the major portion of the lancet member having a sinuous portion with a distal end restricted from movement by the lancet carrier, the sinuous portion being non-compressible when initially disposed within the lancet carrier wherein the drive wing prevents the sinuous portion from being compressed, moving the drive wing with the lancet driver a predetermined distance causing the lancet tip to move from the retracted position to the extended position, and disengaging the lancet driver from the drive wing, the lance being automatically moved from the extended position to the retracted position.

Claims

1. A method of obtaining a test sample from a specimen using a lancet system comprising:

engaging a lancet driver against a drive wing of a lancet system, the lancet system having a major portion of a lancet member slidably engaged within a lancet carrier and a sensor strip with a sample chamber attached to the lancet carrier, the lancet system having a lance connected to a first end of a lancet body of the lancet member wherein the lance is movable from a retracted position within the lancet carrier to an extended position outside the lancet carrier, the drive wing extending outwardly and transversely from the lancet body, the major portion of the lancet member having a sinuous portion with a distal end restricted from movement by the lancet carrier, the sinuous portion being non-compressible when initially disposed within the lancet carrier wherein the drive wing prevents the sinuous portion from being compressed;

moving the drive wing with the lancet driver a predetermined distance causing the lancet tip to move from the retracted position to the extended position; and

disengaging the lancet driver from the drive wing, the lance being automatically moved from the extended position to the retracted position.

2. The method of claim 1 further comprising massaging the lanced specimen to generate a sample sufficient for disposing within a sample chamber of a sensor strip connected to the lancet carrier and moving the sensor strip to the sample for receiving a portion of the sample within the sample chamber.

3. The method of claim 1 further comprising arming the lancet driver before engaging the drive wing.

4. A method of measuring blood glucose using a lancet system comprising a portable meter and a lancet assembly, the method comprising:

charging a lancet driver to an armed positioned wherein the lancet driver is incorporated within the portable meter;

inserting a lancet assembly into a lancet assembly port on the meter until the lancet assembly engages a test strip connector within the meter and electrically contacting a sensor strip of the lancet assembly, the lancet assembly having a lancet member that includes a lancet body with a drive wing extending outwardly from a side of the lancet body, a lance connected to one end of the lancet body, and a sinuous portion connected to the other end of the lancet body wherein a major portion of the lancet member is adapted to slide the lance between an unexposed position and an exposed position, the sinuous portion being non-compressible when initially disposed within the lancet carrier wherein the drive wing prevents the sinuous portion from being compressed;

positioning the exposed end of the lancet assembly against a user'"'"'s skin;

activating the lancet driver causing a lance in the lancet assembly to lance the user'"'"'s skin;

moving the lancet system away from the lanced site;

massaging the patient'"'"'s skin near the lanced site to express a quantity of blood; and

applying a portion of the expressed quantity of blood to a sample inlet on the sensor strip of the lancet assembly.

5. The method of claim 4 further comprising adjusting a lancing depth control of the portable meter to a selectable depth setting.