Role of single photon emission computed tomography and transcranial doppler ultrasonography in clinical vasospasm

Using Continuous Electroencephalography in the Management of Delayed Cerebral Ischemia Following Subarachnoid Hemorrhage

“…Selective non-invasive diagnostic tools such as computerized tomography (CT) angiography, CT perfusion, magnetic resonance (MR), single positron emission CT, and transcranial Doppler ultrasound (TCD) have been shown to be useful in the detection of disruptions of perfusion or flow due to vasospasm [2,[21][22][23]. With the exception of TCD, these methods are not performed by the bed-side and have not shown significant applicability in the pre-clinical detection of DCI [2,23].…”

Xe-CT and transcranial doppler in symptomatic vasospasm subarachnoid hemorrhage patients under euvolemic treatment without sedation

“…CBF definitions based on Xe-CT study in aSAH include: irreversible ischemia (CBF <10 ml/100 g/min), ischemia penumbra (CBF 10-20 ml/100 g/min), oligemia (CBF 20-34 ml/100 g/min), relative hyperemia (CBF 34-55 ml/100 g/min), and absolute hyperemia (CBF >55 ml/100 g/min). [17] In majority of our patients, MCA CBF was relatively in hyperemic range. In the earlier studies in patients with clinically symptomatic or TCD vasospasm treated with 3H therapy, wide range of cerebral percussion disturbances have been described.…”

Is Transcranial Doppler Ultrasonography Old-fashioned?: One Institutional Validity Study

“…Also, there was a report that TCD-defined vasospasm did not independently influence the clinical decision-making after SAH 13) . On the contrary, several studies have shown good correlation between elevated BFV and symptomatic vasospasm 6,17,19) . Recently, color TCD study performed by Mariak et al 11) has shown that the color TCD in the diagnosis of advanced MCA narrowing was very good, and the best-performing parameter was peak systolic velocity of 182 cm/s.…”