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Table 7 Intervention algorithm initiated by EEG slowing and/or cerebral venous oxygen desaturation. /: no change; +: increase; -: decrease; TCD: trans cranial doppler; CPB: cardio pulmonary bypass (From 25).

From: Cerebral blood flow during cardiopulmonary bypass in pediatric cardiac surgery: the role of transcranial Doppler – a systematic review of the literature

TEMPERATURE BLOOD PRESSURE TCD NOTIFICATION INTERVENTION
Prebypass     
/ / - peak velocity Aorta obstructed Adjust aortic cannula
/ / - diastolic velocity Cava obstructed Asdjust venous cannula
CPB     
/ / + peak velocity Hyperemia - Pump flow
/ / Gas emboli Gas emboli Deair, repair circuit
+ / - peak velocity Flow metabolism uncoupling +BP; - metabolic demand
/ / - peak velocity Low cerebral flow Adjust aortic cannula/clamp; + Pump flow
Postbypass     
/ / - Diastolic velocity Cerebral edema Mannitol; ultrafiltration
Anytime     
/ - - Peak velocity Loss of autoregolation + BP; neuroprotection
+ EEG frequency     
/ /, + /, + peak velocity Insufficient sedation + Sedation