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Details van artikel 9 van 13 gevonden artikelen
| Titel: |
The area of the pressure -- flow loop for assessment of arterial stenosis: A new index |
| Auteur: |
Zehava Ovadia-Blechman Shmuel Einav Uri Zaretsky David Castel Eran Toledo Michael Eldar |
| Verschenen in: |
Technology & health care |
| Paginering: | Jaargang 10 (2002) nr. 1 pagina's 39-56 |
| Jaar: |
2002-03-25 |
| Inhoud: |
This study describes a novel method for assessing stenotic severity, based on simultaneous pressure and flow wave measurements. Pressure and flow measurements were performed in latex and rubber tubes, and in a clinically-used vascular graft. Pressure waves were recorded at several degrees of stenosis and at different distances proximal to the stenosis. Pressure wave versus flow wave was plotted. Internal pressure-flow loop area (PFLA), loop slope and pressure-axis intercept were calculated. Values of these three indices significantly increased with increasing degrees of stenosis P < 0.001). Similar phenomenon was observed during {\it in-vivo} experiments. Polynomial functions were fitted, resulting in an excellent PFLA variable/ percent stenosis correlation, independent of distance between sensor and stenosis (R^2 > 0.96). In addition, tube compliance was measured and found to correlate with the polynomial coefficients (|R| > 0.9). This innovative approach could significantly contribute to detecting and evaluating arterial stenoses, and to characterize the elasticity of the artery. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 9 van 13 gevonden artikelen
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