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Related Experiment Video

Updated: Mar 8, 2026

Classical Short-Delay Eyeblink Conditioning in One-Year-Old Children

Classical Short-Delay Eyeblink Conditioning in One-Year-Old Children

Published on: September 1, 2018

The Doyle-Saleh blink reflex.

P W Doyle¹, I Beegun², H A Saleh²

¹Department of Anaesthesia,Charing Cross Hospital,Imperial College Healthcare NHS Trust,London,UK.

The Journal of Laryngology and Otology

|January 24, 2017

Summary

This summary is machine-generated.

Fifty percent of patients undergoing septoplasty or septorhinoplasty exhibit a blink reflex during local anesthetic injection, even under deep general anesthesia. This common blink reflex does not necessitate deeper anesthesia and surgery can safely proceed.

Keywords:

Blink Reflex Nasociliary Nerve Rhinoplasty Septoplasty

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Area of Science:

Anesthesiology
Otolaryngology
Surgical Procedures

Background:

Septoplasty and septorhinoplasty commonly involve local anesthetic infiltration.
A patient blink reflex during this infiltration has been anecdotally observed despite general anesthesia.

Purpose of the Study:

To prospectively quantify the incidence of the blink reflex during local anesthetic injection in patients undergoing septoplasty or septorhinoplasty.
To correlate the blink reflex with anesthetic depth and other physiological parameters.

Main Methods:

Prospective audit of patients undergoing septoplasty or septorhinoplasty.
Observation of blink reflex upon local anesthetic infiltration into the nasal vestibule.
Monitoring of anesthetic depth (propofol, remifentanil, bispectral index), vital signs, and patient movement.

Main Results:

A blink reflex was observed in 15 out of 30 patients (50%).
The average bispectral index was slightly higher in the blink group (32.75) compared to the non-blink group (26.77).
No patient movement was recorded during local anesthetic injection.

Conclusions:

The blink reflex occurs in approximately 50% of patients during nasal local anesthetic infiltration for septoplasty/septorhinoplasty, irrespective of deep anesthesia.
Awareness of this reflex is crucial to avoid unnecessary deepening of anesthesia.
Surgery can safely proceed despite the presence of the blink reflex.