This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Request Permissions Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by FALSETTI, H. L. Articles by BELL, A. C. Search for Related Content PubMed PubMed Citation Articles by FALSETTI, H. L. Articles by BELL, A. C.

(Circulation. 1974;49:165.)
© 1974 American Heart Association, Inc.

---

Analysis and Correction of Pressure Wave Distortion in Fluid-Filled Catheter Systems

HERMAN L. FALSETTI M.D.¹; ROBERT E. MATES PH.D.¹; ROBYN J. CARROLL ¹; RAMJI L. GUPTA M.S.¹; ADAM C. BELL SC.D.¹

¹ From the Departments of Medicine and Mechanical Engineering, State University of New York at Buffalo, Buffalo, New York.

Dynamic characteristics of a variety of catheters and their dependence on various operating parameters are presented. Careful flushing of the catheter with degassed water or saline considerably improves the performance of these systems. The operating temperature, number of catheter uses, and average transmural pressure difference do not have a significant effect.

The error due to catheter distortion in commonly used left ventricular performance indices (end diastolic pressure, peak systolic pressure, maximum dp/dt and V_max) was assessed. On the basis of these results, it is shown that the natural frequency of the catheter system must be greater than 40 Hz to produce results accurate to 10%.

The experimental data were used to develop a semi-empirical model for the catheter transducer system. This model was used in the design of an analog compensator to further improve the dynamic characteristics of the catheter transducer system. The compensator requires only two parameter settings, catheter natural frequency and damping ratio.

Key Words: Frequency response • Cardiac catheter • Pressure compensation • LV pressure • Rate of pressure rise

Submitted on June 7, 1973
Accepted on September 4, 1973

This article has been cited by other articles:

				F. Akhavein, E. J. St.-Michel, E. Seifert, and C. V. Rohlicek Decreased left ventricular function, myocarditis, and coronary arteriolar medial thickening following monocrotaline administration in adult rats J Appl Physiol, July 1, 2007; 103(1): 287 - 295. [Abstract] [Full Text] [PDF]