Test plug and cable for a glucose monitor

• US 20080057779A1
• Filed: 08/28/2007
• Published: 03/06/2008
• Est. Priority Date: 02/25/1999
• Status: Active Grant

• Current Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Minimed Incorporated (Medtronic Plc)
• Inventors: Johnson, Eric, Halili, Edgardo, Mastrototaro, John, Purvis, Richard
• Granted Patent: US 7,448,916 B2
• Time in Patent Office: Days
• US Class Current: 439/502
• CPC Class Codes: A61B 2562/227 Sensors with electrical connectors
• 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 5/6848 Needles
• CPC Class Codes: A61B 5/6849 in combination with a needle set
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts
• CPC Class Codes: H01B 11/1033 composed of a wire-braided conductor
• CPC Class Codes: H01B 11/1091 with screen grounding means, e.g. drain wires
• CPC Class Codes: H01B 7/361 being the colour of the insulation or conductor
• CPC Class Codes: H01R 11/01 characterised by the form or arrangement of the conductive interconnection between the connecting locations
• CPC Class Codes: H01R 11/18 End pieces terminating in a probe
• CPC Class Codes: H01R 13/5224 for medical use
• CPC Class Codes: H01R 13/6683 with built-in sensor
• CPC Class Codes: H01R 2201/12 for medicine and surgery
• CPC Class Codes: H01R 2201/20 for testing or measuring purposes
• CPC Class Codes: Y10S 439/909 Medical use or attached to human body

Abstract

Methods and apparatuses for electrically connecting a medical glucose monitor to a glucose sensor set, as well as for testing the operation of the glucose monitor, monitor cable and glucose sensor set are provided. In one embodiment, an electric cable comprises a cable member, a first connector and a second connector. The cable member in turn comprises at least one insulated conductor, a conductive shielding layer disposed around the at least one insulated conductor; and an insulating layer disposed around the conductive shielding layer. A glucose monitoring system test plug provides for a releasable electrical connection with the electric cable. In one embodiment, the test plug comprises a housing and a fitting affixed thereto which is adapted to electrically couple the test plug with the electric cable. The test plug further includes an electrical circuit that produces a signal that is read by the glucose monitor to test the operational performance of the glucose monitor and the electric cable when the test plug is coupled to the electric cable and when the electric cable is coupled to the glucose monitor.

Claims

1. A method of electrically connecting a glucose monitor to a glucose sensor, the method comprising:

connecting the glucose monitor to the proximal end of an electric cable comprising;

at least one insulated conductor having a gauge number greater than 29 and a strand count greater than 39;

a conductive shielding layer disposed around the at least one insulated conductor; and

an insulating layer disposed around the conductive shielding layer, the insulating layer being made of a material selected from the group consisting of USP class VI PVC and thermoplastic elastomer and reinforced elastomer, and wherein the insulating layer has an OD of less than 0.110 inches; and

connecting the glucose sensor to the distal end of the electric cable.

2. The method of claim 1 wherein the insulating layer has nominal thickness of greater than 0.005 inches.

3. The method of claim 1 wherein the at least one insulated conductor has an insulation layer made of a material selected from the group consisting of PVC and polyester.

4. The method of claim 1 wherein the electric cable further comprises a drain line conductor disposed within the conductive shielding layer, the drain line conductor being adjacent to and in electrical connection with the conductive shielding layer.

5. A method of electrically connecting a glucose monitor to a glucose sensor set, the method comprising:

connecting a first connector of an electric cable to the glucose sensor set, the electric cable further having a cable member, and a second connector, the glucose sensor set having a sensor set cable fitting and a sensor set conductive contact,

the cable member comprising;

at least one insulated conductor;

a conductive shielding layer disposed around the at least one insulated conductor; and

an insulating layer disposed around the conductive shielding layer;

the first connector comprising;

a first connector housing having a first bore, the first bore adapted to receive the sensor set cable fitting; and

a first conductive contact disposed within the first bore, the first conductive contact being electrically coupled to the at least one insulated conductor, the first conductive contact further being removably electrically coupled to the sensor set conductive contact; and

connecting the second connector to the glucose monitor having a glucose monitor conductive contact, the second connector comprising;

a second connector housing having a second bore, the second connector housing adapted to releasably couple the second connector with the glucose monitor; and

a second conductive contact disposed within the second bore, the second conductive contact being electrically coupled to the at least one insulated conductor, the second conductive contact further being removably electrically coupled to the glucose monitor conductive contact.

6. The method of claim 5 wherein the at least one insulated conductor has a gauge number greater than 29 and has a strand count greater than 39, wherein the insulating layer is made of a material selected from the group consisting of USP class VI PVC and thermoplastic elastomer and reinforced elastomer, and wherein the electric cable has an OD of less than 0.110 inches.

7. The method of claim 5 wherein the first connector further comprises a key fitting formed within the first bore, the key fitting being adapted to mate with the glucose sensor set in one orientation.

8. The method of claim 5 wherein the first connector further comprises a releasable coupler disposed on the first connector housing, the releasable coupler adapted to releasably couple the first connector housing with the glucose sensor set.

9. The method of claim 5 wherein the glucose monitor has a ground contact, and

wherein the cable member further comprises a drain conductor disposed within the conductive shielding layer, and

wherein the second connector further comprises a drain line conductive contact disposed within the second bore, the drain line conductive contact being electrically coupled to the drain conductor, the drain line conductive contact further being adapted to be removably electrically coupled to the glucose monitor ground contact.