Instrument for measurement of hemoglobin content of whole blood
Abstract
Abstract A COMPACT INSTRUMENT FOR MEASURING THE HEMOGLOBIN CONTENT OF WHOLE BLOOD, PARTICULARLY ARRANGED FOR THE RAPID ANALYSIS OF A MINUTE SAMPLE OF A PATIENT''S BLOOD SUPPLIED IMMEDIATELY AFTER COLLECTION, BY A DOCTOR IN HIS OWN OFFICE. THE INSTRUMENT IS SO ARRANGED THAT IT MAY BE FULLY AUTOMATED, TO MAKE THE HEMOGLOBIN DETERMINATION AFTER A BLOOD SAMPLE HAS BEEN DELIVERED TO IT, AND TO PROVIDE AN ANALYSIS FOR THE DOCTOR''S USE WITHIN A FEW MINUTES. THE INSTRUMENT UTILIZES A PUMP WHICH DELIVERES TO AND MIXES WITH THE BLOOD SAMPLE IN A PHOTOMETER EXAMINATION CELL, AN ACCURATELY AND CONTINUOUSLY MEASURED AMOUNT OF AN AQUEOUS REAGENT, UNTIL THE VOLUME OF REAGENT ADDED CAUSES THE SAMPLE TO MATCH PHOTOMETRICALLY A STRANDED SAMPLE. THE HEMOGLOBIN CONTENT IS DIRECTLY SHOWN IN APPROPRIATE UNITS ON A METER OR READOUT DEVICES AT THE COMPLETION OF A CYCLE. IN THE FULLY AUTOMATED FORM OF THE DEVICE, A COMPLETE ANALYSIS CYCLE LEAVES THE INSTURMENT CLEANED OUT AND READY TO MAKE ANOTHER ANALYSIS UPON RECEPTION OF ANOTHER BLOOD SAMPLE.
Inventors
- 👤 A Farr
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |