Method and apparatus for distinguishing between accurate and ina

Details Method and apparatus for distinguishing between accurate and ina Method and apparatus for distinguishing between accurate and ina

1989-07-19

1991-05-14

Smith, Ruth S.

Surgery

Truss

Pad

128680, 128682, A61B 502

Patent

active

050147145

ABSTRACT:
A system for determining if a blood pressure measurement made by an automatic blood pressure monitor has been adversely affected by artifact. The system first compares the diastolic, mean arterial and systolic pressures to respective average diastolic, mean arterial and systolic pressures. If all three of these pressures are within a predetermined range of their corresponding average pressures and if the relationship between these pressures conforms to a physiologically realistic model, then the diastolic, mean arterial and systolic pressures obtained from a measurement are considered valid. If more than one of these pressures is outside the predetermined range of its corresponding average pressure, then the measurement is considered to be adversely affected by artifact and is rejected. If only one of these pressures is outside the predetermined range of its corresponding average pressure, then a replacement pressure is calculated for that pressure. The replacement pressure is calculated based on the pressures that are within the predetermined range and on an average of pressures from previous measurements.

REFERENCES:
patent: 4360029 (1982-11-01), Ramsey, III
patent: 4543962 (1985-10-01), Medero et al.
patent: 4638810 (1987-01-01), Ramsey, III et al.
patent: 4754761 (1988-07-01), Ramsey, III et al.

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