Abstract
A system for online compensation and differentiation of blood-pressure pulse waves was developed which compensates for pressure-waveform distortion due to transmission, in fluid-filled catheters and provides outputs of pressure P,\(\dot P\), P/\(\dot P\) and\(\dot P\). The compensator can be tuned with the catheter in place by changing the natural frequency and damping ratio when these catheter parameters are altered by fibrin deposits, gas bubbles, and softening of the catheter wall. The compensator can be used with standard monitoring equipment and its output can be recorded or displayed on a cathode-ray-tube oscilloscope.
Sommaire
On a développé un système pour compenser et différencier en circuit les ondes de pulsation de pression sanguine. Ce système compense les distorsions d'ondes de pression causées par les transmissions dans les cathéters remplis de fluide et donne des rendements de pression P. P, P/P et P. Le compensateur peut être réglé avec le cathéter en position en changeant la fréquence naturelle et le rapport d'atténuation lorsque ces paramètres de cathéter sont modifiés par des dépôts de fibrine, des bulles de gaz et l'amolissement de la paroi du cathéter. Le compensateur peut être utilisé avec de l'appareillage normal de contrôle et sa sortie peut être enregistrée ou affichée sur un oscillographe cathodique.
Zusammenfassung
Es wurde ein System zum direkten Ausgleich und zur Unterscheidung von Blutdruck-Impulswellen entwickelt, bei dem die Druckwellenformverzerrung durch Übertragung in mit Flüssigkeit gefüllten Kathetern ausgeglichen wird, und durch das man die Durckwerte P, P, P/P und P erhält. Der Kompensator kann mit dem angebrachten Katheter abgestimmt werden, indem man die natürliche Frequenz und das Dämpfungsverhältnis abwandelt, wenn sich diese Katheterparameter durch Fibrinablagerungen, Gasblasen und Erweichen der Katheterwände ändern. Der Kompensator kann mit standardmäßigen Überwachunsgeräten angewandt werden. Seine Ausgabewerte können aufgezeichnet oder auf einem Oszilloskop mit Kathodenstrahlröhre angezeigt werden.
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Damenstein, A., Stout, R.L., Wessel, H.U. et al. Electronic compensator for pressure waveform distortion by fluid-filled catheters. Med. & biol. Engng. 14, 186–192 (1976). https://doi.org/10.1007/BF02478746
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DOI: https://doi.org/10.1007/BF02478746