Upload
edmund-lyons
View
215
Download
1
Tags:
Embed Size (px)
Citation preview
NeurosonologNeurosonology in acute y in acute stroke patientsstroke patients
ŠŠkoloudík D.koloudík D.
Department of NeurologyDepartment of NeurologyUniversity Hospital Ostrava University Hospital Ostrava && Olomouc Olomouc
NeurosonologyNeurosonology
Duplex sonography of cervical Duplex sonography of cervical arteriesarteries
Duplex sonography of eyehole Duplex sonography of eyehole (ophthalmic artery, optical nerve)(ophthalmic artery, optical nerve)
Transcranial DopplerTranscranial Doppler Transcranial duplex sonographyTranscranial duplex sonography
MethodologyMethodology
Necessity of fast diagnostic – Necessity of fast diagnostic – occlusion or stenosis of cervical or occlusion or stenosis of cervical or intracranial artery for a choosing the intracranial artery for a choosing the best therapeutical method best therapeutical method
Examination must not exceed 5 – 10 Examination must not exceed 5 – 10 minutesminutes
Echocontrast agent useEchocontrast agent use
CarotidsCarotids
StenosisStenosis OcclusionOcclusion DissectionDissection ArteriitisArteriitis
Evaluation of stenosisEvaluation of stenosis
PSV – best correlation with DSA PSV – best correlation with DSA (sensitivity, specificity approx. 90%)(sensitivity, specificity approx. 90%)
EDVEDV PSV ICA/PSV CCA, EDV ICA/EDV CCAPSV ICA/PSV CCA, EDV ICA/EDV CCA Lumen reduction, area Lumen reduction, area
CalcificationCalcification!!!!!!
Chronic vs. acute occlusionChronic vs. acute occlusion
B-mode (anechogenic acute B-mode (anechogenic acute thrombus)thrombus)
Collateral flowCollateral flow Asymmetric PSV in MCA´sAsymmetric PSV in MCA´s
Vertebral arteriesVertebral arteries
StenosisStenosis OcclusionOcclusion Steal syndomSteal syndom DissectionDissection
EyeholeEyehole
TCCS/TCDTCCS/TCD 1-4/2 MHz probe, (MI 1.5, TIS 1.2)1-4/2 MHz probe, (MI 1.5, TIS 1.2) TCCS: B-mode, M-mode, color mode, TCCS: B-mode, M-mode, color mode,
power mode, Doppler modepower mode, Doppler mode TCD: Doppler mode, Power M-modeTCD: Doppler mode, Power M-mode Acoustic window - temporal, Acoustic window - temporal,
suboccipital, frontal, occipital, orbital, suboccipital, frontal, occipital, orbital, submandibularsubmandibular
Acute strokeAcute stroke Occlusion of intracranial stenosisOcclusion of intracranial stenosis Intracranial artery stenosisIntracranial artery stenosis Hemodynamic changes (e.g. ICA Hemodynamic changes (e.g. ICA
occlusion)occlusion) HITS / MESHITS / MES HaemorhageHaemorhage AngiopathyAngiopathy Intracranial hypertensionIntracranial hypertension
Artery occlusionArtery occlusion Main: B-mode (MCA), Doppler mode Main: B-mode (MCA), Doppler mode
(no flow in occlusion, low PSV and (no flow in occlusion, low PSV and high PI, RI proximaly to the high PI, RI proximaly to the occlusion)occlusion)
Other: color mode, power mode, Other: color mode, power mode, detection of collateralsdetection of collaterals
Occlusion of MCA branchesOcclusion of MCA branches
Asymmetry in PSV (Zanette index Asymmetry in PSV (Zanette index 1.3, 30% site-to-site difference, TIBI 1.3, 30% site-to-site difference, TIBI criteria)criteria)
Increase of PI a RIIncrease of PI a RI
Artery stenosis - dg. criteriaArtery stenosis - dg. criteria MainMain: local jet with PSV ratio more : local jet with PSV ratio more
than 1.5than 1.5 OtherOther: turbulent flow, aliasing in : turbulent flow, aliasing in
color mode, lumen narrowing in color mode, lumen narrowing in power modepower mode
stenosis poststenoticstenosis poststenotic
• PSV-S/PSV-Z = 267.1/70.4 = 3.78 … grade III
Grading of stenosisGrading of stenosis US AGUS AG
Grade I: PSV index 1.5-1.99 … 20-39%Grade I: PSV index 1.5-1.99 … 20-39% Grade II: PSV index 2.0-2.99 … 40-59%Grade II: PSV index 2.0-2.99 … 40-59% Grade III: PSV index Grade III: PSV index >> =3.0 … =3.0 … >>= 60%= 60%
Correlation: Correlation:
kappa coefficient: 0.68kappa coefficient: 0.68
AngiopathyAngiopathy
HaemorrhageHaemorrhage
Increasing of intracranial pressureIncreasing of intracranial pressure
Thrombosis of cerebral sinusesThrombosis of cerebral sinuses
LimitationLimitation
Dependence on sonographer Dependence on sonographer experienceexperience
Insufficient bone window (8 – 20%)Insufficient bone window (8 – 20%)
female
%
male
age (years)
Echocontrast agentsEchocontrast agents
Bolus injection - 0.2-0.5 ml Optison Bolus injection - 0.2-0.5 ml Optison (1:10) nebo 0.5ml SonoVue(1:10) nebo 0.5ml SonoVue
BloomingBlooming!! Increasing of a Doppler signal for Increasing of a Doppler signal for
about 1 minuteabout 1 minute
MonitoringMonitoring
Monitoring HITS / MESMonitoring HITS / MES
Monitoring of artery recanalizationMonitoring of artery recanalization
Sonothrombotripsy, Sonothrombotripsy, sonothrombolysissonothrombolysis
MicroembolusMicroembolus
MicroembolusMicroembolus
Thanks
for your
attention