US4538616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blood sugar level sensing and monitoring transducer
Assignee: Individual
•
Filing: 1983-07-25
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Granted: 1985-09-03
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Expires: 2003-07-25
Abstract
Abstract A sensing and monitoring transducer for detecting blood sugar levels of a person, the transducer being in the form of a miniature enclosure implanted in the person's bloodstream. The enclosure has a chamber, filled with a standard osmostic solution, closed on one side by an osmostic semi-permeable membrane and at another end by a flexible impermeable diaphragm carrying an electrical contact. Transfer of fluid from the chamber containing the standard osmostic solutions through the semi-permeable membrane as a function of variations in blood sugar level causes the flexible diaphragm to be deflected in one direction or the other for placing the electric contact carried by the diaphragm in engagement with one or the other of a pair of fixed electrical contacts, such as to remotely operate appropriate peripheral equipment such as low and high blood sugar level alarms, or insulin and glucose pumps injecting respectively a dosage of insulin and of a glucose solution in the person's bloodstream to maintain the blood sugar level within acceptable limits.
Inventors
- 👤 Robert Rogoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:38
CPC Classifications
A; A61; A61M; A61M5/00; A61M5/14; A61M5/168; A61M5/172; A61M5/1723; A61B; A61B5/00; A61B5/145; A61B5/14532
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
164 words
A blood glucose sensor and monitor transducer comprising an enclosure implantable in the bloodstream of a person, an imperforate impermeable flexible diaphragm disposed in said enclosure and separating said enclosure into a first chamber open to the bloodstream and a second chamber, an osmostic semi-permeable membrane separating said second chamber from the bloodstream, a first electrical contact mounted on said diaphragm, a second electrical contact fixedly mounted in said first chamber and a third electrical contact fixedly mounted in said second chamber, and an osmostic solution filling said second chamber, whereby variations in glucose level of the blood in the bloodstream causing variations in osmostic pressure of the blood causes transfer of liquid fluid from and into said second chamber through said semi-permeable membrane deflecting said flexible diaphragm in one direction and in an opposite direction causing said first electrical contact on said flexible diaphragm to engage said second or third fixed electrical contact according to the direction of deflexion of said flexible diaphragm.
Claim 2
Dependent Claim
164 words
A blood glucose sensor and monitor transducer comprising an enclosure implantable in the bloodstream of a person, an imperforate impermeable flexible diaphragm disposed in said enclosure and separating said enclosure into a first chamber open to the bloodstream and a second chamber, an osmostic semi-permeable membrane separating said second chamber from the bloodstream, a first electrical contact mounted on said diaphragm, a second electrical contact fixedly mounted in said first chamber and a third electrical contact fixedly mounted in said second chamber, and an osmostic solution filling said second chamber, whereby variations in glucose level of the blood in the bloodstream causing variations in osmostic pressure of the blood causes transfer of liquid fluid from and into said second chamber through said semi-permeable membrane deflecting said flexible diaphragm in one direction and in an opposite direction causing said first electrical contact on said flexible diaphragm to engage said second or third fixed electrical contact according to the direction of deflexion of said flexible diaphragm.
Claim 3
Dependent Claim
21 words
The transducer of claim 1 wherein a low blood sugar level alarm is connected across said first and second electrical contact.
Claim 4
Dependent Claim
21 words
The transducer of claim 1 wherein a high blood sugar level alarm is connected across said first and third electrical contacts.
Claim 5
Dependent Claim
27 words
The transducer of claim 1 wherein a pump is connected across said first and second electrical contacts, said pump being adapted to inject glucose into the bloodstream.
Claim 6
Dependent Claim
27 words
The transducer of claim 2 wherein a pump is connected across said first and second electrical contacts, said pump being adapted to inject glucose into the bloodstream.
Claim 7
Dependent Claim
27 words
The transducer of claim 1 wherein a pump is connected across said first and third electrical contacts, said pump being adapted to inject insulin into the bloodstream.
Claim 8
Dependent Claim
27 words
The transducer of claim 3 wherein a pump is connected between said first and third electrical contacts, said pump being adapted to inject insulin into the bloodstream.
Claim 9
Dependent Claim
27 words
The transducer of claim 4 wherein a pump is connected across said first and third electrical contacts, said pump being adapted to inject insulin into the bloodstream.
Claim 10
Dependent Claim
27 words
The transducer of claim 5 wherein a pump is connected across said first and third electrical contacts, said pump being adapted to inject insulin into the bloodstream.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |