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KMID : 1137820080290050371
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의공학회지
2008 Volume.29 No. 5 p.371 ~ p.375
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Estimation of Target and Completion Pressure during the Cuff Inflation Phase in Blood Pressure Measurement
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Oh Hong-Sic
Lee Jong-Shill
Kim Young-Soo
Shen Dong-Fan
Kim In-Young
Chee Young-Joon
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Abstract
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In blood pressure measurement, the oscillometric method detects and analyzes the pulse pressure oscillation while deflating the cuff around the arm. For its principle, one has to inflate cuff pressure above the subject’s systolic pressure and deflate below the diastolic pressure. Most of the commercialized devices inflate until the fixed target pressure and deflate until the fixed completion pressure because there is no way to know the systolic and diastolic pressure before measurement. Too high target pressure makes stress to the subject and too low target pressure makes big error or long measurement time because of re-inflation. There are similar problems for inadequate completion pressure. In this study, we suggest new algorithm to set proper target and completion pressure for each subject by analyzing pressure waveform while inflating period. We compared our proposed method and auscultation method to see the errors of estimation. The differences between the two measurements were -4.024.80mmHg, -10.5010.57mmHg and -0.785.l7mmHg for mean arterial pressure, systolic pressure and diastolic pressure respectively. Consequently, we could set the target pressure by 30 mmHg higher than our estimation and we could stop at 20mmHg lower than our estimated diastolic pressure. Using this method, we could reduce the measurement time.
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KEYWORD
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blood pressure, oscillometric, Inflation, non-invasive blood pressure measurement
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