Measuring Pain Relief in Children Using Eye Responses

Developing a Method to Objectively Measure Opioid Analgesia: A Pilot Study

Observational Children's National Research Institute · NCT03605966

This study is testing a new way to measure pain relief in children aged 7 to 21 by looking at how their pupils change when they are given opioid medications.

Quick facts

Study typeObservational
Enrollment40 (estimated)
Ages7 Years to 21 Years
SexAll
SponsorChildren's National Research Institute Academic / other
Locations1 site (Washington, District of Columbia)
Trial IDNCT03605966 on ClinicalTrials.gov

What this trial studies

This observational study aims to develop an objective method for assessing opioid analgesia in pediatric patients by utilizing pupillometry, which measures changes in pupil size in response to pain. The study addresses the critical issue of inadequate pain management in children, particularly those undergoing procedures, by creating algorithms that can detect pain types and evaluate the effectiveness of opioid treatments. By focusing on children aged 7 to 21 who are receiving opioids, the study seeks to eliminate the subjective nature of pain assessment and improve opioid management practices.

Who should consider this trial

Good fit: Ideal candidates for this study are children aged 7 to 21 who are receiving opioids for pain management in a clinical setting.

Not a fit: Patients with eye conditions that prevent pupillometry or those who are hemodynamically unstable in the pediatric intensive care unit may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to more effective pain management strategies for children, reducing the risk of opioid misuse and improving overall patient care.

How similar studies have performed: While attempts have been made to objectively quantify pain, this specific approach using pupillometry in pediatric populations is novel and has not been extensively tested in prior studies.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. The subject is 7 to 21 years of age
2. The subject is receiving an opioid via bolus or a patient controlled analgesia (PCA) apparatus as part of treatment or fentanyl infusion in the pediatric intensive care unit (PICU) (generally postoperative patients).
3. The subject is willing and able to provide written informed assent/parental consent to study participation

Exclusion Criteria:

1. Eye pathology precluding pupillometry
2. For patients in the PICU, patients who are hemodynamically unstable

Where this trial is running

Washington, District of Columbia

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Analgesics, Antipyretics and Anti-Inflammatory Drugs Causing Adverse Effects in Therapeutic Useanalgesiapainnociceptionpupillometryanalgesicopioid
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.