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Pupillometry in Identifying Risk of Postoperative Opioid-induced Respiratory Depression in Children Undergoing Tonsillectomy

6. maj 2026 opdateret af: NeurOptics Inc

Pupillometry in Identifying Postoperative Opioid-induced Respiratory Depression in Children Undergoing Tonsillectomy

This study will evaluate whether quantitative pupillometry measurements can be used to identify children at risk for postoperative opioid-induced respiratory depression (OIRD) following tonsillectomy. Opioid-induced respiratory depression is a serious and potentially life-threatening complication that can occur after surgery, and current monitoring approaches are limited in their ability to predict which patients are at highest risk.

In this prospective observational cohort study, approximately 300 pediatric patients undergoing tonsillectomy will undergo non-invasive pupillometry measurements at defined perioperative time points, including preoperative, intraoperative, and postoperative periods. Pupillometry measurements will be collected using a commercially available, FDA-regulated infrared pupillometer. These measurements will include pupil size, constriction and dilation velocities, and latency in response to light stimulation.

Pupillometry data will be collected for research purposes only and will not be used to guide clinical care or treatment decisions. Standard clinical care will not be altered as part of this study. Clinical outcomes, including the occurrence of postoperative opioid-induced respiratory depression, opioid use, sedation levels, pain scores, and other postoperative events, will be recorded from the medical record.

The goal of this study is to evaluate the relationship between pupillary response patterns and the occurrence of postoperative respiratory depression, and to support the development of predictive models that may improve early identification of patients at risk for opioid-related adverse events.

Studieoversigt

Status

Rekruttering

Betingelser

Intervention / Behandling

Detaljeret beskrivelse

This is a prospective, observational cohort study designed to evaluate the relationship between perioperative pupillary responses and postoperative opioid-induced respiratory depression (OIRD) in pediatric patients undergoing tonsillectomy.

Approximately 300 participants aged 3 to less than 18 years will be enrolled across participating clinical sites. Pupillometry measurements will be obtained using a portable, automated infrared pupillometer at predefined perioperative time points, including preoperative baseline, intraoperative periods, and postoperative recovery. Measurements will include resting pupil diameter, pupillary light reflex parameters (including percent constriction, constriction velocity, dilation velocity, and latency), and pupillary unrest in ambient light.

Pupillometry measurements will be collected solely for research purposes and will not be used to guide clinical management. All patients will receive standard perioperative care as determined by the clinical team.

The primary outcome is the occurrence of postoperative opioid-induced respiratory depression, defined as persistent oxygen desaturation (SpO2 <90%) or respiratory rate <8 breaths per minute in the absence of airway obstruction in the post-anesthesia care unit. Secondary outcomes include opioid consumption, sedation scores, pain scores, and postoperative complications such as nausea and vomiting.

Data will be analyzed to assess the association between pupillary response parameters and the occurrence of respiratory depression, and to support development of predictive models for identifying patients at increased risk of opioid-related adverse events.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

300

Kontakter og lokationer

Dette afsnit indeholder kontaktoplysninger for dem, der udfører undersøgelsen, og oplysninger om, hvor denne undersøgelse udføres.

Studiekontakt

Undersøgelse Kontakt Backup

Studiesteder

    • California
      • San Francisco, California, Forenede Stater, 94158
        • Ikke rekrutterer endnu
        • UCSF Benioff Children's Hospital
        • Kontakt:
        • Kontakt:
    • Pennsylvania
      • Pittsburgh, Pennsylvania, Forenede Stater, 15213
        • Rekruttering
        • UPMC Children's Hospital of Pittsburgh
        • Kontakt:
        • Kontakt:
        • Ledende efterforsker:
          • Mihaela Visoiu, MD

Deltagelseskriterier

Forskere leder efter personer, der passer til en bestemt beskrivelse, kaldet berettigelseskriterier. Nogle eksempler på disse kriterier er en persons generelle helbredstilstand eller tidligere behandlinger.

Berettigelseskriterier

Aldre berettiget til at studere

  • Barn

Tager imod sunde frivillige

Ja

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

The study population will consist of pediatric patients aged 3 to less than 18 years undergoing tonsillectomy with or without adenoidectomy at participating clinical sites. Participants will be enrolled from routine clinical care settings and will receive standard perioperative management. The study will include patients across a range of clinical characteristics representative of the typical pediatric tonsillectomy population.

Beskrivelse

Inclusion Criteria:

  • Age 3 to less than 18 years
  • Scheduled to undergo tonsillectomy with or without adenoidectomy
  • Planned postoperative recovery in a monitored clinical setting (e.g., post-anesthesia care unit)
  • Ability to obtain informed consent from parent or legal guardian and assent from the participant when developmentally appropriate

Exclusion Criteria:

  • Known neurologic or ophthalmologic conditions that may affect pupillary function
  • Use of medications known to significantly alter pupillary response outside of standard perioperative care
  • Inability to obtain adequate pupillometry measurements (e.g., due to eye injury or inability to safely perform measurement)
  • Patients not receiving opioids as part of perioperative care
  • Any condition that, in the opinion of the investigator, would interfere with study participation or data interpretation

Studieplan

Dette afsnit indeholder detaljer om studieplanen, herunder hvordan undersøgelsen er designet, og hvad undersøgelsen måler.

