Investigation of individual differences in respiratory rate and HFVi (High Frequency Variability Index) values as indicators of pain during general anesthesia.

Investigation of individual differences in respiratory rate and HFVi (High Frequency Variability Index) values as indicators of pain during general anesthesia. - Investigation of individual differences in respiratory rate and HFVi (High Frequency Variability Index) values as indicators of pain during general anesthesia.

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000053710

Enrollment

Registered

2024-02-26

Start date

2024-02-27

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

Fracture surgery cases under general anesthesia management

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: General anesthesia surgery for fractures performed in the operating room of Showa University Yokohama Northern Hospital

Exclusion criteria

Exclusion criteria: Cases using muscle relaxants and remifentanil Cases requiring tracheal intubation

Design outcomes

Primary

Measure	Time frame
Respiratory Rate (times/min) HFVi (120 seconds/240 seconds) Fentanyl dosage	—

Secondary

Measure	Time frame
Blood pressure Heart Rate BIS ETCO2 fentanyl blood concentration (predicted value) Postoperative pain (VAS scale)	—

Countries

Japan

Contacts

Public ContactYamamura Aya

Showa University Northern Yokohama Hospital Department of Anesthesiolog

ayayamamura128@gmail.com045-949-7000

Outcome results