Blood glucose levels of a person are determined by a device which provides a light pattern which varies in regard to one or several parameters defining its luminance, color, rate of flicker, spatial contrast, detail content, speed or otherwise provided that the pattern has first and second appearances and can be shifted from one appearance to the other by changing one or more parameters. A person observes the light pattern and a subjective visual effect which correlates with a corresponding blood glucose level. Thus, the person's glucose level is accurately determined in a completely non-invasive manner.
This application is a continuation-in-part of U.S. Ser. No. 08/634,849, filed Apr. 19, 1996 now U.S. Pat. No. 5,713,353, incorporated herein by reference in full.
A non-invasive device for measuring blood glucose levels comprises an enclosure with a cover and dual openings, wherein the enclosure is covered with a transparent material (e.g., glass or plastic); at least two test cards arranged at specified distances and positioned within the enclosure; an illuminator and a conical light reflecting surface for casting a beam on the test cards. Light from one test card is reflected through one of the dual openings to sensing receptors of one eye. In order to enable the part of a diffuse beam reflected from the second test card made parallel within 10.degree. to fall on the sensing receptors of the second eye, the enclosure is provided with a tubular prism covered with a closing plate having an opening at a first end while having an opening covered preferably with transparent material at a second end.
A flicker sensitivity distribution measuring method is provided to maintain a subject in a fixation state and to accurately measure flicker sensitivity distribution. The sensitivity distribution measuring method includes the steps of displaying a target on a screen of a display while changing high and low luminances of a flickering target stepwise so that the average of the high luminance and the low luminance in each cycle of flickering of the target is always equal to the luminance of the screen serving as a background for the target, and determining a flicker sensitivity on the basis of the high luminance and the low luminance in one cycle of flickering of the target at a moment when the target is perceived.
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.
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.
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.
