Cranial Accelerometry Can Detect Cerebral Vasospasm Caused by Subarachnoid Hemorrhage

Neurocritical Care
Wade S SmithNerissa U Ko

Abstract

We previously reported the presence of a cranial "bruit" in patients with cerebral vasospasm by signal processing cranial accelerometry signals time locked to the cardiac cycle. This shift to higher frequencies is likely related to the turbulence of blood flow produced by vascular narrowing. We sought to build a more quantitative model to predict cerebral vasospasm then test the accuracy of this technique to detect cerebral vasospasm in a prospective blinded study. Skull accelerometry was performed using an array of 6 highly sensitive accelerometers placed in contact with the scalp. Paired transcranial Doppler (TCD) recordings and accelerometry epochs were obtained in consecutive patients with subarachnoid hemorrhage undergoing TCD recordings for surveillance of cerebral vasospasm. The energy of rectified acceleration measurements within systolic and diastolic bands of the cardiac cycle were measured and correlated with TCD-defined spasm. This model was then tested prospectively in a blinded consecutive sample of subarachnoid hemorrhage patients to determine accuracy of the technique. We developed a model predicting cerebral vasospasm from analysis of 14 unblinded subjects with varying degrees of cerebral vasospasm as detected ...Continue Reading

References

Oct 5, 2010·AJNR. American Journal of Neuroradiology·E D GreenbergP Sanelli
Jul 11, 2014·Clinical Journal of Sport Medicine : Official Journal of the Canadian Academy of Sport Medicine·Paul S AuerbachWade S Smith

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Citations

Jul 30, 2019·International Journal of Stroke : Official Journal of the International Stroke Society·Kyle B Walsh

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