[Anesthesiological management in endovascular stroke treatment]

Early recanalization of the closed cerebral arteries after acute ischemic stroke (AIS) is the only treatment to minimize long-term disability and to reduce the associated morbidity and mortality. For a long time the only proven causal treatment of AIS was intravenous thrombolysis; however, after the publication of a series of randomized prospective studies concerning endovascular mechanical thrombectomy using stent retriever systems after AIS, new guidelines were published. It was found that endovascular treatment (EVT) dramatically improves the outcome of eligible patients. The stent retriever enables high recanalization rates by clot removal from the cerebral arterial system by means of aspiration of the thrombus via the catheter and/or by entrapping it with a stent system. The management of anesthesia during the procedure is indispensable to prevent hypoxia and hemodynamic instability; however, which form of anesthesia (i.e. general anesthesia vs. conscious sedation) is advantageous for the patient during EVT is controversially discussed. In the first studies using retrospective data conscious sedation resulted in a better outcome compared to general anesthesia following EVT; however, in prospective studies this finding could not be confirmed. To obtain optimal neurological results after AIS and EVT with general anesthesia, it is of tremendous importance not to delay the EVT due to the anesthesiology procedure. Furthermore, hypotension, hypovolemia and hypocapnia should also be strictly avoided. Finally, the optimal anesthesiological approach should be guided by the current clinical state and pre-existing comorbidities of the patient.