Electronic clinical sphygmomanometer

Details Electronic clinical sphygmomanometer Electronic clinical sphygmomanometer

1989-07-06

1990-11-20

Sykes, Angela D.

Surgery

Truss

Pad

128680, A61B 50225

Patent

active

049710648

ABSTRACT:
In an electronic clinical sphygmomamometer of the type which measures blood pressure on the basis of a Korotkoff-sound signal in a pulse-wave gate signal, the level of a detected pulse-wave signal is compared with a predetermined threshold level to form a pulse-wave gate signal the duration of which corresponds to a period over which the level of the pulse-wave signal is higher than the predetermined threshold level. If no Korotkoff-sound detection signal is provided in the pulse-wave gate signal thus formed, the duration of the pulse-wave gate signal is extended by a predetermined time period. The thus-extended duration of the pulse-wave period required to measure the systatic blood pressure gate signal serves as the measurement.

REFERENCES:
patent: 4214589 (1980-07-01), Sakamoto et al.
patent: 4261368 (1981-04-01), Danna et al.
patent: 4459991 (1984-07-01), Hatschek
patent: 4475557 (1984-10-01), Hatschek et al.
patent: 4549549 (1985-10-01), Furukawa
patent: 4840181 (1989-06-01), Yamaguchi
European Search Report Conducted by Examiner B. W. Hunt, Completed on Oct. 11, 1989, in the Hague (4 prior art references cited).

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