Motion artifact detection for continuous blood pressure monitor transducer

• US 4,924,871 A
• Filed: 02/26/1988
• Issued: 05/15/1990
• Est. Priority Date: 02/26/1988
• Status: Expired due to Term

• Current Assignee: Omron Healthcare Company Limited (Omron Corporation)
• Original Assignee: Colin Electronics Co., Ltd.
• Inventors: Honeyager, Kevin S.
• Primary Examiner(s): Sykes, Angela D.
• Application Number:
  US07/160,573
• Time in Patent Office: 809 Days
• Field of Search: 128/670-672, 128/677, 128/680-690
• US Class Current: 600/485
• CPC Class Codes: A61B 2562/0247 Pressure sensors
• CPC Class Codes: A61B 2562/046 in a matrix array
• CPC Class Codes: A61B 5/021 Measuring pressure in heart or blood vessels A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/7207 of noise induced by motion artifacts

Abstract

A method for detecting motion artifacts in data obtained from a blood pressure monitoring transducer is provided which prevents erroneous data related to such artifacts from interfering with the accuracy of the blood pressure measurement by way of continuously monitoring the pressure control source which maintains the transducer hold down pressure, and temporarily delaying data acquisition in the event the hold down pressure changes in excess of a predetermined limit.

Claims

1. A method for rejecting motion artifacts in data obtained from a blood pressure monitor transducer, comprising the steps of:

attaching a transducer to a person'"'"'s wrist, said transducer comprising a pressurizable bellows and a sensor having a plurality of pressure sensing elements thereon, said sensor being positioned over an artery in said wrist to allow at least one of said pressure sensing elements to produce a pulse amplitude output signal indicative of the pulse waveform in said artery;

pressurizing said pressurizable bellows to a predetermined hold down pressure;

monitoring the pressure in said pressurizable bellows to detect a change therein above a predetermined limit, said predetermined limit being indicative of motion of said patient; and

interrupting the collection of data from said pressure sensing elements for a predetermined time upon detection of a change in pressure above said predetermined limit.