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cerebrovascular
transcranial doppler ultrasound
| Question | Answer |
|---|---|
| Three segments of ICA | Cervical, Petrous, Cavernous (siphon) |
| How much blood of ICA flows through the MCAs | 75-80% |
| First branch of the ICA | opthalmic artery |
| 10% of population there is no us penetration due to.. | thickened bone segment (hyperostosis) |
| TCD access windows? | Transtemporal window, Transorbital, and Suboccipital |
| For MCAs set the sample volume depth to | 5cm |
| MCA flow direction in a transtemporal window is.. | towards the transducer and above the spectral baseline |
| SV depth of MCA-ACA bifurcation | 5.5-6.5cm |
| Through the transtemporal window, only vessel that is 'away' from the transducer? | Anterior cerebral artery |
| suboccipital window, all flows are ___ and for which arteries are viewed? | away- vertbral-basilar arteries |
| Those that survive clipping of cerebrovascular aneurysm are at risk for | vasospasm |