Measuring and testing – Instrument proving or calibrating – Volume of flow – speed of flow – volume rate of flow – or mass...
Patent
1975-04-07
1978-08-29
Swisher, S. Clement
Measuring and testing
Instrument proving or calibrating
Volume of flow, speed of flow, volume rate of flow, or mass...
204195B, G01N 2726
Patent
active
041095057
ABSTRACT:
A system for automatically withdrawing blood from a patient and testing various parameters of the blood, such as oxygen saturation, hemoglobin, gas content (PO.sub.2, PCO.sub.2) and pH, includes a withdrawal unit which automatically withdraws a measured volume of blood, and returns all of it to the patient except a small measured quantity which is provided to an analysis unit that measures the gas content and pH. The withdrawal unit includes provision for continuously monitoring patients' blood pressure, irrigation from a standard I.V. source between blood withdrawals, or a constant low flush of saline, alternatively, as well as detection of any air in the blood, which results in shutting down the system and activating an air alarm. The withdrawal unit also has provision for automatically withdrawing a small sample of blood, measuring oxygen content, and returning all blood to the patient, all on a programmed basis. The analysis unit includes two-point gas and pH calibration and includes use of calibration fluid for washout. In each complete use cycle, blood from the withdrawal unit is washed into the analysis unit and blood in the analysis unit is moved and washed out using saline, water and calibration fluids. The withdrawal unit may be used alone to acquire blood samples, and the analysis unit may be fed by more than one withdrawal unit or by manually-acquired blood specimens.
REFERENCES:
patent: 3055220 (1962-09-01), Ryan et al.
patent: 3263554 (1966-08-01), Pickels
patent: 3648159 (1972-03-01), Stansell et al.
patent: 3658478 (1972-04-01), Spergel
patent: 3661748 (1972-05-01), Blackmer
patent: 3874850 (1975-04-01), Sorensen et al.
patent: 3884640 (1975-05-01), Lock et al.
Clark Justin S.
Veasy Lloyd G.
Foster Lynn G.
Primary Children's Hospital
Swisher S. Clement
LandOfFree
Automated blood analysis system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Automated blood analysis system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automated blood analysis system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1625665