Blood diagnostic instruments
Abstract
Abstract A DIAGNOSTIC INSTRUMENT INTENDED PRIMARILY FOR THE EVALUATION OF VELOCITY-RELATED ABNORMALITIES IN BLOOD. THESE CONDITIONS ARE DETERMINED BY SENSING THE INHERENT TENDENCY OF BLOOD RED CELLS TO MODULATE THE AMPLITUDE OF AN ELECTRIC CURRENT AT A DISTANCE FROM THE ELECTRODES. RESULTING VARIATIONS IN ELECTRICAL IMPEDANCE FOLLOW AN INVARIABLE CUBE-ROOT FUNCTION OF CORPUSCLE VELOCITY. ELECTRODE CONFIGURATION AND PLACEMENT ARE ESSENTIAL FACTORS. THE ELECTRODES EMPLOYED ARE SPECIALLY ADAPTED FOR THE MEASUREMENT OF VELOCITY IN VERY SMALL VESSELS OR HOLLOW TUBES. REMOTE SENSING, WITHOUT PENETRATION OF THE VESSEL, IS EFFECTED BY MEANS OF IONIC-COUPLING TO THE ELECTROLYTIC MIXTURE THROUGH MEMBRANEOUS MATERIALS IMPERVIOUS TO BLOOD.
Inventors
- 👤 Merlin Davis
Bibliographic Details
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |