Electrical Current Levels to Elicit Moderate Pain and Concomitant Pupillary Response

Analysis of Electrical Current Levels to Elicit Moderate Pain and Concomitant Pupillary Response Using the PainVision

Status

Recruiting

Phases

Phase 1

Study type

Interventional

Source

JPRN

Registry ID

JPRN-jRCT1040250072

Enrollment

Registered

2025-08-05

Start date

2025-08-05

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

none

Interventions

The current intensity required to elicit a moderate pain rating of 5 on the Numerical Rating Scale (NRS) is determined by applying a weak electrical current via electrodes on the upper limb. This same

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Males and females aged 18 and over. Those who have provided written consent to participate in the research.

Exclusion criteria

Exclusion criteria: Presence of intractable pain. Presence of neuropathy or a neurological disorder. Individuals with an implanted electronic device, such as a cardiac pacemaker. Individuals currently using medication that affects pupillary response. Individuals wearing colored contact lenses.

Design outcomes

Primary

Measure	Time frame
The current intensity required to elicit a moderate pain score of NRS 5.	—

Secondary

Measure	Time frame
The pupillary response during a several-second application of the NRS 5-level current.	—

Contacts

Public ContactEisuke Kako

Department of Nursing, Nagoya City University

ekako@med.nagoya-cu.ac.jp+81-52-853-8038

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026