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. 1984 Nov;12(11):978-82.
doi: 10.1097/00003246-198411000-00013.

Use of a needle valve variable resistor to improve invasive blood pressure monitoring

J H Abrams, M L Olson, J A Marino, F B Cerra

Use of a needle valve variable resistor to improve invasive blood pressure monitoring

J H Abrams et al. Crit Care Med. 1984 Nov.

Abstract

Inaccurate measurements using in-line systems are partly due to the resonance frequency. A variable acoustic resistor designed to change the damping coefficient of these monitoring systems was evaluated under clinical conditions. The device improved pressure transmission characteristics in measurements on 12 of 13 patients. Use of the device and of the bedside step-impulse test for calibration should improve the reliability of in-line blood pressure monitoring.

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