General Anesthesia: Overview
Stages of General Anesthesia
Local Anesthetics: Clinical Application as Spinal Anesthesia
Local Anesthetics: Clinical Application as Epidural Anesthesia
Local Anesthetics: Clinical Application as Intravenous Regional Anesthesia
Local Anesthetics: Clinical Application as Surface, Infiltration, and Conduction Block Anesthesia
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Updated: Feb 7, 2026

Topical Airway Anesthesia for Awake-endoscopic Intubation Using the Spray-as-you-go Technique with High Oxygen Flow
Published on: January 13, 2017
Alexander Kulikov1, Andrey Lubnin
1Department of Anesthesiology, Burdenko National Medical Research Center of Neurosurgery, Moscow, Russia.
This review examines modern anesthetic techniques for awake brain surgery, comparing different sedation methods and pain management strategies to improve patient safety and surgical outcomes during brain mapping.
Area of Science:
Background:
No prior work had resolved the optimal anesthetic strategy for patients undergoing awake brain surgery. That uncertainty drove clinicians to rely heavily on personal experience rather than standardized protocols. Prior research has shown that both asleep-awake-asleep and monitored anesthesia care remain viable options. This gap motivated a comprehensive evaluation of current trends in perioperative management. It was already known that patient comfort and seizure prevention are significant challenges during these procedures. Investigators have sought to identify safer alternatives to traditional sedative agents. That ambiguity necessitated a review of pharmacological agents like dexmedetomidine and levetiracetam. This synthesis clarifies the current landscape of neuroanesthesia practices for complex intracranial interventions.
Purpose Of The Study:
This review aims to report on current trends in the anesthetic management of patients undergoing awake craniotomy. The authors seek to synthesize existing knowledge regarding preoperative preparation and sedation schemes. They intend to compare the efficacy of different anesthetic approaches for performing intraoperative brain mapping. The study addresses the persistent challenge of pain management despite the use of standard analgesic techniques. Researchers investigate the role of pharmacological agents in enhancing patient safety and comfort. The work explores the prevention of intraoperative complications, specifically focusing on seizure management and neurological protection. This analysis aims to clarify the current state of neuroanesthesia for these complex surgical interventions. The motivation stems from the need to standardize care as these procedures become more common in clinical practice.
Main Methods:
The review approach involved a systematic synthesis of current trends in perioperative anesthetic management. Investigators analyzed preoperative preparation protocols and various sedation schemes utilized in modern practice. The authors evaluated pain management strategies, including the application of scalp blocks and opioid administration. They examined the prevention of intraoperative complications such as seizures and neurological deficits. The study design focused on comparing monitored anesthesia care against asleep-awake-asleep techniques. Researchers assessed the efficacy of specific pharmacological agents like dexmedetomidine and levetiracetam. The analysis incorporated data regarding the evolution of these procedures from rare interventions to standard clinical practice. This methodology provided a comprehensive overview of existing literature to inform current neuroanesthetic standards.
Main Results:
Key findings from the literature indicate that monitored anesthesia care and asleep-awake-asleep protocols demonstrate equal efficacy for brain mapping. Dexmedetomidine provides a safe and effective alternative to propofol for sedation during monitored procedures. Despite the use of scalp blocks and opioids, pain remains a frequent issue for patients during surgery. Appropriate surgical maneuvers can effectively reduce pain and prevent postoperative neurological complications. The evidence regarding prophylactic anticonvulsant use for seizure prevention remains largely uncertain. Levetiracetam appears potentially superior to other anticonvulsant drugs for this specific clinical purpose. Awake craniotomy has successfully transitioned from a rare approach to a common neurosurgical intervention. Modern techniques now facilitate successful brain mapping for nearly all patients undergoing these procedures.
Conclusions:
The authors suggest that both primary anesthetic techniques demonstrate comparable success rates for mapping cortical functions. They propose that individual practitioner preference currently dictates the selection of specific sedation protocols. Dexmedetomidine represents a viable alternative to propofol due to its favorable safety profile in monitored settings. The researchers note that pain management remains a persistent challenge despite the utilization of scalp blocks and opioid analgesics. They indicate that surgical technique influences the incidence of postoperative neurological deficits. The review highlights that prophylactic anticonvulsant use lacks robust evidence, although levetiracetam shows potential benefits. They conclude that awake procedures have transitioned from niche interventions to standard neurosurgical practice. Future investigations should prioritize the management of high-risk populations to improve overall clinical outcomes.
The researchers propose that both asleep-awake-asleep and monitored anesthesia care provide equivalent efficacy for cortical mapping. While clinicians often choose based on personal preference, dexmedetomidine serves as a safe, effective alternative to propofol for maintaining sedation during these procedures.
The authors identify dexmedetomidine as a rational substitute for propofol. This agent offers high safety and efficacy during monitored anesthesia care, providing a distinct pharmacological option for managing patient sedation levels during intracranial surgery.
The authors state that scalp blocks and opioids are standard, yet pain remains a frequent patient complaint. They suggest that refined surgical tactics are necessary to mitigate discomfort and prevent subsequent neurological complications during the recovery phase.
The review indicates that prophylactic anticonvulsant efficacy is generally doubtful. However, the researchers note that levetiracetam may offer superior performance compared to other traditional anti-seizure medications when managing intraoperative risks.
The authors observe that awake craniotomy has evolved from a rare, specialized technique into a commonly performed neurosurgical procedure. Modern anesthetic advancements now allow for successful brain mapping across a diverse range of patient populations.
The researchers identify the management of high-risk patients as the primary focus for future studies. They emphasize that addressing these complex cases is necessary to further refine anesthetic safety and surgical success rates.