Abstract
Pupil reactivity can be used to evaluate central nervous system function and can be measured using a quantitative pupillometer. However, whether anesthetic agents affect the accuracy of the technique remains unclear. We examined the effects of anesthetic agents on pupillary reactivity. Thirty-five patients scheduled for breast or thyroid surgery were enrolled in the study. Patients were divided into four groups based on the technique used to maintain anesthesia: a sevoflurane–remifentanil (SEV/REM) group, a sevoflurane (SEV) group, a desflurane–remifentanil (DES/REM) group, and a propofol–remifentanil (PRO/REM) group. We measured maximum resting pupil size (MAX), reduction pupil size ratio (%CH), latency duration (LAT) and neurological pupil index (NPi). A marked reduction in MAX and %CH compared with baseline was observed in all groups, but LAT was unchanged during surgery. NPi reduced within the first hour of surgery in the SEV/REM, SEV, and DES/REM groups, but was not significantly different in the PRO/REM group. Compared with the PRO/REM group, mean %CH and NPi in patients anesthetized with SEV/REM, SEV or DES/REM were markedly lower at 1 h after surgery had commenced. There was no correlation between NPi and bispectral index. Fentanyl given alone decreased pupil size and %CH in light reflex, but did not change the NPi. NPi was decreased by inhalational anesthesia not but intravenous anesthesia. The difference in pupil reactivity between inhalational anesthetic and propofol may indicate differences in the alteration of midbrain reflexs in patients under inhalational or intravenous anesthesia.
| Original language | English |
|---|---|
| Pages (from-to) | 291-296 |
| Number of pages | 6 |
| Journal | Journal of Clinical Monitoring and Computing |
| Volume | 31 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 1 2017 |
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All Science Journal Classification (ASJC) codes
- Health Informatics
- Critical Care and Intensive Care Medicine
- Anesthesiology and Pain Medicine
Cite this
The effects of anesthetic agents on pupillary function during general anesthesia using the automated infrared quantitative pupillometer. / Shirozu, Kazuhiro; Setoguchi, Hidekazu; Tokuda, Kentaro; Karashima, Yuji; Ikeda, Mizuko; Kubo, Makoto; Nakamura, Katsuya; Hoka, Sumio.
In: Journal of Clinical Monitoring and Computing, Vol. 31, No. 2, 01.04.2017, p. 291-296.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The effects of anesthetic agents on pupillary function during general anesthesia using the automated infrared quantitative pupillometer
AU - Shirozu, Kazuhiro
AU - Setoguchi, Hidekazu
AU - Tokuda, Kentaro
AU - Karashima, Yuji
AU - Ikeda, Mizuko
AU - Kubo, Makoto
AU - Nakamura, Katsuya
AU - Hoka, Sumio
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Pupil reactivity can be used to evaluate central nervous system function and can be measured using a quantitative pupillometer. However, whether anesthetic agents affect the accuracy of the technique remains unclear. We examined the effects of anesthetic agents on pupillary reactivity. Thirty-five patients scheduled for breast or thyroid surgery were enrolled in the study. Patients were divided into four groups based on the technique used to maintain anesthesia: a sevoflurane–remifentanil (SEV/REM) group, a sevoflurane (SEV) group, a desflurane–remifentanil (DES/REM) group, and a propofol–remifentanil (PRO/REM) group. We measured maximum resting pupil size (MAX), reduction pupil size ratio (%CH), latency duration (LAT) and neurological pupil index (NPi). A marked reduction in MAX and %CH compared with baseline was observed in all groups, but LAT was unchanged during surgery. NPi reduced within the first hour of surgery in the SEV/REM, SEV, and DES/REM groups, but was not significantly different in the PRO/REM group. Compared with the PRO/REM group, mean %CH and NPi in patients anesthetized with SEV/REM, SEV or DES/REM were markedly lower at 1 h after surgery had commenced. There was no correlation between NPi and bispectral index. Fentanyl given alone decreased pupil size and %CH in light reflex, but did not change the NPi. NPi was decreased by inhalational anesthesia not but intravenous anesthesia. The difference in pupil reactivity between inhalational anesthetic and propofol may indicate differences in the alteration of midbrain reflexs in patients under inhalational or intravenous anesthesia.
AB - Pupil reactivity can be used to evaluate central nervous system function and can be measured using a quantitative pupillometer. However, whether anesthetic agents affect the accuracy of the technique remains unclear. We examined the effects of anesthetic agents on pupillary reactivity. Thirty-five patients scheduled for breast or thyroid surgery were enrolled in the study. Patients were divided into four groups based on the technique used to maintain anesthesia: a sevoflurane–remifentanil (SEV/REM) group, a sevoflurane (SEV) group, a desflurane–remifentanil (DES/REM) group, and a propofol–remifentanil (PRO/REM) group. We measured maximum resting pupil size (MAX), reduction pupil size ratio (%CH), latency duration (LAT) and neurological pupil index (NPi). A marked reduction in MAX and %CH compared with baseline was observed in all groups, but LAT was unchanged during surgery. NPi reduced within the first hour of surgery in the SEV/REM, SEV, and DES/REM groups, but was not significantly different in the PRO/REM group. Compared with the PRO/REM group, mean %CH and NPi in patients anesthetized with SEV/REM, SEV or DES/REM were markedly lower at 1 h after surgery had commenced. There was no correlation between NPi and bispectral index. Fentanyl given alone decreased pupil size and %CH in light reflex, but did not change the NPi. NPi was decreased by inhalational anesthesia not but intravenous anesthesia. The difference in pupil reactivity between inhalational anesthetic and propofol may indicate differences in the alteration of midbrain reflexs in patients under inhalational or intravenous anesthesia.
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U2 - 10.1007/s10877-016-9839-3
DO - 10.1007/s10877-016-9839-3
M3 - Article
VL - 31
SP - 291
EP - 296
JO - Journal of Clinical Monitoring and Computing
JF - Journal of Clinical Monitoring and Computing
SN - 1387-1307
IS - 2
ER -