Article: PDF OnlyUse of a needle valve variable resistor to improve invasive blood pressure monitoringABRAMS, JEROME H. MD; OLSON, MARK L. BA; MARINO, JOSEPH A. BS; CERRA, FRANK B. MD Author Information From the Departments of Surgery and of Patient Monitoring, University of Minnesota Hospitals, Minneapolis, MN. Critical Care Medicine: November 1984 - Volume 12 - Issue 11 - p 978-982 Buy 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 inline blood pressure monitoring. © Williams & Wilkins 1984. All Rights Reserved.
