Surgery – Diagnostic testing – Cardiovascular
Reexamination Certificate
2009-07-22
2010-12-07
Nasser, Robert L (Department: 3735)
Surgery
Diagnostic testing
Cardiovascular
C600S494000, C600S496000
Reexamination Certificate
active
07846105
ABSTRACT:
The present invention discloses a non-invasive blood pressure measurement apparatus and a safety protection method. In addition to a main pressure measurement circuit and a main microprocessor circuit, the measurement apparatus also includes an independently disposed assist pressure measurement circuit and an independently disposed assist microprocessor circuit. In normal measurement, the assist microprocessor circuit periodically samples a cuff pressure via the assist pressure measurement circuit, and compares the measured cuff pressure with a specified overpressure protection value, and if the cuff pressure exceeds the specified overpressure protection value, the assist microprocessor circuit outputs a control signal to open a deflation valve until the pressure falls to below the safety pressure. Compared with the prior art, the method for overpressure protection of the present invention is more direct and has higher accuracy of decision, leading to higher reliability of the overpressure protection and higher safety of the measurement apparatus.
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Bo He
Cen Jian
Wu Xiaoyu
Christensen Kory D.
Nasser Robert L
Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
Stoel Rives LLP
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