TIVA Enables Earlier Facial Nerve Monitoring in Ear Surgery

TOPLINE:

Total intravenous anesthesia (TIVA) enables earlier intraoperative monitoring of facial nerve activity than sevoflurane anesthesia during ear surgery, with reduced patient-ventilator dyssynchrony and fewer requirements for postoperative antiemetics.

METHODOLOGY:

• Researchers evaluated the difference in the timeliness of intraoperative monitoring of facial nerve activity during ear surgery with TIVA vs sevoflurane anesthesia.
• They included 98 patients aged 18-74 years undergoing ear surgery between November 2021 and November 2022; patients were randomly assigned to receive either TIVA or sevoflurane during the procedure. Of these, 92 were included in the final analysis.
• Neuromuscular function was monitored quantitatively throughout anesthesia with train-of-four counts and train-of-four ratios.
• The time from the administration of rocuronium to the start of facial nerve monitoring was recorded.
• The primary outcome measure focused on the recovery index, defined as the time interval between a train-of-four ratio of 0.25 and 0.75; the key secondary outcome was the time to reach a train-of-four ratio of 0.25 from rocuronium administration.

TAKEAWAY:

• The recovery index was significantly shorter in the TIVA group than in the sevoflurane group (9 minutes vs 34 minutes; P
• The time to reach a train-of-four ratio of 0.25 was achieved earlier with TIVA than with sevoflurane (34 minutes vs 51 minutes; P
• Patient-ventilator dyssynchrony occurred less frequently in the TIVA group than in the sevoflurane group (15% vs 39%; P = .01).
• Postoperative requests for antiemetics were less frequent in the TIVA group than in the sevoflurane group (2% vs 17%; P = .03).

IN PRACTICE:

“We suggest that TIVA may be a better choice than sevoflurane anesthesia to meet an earlier request” for intraoperative facial nerve monitoring by surgeons, the study authors wrote.

SOURCE:

The study was led by Yu Jeong Bang, MD, of the Department of Anesthesiology and Pain Medicine at Sungkyunkwan University School of Medicine, in Seoul, Republic of Korea. It was published online on November 27, 2024, in the Canadian Journal of Anesthesia.

LIMITATIONS:

A careful interpretation of results may be necessary when clinicians use balanced anesthesia, such as sevoflurane with adjuvants like opioids or nonopioids. The feasibility of intraoperative facial nerve monitoring was decided by the surgeon during surgery, and the lowest stimulation intensity threshold for electromyography amplitude was not detected, as it was not the focus of this study. Although patients requiring intraoperative facial nerve monitoring during ear surgery were enrolled, some did not undergo the procedure based on the surgeon’s judgment.

DISCLOSURES:

This study did not receive any funding. The authors disclosed no relevant conflicts of interest.

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.