The effect of formal training on the clinical utility of transcranial Doppler ultrasound monitoring in patients with aneurysmal subarachnoid haemorrhage.
We have previously shown that the clinical utility of transcranial Doppler (TCD) ultrasound monitoring for vasospasm in patients with aneurysmal subarachnoid haemorrhage, as performed by untrained operators in a busy neurosurgical unit, is questionable, despite the recommendations for its use in the literature. We determined if formal training improved the utility of TCD. Twelve untrained operators and one trained operator performed a total of 206 TCD examinations. There was poor agreement of results between trained and untrained operators. For the left middle cerebral artery (MCA), right MCA, left anterior cerebral artery (ACA) and right ACA, the blood flow velocities (BFV) recorded by the trained operator were greater than those recorded by the untrained operators by a mean (95% confidence interval) of 27.7 (25.0-30.4), 24.3 (21.4-27.1), 28.2 (25.6-30.9) and 28.1 (24.9-31.1) cm/s, respectively (p<0.001 for all vessels). Greater sensitivity was observed in TCD measurements from the trained operator (100%) compared to untrained operators (40%). To improve the utility of TCD, operators should be provided with training or a professional sonographer employed.
School of Medicine, The University of Melbourne, Parkville, Victoria 3050, Australia. m.bhuiyan@student.unimelb.edu.au
M Rasin
MR
Bhuiyan
Smita
S
Deb
Ruth A
RA
Mitchell
Peter J
PJ
Teddy
Katharine J
KJ
Drummond
D000328:Adult; D000368:Aged; D020771:Anterior Cerebral Artery / Q000000981:diagnostic imaging; D001783:Blood Flow Velocity; D002983:Clinical Competence; D003627:Data Interpretation, Statistical; D004501:Education, Medical; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020768:Middle Cerebral Artery / Q000000981:diagnostic imaging; D018579:Patient Selection; D011237:Predictive Value of Tests; D013345:Subarachnoid Hemorrhage / Q000000981:diagnostic imaging*; D017585:Ultrasonography, Doppler, Transcranial / Q000379:methods; D020301:Vasospasm, Intracranial / Q000000981:diagnostic imaging