Analyte sensor retention mechanism and methods of use

• US 20070078321A1
• Filed: 09/30/2005
• Published: 04/05/2007
• Est. Priority Date: 09/30/2005
• Status: Active Grant

• Current Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories)
• Original Assignee: Abbott Diabetes Care Incorporated (Abbott Laboratories)
• Inventors: Mazza, John, Naegeli, Andrew
• Granted Patent: US 9,521,968 B2
• Time in Patent Office: Days
• US Class Current: 600/347
• CPC Class Codes: A61B 2560/063 Devices specially adapted for delivering implantable medical measuring apparatus
• CPC Class Codes: A61B 5/0002 Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network A61B5/07 takes precedence; transmission systems for measured values G08C; transmission H04B; transmission of digital information H04L; wireless communication networks H04W
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/14546 for measuring analytes not otherwise provided for, e.g. ions, cytochromes
• CPC Class Codes: A61B 5/1468 using chemical or electrochemical methods, e.g. by polarographic means A61B5/1486 takes precedence
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence

Abstract

Method and apparatus for providing a retention mechanism to retain the sensor in pre-deployment position within the introducer when the sensor insertion mechanism is activated so as to facilitate the sensor insertion process is disclosed.

Claims

1. An apparatus including a biosensor, comprising:

a sensor body including a retention segment on the sensor body so as to protrude from a planar surface of the sensor body.

2. The apparatus of claim 1 further including an introducer, the introducer configured to engage with the retention segment of the sensor body.

3. The apparatus of claim 2 wherein the retention segment is configured to frictionally engage with the introducer so as to retain the sensor body in position with respect to the introducer prior to sensor insertion into a patient.

4. The apparatus of claim 2 wherein the introducer includes a tip portion configured to substantially retain at least a portion of the sensor body.

5. The apparatus of claim 4 wherein the tip portion of the introducer is configured to pierce through a skin of a patient.

6. The apparatus of claim 5 wherein when the skin of the patient is pierced with the tip portion of the introducer, the at least the portion of the sensor is substantially retained within the tip portion of the introducer and displaced into the skin of the patient.

7. The apparatus of claim 1 wherein the sensor includes an analyte sensor.

8. The apparatus of claim 7 wherein the analyte sensor is a glucose sensor.

9. The apparatus of claim 1 wherein the at least the portion of the sensor body is configured to be in fluid contact with a biological fluid of a patient.

10. The apparatus of claim 9 wherein the biological fluid of the patient includes interstitial fluid.

11. An insertion kit, comprising:

a sensor including a retention segment, the retention segment disposed substantially on a surface of the sensor;

an introducer configured to engage with the sensor, the introducer further configured to frictionally engage with the retention segment of the sensor; and

a drive mechanism configured to operatively engage with the introducer to pierce through a skin of a patient, the introducer configured to substantially retain the sensor when driven through the skin of the patient, the drive mechanism further configured to position at least a portion of the sensor in fluid contact with a biological fluid of the patient.

12. The insertion kit of claim 11, wherein the drive mechanism further includes a retraction mechanism configured to substantially completely withdraw the introducer from the patient after the sensor is transcutaneously positioned in fluid contact with the biological fluid of the patient.

13. The insertion kit of claim 11 wherein the drive mechanism includes a spring biased mechanism.

14. The insertion kit of claim 11 wherein the retention segment of the sensor is configured to apply a predetermined frictional force upon the introducer prior to transcutaneous insertion of the sensor such that the sensor is retained in position prior to insertion, and further, wherein the retraction mechanism is configured to substantially completely counter the predetermined frictional force so as to withdraw the introducer from the patient without the sensor.

15. An analyte sensor, comprising:

an introducer retention segment for frictional engagement with an analyte sensor introducer.

16. The sensor of claim 15 wherein the retention segment includes a protrusion

17. The sensor of claim 15 wherein the segment is a groove

18. A method, comprising the step of:

retaining an analyte sensor within an introducer during the sensor insertion into a patient such that the sensor is positioned at a relatively fixed position with respect to the introducer.

19. The method of claim 18 further including the step of:

positioning the analyte to be in fluid contact with a biological fluid of a patient.

20. The method of claim 19 wherein the biological fluid includes one of an interstitial fluid and blood.