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Prognostic Value of Pulse Oximetry Differences

16. september 2026 opdateret af: LEE STEPHEN GYUNG WON, Yonsei University

Prognostic Significance of Multi-site Pulse Oximetry Differences in Dyspneic Emergency Department Patients

This prospective observational study aims to evaluate whether the difference between finger, earlobe and forehead SpO₂ (ΔSpO₂) measured at emergency department (ED) presentation is associated with clinical outcomes in adult patients presenting with dyspnea. We will compare ΔSpO₂ between patients with poor outcomes (death or intensive care unit [ICU] admission) and those with favorable outcomes. Secondary objectives include assessing the prognostic value of ΔSpO₂ for mortality, ICU admission, and lactate, and comparing its predictive performance with established early warning scores.

Studieoversigt

Status

Rekruttering

Betingelser

Detaljeret beskrivelse

This is a prospective observational cohort study conducted in a single ED to evaluate the prognostic significance of inter-site differences in pulse oximetry in adult patients presenting with dyspnea.

Adult patients (≥19 years) presenting with dyspnea and classified as Korean Triage and Acuity Scale (KTAS) levels 1-3 will be enrolled at the time of ED admission. During initial vital sign assessment at ED presentation, SpO₂ will be simultaneously measured at the finger, earlobe, and forehead, along with the corresponding perfusion index at each site.

The primary exposure of interest is the difference between finger and earlobe SpO₂ (ΔSpO₂). Additional inter-site SpO₂ differences involving forehead measurements will also be evaluated. Clinical and physiological data at presentation will be collected prospectively, while outcome data will be obtained through retrospective medical record review.

The primary outcome is the mean difference in ΔSpO₂ between patients with poor outcomes-defined as all-cause mortality from ED admission to hospital discharge or intensive care unit (ICU) admission-and those with favorable outcomes. Secondary outcomes include the associations of ΔSpO₂ with mortality, ICU admission, endotracheal intubation, serum lactate levels, and perfusion index, as well as the predictive performance of ΔSpO₂ using logistic regression and receiver operating characteristic (ROC) analysis. The prognostic value of ΔSpO₂ will also be compared with established early warning scores such as NEWS.

Undersøgelsestype

Observationel

Tilmelding (Anslået)

400

Kontakter og lokationer

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

Studiekontakt

Studiesteder

  • Sydkorea
    • Seoul
      • Seoul, Seoul, Sydkorea, 03722
        • Rekruttering
        • Yonsei University Severance Hospital
        • Kontakt:

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

  • Voksen
  • Ældre voksen

Tager imod sunde frivillige

Ingen

Prøveudtagningsmetode

Ikke-sandsynlighedsprøve

Studiebefolkning

We will enroll patients who meet the enrollment criteria who visit an emergency department of a tertiary teaching hospital located in Seoul, South Korea.

Beskrivelse

Inclusion Criteria:

  • Adult patients aged 19 years or older presenting to the emergency department with dyspnea, classified as KTAS level 1-3

Exclusion Criteria:

  • Patients in whom SpO₂ measurements were not obtained simultaneously
  • Patients in whom arterial blood gas analysis was not ordered at initial evaluation
  • Pregnant patients
  • Patients with facial trauma or hand trauma
  • Patients with amputation, injury, or burns at the measurement sites
  • Patients wearing nail polish
  • Patients with dyshemoglobinemia
  • Non-Korean nationality
  • Patients who did not provide consent to participate in the study

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
Dyspnea cohort
Patients visiting emergency department with dyspnea who are categorized to KTAS 1-3

Hvad måler undersøgelsen?

Primære resultatmål

Resultatmål
Foranstaltningsbeskrivelse
Tidsramme
In-hospital mortality or ICU admission
Tidsramme: From the index emergency department visit through hospital discharge, assessed up to 6 months.
In-hospital mortality or ICU admission of index visit
From the index emergency department visit through hospital discharge, assessed up to 6 months.

Samarbejdspartnere og efterforskere

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

Sponsor

Yonsei University

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)

29. maj 2026

Primær færdiggørelse (Anslået)

31. marts 2027

Studieafslutning (Anslået)

30. april 2027

Datoer for studieregistrering

Først indsendt

30. maj 2026

Først indsendt, der opfyldte QC-kriterier

16. september 2026

Først opslået (Faktiske)

17. september 2026

Opdateringer af undersøgelsesjournaler

Sidste opdatering sendt (Faktiske)

17. september 2026

Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier

16. september 2026

Sidst verificeret

1. september 2026

Mere information

Begreber relateret til denne undersøgelse

Yderligere relevante MeSH-vilkår

Andre undersøgelses-id-numre

  • 4-2025-1489
  • 6-2025-0076 (Andet bevillings-/finansieringsnummer: Yonsei University College of Medicine)

Plan for individuelle deltagerdata (IPD)

Planlægger du at dele individuelle deltagerdata (IPD)?

INGEN

IPD-planbeskrivelse

Individual participant data will not be shared due to concerns regarding patient privacy and personal information protection.

Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter

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Ingen

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