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  • Chemistry  (1)
  • contrast agent  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Left ventricular opacification after peripheral venous injection of a modified albumin solution (1992)
    Springer
    The international journal of cardiovascular imaging 8 (1992), S. 53-61 
    Details
    ISSN: 1573-0743
    Keywords: echocardiography ; contrast agent ; contrast echocardiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The usefulness of a modified albumin solution was assessed in 8 dogs after peripheral venous and inferior vena cava injections. The contrast agent is a mixed solution made of glucose, albumin and glycerin, with sonicated microbubble diameter of 5.0 ± 2.3 μm. Multiple injections (8 ml each) of this contrast agent (total 80 injections) into peripheral vein and inferior cava were performed. The blood pressure from femoral artery was measured before, during and after injections. Two-dimensional echocardiograms were recorded in a modified long axis view on videotapes for play back analysis. The pulmonary transit time and left ventricular contrast persistent time was determined for each injection. The videodensity of the region of interest (ROI) at the center of right ventricle and left ventricle was measured. The background videodensity of both ventricles was evaluated. The videodensity over the ROI of both ventricles with peak contrast enhancement was measured in all frames for 3 consecutive cardiac cycles. The peak videodensity of right and left ventricle subtracting the background videodensity of each ventricles was further calculated respectively. The injections caused no change in blood pressure or heart rate. All injections produced right ventricular contrast echo. As much as 85% of peripheral venous and 82.5% of inferior vena cava injections resulted in left ventricular contrast which was 0.68 and 0.65 as bright as that produced in the right ventricle. Pulmonary transit time and left ventricle contrast persistent time of peripheral venous injection was 4.05 ± 0.53 and 13.67 ± 4.28 seconds respectively. No difference of these data (3.93 ± 0.47 and 11.65 ± 4.66 seconds) from those produced by inferior vena cava injections were noted. Thus, this modified contrast agent is capable of opacifying the left ventricle after peripheral venous injection. The peripheral venous injection is just as effective as the inferior vena cava injection and causes no significant changes in blood pressure and heart rate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01137566
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Well-aligned carbon nanotubulesThis research was supported by a grant from the National Science Council of the Republic of China. We would like to thank Professors Maw-Kuen Wu and Tien-Yaw Luh for support and discussions. (1993)
    Weinheim : Wiley-Blackwell
    Advanced Materials 5 (1993), S. 643-646 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19930050910
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    Paper (German National Licenses)
    Fulltext
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