Non-invasive measurement of blood glucose level

• US 20050065416A1
• Filed: 10/31/2002
• Published: 03/24/2005
• Est. Priority Date: 10/31/2001
• Status: Active Grant

• Current Assignee: Iris Medical Technologies International Ltd.
• Original Assignee: Iris Medical Technologies International Ltd.
• Inventors: Subotics, Gyula
• Granted Patent: US 7,155,268 B2
• Time in Patent Office: Days
• US Class Current: 600/319
• CPC Class Codes: A61B 3/066 for testing colour vision
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement

Abstract

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° 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.

Claims

1. The invention relates to a blood-glucose level measuring device enclosed in a box (19) that can be opened and closed, respectively, that has a cover (39) provided with two openings (9, 12) covered with some transparent material and is made preferably of dye-cast plastic, characterized by that at least two test cards (1, 2) are arranged at specified distances and specified positions within the box (19), and at least one illuminator (17) is built in the box preferably in front of a conical reflecting surface (18);

in order to enable the diffuse beam that is generated by the illuminator, reflected from the inner surface of the closed box (19) to illuminate the two test cards (1, 2) and reflected from one of the test cards (1) to fall on the sensing receptors of the eye (6), the box (19) is provided with an opening (12) covered preferably with some transparent material, while in order to enable the part of diffuse beam (4) reflected from the other test card (2) made parallel preferably within 10°

to fall on the sensing receptors of the eye (5), the box is provided with a tubular prism (10) that is covered with a closing plate (7) with an opening (8) at the one end while having an opening (9) covered with some preferably transparent material at the other end.

3. Blood glucose level measuring device as in claim 1, characterized by that the test strips out of use during the blood-glucose level measurement are covered by two cover plates (23, 24) in order to eliminate their disturbing effects.

4. Blood glucose level measuring device as in claim 1, characterized by that, during the use of the blood-glucose level measuring device, the pupil distance of eyes can be adjusted by means of a sliding plate (13).

5. Blood glucose level, measuring device as in claim 1, characterized by that the illuminator (17) of the blood-glucose level measuring device is actuated by a micro switch (29) that is mounted between two springs (28, 30) fastened to the base plate of the box (19) and fastened preferably to the upper spring (30) when the turn knob (25) is rotated.

6. Blood glucose level measuring device as in claim 1, characterized by that that the diameter D1 of the preferably circular opening (8) arranged on the closing plate (7) of the tubular prism (10) is of up to 2 mm, while the diameter D2 of the preferably circular opening (9) covered with some transparent material as well as the diameter D4 of the preferably circular opening (12) arranged on the slide plate (13) and covered with some transparent material are less than 10 mm each, and the diameter D3 of the tubular prism (10) is greater than or equal to the diameter D2.

7. Blood glucose level measuring device as in claim 1, characterized by that the distances between the opening (9,12) covered with transparent material and the test card, (1,2) are equal, that is L2=L3 and preferably, L2<

200 mm and L3<

200 mm and the length of the tubular prism (10) is preferably larger than 10 mm.

8. Blood glucose level measuring device as in claim 1, characterized by that the internal illumination is ensured by a glow lamp (42) under the effect of operating a push-button switch (43), or a rotating switch (44) and the illumination is active for a pre-determined time and, following this period, the illumination is disabled for a specified time the readiness of the device to be switched on again is indicated by and indicator lamp (45);

furthermore, the switching the device OFF and ON will be ensured by a general switch (52).

9. Blood glucose level measuring device as in claim 1, characterized by that it is provided with a voltage indicator (53).

10. Blood glucose level measuring device as in claim 1, characterized by that it is provided with a connector (51) for recharging the battery.

2. Blood-glucose level measuring device as in claim 11 characterized by that the test cards (1, 2, 22, 22′

) paired appropriately are fastened on the sides of a regular polygonal prism (21) that can be rotated within the blood-glucose level measuring device;

a positioning spring (28) holds the prism in its proper position and the blood glucose level value is indicated by the blood glucose indicator (27) on the dial (26) of the turn-knob (25).