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Journal of Ultrasound in Medicine, Vol 16, Issue 5 341-344, Copyright © 1997 by American Institute of Ultrasound in Medicine

JOURNAL ARTICLE

Comparative study of 18 gauge and 20 gauge intravenous catheters during transcranial Doppler ultrasonography with saline solution contrast

K. A. Khan, M. Yeung and A. Shuaib
Department of Medicine, Royal University Hospital, University of Saskatchewan, Saskatoon, Canada.

A formal technical protocol has not been established for transcranial Doppler ultrasonography in the detection of venous to arterial shunts; techniques have been adapted from contrast echocardiography. We evaluated the effect of different diameter indwelling intravenous catheters on the detection of right-to-left shunts by transcranial Doppler ultrasonography. Fifteen patients underwent transcranial Doppler sonographic evaluation with saline solution contrast using both 18 gauge and 20 gauge indwelling intravenous catheters. The larger bore intravenous catheter delivered a greater number of signals in a shorter time to the insonated middle cerebral artery. We recommend that a standardized method for transcranial Doppler sonographic contrast studies include an 18 gauge intravenous catheter.


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D. W. Droste, S. Lakemeier, T. Wichter, J. Stypmann, R. Dittrich, M. Ritter, M. Moeller, M. Freund, and E. B. Ringelstein
Optimizing the Technique of Contrast Transcranial Doppler Ultrasound in the Detection of Right-to-Left Shunts
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Copyright © 1997 by the American Institute of Ultrasound in Medicine.