Hvordan er undersøgelsen tilrettelagt?

Design detaljer

Kohorter og interventioner

Gruppe / kohorte
Intervention / Behandling
Pediatric Tonsillectomy Patients
Pediatric participants aged 3 to less than 18 years undergoing tonsillectomy. Participants will undergo non-invasive pupillometry measurements at predefined perioperative time points. Pupillometry data are collected for research purposes only and will not be used to guide clinical care. All participants will receive standard perioperative management as determined by the clinical team.
Non-invasive pupillometry measurements will be performed using a commercially available, FDA-regulated infrared pupillometer. Measurements will be collected at predefined perioperative time points for research purposes only and will not be used to guide clinical care.
Andre navne:
  • Quantitative Pupillometry

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Occurrence of Postoperative Opioid-Induced Respiratory Depression
Tidsramme: From arrival in post-anesthesia care unit (PACU) through PACU discharge (up to 4 hours postoperatively)
Postoperative opioid-induced respiratory depression is defined as the occurrence of either (1) oxygen saturation (SpO2) <90% for a sustained period, or (2) respiratory rate <8 breaths per minute, in the absence of airway obstruction, during the post-anesthesia care unit stay. Events will be identified from clinical monitoring data and medical record documentation.
From arrival in post-anesthesia care unit (PACU) through PACU discharge (up to 4 hours postoperatively)

Sekundære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
Opioid Consumption
Tidsramme: From induction of anesthesia through transfer to the post-anesthesia care unit (PACU) (up to 2 hours) through PACU discharge (up to 4 hours postoperatively); data collection across these periods may extend up to 6 hours in total.
Total opioid dose administered during the intraoperative and immediate postoperative period, recorded from the medical record and normalized to body weight where appropriate.
From induction of anesthesia through transfer to the post-anesthesia care unit (PACU) (up to 2 hours) through PACU discharge (up to 4 hours postoperatively); data collection across these periods may extend up to 6 hours in total.
Sedation Level
Tidsramme: During PACU stay (up to 4 hours postoperatively)
Sedation level assessed using clinically documented sedation scales recorded during routine care in the post-anesthesia care unit (PACU), including scales such as the Richmond Agitation-Sedation Scale (RASS; range -5 to +4, where more negative values indicate deeper sedation) or equivalent institution-specific scales. Higher levels of sedation correspond to lower (more negative) scores.
During PACU stay (up to 4 hours postoperatively)
Pain Scores
Tidsramme: During PACU stay (up to 4 hours postoperatively)
Pain intensity scores measured using age-appropriate validated scales (e.g., Numeric Rating Scale or FLACC) as recorded during routine clinical care. The Numeric Rating Scale (0 to 10, where 0 indicates no pain and 10 indicates worst possible pain) and for the Face, Legs, Activity, Cry, Consolability (FLACC) scale (0 to 10, where higher scores indicate greater pain), as recorded during routine clinical care in the post-anesthesia care unit (PACU). Scale selection will be based on patient age and clinical appropriateness.
During PACU stay (up to 4 hours postoperatively)
Postoperative Nausea and Vomiting
Tidsramme: During PACU stay (up to 4 hours postoperatively)
Occurrence of nausea and/or vomiting documented in the medical record during the PACU stay.
During PACU stay (up to 4 hours postoperatively)

Samarbejdspartnere og efterforskere

Det er her, du vil finde personer og organisationer, der er involveret i denne undersøgelse.

Sponsor

Samarbejdspartnere

Efterforskere

  • Studieleder: Jeffrey W Oliver, PhD, NeurOptics Inc

Datoer for undersøgelser

Disse datoer sporer fremskridtene for indsendelser af undersøgelsesrekord og resumeresultater til ClinicalTrials.gov. Studieregistreringer og rapporterede resultater gennemgås af National Library of Medicine (NLM) for at sikre, at de opfylder specifikke kvalitetskontrolstandarder, før de offentliggøres på den offentlige hjemmeside.

Studer store datoer

Studiestart (Faktiske)

4. maj 2026

Primær færdiggørelse (Anslået)

30. april 2027

Studieafslutning (Anslået)

30. april 2027

Datoer for studieregistrering

Først indsendt

28. april 2026

Først indsendt, der opfyldte QC-kriterier

4. maj 2026

Først opslået (Faktiske)

7. maj 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

8. maj 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

6. maj 2026

Sidst verificeret

1. april 2026

Mere information

Begreber relateret til denne undersøgelse

Andre undersøgelses-id-numre

  • NIH-OiRD
  • R44DA055407 (U.S. NIH-bevilling/kontrakt)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

UBESLUTET

IPD-planbeskrivelse

The study team has not yet determined whether individual participant data will be shared. Any future data sharing will be evaluated following study completion and will consider participant privacy, institutional policies, intellectual property considerations, and applicable NIH and regulatory requirements.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

Studerer et amerikansk FDA-reguleret lægemiddelprodukt

Ingen

Studerer et amerikansk FDA-reguleret enhedsprodukt

Ja

produkt fremstillet i og eksporteret fra U.S.A.

Ingen

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