Analgesic effect evaluation of nerve block during general anesthesia using pupillometry ~ Pilot study ~

Analgesic effect evaluation of nerve block during general anesthesia using pupillometry ~ Pilot study ~ - Analgesic effect evaluation of nerve block during general anesthesia using pupillometry ~ Pilot study ~

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000035139

Enrollment

Registered

2018-12-05

Start date

2018-12-05

Completion date

Unknown

Last updated

2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

knee osteoarthritis

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Patients aged 20 years or older who undergo femoral nerve block during general anesthesia

Exclusion criteria

Exclusion criteria: Patients with pupillary dysfunction Patients with ophthalmic nerve paralysis Patients using opioids before surgery Patients using drugs affect pupil diameter change(anticholinergics, dopamine D2 receptor antagonists) Patients who can not use propofol

Design outcomes

Primary

Measure	Time frame
time of determination of analgesic effect of nerve block by pupillometry	—

Secondary

Measure	Time frame
change in pupil diameter, reaction latency, reaction rate	—

Countries

Japan

Contacts

Public ContactMiho Wakabayashi

Wakayama medical university department of anesthesiology

mmasaki@wakayama-med.ac.jp073-441-0611

Outcome results