Inproceedings: an article in a conference proceedings.
Abstract (Abstract): shot summary in a article that contain essentials elements presented during a scientific conference, lecture or from a poster.
A novel technique using echocardiography to evaluate venous cannula performance in CPB cardiac surgery
Title of the conference
ESAO 2005, 32nd Annual Congress of the European Society for Artificial Organs
Bologna, Italy, October 5-8, 2005
International Journal of Artificial Organs
Document Type: Meeting Abstract
Objective: Echocardiography has never been used to evaluate venous cannula performance. Also, little progress has been made in venous cannula design. Therefore, we designed a self expandable Smartcanula® (SC) and analyzed its performance capability using echocardiography. Methods: Mean (Vm) and maximum (Vmax) velocities, pressure drop (ÄPCPB), flow and diameter were obtained from doppler imaging for the control (CC, n=6) and SC (n=7). LDH and Free Hb were also compared. Comparison was made between the two groups using the student's t-test with statistical significance established when p<0.05. Results: Age for the SC and CC groups was 61.6±17.6 years and 64.6±13.1 years respectively. Weight was 70.3±11.6kg and 72.8±14.4kg respectively. BSA was 1.80±0.2m2 and 1.82±0.2m2 respectively. CPB times were 114±53min and 108±44min respectively. Cross clamp time was 59±15min and 76±29min respectively (p=NS). Free-Hb was 568±142U/L vs 549±271U/L post CPB for the SC and CC respectively (p=NS). LDH was 335±73mg/L vs 354±116mg/L for the SC and CC respectively (p=NS). Vm was 89±10cm/s (SC) vs 63±3cm/s (CC), Vmax was 139±23cm/s (SC) vs 93±11cm/s (CC)(all p<0.01). ÄPCPB was 30±10mmHg (SC) vs 43±13mmHg (CC)(p<0.05). Conclusions: The Smartcanula provides superior flow characteristics compared to the CC. No detrimental effects were observed concerning blood damage. Echocardiography was effective in analyzing venous cannula performance.
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