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Showing content from https://link.springer.com/article/10.1007/s10439-014-1026-4 below:

Method for High Accuracy Differential Pressure Measurements Using Fluid-Filled Catheters

The advantage of measuring differential pressure using fluid-filled catheters is that the system is relatively inexpensive, but the readings are not accurate and affected by the common mode pressure (CMP) distortion. High accuracy differential pressure measurements are required in various biomedical applications, such as in fluid-dynamic test rigs, or in the cath-lab, from cardiac valves efficacy to functional assessment of arterial stenoses. We have designed and built a unique system in which the pressure difference was measured along the fluid flow inside a rigid circular tube using a fluid-filled double-lumen catheter. The differential pressure measurements were taken across two side-holes near the catheter distal tip, spaced apart by 3 cm. The goal was to overcome the CMP error, which significantly distorted the output differential pressure signal and to formulate a restoration factor. A restoration formula was developed based on simultaneous gauge pressure measurements, and was tested in several different cases. Several representative cases are presented and show that the common mode artifact was reduced by factors of 12–27. The restored pressure gradient signal was validated using direct pressure drop measurements, and showed very good agreement.

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CMP:

Common mode pressure

CMP _p2p :

Common mode pressure effect peak-to-peak (of P _cmp) (mmHg)

Err _cmp :

Common mode pressure estimation error (mmHg)

P _cmp :

Common mode pressure (mmHg)

P _d :

True pressure drop (mmHg)

P _dm :

Measured pressure drop (mmHg)

P _g :

Gauge pressure (mmHg)

RMSE :

Root mean square error (mmHg)

W _n (t):

Percent weight of term n (in Eq.(1)) (%)

1. Hamilos, M., A. Peace, G. Kochiadakis, E. Skalidis, A. Ntalianis, B. De Bruyne, and P. Vardas. Fractional flow reserve: an indispensable diagnostic tool in the cardiac catheterisation laboratory. Hell. J. Cardiol. 51:133–141, 2010.

   Google Scholar 

2. Hays, J., M. Lujan, and R. Chilton. Aortic stenosis catheterization revisited: a long sheath single-puncture technique. J. Invasive Cardiol. 18:262–267, 2006.

   PubMed  Google Scholar 

3. Hunziker, P. Accuracy and dynamic response of disposable pressure transducer-tubing systems. Can. J. Anaesth. 34:409–414, 1987.

   Article  CAS  PubMed  Google Scholar 

4. Jayne, J. E., E. Catherwood, N. W. Niles, and B. J. Friedman. Double-lumen catheter assessment of aortic stenosis: comparison with separate catheter technique. Catheter. Cardiovasc. Diagn. 29:157–160, 1993.

   Article  CAS  Google Scholar 

5. Lambermont, B., P. Gerard, O. Detry, P. Kolh, P. Potty, V. D’Orio, and R. Marcelle. Correction of pressure waveforms recorded by fluid-filled catheter recording systems: a new method using a transfer equation. Acta Anaesthesiol. Scand. 42:717–720, 1998.

   Article  CAS  PubMed  Google Scholar 

6. Romagnoli, S., S. M. Romano, S. Bevilacqua, C. Lazzeri, G. F. Gensini, C. Pratesi, D. Quattrone, D. Dini, and A. R. De Gaudio. Dynamic response of liquid-filled catheter systems for measurement of blood pressure: precision of measurements and reliability of the pressure recording analytical method with different disposable systems. J. Crit. Care 26:415–422, 2011.

   Article  PubMed  Google Scholar 

7. Wellnhofer, E., M. Krügel, M. Nietsch, V. Combé, and M. Sommer. Validation of a device for high fidelity correction of pressure signals from fluid-filled systems by harmonic analysis. J. Cardiobiol. 1:6, 2013.

   Google Scholar 

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The study was partially supported by Joseph Drown Foundation and Herbert Berman Fund.

The authors have no conflicts of interest.

1. Department of Biomedical Engineering, Faculty of Engineering, Tel Aviv University, 69978, Tel Aviv, Israel

   Oren M. Rotman, Uri Zaretsky & Shmuel Einav

2. Faculty of Mechanical Engineering, Technion, Israel Institute of Technology, 32000, Haifa, Israel

   Avraham Shitzer

1. Oren M. Rotman
2. Uri Zaretsky
3. Avraham Shitzer
4. Shmuel Einav

Correspondence to Oren M. Rotman.

Associate Editor K. A. Athanasiou oversaw the review of this article.

Rotman, O.M., Zaretsky, U., Shitzer, A. et al. Method for High Accuracy Differential Pressure Measurements Using Fluid-Filled Catheters. Ann Biomed Eng 42, 1705–1716 (2014). https://doi.org/10.1007/s10439-014-1026-4

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• Received: 19 March 2014

• Accepted: 02 May 2014

• Published: 09 May 2014

• Issue Date: August 2014

• DOI: https://doi.org/10.1007/s10439-014-1026-4

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